JP6890941B2 - Power supply system - Google Patents

Description

The present invention relates to a technique for a power supply system having a storage battery.

Conventionally, the technology of a power supply system having a storage battery has been known. For example, as described in Patent Document 1. Patent Document 1 describes a technique for suppressing electricity charges by controlling charging of a storage battery (power storage device) at midnight.

In addition to the techniques described in Patent Document 1, for example, when the required power from the power load is large, the storage battery is discharged and the power from the storage battery is supplied to the power load to obtain a demand value (maximum demand power). It is also possible to curb electricity charges.

As described above, there are a plurality of known control methods for storage batteries that allow consumers to obtain various benefits. However, a technique for effectively combining these plurality of control methods has not been known so far.

Japanese Unexamined Patent Publication No. 2012-130149

The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a power supply system capable of more effectively obtaining profits by combining a plurality of control methods of storage batteries. To provide.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

That is, claim 1 includes a storage battery that is possessed by each of the plurality of consumers and can supply power to the power load of the plurality of consumers, and a control device that can control the operation of the storage battery. In the power supply system, the control device controls the charge / discharge of the storage battery in order to suppress the voltage fluctuation of the plurality of consumers as a whole, and the demand value of the plurality of consumers as a whole. A second control for discharging the storage battery to suppress it, a third control for discharging the storage battery owned by the customer to suppress the demand value of one of the consumers, and an electric power charge In a relatively expensive time zone, the storage battery owned by the customer is discharged according to the power load of one of the consumers, and in a time zone when the power charge is relatively low, the power from the commercial power source is used. In the fourth control of charging the storage battery and the time zone when the power charge is relatively expensive, the storage battery is discharged according to the power load of the entire plurality of consumers, and the power charge is relatively low. in strip, of the battery in order to relax the fifth and control for charging the battery power, the imbalance of the entire plurality of customers in accordance with the plural customers overall power load from the commercial power source It is possible to execute at least two or more of the sixth control that controls charging and discharging, and it is necessary to prioritize the feasible control and charge or discharge based on the high-priority control. If it is not necessary to charge and discharge, it is judged whether or not it is necessary to charge or discharge based on the control of the next priority, and charge or discharge is performed. It selects the controls that need to be performed and executes the selected controls.

In claim 2, the first control and the second control have a higher priority than the third control, the fourth control, the fifth control, and the sixth control. It is set to.

In claim 3, the fifth control and the sixth control have a lower priority than the first control, the second control, the third control, and the fourth control. It is set to.

In claim 4, when the control device executes the first control and the second control, if the storage battery can be discharged , the control device causes the storage battery to discharge regardless of the charge rate of the storage battery. It is a thing.

In claim 5, when the control device executes the third control, the fourth control, the fifth control, and the sixth control, the storage battery has a charge rate equal to or higher than a predetermined threshold value. Only discharge.

In claim 6, the predetermined threshold value is set to be smaller as the priority is higher among the third control, the fourth control, the fifth control, and the sixth control. It is set.

As the effect of the present invention, the following effects are exhibited.

In claim 1, a profit can be obtained more effectively by combining a plurality of control methods of the storage battery.

In claim 2, control that is considered to be of high importance can be preferentially executed.

In claim 3, other controls can be executed with priority over the controls considered to be less important.

In claim 4, the control considered to be of high importance can be executed regardless of the charge rate of the storage battery.

In claim 5, the control considered to be of low importance can be executed while ensuring a certain amount of charge in the storage battery.

In claim 6, control can be executed more appropriately.

Schematic diagram of the power supply system and the condominium to which the power supply system is applied. A block diagram showing a configuration for controlling a power supply system. The flowchart which showed the control by the control device (the first control and the second control). The flowchart which showed the control by the control device (the third control and the fourth control). The flowchart which showed the control by the control device (the fifth control and the sixth control).

Hereinafter, the power supply system 10 according to the embodiment of the present invention will be described.

First, with reference to FIG. 1, the outline of the condominium 1 to which the power supply system 10 is applied will be described.

The condominium 1 according to the present embodiment has a plurality of dwelling units 2. FIG. 1 shows 5 dwelling units 2 as an example. Further, the condominium 1 has a storage battery room 3 for accommodating the storage battery 30 described later, in addition to the dwelling unit 2.

It is assumed that the condominium 1 according to the present embodiment is energy-managed by a predetermined business operator (aggregator). That is, the aggregator performs high-voltage batch power reception and supplies the power to each dwelling unit 2 (customer) to perform batch energy management.

