JP3315741B2 - Demand control device and demand control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demand control device and a system therefor, and more particularly to a demand control device for more appropriately controlling a load.

[0002]

2. Description of the Related Art In recent years, there has been an increasing movement of power consumers to set a maximum power consumption value, that is, a power demand value, and to suppress the total power consumption value within the range of the demand value to save energy. For example, demand management
It is performed based on the contract power set between the customer and the power company. That is, the customer must make sure that the average power consumption for a predetermined time period (generally 30 minutes, hereinafter referred to as a demand time period) does not exceed the contract power. The demand control device constantly monitors the amount of change every moment based on the amount of power used, continuously predicts the maximum power for each demand time period, and alerts when there is a possibility that the contracted power or the management target power will be exceeded. Is issued, the load is automatically cut off according to a preset control method, and when the maximum electric power has a margin, it is automatically restored. In this way, the demand control device efficiently controls and operates various facilities to use rational power so as not to exceed the contracted power within the demand time period, reduce the power peak, and improve the load factor The power is effectively managed and utilized.

As a conventional demand control device, as disclosed in Japanese Patent Application Laid-Open No. 55-43950, the total power consumption of the load group at the end of the demand time period is calculated from the current power consumption of the load group. What to predict and Japanese Patent Application Laid-Open
As disclosed in Japanese Patent Application Laid-Open No. 5125, control of the operation state of the load without grasping the operation state of the load, and as disclosed in Japanese Patent Application Laid-Open No. 57-19538, the set temperatures of all air conditioners are kept constant. Some of them are controlled by the change value.

[0004]

However, Japanese Patent Application Laid-Open No.
The control device of No. 43950 has a problem that a complicated calculation is required to predict the total power consumption of the load group at the end of the demand. In addition, Japanese Unexamined Patent Publication No.
In the control device of -45125, there is a problem that outputting a control signal depending on the operation state of the load has no effect. Further, the control device disclosed in Japanese Patent Application Laid-Open No. 57-19538 has a problem that control according to environmental conditions cannot be performed because the temperature is uniformly controlled at a constant temperature regardless of the set temperature of the air conditioner.

Further, the conventional demand control is performed by interrupting the power supply to the load, but it may not be appropriate to interrupt the power supply to the device.
For example, in a general household, the power consumption value has one peak in the evening, and one of the devices used at this peak time is an electric water heater. When the electric water heater is used at this peak, it is extremely inconvenient if the power supply to other devices is cut off or, conversely, if the power supply to the electric water heater is cut off.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a demand control device and a system thereof capable of performing load control more suitable for situations in a home or a factory. It is assumed that.

[0007]

Means for Solving the Problems] demand control apparatus according to the invention is connected to the load group, in order to below power value set the total power consumption of the load group, according to the priority order set In a demand control device for controlling an operation state of a load, priority setting means for selecting and setting one or more loads to be controlled and an operation state of the load from a group of loads by designating priority and setting the load control; and target power value setting means for setting a target power value of the target power value set by the target power value setting means is apportioned priority number set by the priority setting unit, prorated point and demand An area setting means for creating an area corresponding to the number of priorities by connecting the target power value after the time limit, and a load
Power monitoring means for monitoring the total power consumption of the group;
A region determining means for determining whether the total power consumption of the load group by the power monitor means has entered the area set by the area setting means, based on a determination result of the area determination means
Zui by, and a control signal output means for outputting a control signal of the operating state of each load, and is characterized in that for controlling the operating state of the load by the control signal.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control apparatus for controlling the operating state of the load in accordance with the priority order set, each load Operating state is 0 percent
Multiple operations indicated by more than
One or more loads to be controlled from the load group and a predetermined operating capacity greater than 0%
Operating state and operating state of the load, monitoring and priority setting means for setting to prioritize, and target power value setting means for setting a target power value of the load control, the operating state of each load represented by Monitoring means; power monitoring means for monitoring the total power consumption of the load group; and if the total power consumption by the power monitoring means exceeds the target power value by the target power value setting means, the priority setting means. according to the priorities set by said operating condition monitoring hand
The operation status of each load is monitored by the
By comparing the <br/> operating state of the set load by rolling with said priority setting means, and determining control load determiner load for controlling the operating condition, the determination of the control load determiner
Based on the result, the operation state of the load is determined by the priority setting procedure.
Control to change to the operation state of the load set by the stage.
And a control signal output means for outputting a control signal to control,
It is characterized by controlling the operation state of the load.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control apparatus for controlling the operating state of the load in accordance with the priority order set, each load Operating state is 0 percent
Multiple operations indicated by more than
One or more loads to be controlled from the load group and a predetermined operating capacity greater than 0%
And the priority of the operation status of the load indicated by
Te and priority setting means for setting a target power value setting means for setting a target power value of the load control, for example, detects the setting value and the current value of the operation determination factors such as room temperature or water temperature, of each load An operation determination factor monitoring unit that monitors a set value and a current value of the operation determination factor, an operation state determination unit that estimates an operation state of the load from the operation determination factor monitored by the operation determination factor monitoring unit, Power monitoring means for monitoring the total power consumption value of the load group; and if the total power consumption value by the power monitoring means exceeds the target power value by the target power value setting means, the power setting means sets the priority order setting means. according to the priority, estimated by said driving state judging means
And operating state of each load that is constant, the priority setting means
Control load determining means for determining a load for controlling the operating state by comparing the operating state of the load with the set operating state of the load; and operating state of the load based on the determination result of the control load determining means.
Is the operating state of the load set by the priority setting means.
And a control signal output means for outputting a control signal for controlling the operation state of the load.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control apparatus for controlling the operating state of the load, the load control target power value and target power value setting means for setting, each load and operation determination factor monitoring means for monitoring the current value of the operation determination factors, the operation determination factor monitoring unit allogeneic load per a set value predetermined from the monitored operation determination factor by The set value determination means and the total power consumption of the load group
Power monitoring means for monitoring and power monitoring means
The total power consumption is the target power by the target power value setting means.
If it exceeds the value, the judgment result of the setting value judgment means
Control signal output means for outputting a control signal of a set value of an operation determination factor to each load based on the set value, and controlling the set value of the operation determination factor of the load.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control apparatus for controlling the operating state of the load, the load control target power value The target power value setting means to be set, the operation determination factor monitoring means for monitoring the current value and the set value of the operation determination factor of each load, and the operation determination factor monitoring means
The current value and the set value determines the set value determination unit for each homologous load value based on the difference in the operation determination factors for each load detected Ri, power monitor means for monitoring the total power consumption of the load group
And the total power consumption by the power monitoring means
If it exceeds the target power value by the power value setting means,
Control signal output means for outputting a control signal of the set value of the operation determination factor to each load based on the determination result of the set value determination means, and controlling the set value of the load operation determination factor. It is a feature.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control system for controlling the operating state of the load, the load control target power value Target power value setting means to be set;
For example, the remaining hot water monitoring means for monitoring the state of the remaining hot water in the electric water heater, and use the hot water amount prediction means for predicting future use amount of hot water from the remaining hot water that is monitored by the remaining hot water monitoring means, the monitored load Power consumption value prediction means for predicting the total power consumption value from the total power consumption value of the group, and the target
The target power value set by the power value setting means and the use
The used hot water amount predicted by the hot water amount predicting means and the use
And determining the operating condition determining means for operating condition of the electric water heater from the total power consumption value by the power value predicting means, the driving state-size
A demand controller having control signal output means for outputting a control signal of an operation state of the electric water heater based on the determination result by the determination means , remaining hot water amount detection means for detecting remaining hot water amount, and output from the control signal output means. Based on the control signal
It is characterized in being constituted by an electric water heater having an operating condition control means for controlling the Zui and operating conditions.

