JP2011205871A - Electric power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power supply system which can prevent a case where an important consumer among a plurality of consumers which share a shared storage cell, cannot receive the sufficient supply of power from the shared storage cell, in such state that sufficient electrical energy remains in the shared storage cell.SOLUTION: In a shared device 20, the shared storage cell 40 which is shared by the plurality of consumers 3 which form a consumer group, is attached. A priority management part 25 previously stores priority information which shows the priority of the supply of power to each consumer 3. A priority control part 24 effects priority control for distributing power accumulated in the shared storage cell 40 to each consumer 3 based on the priority information, when an event wherein the power to be supplied to the consumer 3 is short, occurs.

Description

  The present invention relates to a power supply system including a shared storage battery shared by a plurality of consumers constituting one consumer group.

  A power supply system that includes a storage battery as a component for the purpose of securing power supply to consumers in the event of a power outage when the supply of commercial power from an electric power company has been stopped due to a disaster or the like in recent years due to a fall in the price of the storage battery Has been proposed.

  In this case, it is conceivable to provide a storage battery for each consumer (such as a dwelling unit or a store). However, in terms of the efficiency of use of the storage battery and the maintenance cost of the storage battery borne by each consumer, the storage battery is individually It is not desirable to provide a storage battery. On the other hand, a power supply system in which one shared storage battery (common storage battery) is installed in a consumer group consisting of a group of a plurality of consumers, and the shared storage battery can be shared by a plurality of consumers in the consumer group. Has been proposed (see, for example, Patent Document 1).

  In the power supply system described in Patent Literature 1, the system control unit provided in the shared storage battery detects the excess or deficiency of power for each consumer, and the stored power of the shared storage battery is supplied to the consumer who is short of power. Supply.

JP 2002-233077 A (paragraphs 0024-0036)

  However, in the power supply system described above, when a commercial power supply is interrupted due to a disaster or the like, there is a possibility that a plurality of consumers will be short of power all at once, and the power that each consumer can obtain from the shared storage battery may be limited. As a result, in the above power supply system, even when a sufficient amount of power remains in the shared storage battery, for example, an important consumer such as a store designated as a shelter can receive sufficient power supply from the shared storage battery. There is a possibility of disappearing.

  The present invention has been made in view of the above-described reason, and in a state where a sufficient amount of electric power remains in the shared storage battery, important consumers among the plurality of consumers sharing the shared storage battery are sufficient from the shared storage battery. An object of the present invention is to provide a power supply system that can prevent a situation in which it cannot receive a sufficient power supply.

  The power supply system of the present invention includes a shared storage battery shared by a plurality of consumers constituting one consumer group, and a power supply control device that supplies the power stored in the shared storage battery to the consumer. The power supply control device includes a priority management unit that stores priority information indicating a priority of power supply for each of the consumers, and when an event in which supply power is insufficient in the consumer occurs, It has a priority control part which performs the priority control which distributes the electric power accumulate | stored in a shared storage battery to each of the said consumer based on the said priority information.

  In this power supply system, the power supply control device includes a power failure detection unit that detects the presence or absence of a power failure of a commercial power source, and the priority control unit generates the event when a power failure is detected by the power failure detection unit. It is desirable that the priority control is performed.

  In this power supply system, the power supply control device automatically acquires an information acquisition unit that acquires load information from the consumer and the priority of the customer in the priority information based on the information acquired by the information acquisition unit. It is more desirable to have an automatic setting unit that sets automatically.

  In this power supply system, the priority management unit stores the priority of power supply for each load as the priority information, and the priority control unit uses the power stored in the shared storage battery as the priority information. More preferably, the load is distributed for each load.

  In this power supply system, at least one of the consumers constituting the consumer group includes an individual storage battery that supplies power to a load of the consumer, and the power supply control device includes power stored in the shared storage battery. When the amount falls below a predetermined threshold, it is more desirable to supply the consumer with the electric power stored in the individual storage battery instead of the shared storage battery.

  In this power supply system, at least one of the consumers constituting the consumer group includes an individual power generation facility that generates power, and the power supply control device has a predetermined amount of power stored in the shared storage battery. It is more desirable that the shared storage battery is charged using the individual power generation facility.

  The present invention can prevent an important consumer from receiving sufficient power supply from a shared storage battery among a plurality of consumers sharing the shared storage battery in a state where a sufficient amount of power remains in the shared storage battery. There are advantages.

1 is a schematic block diagram illustrating a configuration of a first embodiment. It is a schematic system block diagram which shows an electric power supply system same as the above.

(Embodiment 1)
The power supply system of the present embodiment is applied to a consumer group composed of a group of a plurality of consumers (such as dwelling units and shops). Below, the community which consists of a some consumer in a specific area is demonstrated as an example of a consumer group.

  As shown in FIG. 2, the power supply system 1 includes a shared device 20 installed in a shared area 2 such as a public facility, and a customer device 30 installed for each customer 3. The shared device 20 and each customer device 30 are connected to each other via the distribution line 11 connected to the commercial power supply 10 and can communicate with each other via the communication network 12.