Next, the configuration of the power supply system 10 will be described with reference to FIGS. 1 and 2.

The electric power supply system 10 appropriately supplies electric power to each dwelling unit 2 of the condominium 1. The power supply system 10 mainly includes a load device 20, a storage battery 30, a transformer 40, a first sensor 50, a second sensor 60, a third sensor 70, and a control device 80.

The load device 20 is an electric product (electric power load) that is provided in each dwelling unit 2 and consumes electric power.

The storage battery 30 is capable of charging and discharging electric power. A plurality of storage batteries 30 are provided, and each dwelling unit 2 is owned by a resident. The plurality of storage batteries 30 are housed in the storage battery chamber 3 of the condominium 1.

The transformer 40 appropriately transforms the voltage from the commercial power source S of the electric power company. The transformer 40 is arranged in an appropriate space of the condominium 1 (for example, a transformer room for accommodating the transformer 40).

The transformer 40 is connected to the commercial power supply S by a distribution line. Further, the transformer 40 is connected to the load device 20 of each dwelling unit 2 by a distribution line. Further, each storage battery 30 is connected on the primary side (commercial power supply S side) of the distribution line that supplies electric power to each dwelling unit 2. By arranging the storage battery 30 in this way, the charge / discharge power of the storage battery 30 can be accommodated in the entire condominium 1 (each dwelling unit 2).

In the present embodiment, basically, the electric power (discharge amount) discharged by each storage battery 30 is controlled so as not to exceed the electric power load (electric power demand) of the consumer (dwelling unit 2) who owns the storage battery 30. Will be done. By suppressing the discharge amount of each storage battery 30 according to the power load of each dwelling unit 2 in this way, it is possible to eliminate the bias of the storage battery 30 to be discharged and suppress the difference in the life of the storage battery 30. Can be done. As a result, it is possible to eliminate the feeling of unfairness among consumers while accommodating electric power in the entire condominium 1.

The first sensor 50 can detect electric power. The first sensor 50 is provided on the commercial power supply S side of the transformer 40. The power procured by the aggregator can be detected by the first sensor 50 provided at the location.

The second sensor 60 is capable of detecting voltage and power. The second sensor 60 is provided on the load device 20 (storage battery 30) side of the transformer 40. The voltage at the end of the transformer 40 (transformer chamber) can be detected by the second sensor 60 provided at the location. Further, the second sensor 60 can detect the power load of the entire condominium.

The third sensor 70 is capable of detecting electric power. The third sensor 70 is provided on each distribution line that draws electric power into the load device 20 of each dwelling unit 2. The power load of each dwelling unit 2 can be detected by the third sensor 70 provided at the location.

The control device 80 shown in FIG. 2 controls each part of the power supply system 10. The control device 80 is mainly composed of an arithmetic processing unit such as a CPU, a storage device such as a RAM or a ROM, and the like. The control device 80 stores in advance various information, programs, and the like for controlling the operation of the power supply system 10.

The control device 80 is connected to the first sensor 50, the second sensor 60, and the third sensor 70, and can receive the detection result by the first sensor 50 and the like.

The control device 80 is connected to the storage battery 30 and can control the charging and discharging of each storage battery 30. In addition, the control device 80 can acquire various information (SOC (charging rate), etc.) regarding the storage battery 30.

The contents of the control executed by the control device 80 will be described below.

The control device 80 can mainly execute six controls (from the first control to the sixth control) regarding the storage battery 30. In the following, first, an outline of each of the six controls will be described.

First, the first control will be described. The first control is a control for suppressing voltage fluctuations. If the voltage fluctuates significantly in the condominium 1 and deviates from the reference value (101 ± 6 (V)), it may cause flickering of lighting, malfunction of precision equipment (personal computer, etc.), power failure, and the like. Such voltage fluctuations can occur, for example, when sudden fluctuations in power demand (use of a dryer or IH, etc.) occur in a specific dwelling unit 2 (customer), or when power demand more than expected occurs.

On the other hand, in the first control, the voltage fluctuation can be suppressed by controlling the charging / discharging of the storage battery 30. That is, in response to fluctuations in electric power demand, the fluctuations are mitigated by charging and discharging the storage battery 30. Further, when the electric power demand exceeds the assumption, the electric power load is reduced by discharging the storage battery 30.