Furthermore, connected to the load group, in order to below power value set the total power consumption of the load group, the demand control system for controlling the operating state of the load, the load control target power value Target power value setting means to be set;
Power consumption value predicting means for predicting the total power consumption value from the total power consumption value of the monitored load group; and setting the target power value.
Target power value set by the means and the used power value prediction
And allocated power value determining means for determining the available allocated power value of the electric water heater from the total power consumption value predicted by means,
A demand controller having control signal output means for outputting an allocated power value to the electric water heater based on the determination result of the allocated power value determining means; a remaining hot water amount detecting means for detecting the remaining hot water amount; and use the hot water amount prediction means for performing a prediction of the future use amount of hot water from the detected remaining hot water by means predicted using hot water by the control signal allocated power value outputted from the output means and the use amount of hot water predicting means and determining the operating condition determining means for operating conditions from the amount, the operation
An electric water heater having operating state control means for controlling the operating state based on the determination result of the state determining means .

[0014]

[Action] demand control apparatus in the present invention, one or more loads to be controlled and sets to select to prioritize among the load group by priority setting means, the target power value setting means Set the target power value for load control. Once the priority order and the target power value are set, the target power value is apportioned by the number of priorities by the area setting means, and the apportioned point is connected to the target power value after the elapse of the demand time period to give the priority order. Create an area equivalent to a number. Next, when it is determined that the total power consumption value of the load group has entered the area set by the area setting means, the control signal output means outputs the operation state control signal to each load in accordance with the priority order. This controls the operating state of the load.

In the demand control device according to the present invention, the operation state of each load is set to a predetermined change of 0% or more.
Having a plurality of driving states indicated by a changeable driving capability,
One or more loads to be controlled from the load group by a priority setting means and a predetermined load larger than 0%
Thereby setting to prioritize the operating state of the load represented by the operating capacity, it sets a target power value of the load controlled by the target power value setting means. When the total power consumption value of the load group exceeds the target power value, the operation state of each load monitored by the operation state monitoring means and the priority order setting means are set according to the priority order set by the priority order setting means.
By comparing the operation state of the more set load, to determine the load for controlling the operating state, the control signal output means with respect to the determined load, priority setting manually operating state of the load
The operation state of the load is controlled by outputting a control signal to change to the operation state of the load set by the stage .

In the demand control device according to the present invention, the operation state of each load is set to a predetermined change of 0% or more.
Having a plurality of driving states indicated by a changeable driving capability,
Use priority setting means to control load group
One or more loads and a predetermined greater than 0 percent
The priority of the operation status of the load indicated by the driving capability is specified.
An operation determination factor that is a factor that determines a load operation state, for example, an air conditioner detects room temperature, an electric water heater detects hot water temperature, and the like, and detects an operation state from the detected operation determination factor of each load. To estimate the load that controls the operating state,
The priority order is determined by the control signal output means for the determined load.
Change to the operation state of the load set by the position setting means
The operation state of the load is controlled by outputting a control signal for controlling the operation of the load.

Further, the demand control device according to the present invention
Sets a target power value of the load controlled by the target power value setting means, when the total power consumption of the load group exceeds the target power value, the set value determining means is monitored by the operation determining factor monitoring means A constant set value is determined for each load of the same type from the detected value of the load operation determination factor, and the control signal output means outputs a control signal of the operation determination factor set value to each load to thereby determine the load operation determination factor. Control the set value.

Further, the demand control device according to the present invention
Sets a target power value of the load controlled by the target power value setting means, when the total power consumption of the load group exceeds the target power value, operation determination factors for each load, which is monitored by the operation determining factor monitoring means The value based on the difference between the current value and the set value is determined for each load of the same kind, and the control signal output means outputs a control signal of the set value of the drive determination factor to each load, thereby setting the drive determination factor of the load. Control.

The demand control device according to the present invention
The demand controller predicts the future hot water consumption from the state of the remaining hot water of the electric water heater monitored by the remaining hot water monitoring means, and predicts the future power consumption from the total power consumption of the monitored load groups. The operating state of the electric water heater is determined by the operating state determining means from the set target power value, the predicted amount of used hot water and the total used power value, and the control signal output means controls the operating state of the electric water heater. Is output. In the electric water heater, the remaining hot water amount is detected by the remaining hot water amount detecting means, and the operating state is controlled by the operating state control means.

Further, the demand control device according to the present invention
The demand controller predicts the total power consumption in the future by the power consumption value predicting means from the total power consumption value of the monitored load group, and allocates the allocated power from the set target power value and the predicted total power consumption value. The value predicting means predicts the available power value of the electric water heater, and the allocated power value outputting means outputs the allocated power value to the electric water heater. In the electric water heater, the used hot water amount is predicted by the used hot water amount predicting means from the detected remaining hot water amount, and the operating state is determined by the operating state determining means from the allocated power value and the predicted used hot water amount, The operating state is controlled by the operating state control means.

