JP4606389B2 - Distributed generator control system - Google Patents

Description

  The present invention relates to a control system for a distributed generator that can be used as a power source during a power failure.

  For distributed generators such as gas cogeneration systems, supply power to the grid power supply (commercial power supply) when the grid power supply is normal, and use it as an emergency power supply to supply power to the disaster prevention load during an emergency power outage There is a regular disaster prevention cogeneration system. Here, the emergency power failure is a power failure of the system power supply due to a disaster such as a fire, and the power failure of the system power supply includes a general power failure due to a typhoon, a lightning strike or an accident. Here, a power outage accompanied by a start signal of a fire alarm or disaster prevention equipment will be referred to as an emergency power outage, and a power outage other than an emergency power outage will be described as a general power outage. Fire hydrants, sprinklers, emergency elevators, digestion pumps, etc. are specified as disaster prevention loads. For example, when a fire occurs, the common disaster prevention cogeneration system supplies electricity to a fire fighting facility (disaster prevention load) for the purpose of initial fire extinguishing.

  For example, when a power failure occurs in a system power supply, a conventional cogeneration system that supports power outages supplies power only to important power loads that are fixedly set in advance, and stops power supply to general power loads. (For example, refer to Patent Document 1). This cogeneration system sets the output of the cogeneration system according to the power demand of the important load when a power failure of the system power supply is predicted, such as when there is a possibility of a lightning strike, and abrupt output fluctuation at the time of the power failure By preventing this, power is stably supplied to the important load.

JP 2005-184890 A

  However, since the cogeneration system described in Patent Document 1 is configured to supply power only to an important power load that is fixedly set in advance at the time of a power failure, there is a surplus in power supply capacity of the distributed generator. Even in this case, there is a problem that power cannot be supplied to other general power loads. Furthermore, in apartment buildings, the power load that should be the target of the important power load that requires power supply differs depending on the time and time zone, and the amount of power required by the important power load changes. There is a possibility that the resident's life may be limited when the power supply of the system power supply is cut off only by supplying power to the important power load set to.

  In addition, even in a cogeneration system that cannot be used as an emergency power source in the event of an emergency power failure, the cogeneration system that can be used as a power source in the event of a power failure supplies power to each power load in an appropriate manner depending on the situation such as time and time zone. There is a demand for a technology that can appropriately perform the above.

  The present invention has been made in view of the above problems, and its purpose is to effectively utilize the power supply capability of the distributed generator at the time of a power outage, and to reduce the decrease in convenience for residents of apartment buildings. It is in the point of providing a control system for a distributed generator.

In order to achieve the above object, a control system for a distributed generator according to the present invention includes a plurality of power generators in the collective housing including one or a plurality of distributed power generators and storage batteries installed in the collective housing so as to be connected to a system power source. A control system for a distributed generator that controls power supply to a power load of the system, and when a power failure occurs in the system power supply, the power failure is an emergency power failure due to a disaster such as a fire or other general power failure A power failure determination means for recognizing whether a general power failure occurs, a power failure period input means for receiving an input of a predicted power failure period of the general power failure, and a unit time for each of the plurality of power loads when the general power failure occurs A predicted power demand input means for receiving an input of predicted power demand, and the distributed generation in the next unit control time for each unit control time obtained by dividing the predicted power failure period when the general power failure occurs. Control means for controlling power supply to the power load based on a total predicted power demand obtained by summing the unit time predicted power demands of all the power loads to be supplied from a machine, the control The means is such that when the total output of the distributed generator and the storage battery in the unit control time is lower than the total predicted power demand, the total predicted power demand is lower than the total output of the distributed generator and the storage battery. In addition, the power load to be supplied from the distributed generator is selected based on a predetermined load selection rule, the output of the distributed generator in the unit control time is less than the total predicted power demand, And, when the total output of the distributed generator and the storage battery exceeds the total predicted power demand, the distributed generator is set to full output operation, and the output of the storage battery is set to the total output Control is performed to follow the difference between the power measurement demand and the output of the distributed generator, and when the output of the distributed generator in the unit control time exceeds the total predicted power demand, The required storage battery output amount of the storage battery is calculated, and when the stored power amount of the storage battery is lower than the required battery output amount, the distributed generator is set to full output operation, and the surplus power of the distributed generator is set. Is stored in the storage battery, and the output of the distributed generator in the unit control time exceeds the total predicted power demand, and when the stored power amount of the storage battery exceeds the required battery output amount, The first feature is that control is performed to cause the output of the distributed generator to follow the power load.