Specifically, the control device 80 issues a charge / discharge instruction to the total storage battery 30 according to the voltage detected by the second sensor 60. For example, when the voltage detected by the second sensor 60 is less than 96 (V), the control device 80 discharges the total storage battery 30. Further, the control device 80 charges the total storage battery 30 when the voltage detected by the second sensor 60 is 106 (V) or more. Thereby, the voltage fluctuation can be suppressed so that the voltage does not deviate from the reference value (101 ± 6 (V)).

Next, the second control will be described. The second control is a control for suppressing the demand value (maximum demand power) of the entire condominium 1. When the electric power demand of each dwelling unit 2 becomes large, the demand value which is the electric power load of the entire condominium 1 may temporarily increase. When the aggregator receives high-voltage batch power as in the present embodiment, the basic usage amount of the electricity charge is determined based on the demand value of the entire condominium 1. Therefore, when the demand value rises, the electric power charge of the aggregator rises, and eventually the electric power charge unit price of each dwelling unit 2 also rises.

On the other hand, in the second control, by discharging from the storage battery 30, it is possible to suppress the demand value of the entire condominium 1 and reduce the electric power charge (prevent the soaring price).

Specifically, the control device 80 issues a discharge instruction to the total storage battery 30 according to the electric power detected by the second sensor 60 (the electric power load of the entire condominium 1). For example, the control device 80 discharges the total storage battery 30 when the power load of the entire condominium 1 becomes 50 kW or more. As a result, the demand value can be suppressed.

Next, the third control will be described. The third control is a control for suppressing the demand value of each dwelling unit 2. When the electric power demand of each dwelling unit 2 becomes large and the demand value of each dwelling unit 2 rises, the electric power charge of each dwelling unit 2 becomes high.

On the other hand, in the third control, the demand value of each dwelling unit 2 can be suppressed and the electric power charge can be reduced by discharging from the storage battery 30 owned by each dwelling unit 2.

Specifically, the control device 80 issues a discharge instruction to the corresponding storage battery 30 of each dwelling unit 2 according to the electric power detected by the third sensor 70 (power load of each dwelling unit 2). For example, when the power load of a certain dwelling unit 2 becomes 5 kW or more, the control device 80 discharges the storage battery 30 owned by the dwelling unit 2. As a result, the demand value can be suppressed.

Next, the fourth control will be described. The fourth control is a control for performing a time shift of each dwelling unit 2. If the power load increases during a time period (daytime, etc.) when the unit price of electricity is high in each dwelling unit 2, the electricity charge will increase accordingly.

On the other hand, in the fourth control, the storage battery 30 is charged during a time when the unit price of electricity is relatively cheap (cheap), and discharged from the storage battery 30 during a time when the unit price of electricity is relatively expensive (expensive). By doing this, it is possible to reduce the electricity bill.

Specifically, the control device 80 issues a charge / discharge instruction to each storage battery 30 according to the time zone. For example, the control device 80 charges the storage battery 30 at midnight when the unit price of electric power is cheap. Further, the control device 80 uses the storage battery 30 according to the power load of each dwelling unit 2 (power detected by the third sensor 70) during a time period when the unit price of the power charge is high (particularly, during a peak time period when the power load is large). Discharge. As a result, electricity charges can be reduced.

Next, the fifth control will be described. The fifth control is a control for shifting the time of the entire condominium 1. If the power load increases during the time when the unit price of electricity is high in the entire condominium 1, the electricity charge will increase accordingly.

On the other hand, in the fifth control, the storage battery 30 is charged during a time when the unit price of electricity is relatively cheap (cheap), and discharged from the storage battery 30 during a time when the unit price of electricity is relatively expensive (expensive). By doing this, it is possible to reduce the electricity bill.

Specifically, the control device 80 issues a charge / discharge instruction to each storage battery 30 according to the time zone. For example, the control device 80 charges the storage battery 30 at midnight when the unit price of electric power is cheap. Further, the control device 80 uses the storage battery 30 according to the power load of the entire condominium 1 (power detected by the second sensor 60) during a time period when the unit price of the power charge is high (particularly during a peak time period when the power load is large). Discharge. As a result, electricity charges can be reduced.

The fourth control and the fifth control are both controls related to time shift, but the time zone of the power charge unit price of each dwelling unit 2 and the time zone of the power charge unit price of the entire condominium 1 may be different. Therefore, separate controls (fourth control and fifth control) are performed.