[0021]

[Embodiment 1] The demand control device shown as the first embodiment has the configuration shown in FIG.
As shown in (a), a setting unit 1 for setting an area from a priority order and a target power value, a power monitoring unit 2 for monitoring a total power consumption value of a load group, and an area in which the total power consumption value is set < A state control unit that includes a determination unit 3 that determines whether the load has not entered and a control signal output unit 4 that outputs a control signal of the operation state of each load, and controls the operation state of the load according to an external command. Loads L1, L2, L having M1, M2, M3
3 is connected.

Further, as shown in FIG.
A priority setting means 1a for designating one or more loads to be controlled from a load group and an operation state of the loads by designating a priority, and a target power value setting for setting a target power value for load control. Means 1b, the target power value set by the target power value setting means 1b is apportioned by the priority number set by the priority setting means 1a, and the apportioned value is connected to the target power value after the elapse of the demand time period. In this case, an area setting means 1c for creating an area corresponding to the number of priorities is provided.

Here, in order to simplify the description, a case where three loads L1, L2 and L3 are connected to the demand control device will be described. Then, as shown in FIG.
As a priority order in which the setting unit 1 turns off the power of the load, the power supply of the load L1 is turned off in the priority order 1, and the load L is turned off in the priority order 2.
A description will be given of a case where the power supply of the load L3 is set to OFF, the power supply of the load L3 is set to the priority order 3, and the target power value is set to 1.5 kW. The region setting and the operation state control are performed as shown in FIG. The setting unit 1 apportions the set target power value of 1.5 KW with the number of priorities of 3 (here, equally divided into three), and calculates 0 KW, 0.5 KW, and 1.0 KW as the power value at the start of the demand time period. . Then, a line X1 connecting the power value 0 KW at the start of the demand time period and the target power value 1.5 KW at the end of the demand time period, the power value 0.5 KW at the start of the demand time period, and the target power value 1.5 kW at the end of the demand time period are calculated. An area surrounded by the connecting line X2 is set as an area 1. Similarly, as shown in FIG.
Region 3 is set.

Next, the operation state control when the loads L1, L2, and L3 are sequentially turned on and the total power consumption of the load group changes as indicated by the dotted line in the figure will be described. The power monitoring unit 2 monitors the total power consumption of the load group. When the total used power value monitored by the power monitoring unit 2 enters the area 1 shown in FIG. 2A (a in the figure), the determination unit 3 determines this, and the control signal output unit 4 determines the priority. A signal for turning off the power of the load L1 which is 1 is output. The load L1 that has received the control signal turns off the load power by the state control unit M1.
After the load L1 is turned off, if the total power consumption of the load group enters the area 2 (b in the figure), the power of the load L2 having the priority order 2 is turned off in the same procedure. Thereafter, when the total used power value moves from the area 2 to the area 1, the determination unit 3 determines this, turns on the power of the load L2 having the priority order 2, and automatically restores the load L2. When the total used power value comes out of the area 1, the load L1 is automatically returned in the same procedure.

Next, a case where the demand time period starts while the load L1 is ON will be described. As shown in FIG. 2B, when the demand time period starts while the load L1 is on, the load L1 is turned off, but the load L1 is turned on when the power consumption decreases and the vehicle leaves the area 1. become. FIG. 2B shows the operation state control when the power consumption of the load L1 is 0.2 KW and the demand time period starts while only the load L1 is ON. First, since the load L1 is ON, the used power value enters the area 1 (c in the figure). Then, the load L1 is turned off (d in the figure). Accordingly, the used power value leaves the area 1 (e in the figure), and the load L1 is turned on again (f in the figure). in this way,
When the demand time period starts while the load L1 is ON,
The load L1 sometimes repeats ON / OFF, but finally turns ON without any problem.

Conventionally, when demand control is performed, generally, Japanese Patent Application Laid-Open No. 55-85842 or Japanese Patent Application Laid-Open No. 55-49
As shown in No. 932, the power consumption at the end of the demand time period is predicted by calculation from the current power consumption value and the change rate. This calculation is performed at regular intervals within the demand time period. If the predicted value exceeds the target value, some control is performed. On the other hand, in this embodiment, the calculation for the prediction which has been conventionally performed is not performed, and the region (or the table having the same contents as the region) created in advance as shown in FIG. Then, the control is performed.

Embodiment 2 FIG. In the above-described embodiment, the case has been described where the loads L1, L2, and L3 can assume only the operation state of ON or OFF. However, the load of an air conditioner, a water heater, or the like can change the operation capacity. Therefore, in addition to turning the operation state ON or OFF, for example, there are cases where the operation is performed at 80% power and cases where the operation is performed at 50% power. FIG. 3 is a diagram illustrating an example of the load, the operation state of the load, and the priority when the load can change the operation state (= operation capacity). As shown in FIG. 3A, the operation state of the load A is set to 80% power as the priority 1 and the operation state of the load B is set to 80% power as the priority 2. Also, as the priority 3, the operation state of the load A is changed to 8 again.
It is set to reduce the power from 0% to 50%.
Similarly, priority 4 is set to operate the load B with the power reduced from 80% to 50%.
Further, the priority 5 specifies that the load C should be reduced to 50% power, and the priority A indicates that the load A should be reduced to 50%.
% Power is set to be turned off. Also,
In FIG. 3B, the target power value 6 KW is divided into six equal parts with the priority number 6 set in FIG. 3A, and the points of the divided values 1, 2, 3, 4, 5 KW are By connecting the target power value of 6 KW at the end of the demand time period,
2, 3, 4, 5, and 6 can be set. Thus, the number of priorities and the number of loads do not need to match. FIG.
As shown in (6), six priorities can be designated for three loads A, B, and C. That is, it is possible to set an arbitrary number of priorities for an arbitrary number of loads. The operation of the example shown in FIGS. 3A and 3B is the same as that in the case of FIG. 2 described above. When the power consumption value is entered in each area, the priority order corresponding to the area is set. The power consumption is controlled by changing the designated load to the designated operation state.

Embodiment 3 FIG. In the above-described two embodiments, the case where the loads L1, L2, L3 or the loads A, B, C exist and these three loads are assigned priority and some operation state is controlled has been described. It is not necessary to specify a priority order for all of the loads to restrict any operating state. For example, if the load L3 is 100%
In the case of a load that needs to keep the operating state of the load L3, no priority is set for the load L3, and the priority is set only for the loads L1 and L2 to limit the operating state. It does not matter. That is, it is not necessary to set priorities for all loads in the load group connected to the demand control device, and set a priority order for some of the loads in the load group to change the operation state. It may be restricted.