In order to achieve the above object, a control system for a distributed generator according to the present invention includes a plurality of power generators in the collective housing including one or a plurality of distributed power generators and storage batteries installed in the collective housing so as to be connected to a system power source. A power generation determination means for recognizing a power failure of the system power supply and a power failure period input for receiving an input of a predicted power failure period of the power failure when a power failure occurs Means, a predicted power demand input means for receiving an input of predicted power demand by unit time for each of the plurality of power loads when a power failure occurs, and for each unit control time obtained by dividing the predicted power failure period at the time of power failure, Based on the total predicted power demand obtained by totaling the predicted power demand by unit time of all the power loads to be supplied with power from the distributed generator in the unit control time, Control means for controlling power supply to the power load, wherein the control means is configured to calculate the total forecast when a total output of the distributed generator and the storage battery in the unit control time is less than the total forecast power demand. Selecting the power load to be supplied from the distributed generator based on a predetermined load selection rule so that the power demand is less than the total output of the distributed generator and the storage battery, and the unit control time When the output of the distributed generator in the system is less than the total predicted power demand, and the total output of the distributed generator and the storage battery exceeds the total predicted power demand, the distributed generator is operated at full power And setting the output of the storage battery to follow the difference between the total predicted power demand and the output of the distributed generator, and the output of the distributed generator in the unit control time is When the total predicted power demand is exceeded, the required storage battery output amount of the storage battery for the entire predicted power outage period is calculated, and when the stored power amount of the storage battery is less than the required battery output amount, the distributed generator is In the case of setting to full output operation, the surplus power of the distributed generator is stored in the storage battery, and the output of the distributed generator in the unit control time exceeds the total predicted power demand, and the storage battery The second feature is that when the stored power amount exceeds the required battery output amount, control is performed to cause the output of the distributed generator to follow the power load.

According to the first or second aspect of the present invention, in a general power failure, when the total predicted power demand exceeds the power supply capacity of the distributed generator every unit control time, the power supply is dynamically performed. Since the power load to be performed is selected, the power supply capability of the distributed generator can be effectively utilized according to the power demand. More specifically, in an apartment house, the power load to be supplied and the amount of power to be changed vary depending on the time and time zone. By selecting the appropriate power supply target according to the situation, such as the time of day and time, and supplying power to the selected power supply target, it is possible to reduce the decline in convenience for residents in apartment buildings become.

Furthermore, since the storage battery is provided, the storage battery can be effectively used by charging and discharging the storage battery based on the stored power amount and the required battery output amount of the storage battery.

Above any feature control system of a distributed power generator according to the present invention, the load selection rule, the power load applications, the third being a priority set for each type or location And

  According to the present invention having the above characteristics, priority is set for each use, type, or installation location of the power load. For example, priority is given to a power load with high importance such as lighting installed in a common part in an apartment house. By setting the rank higher, it is possible to stably supply power to a power load with high importance, and to appropriately supply power during a power outage.

The control system of the distributed generator according to the present invention having the above characteristics, the priority, the fourth feature that it is set for each time zone.

  According to the present invention having the above characteristics, since the priority order is set for each time zone, it is possible to appropriately cope with a power load whose importance level and required power amount change depending on the time zone. When the priority order is fixed, the power supply is continuously performed on the power load whose necessity for power supply is low. However, by configuring as in the present invention, the power supply It becomes possible to switch the power supply from a power load that has become less necessary to a power load that has a higher need for power supply, and it is possible to further reduce a decrease in convenience for residents of the apartment house.

The distributed generator control system according to the third or fourth aspect of the present invention has a fifth characteristic that the priority is dynamically changed.

  According to the present invention having the above characteristics, since the priority order is dynamically changed, it is possible to appropriately cope with a case where the necessity of power supply dynamically changes. When the priority order is fixed, power supply is always performed for a power load in which the necessity for power supply changes dynamically. It becomes possible to switch the power supply from a power load that has become less necessary to a power load that has a higher need for power supply, and it is possible to further reduce a decrease in convenience for residents of the apartment house.

In the distributed generator control system according to the present invention having any one of the above characteristics, whether or not the control means supplies power for each power load by on / off control of a switch provided for each power load. The sixth feature is to control the above.

  According to the present invention having the above characteristics, power supply is controlled by on / off control of a switch provided for each power load. Therefore, control of power supply can be simplified, and the present invention can be constructed more easily. .

The distributed generator control system according to the present invention having any one of the above characteristics has a seventh characteristic that includes a prediction unit that calculates a predicted power demand per unit time for each of the plurality of power loads.

  According to the present invention having the above characteristics, since the prediction means for predicting the predicted power demand by unit time is provided, the power demand of the power load of the apartment house where the present invention is installed can be appropriately predicted, and the distributed type It becomes possible to appropriately control the generator.