Next, the sixth control will be described. The sixth control is a control for adjusting the imbalance (imbalance between the power load and the procured power) of the entire condominium 1. If there is a large difference (imbalance) between the power load of the entire condominium 1 and the procured power, the aggregator will have to pay an imbalance fee (power generation fee within the fluctuation range (outside)), and the rate of return will deteriorate. In addition, the deterioration of the rate of return is reflected in the unit price of electricity for each dwelling unit 2, that is, the unit price of electricity may be raised.

On the other hand, in the sixth control, the imbalance can be alleviated by charging and discharging the storage battery 30 when the imbalance occurs.

Specifically, the control device 80 issues a charge / discharge instruction to the storage battery 30 of each dwelling unit 2 according to the electric power detected by the first sensor 50 and the second sensor 60. For example, when the power load of the entire condominium 1 (power detected by the second sensor 60) is larger than the power detected by the first sensor 50 (procured power), the control device 80 discharges each storage battery 30. Further, when the power load of the entire condominium 1 is smaller than the procured power, the control device 80 charges each storage battery 30. As a result, the imbalance can be alleviated.

The above six controls are prioritized, and the control device 80 preferentially executes the control having a higher priority. In the present embodiment, the priority is set higher in the order of the first control, the second control, the third control, the fourth control, the fifth control, and the sixth control.

Here, the first control is relatively important because voltage fluctuations can cause equipment malfunctions and power outages. In addition, since an increase in the demand value of the entire condominium 1 leads to a rise in the power charge of the aggregator (and by extension, a rise in the power charge of each dwelling unit 2), the importance of the second control is relatively high. Therefore, in the present embodiment, the priority of the first control and the second control is set high.

On the other hand, the time shift of the entire condominium 1 can be replaced to some extent by the time shift of each dwelling unit 2 (fourth control), so that the fifth control is relatively less important. Further, since it is considered that the imbalance adjustment of the entire condominium 1 is less necessary, the importance of the sixth control is also relatively low. Therefore, in the present embodiment, the priority of the fifth control and the sixth control is set low.

Hereinafter, a specific method (control method) for performing the above six controls based on the priority order will be described.

As shown in FIG. 3, first, the control device 80 executes the first control (step S101 to step S103).

Specifically, in step S101, the control device 80 determines the value of the voltage (received voltage) detected by the second sensor 60.
When the received voltage is less than 97 (V), the control device 80 proceeds to step S102.
Further, when the received voltage is 106 (V) or more, the control device 80 shifts to step S103.
Further, when the received voltage is 97 (V) or more and less than 106V, the control device 80 shifts to step S201 (second control).
The values of 97 (V) and 106 (V), which are the criteria for determination, are values set with a slight margin with respect to the reference value (101 ± 6 (V)).

In step S102, the control device 80 discharges the total storage battery 30. As a result, the received voltage can be increased and the voltage can be prevented from deviating from the reference value (101 ± 6 (V)). In this case, the control device 80 controls so that the same amount of electric power is discharged from the total storage battery 30 so that the amount of discharge is not biased.

As described above, in the present embodiment, basically, the discharge amount of each storage battery 30 is controlled (restricted) so as not to exceed the power load of the consumer (dwelling unit 2) who owns the storage battery 30. However, in step S102, the limitation is removed so that the battery can be discharged even in a range exceeding the power load. This is because the first control (suppression of voltage fluctuation) is very important. However, the discharge amount of the entire storage battery 30 is limited to a range that does not exceed the electric power demand of the entire condominium 1.

In step S103, the control device 80 charges the total storage battery 30. As a result, the received voltage can be reduced and the voltage can be prevented from deviating from the reference value (101 ± 6 (V)).

Next, the control device 80 executes the second control (step S201 and step S202).

Specifically, in step S201 shifted from step S101, the control device 80 determines the value of the electric power (electric power demand (demand) of the entire condominium 1) detected by the second sensor 60.
The control device 80 proceeds to step S202 when the power demand (power load) of the entire condominium 1 is 90% or more of the set demand value.
Further, when the power demand (power load) of the entire condominium 1 is less than 90% of the set demand value, the control device 80 shifts to step S301 (third control).

In step S202, the control device 80 discharges the total storage battery 30. As a result, it is possible to suppress an increase in the demand value of the entire condominium 1. In this case, the control device 80 controls so that the same amount of electric power is discharged from the total storage battery 30 so that the amount of discharge is not biased. Further, the control device 80 controls so that the amount of discharge from the total storage battery 30 is 10% of the set demand value (for example, if the demand value is 50 (kW), it is 5 (kW)).