Embodiment 4 FIG. As shown in FIG. 4, a demand control device shown as a fourth embodiment includes a setting unit 1 for setting a priority and a target power value, a power monitoring unit 2 for monitoring a total power consumption value of a load group, and a total power consumption value. And a control signal output unit 4 that outputs a control signal of the operation state of each load, a determination unit 3 that determines which operation state of the load is to be controlled in accordance with the set priority when the power exceeds the target power value, A state control unit M1, M2, M3 for controlling the operation state of the load according to an external command and detecting the operation state of the load is constituted by a load state monitoring unit 5 (an example of operation state monitoring means) for monitoring the operation state. It is connected to loads L1, L2, L3 having state detectors N1, N2, N3.

The control judging method will be described in detail. As shown in FIG. 5, first, the power monitoring unit 2 monitors the total power consumption of the load group (step 1). The determination unit 3 compares the monitored total power consumption value with the target power value set by the setting unit 1, and if the total power consumption value is within the target power value, continues the monitoring as it is. For example, the operation status detected by the load status detection unit set to priority 1 is monitored by the load status monitoring unit 5 (step 3,
Step 4). When the operation state of the load is higher than the state set by the priority according to the monitor, the control signal output unit 4 outputs a control signal for controlling the operation state of the load to the state set by the priority. The load state is controlled by the load state control unit (step 5). If the operation status of the load already matches the status set in the priority order,
If the used power value is small, the total used power value is monitored again (step 6), and the total used power value is compared with the target power value (step 7).

If it is determined in step 7 that the power is within the target power value, the monitoring is continued. If the power is still exceeding the target power value, the priority number N is incremented (step 8). It is determined whether or not it is (step 9). If you have not exceeded your registration priority,
Returning to step 4 again, the operating state of the load set in the next priority order is controlled.

Next, a specific example of this operation will be described with reference to FIG. Here, as shown in FIG. 4 (b), the setting unit 1 sets the priority order and the operating state of the load as shown in FIG. 4 (b), and as shown in FIG. When L1 is turned off in advance and loads L2 and L3 are turned on,
It is assumed that the control determination method shown in FIG. 5 starts.
First, if the total power consumption value of the load group exceeds the target power value in Steps 1 and 2, the process goes to Step 3 where N is set to 1 and the state of the device having the priority 1 is changed to the load status. The status is monitored by the status monitor 5. In this case, the load state of the load L1 is monitored, and since the load L1 is in the OFF state, it is monitored that the operation state of the load 1 designated as the priority order 1 is OFF, and the setting unit 1 Is found to be the same as the state set by Therefore, the result of step 4 is YES, step 5 is skipped, and step 6 is executed.
If the total used power value still exceeds the target power value in Steps 6 and 7, 1 is added to N to become 2. Next, in step 9, since the number of registration priorities is 3, the process returns to step 4. In step 4, the state of the device having the priority 2 is monitored by the load state monitor 5. In this case, the state of the load L2 is monitored, and it is found that the state of the load L2 is ON.
The setting unit 1 sets the load L2 to OFF as priority order 2. Therefore, it is found in step 4 that the status of the device of priority 2 is not as set. For this reason,
In step 5, the device, that is, the load L2 is turned off.
The control is performed as follows. This control is performed by the determination unit 3 outputting a control signal to the state control unit M2 of the load L2 via the control signal output unit 4. After the end of Step 5, the total power consumption value and the target power value are compared again in Steps 6 and 7, and if the total power consumption value exceeds the target power value, 1 is added to N again and N = It becomes 3. Then, Step 4 is performed according to Step 9.
And the same control as in the case of the load L2 described above is performed. That is, since the actual operation state differs from the operation state set by the setting unit 1 also for the load L3, the control signal output unit 4 outputs a control signal for turning off the load L3 in step S5.

Embodiment 5 FIG. In the fourth embodiment, the loads L1, L2, and L3 are ON.
Although the description has been given of the case where the operation state is taken as OFF or OFF, as shown in FIG. 3, even in the case where the load can change the operation state, it is possible to control the load using the same control judgment method as in the above-described embodiment. It is possible.

Embodiment 6 FIG. In the fourth embodiment, as a method of grasping the operation state of the load, monitoring is performed before control.
The same effect can be obtained by storing the notification at the time of the rise of the load or at the time of the state change.

As described above, in the fourth to sixth embodiments, the load control unit 5 is provided with the load state monitoring unit 5 and the state detecting unit for each load. The load state monitoring unit 5 of the demand control device monitors the operation state of the received load, and compares the operation state corresponding to each priority set by the setting unit 1 according to the priority. If the operating conditions do not match, control is performed so that they match.

Embodiment 7 FIG. Next, as shown in FIG. 6, the demand control device shown as the seventh embodiment has substantially the same configuration as that of the fourth embodiment, except for the state detection unit N1 provided in the loads L1, L2, and L3. , N2, N3 instead of detecting the operating state of the load itself, at room temperature and detects the state of the determining operation determination factor whether to perform the operation of loading the water temperature, the determination unit 3, operation determination factor monitoring unit 5 is the state detector N1, N2, N
3 is that the operation state of the load is determined from the state of the load operation determination factors, such as room temperature and water temperature, detected by step 3. Then, when the total power consumption value of the load group exceeds the target power value, the determination unit 3 determines which load operation state is to be controlled according to the set priority. Operation determination factor monitor 5
In, the current value and the set value of the operation determination factor detected by the load state detection unit are monitored.

The control judging method in this embodiment is shown in FIG.
5 is performed in the same manner as in the flowchart shown in FIG. 5, but in the fourth embodiment, the determination method in step 4 shown in FIG. 5 directly monitors the operation state of the load and compares whether it is the same as the set state. On the other hand, in this example, the comparison target is not the operation state of the device, but the operation determination factors such as room temperature and water temperature for determining whether to operate the device are compared, and this detection is performed. The difference is that the driving judgment factor is compared with the driving judgment factor set in advance by the setting unit.