In the control system for a distributed generator according to the present invention having the above characteristics, the predicting unit is configured to record actual data indicating a transition of power demand per unit time for each of the plurality of power loads in the past when the system power supply is normal. Based on this, it is an eighth feature to calculate the predicted power demand by unit time.

  According to the present invention having the above characteristics, the predicted power demand for each unit time is predicted based on past performance data. Therefore, the control of the distributed generator is performed according to the power demand of the power load of the apartment house where the present invention is installed. Can be implemented appropriately.

In the distributed generator control system according to the present invention having the above characteristics, the prediction means is based on property information including at least one of the number of dwelling units, facilities, total floor area, and location conditions of the apartment house, It is a ninth feature that the predicted power demand per unit time is calculated.

  According to the above-described feature of the present invention, since the power demand by unit time is predicted based on the property information such as the number of units, for example, even when the performance data in the apartment is not accumulated, It becomes possible to predict the power demand.

The distributed generator control system according to the present invention having any one of the above features is characterized in that the distributed generator generates power using fuel supplied from the outside, and the generator unit that the cogeneration system comprising a heat recovery device for recovering exhaust heat discharged to the features of the first 0.

  According to the present invention having the above characteristics, since the cogeneration system is controlled as a distributed generator, the present invention can be applied to a cogeneration system used as an emergency power supply or a power supply for power failure. It is possible to make effective use of the power generation capacity.

  Embodiments of a distributed generator control system according to the present invention (hereinafter abbreviated as “the present system 1” as appropriate) will be described below with reference to the drawings.

<First Embodiment>
A first embodiment of the system of the present invention will be described with reference to FIGS. FIG. 1 is a schematic block diagram showing a power supply configuration of the present invention system 1 and an apartment house in which the present invention system 1 is installed. In this embodiment, the generator unit provided in the common disaster prevention gas cogeneration system is assumed as a distributed generator.

As shown in FIG. 1, the apartment house of this embodiment receives the power from the system power supply via the power receiving point 2 by the single-phase transformer 31, the single-phase transformer 32, and the power three-phase transformer 4. The single-phase transformer 32 and the power three-phase transformer 4 are connected to the power receiving point 2 via the switch 5. Power loads L _{1 to} L _N are connected to power three-phase transformer 4 via power meters Wh _{1 to} Wh _N and switches α _{1 to} α _N , and storage battery B is connected to power meter Wh _B and switch α _B. The gas cogeneration system is connected via a power meter Wh _G. The gas cogeneration system includes a generator unit G that generates electric power using fuel supplied from the outside, and an exhaust heat recovery device that recovers exhaust heat discharged from the generator unit G. As the power loads L _{1 to} L _N , power-related power loads L such as an elevator, a water supply pump, a heating pump, and a hot water supply pump installed in a common part of the apartment house are assumed. Power loads L _{N + 1 to} L _M are connected to the single-phase transformer 32 via power meters Wh _{N + 1 to} Wh _M and switches α _{N + 1 to} α _M. As the power loads L _{N + 1 to} L _M, it is assumed that the lighting of the common part, the IT remote controller, the security equipment, the exclusive part (dwelling unit), and the like. In addition, although FIG. 1 illustrates the case where one storage battery B is installed in the apartment house, a plurality of storage batteries B may be installed in the apartment house, for example, installed in each dwelling unit.

  The system 1 of the present invention controls power supply to a plurality of power loads L in an apartment house by a generator unit G and a storage battery B that are installed in the apartment house so as to be connected to a system power supply. As shown in FIG. 1, the system 1 of the present invention includes a power failure determination means 11 that recognizes whether a power failure is an emergency power failure or a general power failure due to a disaster such as a fire when a power failure occurs in a system power supply. A power outage period input means 12 for receiving an input of a predicted power outage period of a general power outage when a general power outage occurs, and a predicted power demand input means for receiving an input of a predicted power demand by unit time for each of the plurality of power loads L when the general power outage occurs 13 and for each unit control time obtained by dividing the predicted power outage period when a general power outage occurs, the predicted power demand by unit time of all the power loads L to be supplied with power from the generator unit G in the next unit control time is calculated. And control means 14 for controlling the power supply to the power load L based on the total estimated power demand.

  The power failure determination means 11 is configured to operate in conjunction with a start signal of a fire alarm or disaster prevention equipment, and when a power failure occurs, an emergency power failure occurs when a start signal of the fire alarm or disaster prevention equipment is transmitted. If it is determined that there is no fire alarm or disaster prevention equipment start signal, it is determined that there is a general power outage.