In step S202, as in the first control (step S102), the limit on the amount of discharge of each storage battery 30 is removed. This is because the second control (suppression of the demand value) is very important. Further, in step S202, as in the first control (step S102), the discharge amount of the entire storage battery 30 is limited to a range that does not exceed the power demand of the entire condominium 1.

Next, the control device 80 executes the third control (step S301 to step S303) shown in FIG. The third control is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

Specifically, in step S301 shifted from step S201, the control device 80 determines the value of the electric power (electric power demand (demand) of the dwelling unit 2) detected by the third sensor 70.
When the power demand (power load) of the dwelling unit 2 is 90% or more of the set demand value, the control device 80 proceeds to step S302.
Further, when the power demand (power load) of the dwelling unit 2 is less than 90% of the set demand value, the control device 80 shifts to step S401 (fourth control).

In step S302, the control device 80 determines the value of the SOC (charge rate) of the storage battery 30 owned by the dwelling unit 2.
When the SOC of the storage battery 30 is 30% or more, the control device 80 shifts to step S303.
Further, when the SOC of the storage battery 30 is less than 30%, the control device 80 shifts to step S401 (fourth control).

In step S303, the control device 80 discharges the storage battery 30. As a result, it is possible to suppress an increase in the demand value of the dwelling unit 2. In this case, the control device 80 controls so that the amount of discharge from the storage battery 30 is 10% of the set demand value.

In this way, the control device 80 executes the third control for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 30% or more, it is possible to secure the minimum power (30% or more) in the storage battery 30 and prepare for an emergency (such as when a power failure occurs). it can.

Next, the control device 80 executes the fourth control (step S401 to step S405). The fourth control is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

Specifically, in step S301 or step S401 shifted from step S302, the control device 80 determines the power charge unit price of the dwelling unit 2 at the current time. In order to make the determination, the control device 80 has acquired in advance the electric power charge table (data indicating the electric power charge unit price for each time zone) of the dwelling unit 2.
When the unit price of electricity for the dwelling unit 2 is relatively low (for example, during the time zone when midnight electricity is applied), the control device 80 shifts to step S402.
Further, when the electric power charge unit price of the dwelling unit 2 is relatively expensive (for example, it is the time zone in which the electric power charge unit price is set to be the highest in the day), the control device 80 proceeds to step S404. ..
Further, when the electric power charge unit price of the dwelling unit 2 is neither cheap nor expensive, the control device 80 shifts to step S501 (fifth control).

In step S402, the control device 80 determines the high or low priority of charging among the storage batteries 30 (the storage batteries 30 of the dwelling unit 2 for which the unit price of electric power is determined to be low). Here, in the control device 80, among the storage batteries 30, the charging priority is set to be higher in order from the one having the lowest SOC.

The control device 80 proceeds to step S403 after performing the process of step S402.

In step S403, the control device 80 charges each storage battery 30. At this time, the control device 80 preferentially (in order) charges the storage battery 30 having the highest charging priority in step S402.

As described above, if the total storage batteries 30 are charged at the same time, inconvenience may occur (for example, voltage fluctuations and an increase in the demand value of the entire condominium 1 may occur). Therefore, in the present embodiment, charging is performed. The storage battery 30 is charged according to the priority.

On the other hand, in step S404 shifted from step S401, the control device 80 determines the SOC value of the storage battery 30 (the storage battery 30 of the dwelling unit 2 whose power charge unit price is determined to be expensive).
When the SOC of the storage battery 30 is 40% or more, the control device 80 shifts to step S405.
Further, when the SOC of the storage battery 30 is less than 40%, the control device 80 shifts to step S501 (fifth control).

In step S405, the control device 80 discharges the storage battery 30. By supplying the electric power from the storage battery 30 to each dwelling unit 2, the electric power charge can be reduced. The discharge amount of the storage battery 30 at this time is controlled so as not to exceed the power demand (power load) of the dwelling unit 2 that owns the storage battery 30.

In this way, the control device 80 executes the fourth control for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 40% or more, it is possible to secure a certain amount of power (40% or more) in the storage battery 30 and prepare for an emergency (such as when a power failure occurs). .. Further, since the fourth control has a lower priority (importance) than the third control, the threshold value (40% (see step S404)) when discharging the storage battery 30 in the fourth control is the third. It is set higher than the threshold value (30% (see step S303)) when discharging the storage battery 30 in the control of. That is, in the fourth control having a relatively low importance, the storage battery 30 is set to be less likely to be discharged than in the third control having a relatively high importance.