Next, a specific example of this embodiment will be described. For example, the operation state of each load is determined as shown in FIG. Here, in order to simplify the explanation, the load is set to a cooling machine having an operating state of 50% operating power for keeping the room temperature constant and an operating state of 100% operating power for lowering the room temperature. The case where the set value is set to 24 degrees, the room temperature is set as a factor for determining the operation of the air conditioner, and the temperature difference that can be recognized by the cooling unit is set to 1 degree will be described. State detector N
1, N2, and N3 detect the set value of 24 degrees set in the air conditioner and the current room temperature, and output this to the demand control device 100 as an operation determination factor. When the current room temperature monitored by the demand control device is the set temperature (d to d in the figure)
e) is assumed to be the operating state of the air conditioner for keeping the room temperature constant (that is, the operating state with an operating power of 50%), and when the room temperature is higher than the set temperature (c to d in the figure, e
During the period from to f), the operation state of the air conditioner is estimated to be the operation state for lowering the room temperature (that is, the operation state with the operation power of 100%). This estimation result can be used as the operation state of each load in step 4 shown in FIG. 5, and is compared with the operation state set in advance by the setting unit 1.
Each cooling device is controlled according to the flowchart shown in FIG.

Embodiment 8 FIG. Next, as shown in FIG. 8, the demand control device shown as the eighth embodiment has substantially the same configuration as that of the fourth embodiment, except for the loads L1, L2, and L.
3 is provided with state detectors N1, N2, N3 for detecting current values of operation determination factors such as room temperature, water temperature, etc. Further, the load values L1, L2, L3 are provided with control signals for setting values of room temperature, water temperature, etc. The point is that set value control units M1, M2, M3 for changing are provided. Further, the demand control apparatus 100 is different in that only the target power value is set in the setting unit 1 and the determination unit 3 determines a constant set value from the current value of the load operation determination factor for each type of load. That is, in this embodiment, when a plurality of different types of loads, such as a water heater and a cooling machine, are respectively connected, the set values thereof are controlled from the demand control device for each of the same types of loads, such as the water heater and the cooling machine. It is output as a signal, and the set value of the load is changed. The control signal output unit 4 outputs a signal for controlling the set value of the operation determination factor of the load, the load state control unit controls the set value of the operation determination factor, and the load state detection unit controls the set value of the operation determination factor. Is detected.

The determination of the set value of the constant operation determination factor output to each load is performed as shown in FIG. Here, in order to simplify the explanation, all the loads are assumed to be cooling units, the room temperature is used as an operation determination factor, and the room temperature is set in units of one degree. First, the total power consumption of the load group is monitored (step 1). Then, the total power consumption value is compared with the target power value, and if the total power consumption value is within the target power value, the monitoring is continued as it is. If the total power consumption value is exceeded, the state provided for each load is detected. The current room temperature detected by the units N1 to N3 is monitored, and the lowest room temperature is set as the set temperature of all the cooling machines from the monitoring result (steps 3 and 4).
As shown in FIG. 8, in the method of setting the lowest room temperature as the set temperature of all the cooling units, the judgment unit 3 judges the lowest room temperature as a set value, and controls this set value from the control signal output unit 4. The signal is output to all the air conditioners. Each cooling device receives the control signal in the provided set value control units M1 to M3, and sets the set value of each cooling device as the set temperature. Then, the total power consumption value is monitored again (step 5), and the total power consumption value is compared with the target power value (step 6). If the total used power value is smaller than the target power value, the set temperatures of all the cooling units are reset to values reduced by 1 degree (step 7), and the process returns to step 5, where the total used power value is equal to or more than the target power value. For example, the set temperatures of all the cooling units are reset to the values obtained by raising the temperature by one degree (step 8), and the process returns to step 5.

The specific operation will be described with reference to FIG. In FIG. 10, air conditioners are provided for three rooms A, B, and C, respectively. The current room temperature is 25 degrees, 28 degrees, and 24 degrees, respectively. Air conditioner) set temperature is 22 degrees, 25 degrees, respectively
It is assumed that the angle is set to 22 degrees. In such a state, since the set temperature of the air conditioners is lower than the room temperature of the three rooms, all the air conditioners are in the operating state, that is, in the ON state. In such a state, the flowchart shown in FIG. 9 operates as follows. (1) The power consumption has exceeded the target value. (2) Monitor the room temperature of each of the rooms A to C. Room A = 25 degrees, room B = 28 degrees, room C = 24 degrees is monitored. (3) The minimum room temperature of 24 degrees is set to the set temperature of the air conditioners of the rooms A to C. (4) In room C, room temperature = set temperature, air conditioner is O
It is controlled to 50% operation state in which FF is performed or the room temperature is kept constant. (5) Monitor the power consumption again. (6) If the power consumption exceeds the target value, set the value to 1
Increase the degree (25 degrees). Therefore, the air conditioner in room A is OF
F or controlled to a 50% operating state that keeps the room temperature constant. (7) On the other hand, if the power consumption is lower than the target value, the set value is lowered by one degree (23 degrees). Then, the air conditioner in the room C is turned on or returns to the operation state of 100%. As described above, when the power consumption is lower than the target value, the room temperature setting can be reduced by one degree, and the state before the control can be automatically returned.

Embodiment 9 FIG. In the above-described eighth embodiment, a case has been described in which all loads are set as the cooling units. However, in a system having a cooling unit and a water heater, for example, the control described above is performed on the cooling units, The demand can be controlled by performing the same control for the water heater. That is, the above-described embodiment can be used for controlling a plurality of loads of the same type when there are a plurality of loads of the same type.

Embodiment 10 FIG. In the eighth embodiment, as a method of determining the set value of the constant operation determination factor output to each load, the lowest room temperature among the loads is first set to the set value. A similar effect can be obtained by setting the economic factor set temperature at 28 degrees as the set value of the judgment factor.

When the set value of the constant operation determination factor output to each load is set to the lowest room temperature, at least one load turns off its operation. However, if simply turning off the operation of one load is not effective, it is necessary to turn off the operation of multiple devices by setting the economic setting temperature to 28 degrees as described above. Becomes possible.
For example, in the case as shown in FIG. 10, A, B, C3
Since the room temperature is 28 ° C. or lower in each of the two rooms, if the set value is set at 28 ° C., the operation of the air conditioner is stopped in all the rooms. Therefore, the power consumption decreases at a stretch and falls below the target power value. Thereafter, by increasing the set value once at a time while comparing the current power consumption value with the target power value according to the flowchart, the power consumption value can be gradually brought closer to the target power value. In Embodiment 8 described above, the power consumption is controlled by setting the lowest room temperature for the time being and then raising and lowering the temperature by one degree at a time. There is a case where the effect is not easily obtained if the value is controlled. Therefore, the tenth embodiment has a great feature in that the room temperature is set to a value that can achieve the target power value at a stretch. .