  The power failure period input means 12 is configured to manually input the predicted power failure period by the operation means of the system 1 of the present invention. For example, the power failure period input means 12 acquires the predicted power failure period based on the operation input by the manager of the apartment house. The predicted power outage period is configured to be classified into a short-term power outage within several hours (for example, within 3 hours), a medium-term power outage less than one day, and a long-term power outage over one day. It should be noted that if a predicted power outage period is not input after a certain time has elapsed since the occurrence of the power outage, it is set to be regarded as a long-term power outage.

  The predicted power demand input means 13 receives an input of predicted power demand by unit time for each power load L when a general power failure occurs. In the present embodiment, the predicted power demand by unit time predicted by the power demand prediction tool installed outside the system 1 of the present invention is acquired.

  When the general power failure occurs, the control means 14 generates the predicted power by unit time of all the power loads L to be supplied with power from the generator unit G in the next unit control time for each unit control time obtained by dividing the predicted power failure period. The power supply to the power load L is controlled based on the total predicted power demand that is the sum of the demands. The unit control time here is, for example, 10 minutes. The control means 14 of this embodiment controls whether or not to supply power for each power load L by on / off control of the switch α provided for each power load L.

  Next, the processing of the system 1 of the present invention will be described with reference to FIG.

  When a power failure occurs and the power failure determination means 11 recognizes that it is a general power failure, the power failure period input means 12 acquires a predicted power failure period (step # 101). Subsequently, the predicted power demand input unit 13 acquires the predicted power demand by unit time for each power load L from the power demand prediction tool (step # 102). Here, FIG. 3 shows the transition of the power demand of the apartment house before and after the occurrence of a general power failure, the output of the generator unit G, and the output of the storage battery B.

  The control means 14 first compares the output of the generator unit G with the predicted power demand per unit time (step # 103), and if the output of the generator unit G is lower than the predicted power demand per unit time (in step # 103) In No branch), the generator unit G is set to full output operation (step # 104). Subsequently, the control means 14 compares the total output of the generator unit G and the storage battery B in the unit control time with the predicted power demand by unit time (step # 105), and the total output of the generator unit G and the storage battery B is the total output. When the predicted power demand is lower (No branch at step # 105, see broken line a in FIG. 3), the power from the generator unit G is set so that the total predicted power demand is lower than the total output of the generator unit G and the storage battery B. The power load L to be supplied is selected based on a predetermined load selection rule (step # 106).

  The control means 14 selects the power load L based on a preset load selection rule. In the present embodiment, the load selection rule is a priority set for each use, type, or installation location of the power load L. Further, the priority order is set so as to dynamically change every time zone (for example, every hour, every 30 minutes, etc.). The control unit 14 selects the power load L in a range in which the total predicted power demand does not exceed the total output of the generator unit G and the storage battery B, in order from the power load L having the highest priority. . In the present embodiment, the load selection rule is configured to change dynamically every time zone, but may be configured to change dynamically every time such as season or month.

  Here, FIG. 4 is a table showing an example of the load selection rule. In FIG. 4, as an electric load L, an elevator in a common area, an IT remote controller for acquiring disaster information and information on a housing complex, etc., lighting in a common area, water supply pump, dwelling unit, security equipment, cogeneration waste heat recovery A heating pump that supplies hot water by the apparatus and a hot water supply pump that supplies hot water by the exhaust heat recovery device of the cogeneration are set. The elevator is set to have a high priority immediately after a power failure, and then set to a priority so that it can be operated with a limited number of uses. . Specifically, for example, it is set to be operable 15 times in 30 minutes. The IT remote control is always set high in priority so that it always operates during a power failure. The priority of nighttime lighting is set high so that the lighting in the common area always operates only at nighttime. The water supply pump is regularly set to have a high priority so as to operate periodically. The water supply pump distributes the domestic water in the water receiving tank to each dwelling unit of the apartment house so that the required minimum living water volume can be supplied to each dwelling unit when the water supply is shut off. If it becomes, the operation is stopped. Each dwelling unit supplies a certain amount of power while limiting the amount of power. The security equipment is prioritized according to the damage situation so that the function is restored according to the damage situation. The heating pump is set so as to supply hot water only in a severe winter season, for example, limited to a meeting room of a shared section. The hot water supply pump is set so as to be operated at a specified time, for example, hot water supply at the time of bathing with respect to the bathing facilities in the common part.

  When the output of the generator unit G falls below the total predicted power demand and the total output of the generator unit G and the storage battery B exceeds the total predicted power demand (Yes in step # 105, FIG. 3). The output of the storage battery B is controlled according to the power demand.