Next, the control device 80 executes the fifth control (step S501 to step S503) shown in FIG. The fifth control (particularly, the processes of steps S502 and S503 described later) is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

In step S501 shifted from step S401 or step S404, the control device 80 determines the electric power charge unit price of the entire condominium 1 (that is, the aggregator) at the current time. In order to make the determination, the control device 80 has previously acquired the power charge table of the aggregator (data indicating the unit price of the power charge for each time zone).
When the electric power charge unit price of the entire condominium 1 is relatively expensive (for example, it is the time zone in which the electric power charge unit price is set to be the highest in the day), the control device 80 proceeds to step S502.
Further, when the electric power charge unit price of the dwelling unit 2 is not expensive, the control device 80 shifts to step S601 (sixth control).

In step S502, the control device 80 determines the SOC value of the storage battery 30 (the storage battery 30 of the dwelling unit 2 whose power charge unit price is determined to be expensive).
When the SOC of the storage battery 30 is 80% or more, the control device 80 shifts to step S503.
Further, when the SOC of the storage battery 30 is less than 80%, the control device 80 shifts to step S601 (sixth control).

In step S503, the control device 80 discharges the storage battery 30. By supplying the electric power from the storage battery 30 to each dwelling unit 2, the electric power charge can be reduced. The total discharge amount of the storage battery 30 at this time is controlled so as not to exceed the electric power demand (electric power load) of the entire condominium 1.

In this way, the control device 80 executes the fifth control (step S502 and step S503) for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 80% or more, it is possible to secure a certain amount of power (80% or more) in the storage battery 30 and prepare for an emergency (when a power failure occurs, etc.). .. Further, since the fifth control has a lower priority (importance) than the fourth control, the threshold value (80% (see step S502)) when discharging the storage battery 30 in the fifth control is the fourth. It is set higher than the threshold value (40% (see step S404)) when discharging the storage battery 30 in the control of. That is, in the fifth control having a relatively low importance, the storage battery 30 is set to be less likely to be discharged than in the fourth control having a relatively high importance.

The fifth control does not include (omitted) the process of charging the storage battery 30. This is because the fourth control (step S403) includes the process of charging the storage battery 30, and it is considered that the need for recharging in the fifth control is low. That is, in the present embodiment, the process of charging the storage battery 30 in the fifth control is included in the process of charging the storage battery 30 in the fourth control (common). If the fifth control has a higher priority than the fourth control, the process of charging the storage battery 30 in the fifth control is executed, and the process of charging the storage battery 30 in the fourth control is omitted. It is also possible to do.

Next, the control device 80 executes the sixth control (step S601 to step S604). The sixth control (particularly, the processes from step S602 to step S604 described later) is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

In step S601 transitioned from step S501 or step S502, the control device 80 determines the degree of imbalance (imbalance between the power load and the procured power) of the entire apartment 1. Specifically, the control device 80 determines the degree of imbalance based on the ratio (supply / demand × 100 (%)) of the power supply (procured power) and demand (power load) of the entire condominium 1. ..
The control device 80 shifts to step S602 when the ratio of the power supply to the demand of the entire apartment 1 is 102% or more.
Further, the control device 80 shifts to step S603 when the ratio of the power supply to the demand of the entire apartment 1 is less than 98%.
Further, the control device 80 ends this control when the ratio of the power supply to the demand of the entire apartment 1 is less than 102% and 98% or more.

When the aggregator manages the energy of not only the condominium 1 but also a plurality of condominiums, in the process of step S601, the degree of imbalance of all the condominiums managed by the aggregator is determined. You may.

In step S602, the control device 80 charges each storage battery 30. At this time, the control device 80 charges only the rechargeable storage battery 30 (for example, only the storage battery 30 having a sufficient free capacity). Further, the charge amount at this time is controlled so as to be the difference between the power supply and the demand of the entire condominium 1.

As described above, when the ratio of the power supply to the demand of the entire condominium 1 is 102% or more, the storage battery 30 can be charged to eliminate the difference between the supply and the demand. As a result, the imbalance of the entire condominium 1 can be alleviated.

On the other hand, in step S603 shifted from step S601, the control device 80 determines the SOC value of each storage battery 30.
The control device 80 proceeds to step S604 when the SOC of the storage battery 30 is 90% or more.
Further, the control device 80 ends this control when the SOC of the storage battery 30 is less than 90%.

In step S604, the control device 80 discharges each storage battery 30. At this time, the control device 80 discharges only the storage battery 30 (see step S603) having an SOC of 90% or more. The amount of discharge at this time is controlled so as to be the difference between the power supply and the demand of the entire condominium 1.