Embodiment 11 FIG. Next, the demand control device shown as the eleventh embodiment has substantially the same configuration as that of the eighth embodiment shown in FIG. 8, except that the setting unit 1 sets only the target power value, and the determination unit 3 determines the operation of each load. A set value to be output from the difference between the current value and the set value of the factor is determined for each type of load, and the control signal output unit 4 outputs a control signal of the set value of the operation determination factor to each load, and a load state control unit. Controls the set value of the driving judgment factor, and the load state detection unit detects the set value of the driving judgment factor.

The determination of the set value of the driving determination factor output to each load is performed as shown in FIG. Here, in order to simplify the explanation, all the loads are assumed to be cooling units, the room temperature is used as an operation determination factor, and the room temperature is set in units of one degree. First, the total power consumption of the load group is monitored (step 1). This is performed by monitoring with the power monitoring unit 2. Then, the total power consumption value is compared with the target power value. If the total power consumption value is within the target power value, the monitoring is continued as it is. If the total power consumption value is exceeded, the room temperature and the set temperature are monitored. 3) Based on the monitoring result, the set temperature of each cooling machine is obtained from the following equation (step 4). (Reset temperature) = (room temperature) −α ｛(room temperature) − (set temperature)｝ (α: constant) ‥‥‥‥ Expression 1 Here, the value of α can be changed continuously, but the explanation here is For simplicity, two-stage adjustment of 0.5 and 0 is possible. For example, when the room temperature detected by the air conditioner 1 is 30 degrees and the set temperature is 20 degrees, if α = 0.5 is used, the set temperature 25 degrees is output to the air conditioner 1. The total used power value is monitored again (step 6), and the total used power value is compared with the target power value (step 7). If the total power consumption value is within the target power value, the monitoring is continued as it is. If the total power consumption value is exceeded, the constant α in Equation 1 is reduced by one step, that is, α = 0.
And the same determination is made (steps 8 to 10).

Embodiment 12 FIG. In the above Example 11, Equation 1 was used as a method for obtaining the reset temperature. (Reset Temperature) = (Room Temperature) −α ｛(Economic Set Temperature) −
(Set temperature)｝ (α: constant) ‥‥‥‥ The same effect can be obtained by using equation (2).

Embodiment 13 FIG. Next, in the demand control device according to the thirteenth embodiment, only the target power value is set by the setting unit 1, and the determination unit 3 determines the difference between the current value and the set value of the operation determination factor of each load for each type of load. The control signal output unit 4 outputs a signal for controlling the difference between the current value and the set value of the operation determination factor to each load, and the load state control unit controls the difference between the current value and the set value of the operation determination factor. The load state detector detects the current value and the set value of the operation determination factor.

The determination of the difference between the current value of the operation determination factor output to each load and the set value is performed as shown in FIG.
Here, in order to simplify the explanation, all the loads are assumed to be cooling units, the room temperature is used as an operation determination factor, and the room temperature is set in units of one degree. First, the total power consumption of the load group is monitored (step 1). This is performed by monitoring from the total power consumption detection unit. Then, the total power consumption value is compared with the target power value. If the total power consumption value is within the target power value, the monitoring is continued as it is. If the total power consumption value is exceeded, the room temperature and the set temperature are monitored. 3) From the monitoring result, the difference between the room temperature and the set temperature of each cooling machine is obtained from the following equation (step 4). (Difference) = α ｛(Room temperature) − (Set temperature)｝ (α: Constant)
‥‥‥‥ Equation 3 Here, the value of α can be changed continuously, but here, for simplicity of explanation, it is assumed that two steps of 0.5 and 0 can be adjusted. For example, when the room temperature detected by the air conditioner 1 is 30 degrees and the set temperature is 20 degrees, if α = 0.5, 5 degrees is output to the air conditioner 1 as a difference between the room temperature and the set temperature. Therefore,
The air conditioner 1 has a set temperature of 25 degrees. The total used power value is monitored again (step 6), and the total used power value is compared with the target power value (step 7). If the total used power value is within the target power value, the monitoring is continued as it is. If the total used power value exceeds, the constant α in Expression 1 is reduced by one step, that is, α = 0 is substituted, and a similar determination is performed. (Steps 8 to 10).

Embodiment 14 FIG. In the above-described embodiment 13, Expression 3 is used as a method of calculating the difference between the room temperature to be output to the load and the set temperature.
(Α: constant) ‥‥‥‥ A similar effect can be obtained by using Equation 4.

Embodiment 15 FIG. Next, as shown in FIG. 13, in the demand control device according to the fifteenth embodiment, the demand controller 100 includes a setting unit 1 for setting a target power value and a power monitoring unit 2 for monitoring the total power consumption value of the load group.
Determining unit 3 for determining the operation state of the electric water heater from the target power value set as above, the predicted total used power value and the used hot water amount
And a control signal output unit 4 for outputting a control signal of the operation state of the electric water heater, a power consumption predicting unit 6 for predicting a future total power consumption value from the monitored total power consumption value, and a remaining hot water amount of each electric water heater. A remaining hot water amount monitoring unit 7 to be monitored and a used hot water amount prediction unit 8 for predicting a future hot water amount to be used from the monitored remaining hot water amount.
The electric water heater comprises state control units M1 to M3 for controlling the operation state and state detection units N1 to N for detecting the remaining hot water amount.
3.

FIG. 1 shows the control of the operation state of the electric water heater.
4 will be described. Here, in order to simplify the explanation, the target electric power value is 2 KW, the electric water heater has a capacity of 60 liters, 1 kW when water is heated, and 0.1 kW when the heat is kept. It takes time. First, the used power prediction unit 6 predicts the total used power value in the next several hours from the total used power value of the load group monitored by the power monitoring unit 2 using chaos theory or the like. Also,
The used hot water amount prediction unit 8 similarly predicts the used hot water amount in the next several hours from the remaining hot water amount monitored by the remaining hot water amount monitoring unit 7. For example, the current remaining hot water amount is assumed to be 20 liters, and the predicted amount of used hot water is estimated to be 20 (liters / hour) × 0.5 (hours) = 10 liters and 1.5 to 2 hours later.
After 5 hours, 40 (liter / hour) × 0.5 (hour) =
Assuming 20 liters, the amount of hot water used will peak
The amount of remaining hot water runs out in the middle of 2.5 hours.