  When the output of the generator unit G in the unit control time exceeds the total predicted power demand (Yes in step # 103), the control unit 14 calculates the necessary storage battery output amount of the storage battery B in the entire predicted power outage period ( Step # 108), the stored power amount of the storage battery B is compared with the required storage battery output amount (step # 109).

  When the stored power amount of the storage battery B is less than the required storage battery output amount in Step # 109 (No branch at Step # 109), the control means 14 sets the generator unit G to full output operation and sets the generator unit. The surplus power of G is stored in the storage battery B (step # 110, see broken line c in FIG. 3).

  When the stored power amount of the storage battery B exceeds the required storage battery output amount (Yes in step # 109), the control means 14 performs control for causing the output of the generator unit G to follow the power load L (step # 111). .

  When a predetermined time, for example, 10 minutes elapses after the execution of steps # 106, # 107, # 110, and # 111, the control means 14 proceeds to step # 103 and outputs the generator unit G in the next unit control time. Compare the predicted power demand by unit time. When the power failure of the system power supply is resolved, the control shifts to the normal control of the system power supply.

Second Embodiment
A second embodiment of the system 1 of the present invention will be described with reference to FIG. The system 1 of the present embodiment is different from the first embodiment in that the storage battery B is not provided.

  Processing of the control means 14 of the system 1 of the present invention in the present embodiment will be described with reference to FIG.

  When a power failure occurs and the power failure determination means 11 recognizes that the power failure is a general power failure, the power failure period input means 12 acquires a predicted power failure period (step # 201). Subsequently, the predicted power demand input unit 13 acquires the predicted power demand by unit time for each power load L from the power demand prediction tool (step # 202).

  First, the control means 14 of the present embodiment compares the output of the generator unit G with the predicted power demand per unit time (step # 203). When the output of the generator unit G is lower than the predicted power demand per unit time (No branch at step # 203), the control means 14 causes the generator unit G so that the total predicted power demand falls below the output of the generator unit G. Is selected based on a predetermined load selection rule (step # 204). Subsequently, the control unit 14 controls the output of the generator unit G according to the total predicted power demand (step # 205).

  When the output of the generator unit G exceeds the total predicted power demand (Yes in step # 203), the control unit 14 controls the output of the generator unit G according to the power demand (step # 206).

  When a predetermined time, for example, 10 minutes elapses after the execution of steps # 205 and # 206, the control means 14 proceeds to step # 203, and the output of the generator unit G and the predicted power per unit time in the next unit control time. Compare demand. When the power failure of the system power supply is resolved, the control shifts to the normal control of the system power supply.

<Third Embodiment>
A third embodiment of the system 1 of the present invention will be described with reference to FIG. The system 1 of the present embodiment of the present embodiment is configured to include a prediction unit 15 that calculates a predicted power demand by unit time for each of the plurality of power loads L in addition to the components of the first or second embodiment. More specifically, in the first and second embodiments, the predicted power demand input unit 13 acquires the predicted power demand by unit time predicted by the power demand prediction tool installed outside the system 1 of the present invention. However, in the present embodiment, a case where the predicted power demand input unit 13 acquires the predicted power demand by unit time predicted by the prediction unit 15 installed in the system 1 of the present invention will be described.

  The predicted power demand input means 13 of this embodiment accepts input of predicted power demand by unit time for each power load L from the prediction means 15 described later when a general power failure occurs.

  The prediction unit 15 calculates the predicted power demand by unit time based on the actual data indicating the transition of the power demand by unit time for each of the past plurality of power loads L when the system power supply is normal. More specifically, a pattern of predicted power demand by unit time for each season and each day of the week (by weekday holiday) is created based on past performance data.

  Furthermore, the predicting means 15 of the present embodiment is configured so that the number of dwelling units in the housing complex is not obtained when the actual data necessary for calculating the predicted power demand per unit time is not accumulated and when the actual data is insufficiently accumulated. Based on property information including information on facilities, total floor area, location conditions, etc., the predicted power demand by unit time is calculated. More specifically, the predicted power demand for each unit time is calculated by applying a parameter relating to the property information to a preset model formula of the predicted power demand.