As described above, when the ratio of the power supply to the demand of the entire condominium 1 is less than 98%, the difference between the supply and the demand can be eliminated by discharging the storage battery 30. As a result, the imbalance of the entire condominium 1 can be alleviated.

In this way, the control device 80 executes the sixth control (step S602 to step S604) for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 90% or more, it is possible to secure a certain amount of power (90% or more) in the storage battery 30 and prepare for an emergency (when a power failure occurs, etc.). .. Further, since the sixth control has a lower priority (importance) than the fifth control, the threshold value (90% (see step S603)) when discharging the storage battery 30 in the sixth control is the fifth. It is set higher than the threshold value (80% (see step S502)) when discharging the storage battery 30 in the control of. That is, in the sixth control having a relatively low importance, the storage battery 30 is set to be less likely to be discharged than in the fifth control having a relatively high importance.

The control device 80 repeats the above processing (from the first control to the sixth control shown in FIGS. 3 to 5) at predetermined time intervals (for example, every few seconds). At this time, the control device 80 executes the above six controls (from the first control to the sixth control) in order of priority. As described above, in the present embodiment, a plurality of types of functions (from the first control to the sixth control) by the storage battery 30 can be appropriately prioritized and appropriately executed according to the priorities.

As described above, the power supply system 10 according to the present embodiment is
A storage battery 30 that is owned by a plurality of consumers (dwelling units 2) and can supply electric power to the electric power loads (load equipment 20) of the plurality of consumers.
A control device 80 capable of controlling the operation of the storage battery 30 and
A power supply system 10 comprising the above.
The control device 80
The first control for controlling the charge / discharge of the storage battery 30 in order to suppress the voltage fluctuation, and
A second control for discharging the storage battery 30 in order to suppress the demand value of the plurality of consumers as a whole, and
A third control for discharging the storage battery 30 of the customer in order to suppress the demand value of one of the customers, and
In a time zone when the electric power charge is relatively expensive, the storage battery 30 owned by the customer is discharged according to the electric power load of one of the consumers, and in a time zone when the electric power charge is relatively low, it is commercialized. A fourth control for charging the storage battery 30 with electric power from the power source S, and
In a time zone when the electric power charge is relatively expensive, the storage battery 30 is discharged according to the electric power load of the entire plurality of consumers, and in a time zone when the electric power charge is relatively low, the electric power from the commercial power source S is used. A fifth control for charging the storage battery 30 and
A sixth control for controlling the charge / discharge of the storage battery 30 in order to suppress the difference between the power load of the entire plurality of consumers and the procured power, and
Of these, at least two or more controls can be executed, the feasible controls are prioritized, and the controls selected according to the priorities are executed.
With such a configuration, profits can be obtained more effectively by combining a plurality of control methods of the storage battery 30. That is, by setting a priority for each control and executing the control according to the priority, the benefits of the plurality of controls can be obtained by a simple control method.

Further, the first control and the second control are
It is set to have a higher priority than the third control, the fourth control, the fifth control, and the sixth control.
With this configuration, control that is considered to be of high importance can be preferentially executed. That is, since the first control that suppresses voltage fluctuations and the second control that suppresses the demand values of a plurality of consumers as a whole are of high importance, the first control and the second control are more important than other controls. It is possible to obtain profits more effectively by giving priority to the execution.

Further, the fifth control and the sixth control are
It is set to have a lower priority than the first control, the second control, the third control, and the fourth control.
With this configuration, other controls can be executed with priority over the controls that are considered to be less important.

Further, the control device 80 is
When executing the first control and the second control,
The storage battery 30 is discharged regardless of the charge rate (SOC) of the storage battery 30.
With this configuration, control that is considered to be of high importance can be executed regardless of the charge rate of the storage battery 30. Thereby, the profit from the control can be obtained more effectively.

Further, the control device 80 is
When executing the third control, the fourth control, the fifth control, and the sixth control,
Only the storage battery 30 whose charge rate is equal to or higher than a predetermined threshold is discharged.
With this configuration, control that is considered to be of low importance can be executed while ensuring a certain amount of charge in the storage battery 30. As a result, a certain amount of charge can be secured in the storage battery 30 in case of an emergency (such as a power failure).

In addition, the predetermined threshold value is
Of the third control, the fourth control, the fifth control, and the sixth control, the higher the priority, the smaller the value.
With this configuration, control can be executed more appropriately. That is, by setting the threshold value according to the priority, the higher the priority (importance), the easier it is to execute the control (discharge).