Therefore, after 1.5 hours, the remaining hot water is
Make it 0 liter so that it can withstand the peak of the amount of hot water used. It is 40 (liter) 60 (liter /
Time) = 40 minutes. Therefore, if the electric water heater is operated after 50 minutes, the remaining hot water amount becomes 60 hours after 1.5 hours.
Liters. However, looking at the forecast of power consumption,
After 1 to 1.5 hours, the total used power value exceeds 1 KW, and if 1 KW of used power of the electric water heater is added, it exceeds 2 KW of the target power. Therefore, when the electric water heater is operated after 50 minutes, the power supply to other devices is cut off within 1 to 1.5 hours. Therefore, if the operation start of the electric water heater is advanced by 30 minutes and operated for 20 minutes after 20 minutes, the total power consumption value does not exceed the target power value of 2 KW, and the remaining hot water amount can withstand future use. Become.

Embodiment 16 FIG. Next, as shown in FIG. 15, in the demand control device according to the sixteenth embodiment, the demand controller 100 includes a setting unit 1 for setting a target power value and a power monitoring unit 2 for monitoring the total power consumption value of the load group.
A determining unit 3 for determining an allocated power value to the electric water heater from the set target power value and the predicted total used power value, and a control signal output unit 4 for outputting a control signal of the allocated power value to the electric water heater. The electric water heater comprises a state controller M1 to M3 for controlling the operating state and a state for detecting the remaining hot water amount. Used hot water amount estimating units R1 to N1 for detecting future used hot water amounts from detected hot water amounts based on detection units N1 to N3.
It is composed of state determination units S1 to S3 for determining an operation state from R3, a usable allocated power value, and a predicted amount of used hot water.

Control of operating state of electric water heater FIG. 1
6 will be described. Here, in order to simplify the explanation, the target power value, the electric water heater, the total power value of the load group,
The remaining amount of hot water in the electric water heater will be described under the same conditions as in the fifteenth embodiment. First, in the demand controller 100, the used power prediction unit 6 predicts the total used power value in the next several hours from the total used power value of the load group monitored by the power monitoring unit 2 using chaos theory or the like, and makes a determination. The unit 3 sets the difference between the predicted value and the target power value set by the determination unit 1 as an allocated power value usable by the electric water heater, and the control signal output unit 4 outputs the allocated power value to the electric water heater. Next, in the electric water heater, the used hot water amount prediction units R1 to R3 predict the used hot water amount for the next several hours from the remaining hot water amount monitored by the state detection units N1 to N3, similarly using chaos theory or the like. . The state determination units S1 to S3 make the following determinations. That is, in the current remaining hot water amount, the remaining hot water amount disappears in the middle of 2 to 2.5 hours when the used hot water amount reaches a peak,
If the electric water heater is operated after 50 minutes, the amount of remaining hot water becomes 60 liters after 1.5 hours. However, the prediction of the allocated power value shows that the total power consumption value is 1 after 1 to 1.5 hours.
KW is below the limit, and the electric water heater cannot be operated. Therefore, the operation start of the electric water heater is advanced by 30 minutes, and
If it is operated after a minute, it can be operated for 40 minutes, and the amount of remaining hot water can withstand future use.

Embodiment 17 FIG. In Embodiments 15 and 16, the electric water heater is described as an example. However, the electric water heater is an example of a load controlled by the demand control system, and another load may be used. For example, considering the case where the storage battery is a load, by performing the control described in the above embodiment based on the remaining amount of electricity remaining in the storage battery and the predicted usage amount to be used in the future,
It is possible to control power consumption required for storing electricity in the storage battery.

[0057]

As described above, according to the present invention, in a demand control device and a system for reducing the total power consumption of a load group to a set power value or less, a load control more suitable for situations in a home or a factory. And a demand control device capable of performing the above. In particular, it is demand control without prediction of the total power consumption value of the load group. Further, it is demand control with a fast-acting by grasping the operation state of the load. Further, it is demand control in accordance with the environmental conditions.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a demand control device according to a first embodiment.

FIG. 2 is an explanatory diagram illustrating a procedure for setting an area and shutting off power supply of the demand control device according to the first embodiment.

FIG. 3 is an explanatory diagram illustrating a procedure for setting a region and shutting off power supply of a demand control device according to a second embodiment.

FIG. 4 is a configuration diagram illustrating a demand control device according to a fourth embodiment.

FIG. 5 is an explanatory diagram illustrating a procedure of control determination of a demand control device according to a fourth embodiment.

FIG. 6 is a configuration diagram illustrating a demand control device according to a seventh embodiment.

FIG. 7 is an explanatory diagram showing a procedure for estimating the operating state of a load of a demand control device according to a seventh embodiment.

FIG. 8 is a configuration diagram illustrating a demand control device according to an eighth embodiment.

FIG. 9 is an explanatory diagram showing a procedure for determining a set value of a load operation determination factor of a demand control device in an eighth embodiment.

FIG. 10 is a diagram illustrating a specific example of a set value determination of a load drive determination factor of a demand control device according to an eighth embodiment.

FIG. 11 is an explanatory diagram showing a procedure for determining a set value of a load operation determination factor of a demand control device in an eleventh embodiment.

FIG. 12 is an explanatory diagram illustrating a procedure for determining a difference between a current value and a set value of a load operation determination factor of the demand control device in the twelfth embodiment.

FIG. 13 is a configuration diagram illustrating a demand control device according to a fifteenth embodiment.

FIG. 14 is an explanatory diagram showing control of the operation state of the electric water heater of the demand control device in the fifteenth embodiment.

FIG. 15 is a configuration diagram illustrating a demand control device according to a sixteenth embodiment.

FIG. 16 is an explanatory diagram showing control of the operation state of the electric water heater of the demand control device in the sixteenth embodiment.