  Moreover, the prediction means 15 of this embodiment correct | amends the prediction electric power demand according to unit time based on the information from the water level sensor of a receiving tank, an illumination sensor, an external temperature sensor, etc. after a power failure generate | occur | produces. More specifically, when a water outage occurs and the water level in the water receiving tank is below a predetermined minimum water level and the feed water pump is stopped, the power demand related to the feed water pump is excluded from the unit time predicted power demand. Further, when it is recognized from the data from the illumination sensor that the amount of sunlight is less than expected due to rain or the like even during the daytime, it is necessary to turn on the illumination of the common part. In this case, the amount of power required to turn on the lighting of the common unit is added to the predicted power demand by unit time. Furthermore, when the temperature sensor recognizes that the temperature is lower than predicted, for example, it is considered that the power demand due to heating is increased. Therefore, the increase in power demand due to heating is added to the predicted power demand by unit time. In addition, the power demand at the time of a power outage is measured for each power load, the measured value in a predetermined unit time is compared with the value of the predicted power demand by unit time, and the predicted power demand by unit time is corrected based on the comparison result. Do. By comprising in this way, it becomes possible to predict the prediction electric power demand according to unit time with more accuracy.

<Another embodiment>
<1> In each of the embodiments described above, the power source configuration of the apartment building includes a power system such as an elevator, a system to which the storage battery B and the gas cogeneration system are connected, a system to which the dedicated power load L and the like are connected, and a power failure Although the case where the system is sometimes divided into systems that do not supply power from the generator unit G and each system is connected to the system power supply via a transformer has been described, the present invention is not limited to this.

For example, as shown in FIG. 7, the power load L (L ₁ , L ₂ ,...) Is supplied from the system power supply 21 and the power from the generator unit G via different nodes connected in parallel. It is configured to be supplied to. Here, the power supply from the generator unit G to the power load L is controlled by controlling the inverters 41 and 42 provided for each power load L. The inverters 41 and 42 are connected to the generator unit G connected to the gas engine E via the converter 40. In addition, a storage battery B is connected to an input side node of the inverters 41 and 42. Inverter 41 and power load _{L 1} via the switch alpha _11, and are connected via a switch alpha ₁₂ and switches alpha ₁₃ provided in parallel with the switch alpha _11. An intermediate node 43 between the switch α ₁₂ and the switch α ₁₃ is connected to the system power supply 21 via the switch 5. Similarly, the inverter 42 and the power load L ₂ via the switch alpha _21, and are connected via the switches alpha ₂₂ and switches alpha ₂₃ provided in parallel with the switch alpha _21. An intermediate node 43 between the switch α ₂₂ and the switch α ₂₃ is connected to the system power supply 21 via the switch 5. The inverters 41 and 42 and the switch α (α ₁₁ , α ₁₂ , α ₁₃ , α ₂₁ , α ₂₂ , α ₂₃ ,...) Are connected to the control means 14.

FIG. 7 shows the power supply configuration of the system power supply 21 when a power failure occurs. During a power failure, the control means 14, turns on the switch alpha _11, switches alpha ₁₂ and controls to turn off the switch alpha _13, the power load _{L 1} to connect only the inverter 41, the generator unit to the power load _{L 1} G Only power from is supplied. Similarly, during a power failure, the control means 14, turns on the switch alpha _21, and controls the switch off alpha ₂₂ and switch alpha _23, connect only the inverter 42 to power the load _{L 2,} the power generation in the electric power load _{L 2} Only power from the machine unit G is supplied. By comprising in this way, the electric power supply to each electric power load L is controllable only by control of an inverter.

Normal of the system power source 21, control means 14, turns off the switch alpha _11, and controls to turn on the switch alpha ₁₂ and switch alpha _13, and connect the system power supply 21 and the inverter 41 to power the load _{L 1,} the system power supply 21 and supplies power output of the generator unit G to the power load L ₁ and system interconnection. Similarly, when the system power source 21 is normal, the control unit 14 controls the switch α ₂₁ to be turned off and the switch α ₂₂ and the switch α ₂₃ to be turned on to connect the system power source 21 and the inverter 42 to the power load L _2. supplies power to the power load L ₂ the output of the generator unit G and the system power source 21 to the system interconnection.

  <2> In each of the above embodiments, the case of an apartment house provided with one gas cogeneration system (generator unit G) has been described. However, the present invention is not limited to this, and a plurality of generator units G are provided. You may install this invention system 1 in a housing complex. Moreover, you may construct | assemble this invention system 1 using the distributed generator of a power failure response specification which is not combined with a regular disaster prevention. In this case, the power failure determination means 11 is configured to recognize a power failure of the system power supply.

  <3> In the first to third embodiments, the power supply is limited and supplied to each dwelling unit at the time of a power failure. For example, power supply to each dwelling unit at the time of a power outage is You may carry out by providing the electric trunk for power failure used only at the time of a power failure separately from the electric trunk for normal time used at the time of normal.