The dwelling unit 2 according to the present embodiment is an embodiment of the consumer according to the present invention.
Further, the load device 20 according to the present embodiment is an embodiment of the power load according to the present invention.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications can be made within the scope of the invention described in the claims.

For example, in the above-described embodiment, each control has been described by exemplifying specific numerical values, but the respective numerical values are examples and can be changed arbitrarily.

Further, in the above embodiment, the priority is set in the order of the first control, the second control, the third control, the fourth control, the fifth control, and the sixth control. However, the present invention is not limited to this, and the priority order can be changed arbitrarily. Further, the priority may be determined in advance and stored in the control device 80, or may be automatically set by the control device 80 based on various conditions.

Further, in the above embodiment, the control device 80 is capable of executing the first control, the second control, the third control, the fourth control, the fifth control, and the sixth control. The present invention is not limited to this, as long as at least two or more of the six controls can be executed and the feasible controls are prioritized.

Further, in the above embodiment, since the fourth control is prioritized over the fifth control, the process of charging the storage battery 30 in the fifth control is omitted (the process of charging the storage battery 30 in the fourth control). In the idea of the present invention, the fifth control includes a process of charging the storage battery 30. Therefore, the process of charging the storage battery 30 may be performed in the fifth control, not limited to the example shown in the present embodiment.

Further, in the above embodiment, the six controls are repeated at predetermined time intervals (for example, every few seconds), but the present invention is not limited to this. For example, the time interval for executing the control may be set according to the priority. For example, the first control and the second control (determination of whether to charge / discharge) with high priority are always executed, and the third control to the sixth control with low priority are every predetermined time (determination of whether to charge / discharge). For example, it may be configured to be executed every 10 minutes).

Further, in the present embodiment, the power supply system 10 is applied to the condominium 1, but the present invention is not limited to this. For example, it can be applied to a residential block consisting of a plurality of detached houses.

1 Condominium 2 Dwelling unit 10 Power supply system 20 Load equipment 30 Storage battery 40 Transformer 50 First sensor 60 Second sensor 70 Third sensor 80 Control device

Claims (6)

A storage battery that is owned by a plurality of consumers and can supply power to the power load of the plurality of consumers.
A control device capable of controlling the operation of the storage battery and
It is a power supply system equipped with
The control device is
The first control for controlling the charge / discharge of the storage battery in order to suppress the voltage fluctuation of the plurality of consumers as a whole, and
A second control for discharging the storage battery in order to suppress the demand value of the plurality of consumers as a whole, and
A third control for discharging the storage battery of the customer in order to suppress the demand value of one of the customers.
In the time zone when the electric power charge is relatively expensive, the storage battery owned by the customer is discharged according to the electric power load of one of the consumers, and in the time zone when the electric power charge is relatively low, the commercial power source is used. The fourth control to charge the storage battery with the power from
In a time zone when the electric power charge is relatively expensive, the storage battery is discharged according to the electric power load of the entire plurality of consumers, and in a time zone when the electric power charge is relatively low, the electric power from the commercial power source is used as the storage battery. a fifth control to charge the,
A sixth control for controlling the charge / discharge of the storage battery in order to alleviate the imbalance of the plurality of consumers according to the power load of the plurality of consumers as a whole.
Of these, at least two or more controls can be executed, and the control that can be executed is prioritized .
It is necessary to determine whether it is necessary to charge or discharge based on the control with high priority, and if it is not necessary to charge or discharge, it is necessary to charge or discharge based on the control of the next priority. Determine if there is, select the control that needs to be charged or discharged, and execute the selected control,
Power supply system. The first control and the second control are
It is set to have a higher priority than the third control, the fourth control, the fifth control, and the sixth control.
The power supply system according to claim 1. The fifth control and the sixth control are
It is set to have a lower priority than the first control, the second control, the third control, and the fourth control.
The power supply system according to claim 1 or 2. The control device is
When executing the first control and the second control,
If the storage battery can be discharged, the storage battery is discharged regardless of the charge rate of the storage battery.
The power supply system according to any one of claims 1 to 3. The control device is
When executing the third control, the fourth control, the fifth control, and the sixth control,
Discharge only to storage batteries whose charge rate is equal to or higher than a predetermined threshold.
The power supply system according to any one of claims 1 to 4. The predetermined threshold is
Of the third control, the fourth control, the fifth control, and the sixth control, the higher the priority, the smaller the value.
The power supply system according to claim 5.

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