[Description of Signs] 1 setting unit 2 power monitoring unit 3 determination unit 4 control signal output unit 5 load state monitoring unit (operation determination factor monitoring unit) 6 used power prediction unit 7 remaining hot water amount monitoring unit 8 used hot water amount prediction unit L1 L3 load M1 to M3 state control unit N1 to N3 state detection unit R1 to R3 used hot water amount prediction unit S1 to S3 state determination unit

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiyasu Hikuma 2-14-40 Ofuna, Kamakura City Mitsubishi Electric Corporation Living System Laboratory (56) References JP-A-51-18838 (JP, A) Hei 3-45125 (JP, A) Fully open sho 59-8243 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02J 3/00-5/00

Claims (7)

(57) [Claims] 1. A demand control device connected to a load group for controlling power supply to a load to reduce the total power consumption of the load group to a set power value or less. and priority setting means for setting by specifying one or more loads and the load priority operating condition of a, the target power value setting means for setting a target power value of the load control by the target power value setting means Set target power value
An area setting means for apportioning the number of priorities set by the priority setting means and creating an area corresponding to the number of priorities based on the apportioned value and a target power value after a lapse of a predetermined time; a power monitor means for monitoring the total power consumption value, a region determination unit for determining whether entered set area total consumption power of the load group by the power monitor means by the <br/> area setting means , based on the determination result of the region determining means, the demand control apparatus characterized by a control signal output means for outputting a control signal for controlling the operating state of the load. 2. A connected to the load group, in order to below power value set the total power consumption of the load group, the demand control apparatus for controlling the operating state of the load, the operating state of each load, 0 Percentage or more can be changed
A plurality of operating condition indicated by the ability of operating capacity, one or more loads and to be controlled from the load group 0
The operating condition of <br/> load also indicated by a large predetermined operating capacity than percent, and priority setting means for setting to prioritize the target power value setting means for setting a target power value of the load control Operating status monitoring means for monitoring the operating status of each load; power monitoring means for monitoring the total power consumption of the load group; and total power consumption by the power monitoring means being the target power by the target power value setting means. If the value exceeds the value, the operating state of each load is monitored by the operating state monitoring means in accordance with the priority set by the priority setting means.
Ri is compared with the operating state of the set load, and determines the control load determiner load for controlling the operating state, on the basis of the determination result of the control load determining means, said priority setting the operating state of the load Of the load set by the means
A demand control device, comprising: control signal output means for outputting a control signal for controlling to change to an operation state . 3. A demand control device connected to a load group and controlling the operation state of the load so as to reduce the total power consumption of the load group to a set power value or less, wherein the operation state of each load is 0. Percentage or more can be changed
A plurality of operating condition indicated by the ability of operating capacity, one or more loads and to be controlled from the load group 0
The operating condition of <br/> load also indicated by a large predetermined operating capacity than percent, and priority setting means for setting selected to prioritize, target power value for setting a target power value of the load control Setting means, operation determination factor monitoring means for monitoring the set value and current value of the operation determination factor for each load, and operation state determination for estimating the operating state of the load from the operation determination factors monitored by the operation determination factor monitoring means Means, a power monitoring means for monitoring a total power consumption value of the load group, and if the total power consumption value by the power monitoring means exceeds the target power value by the target power value setting means, the priority order setting means According to the set priority, the operation state of each load estimated by the operation state determination means and the operation of the load set by the priority setting means
By comparing the states, and determines the control load determiner load for controlling the operating state, on the basis of the determination result of the control load determining means, load the operating state of the load set by the priority setting means
A demand control device, comprising: control signal output means for outputting a control signal for controlling to change to an operation state . 4. A demand control device connected to a load group and controlling the operation state of the load so as to reduce the total power consumption of the load group to a set power value or less. and target power value setting means for, the operation determination factor monitoring means for monitoring the current value of the operation determination factors for each load, a setting value predetermined from the monitored operation determination factors by the operation determination factor monitoring unit for each homologous load Setting value determining means for determining, power monitoring means for monitoring the total power consumption of the load group, and the total power consumption by the power monitoring means being the target power
Control signal output means for outputting a control signal for controlling a set value of a load operation determination factor based on a determination result of the set value determination means when the target power value by the value setting means is exceeded. Features demand control device. 5. A demand control device connected to a load group for controlling an operation state of a load to set a total power consumption of the load group to a set power value or less, wherein a target power value for load control is set. Target power value setting means, operation determination factor monitoring means for monitoring the current value and set value of each load operation determination factor, and current value of each load operation determination factor detected by the operation determination factor monitor means. a setting value determination means for determining the set value for each homologous load based on the difference between the set value, the power monitor means for monitoring the total power consumption of the load group, the total power consumption value by the power monitor means the target power
Control signal output means for outputting a control signal for controlling a set value of a load operation determination factor based on a determination result of the set value determination means when the target power value by the value setting means is exceeded. Features demand control device. 6. A demand control system which is connected to a load group and controls an operation state of a load so as to reduce the total power consumption of the load group to a set power value or less. Target power value setting means, a remaining amount monitoring means for monitoring the state of the remaining amount of the load to be controlled, and a usage amount estimating means for predicting a future usage amount from the remaining amount monitored by the remaining amount monitoring means. A power consumption value predicting means for predicting the total power consumption value from the total power consumption value of the load group to be monitored, and a target power value set by the target power value setting means.
The use and use amount predicted by the use amount prediction means
And determining the operating condition determining means for operating condition of the load from the total power consumption value by the power value predicting means, based on the determination result of the operating condition determining means, the control signal output for outputting a control signal for controlling the operating state of the load has a demand controller and a means, the remaining amount detecting means for detecting the remaining amount of the control target of the load, and operating condition control means for controlling the operating state based on the control signal outputted from said control signal output means A demand control system comprising a load. 7. A demand control system connected to a load group for controlling an operation state of a load in order to reduce a total power consumption of the load group to a set power value or less, wherein a target power value for load control is set. A target power value setting unit that performs prediction of a total power consumption value from the total power consumption value of the monitored load group; and a target power value set by the target power value setting unit.
And determining allocated power value judging means available allocated power value of the load from the total power consumption value predicted by the power consumption value predicting means, based on the determination result of the allocated power value judging means, the load of the allocated power A demand controller having a control signal output unit for outputting a value, a remaining amount detecting unit for detecting a remaining amount of a load to be controlled, and a prediction of a future use amount from the remaining amount detected by the remaining amount detecting unit. wherein the use amount prediction means, and allocated power value output from the control signal output means for performing
Composed of a determining operation state determining means for operating condition from the amount predicted by the usage amount estimation means, based on the determination result of the operating condition determining means, a load having a driving state control means for controlling the operating conditions Demand control system characterized by being performed.