Specifically, as shown in FIG. 8, in addition to the components of the first embodiment (see FIG. 1), a single-phase transformer 33 is connected to the power receiving point 2 via the switch 5. To supply power to each dwelling unit L _DK (K = 1, 2,...). Each dwelling unit _LDK has a normal electric trunk line that is used when the system power supply is normal, when the system power supply is normal. The wiring Wb and the wiring Wb are connected to the single-phase transformer 33 via the wattmeter Wh _E and the switch α _E.

Each dwelling unit L _DK, important load for supplying power during a power outage and does not supply power to power failure power load distribution board D _K receiving power from wire Wb during normal system power _source, and, a power failure of the system power source breaker BR _K is installed to at receive power from the wiring Wa. Panelboard D _K is provided with a main breaker and the branch breakers, wire Wb are connected to the master breaker.
Breaker BR _K, during a power failure, so as to feed a predetermined amount of power to a predetermined critical load, is set rated power. The predetermined power amount is set based on, for example, a value obtained by dividing the power generation amount of the generator unit G by the total number of dwelling units. Critical load is connected to one of the branch breakers and breaker BR _K distribution board D _K via the switch alpha _DK. Power load is connected to the branch breaker panelboard D _K.

During a power failure of the system power source is changed over to select the wire Wa switches alpha _E, switches the switch alpha _DK to select the breaker BR _K. Furthermore, when normal system power source switches the switch alpha _E to select the wire Wb, it switched so as to select the distribution board D _K switches alpha _DK. By switching the switch α _E and the switch α _DK in this way, for the important load of each dwelling unit L _DK at the time of power failure of the system power supply, for the important load and power load of each dwelling unit L _DK when the system power supply is normal Power supply can be performed.

  <4> In each of the above embodiments, the case where the present invention is applied to a common disaster prevention cogeneration system that supplies power to a disaster prevention load at the time of an emergency power failure has been described. The present invention may be applied to a cogeneration system. More specifically, in the case of a power outage specification cogeneration system, the power outage determination means 11 in FIG. 1 is configured to determine the occurrence of a power outage of the system power supply. The same control as that described above is performed.

  <5> In each of the above embodiments, a case has been described in which a common disaster prevention cogeneration system that supplies power to a disaster prevention load at the time of an emergency power failure is selected, and a power load that is a power supply target at the time of a general power failure is selected. The common disaster prevention cogeneration system may be configured so that the power load to be supplied with power can be added to the disaster prevention load even in the event of an emergency power failure. For example, in a common disaster prevention cogeneration system, if the power generation capacity is larger than the disaster prevention load capacity and there is surplus capacity, the surplus power generation that subtracts the disaster prevention load capacity from the power generation capacity when receiving a start signal of a fire alarm or disaster prevention equipment For the capacity (in the case of a cogeneration system including a storage battery, surplus power generation capacity and storage battery output), the same control as in the case of the general power failure in each of the above embodiments may be performed.

The schematic block diagram which shows schematic structure in 1st Embodiment of the control system of the distributed generator which concerns on this invention, and its peripheral equipment. The flowchart which shows the operation | movement in 1st Embodiment of the control system of the distributed generator which concerns on this invention. Explanatory drawing which shows the relationship between the output of a distributed generator in 1st Embodiment of the control system of the distributed generator which concerns on this invention, and transition of an electric power demand Table showing an example of priority setting of power loads in a distributed generator control system according to the present invention The flowchart which shows the operation | movement in 2nd Embodiment of the control system of the distributed generator which concerns on this invention. The schematic block diagram which shows schematic structure in 3rd Embodiment of the control system of the distributed generator which concerns on this invention, and its peripheral equipment. The schematic block diagram which shows schematic structure in another embodiment of the control system of the distributed generator which concerns on this invention, and its peripheral equipment. The schematic block diagram which shows schematic structure in another embodiment of the control system of the distributed generator which concerns on this invention, and its peripheral equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control system of the distributed generator which concerns on this invention 2 Power receiving point 3 Single phase transformer 4 Power three phase transformer 5 Switch 11 Power failure determination means 12 Power failure period input means 13 Predictive power demand input means 14 Control means 15 Predictive means 21 System power supply 31 Single-phase transformer 32 Single-phase transformer 33 Single-phase transformer 40 Converter 41 Inverter 42 Inverter 43 Node B Storage battery BR Breaker D Distribution board E Gas engine G Generator unit L Power load Wh Power meter Wa Wiring Wb Wiring α switch

Claims (10)

A distributed generator control system for controlling power supply to a plurality of power loads in the apartment house by one or a plurality of distributed generators and a storage battery installed in an apartment house so as to be connected to a system power source,
When a power failure occurs in the system power supply, a power failure determination means for recognizing whether the power failure is an emergency power failure due to a disaster such as a fire or other general power failure,
When the general power failure occurs, a power failure period input means for receiving an input of the predicted power failure period of the general power failure;
Predicted power demand input means for receiving input of predicted power demand by unit time for each of the plurality of power loads when the general power failure occurs,
For each unit control time obtained by dividing the predicted power outage period when the general power outage occurs, the predicted power per unit time of all the power loads to be supplied with power from the distributed generator in the next unit control time Control means for controlling the power supply to the power load based on the total predicted power demand obtained by summing the demands,
The control means, when the total output of the distributed generator and the storage battery in the unit control time is less than the total predicted power demand, the total predicted power demand is the total output of the distributed generator and the storage battery. To select the power load to be supplied from the distributed generator based on a predetermined load selection rule,
When the output of the distributed generator in the unit control time is less than the total predicted power demand, and the total output of the distributed generator and the storage battery exceeds the total predicted power demand, the distributed generator Is set to full output operation, the output of the storage battery is controlled to follow the difference between the total predicted power demand and the output of the distributed generator,
When the output of the distributed generator in the unit control time exceeds the total predicted power demand, the required storage battery output amount of the storage battery in the entire predicted power outage period is calculated, and the stored power amount of the storage battery is the required power When the battery output amount is lower, the distributed generator is set to full output operation, and the surplus power of the distributed generator is stored in the storage battery,
When the output of the distributed generator in the unit control time exceeds the total predicted power demand, and the stored power amount of the storage battery exceeds the required battery output amount, the output of the distributed generator is A control system for a distributed generator, which performs control to follow the power load. A distributed generator control system for controlling power supply to a plurality of power loads in the apartment house by one or a plurality of distributed generators and a storage battery installed in an apartment house so as to be connected to a system power source,
A power failure determination means for recognizing a power failure of the system power supply,
A power failure period input means for receiving an input of a predicted power failure period of the power failure when a power failure occurs
Predictive power demand input means for receiving input of predicted power demand by unit time for each of the plurality of power loads when a power failure occurs,
For each unit control time obtained by dividing the predicted power outage period when a power outage occurs, the predicted power demand by unit time of all the power loads to be supplied with power from the distributed generator in the next unit control time is calculated. Control means for controlling power supply to the power load based on the total estimated power demand,
The control means, when the total output of the distributed generator and the storage battery in the unit control time is less than the total predicted power demand, the total predicted power demand is the total output of the distributed generator and the storage battery. To select the power load to be supplied from the distributed generator based on a predetermined load selection rule,
When the output of the distributed generator in the unit control time is less than the total predicted power demand, and the total output of the distributed generator and the storage battery exceeds the total predicted power demand, the distributed generator Is set to full output operation, the output of the storage battery is controlled to follow the difference between the total predicted power demand and the output of the distributed generator,
When the output of the distributed generator in the unit control time exceeds the total predicted power demand, the required storage battery output amount of the storage battery in the entire predicted power outage period is calculated, and the stored power amount of the storage battery is the required power When the battery output amount is lower, the distributed generator is set to full output operation, and the surplus power of the distributed generator is stored in the storage battery,
When the output of the distributed generator in the unit control time exceeds the total predicted power demand, and the stored power amount of the storage battery exceeds the required battery output amount, the output of the distributed generator is A control system for a distributed generator, which performs control to follow the power load. 3. The distributed generator control system according to claim 1, wherein the load selection rule is a priority set for each use, type, or installation location of the power load. 4. 4. The distributed generator control system according to claim 3 , wherein the priority order is set for each time period or time zone. The priority control system of the distributed generator according to claim 3 or 4, wherein the dynamically changing. Wherein the control means, the on-off control of the switches provided for each of the power load, to any one of claim 1 to 5, characterized in that to control whether or not to perform power supply to each of the power load The distributed generator control system as described. The distributed generator control system according to any one of claims 1 to 6 , further comprising a prediction unit that calculates a predicted power demand per unit time for each of the plurality of power loads. The prediction means calculates the predicted power demand per unit time based on actual data indicating a transition of power demand per unit time for each of the plurality of power loads in the past when the system power supply is normal. A control system for a distributed generator according to claim 7 . The said prediction means calculates the said prediction electric power demand according to unit time based on the property information containing at least any one of the number of dwelling units of the said collective housing, an installation, a total floor area, and location conditions. Item 9. The distributed generator control system according to Item 7 or 8 . The distributed generator is a cogeneration system including a generator unit that generates electric power using fuel supplied from the outside, and an exhaust heat recovery device that recovers exhaust heat discharged from the generator unit. the control system of the distributed power generator according to any one of claim 1 to 9, characterized in that.