  The shared device 20 is provided with a shared storage battery 40 that can be charged and discharged, and a power generation facility 50 that generates DC power for charging the shared storage battery 40. The shared storage battery 40 is shared by a plurality of consumers 3 constituting a consumer group. The power generation facility 50 is formed of, for example, a solar cell or a fuel cell, and generates electric power for charging the shared storage battery 40 separately from the commercial power source 10.

  A plurality of loads (lighting fixtures, telephones, televisions, etc.) 60 are connected to the consumer device 30. These loads 60 normally operate by receiving power supply from the commercial power supply 10 via the distribution line 11. On the other hand, in an emergency in which the power supply is insufficient at the customer 3 due to, for example, a power failure of the commercial power supply 10, these loads 60 operate by receiving power supply from the shared storage battery 40 via the distribution line 11. Furthermore, in this embodiment, at least one consumer 3 is provided with a power storage facility 70 described later.

  In the present embodiment, the shared device 20 and the customer device 30 installed in each customer 3 constitute a power supply control device. The power supply control device has a function of supplying the power stored in the shared storage battery 40 to the consumer 3.

  As shown in FIG. 1A, the shared device 20 includes a charge / discharge unit 21 that charges and discharges the shared storage battery 40, a storage battery management unit 22 that manages the shared storage battery 40, and a shared network connected to the communication network 12. The communication unit 23 includes a priority control unit 24 and a priority management unit 25 described later. Further, the shared device 20 includes a power failure detection unit 26 that detects a power failure of the commercial power supply 10, a meter communication unit 27 that communicates with a power meter (not shown), and a power amount storage unit 28 that stores measurement results of the power meter. And have.

  The shared communication unit 23 communicates with the customer device 30 via the communication network 12. The power meter measures the amount of power exchanged between the consumer device 30 and the shared device 20 for each consumer 3. The power storage unit 28 stores the measurement result of the power meter for each customer 3.

  The charging / discharging unit 21 has two operation modes: a charging mode for charging the shared storage battery 40 and a discharging mode for discharging the shared storage battery 40. In the charging mode, the charging / discharging unit 21 charges the shared storage battery 40 by the output of the power generation facility 50 or the commercial power supply 10. The charging / discharging unit 40 includes a power conversion unit (not shown). When the shared storage battery 40 is charged by the commercial power source 10, the commercial power source 10 is converted into a DC voltage by the power conversion unit. Charge. In the discharge mode, the charging / discharging unit 21 converts the output of the shared storage battery 40 into an AC voltage at the power conversion unit and sends it to the distribution line 11. Thereby, the electric power accumulated in the shared storage battery 40 is supplied to each consumer 3 via the distribution line 11.

  The operation mode of the charge / discharge unit 21 is switched by the storage battery management unit 22. The storage battery management unit 22 switches the operation mode of the charge / discharge unit 21 in accordance with an instruction from the priority control unit 24. In addition, the storage battery management unit 22 monitors the remaining capacity of the shared storage battery 40 in conjunction with the control of the charging / discharging unit 21, and the remaining capacity of the shared storage battery 40 reaches an upper limit (for example, 95% of the full charge capacity). When it does, it has the function to stop charge of the shared storage battery 40.

  In the present embodiment, the priority control unit 24 receives the output of the power failure detection unit 26 and issues an instruction to the storage battery management unit 22 so that the operation mode of the charge / discharge unit 21 is set to the discharge mode only during a power failure of the commercial power supply 10. . Note that a disconnector (not shown) is inserted between the shared device 20 and the commercial power supply 10 in the distribution line 11, and the power failure detection unit 26 opens the disconnector when a power failure of the commercial power supply 10 is detected. To do. Therefore, since the space between the charging / discharging unit 21 of the shared device 20 and the commercial power supply 10 is opened at the time of a power failure, the output of the shared storage battery 40 does not flow backward to the commercial power supply 10 side.

  As shown in FIG. 1 (b), the customer device 30 includes an in-house distribution board 31 connected to the distribution line 11, a load management unit 32 that manages the type of the load 60, a control unit 33 and a power distribution described later. And a limiting portion 34. Further, the customer device 30 includes a customer communication unit 35 that is connected to the communication network 12 and communicates with the shared communication unit 23.

  Here, FIG.1 (b) has illustrated about the consumer 3 to which the electrical storage equipment 70 was attached. The power storage facility 70 includes an individual storage battery 71 that can be charged and discharged, and an individual charge / discharge unit 72 that charges and discharges the individual storage battery 71.

  A plurality of loads 60 are connected to the in-house distribution board 31, and the power supplied from the commercial power supply 10 or the shared storage battery 40 via the distribution line 11 is distributed to the plurality of loads 60. Further, in the customer 3 having the power storage facility 70, the individual charge / discharge unit 72 is connected to the in-house distribution board 31. The individual storage battery 71 is charged by the commercial power supply 10 via the distribution line 11, and the electric power stored in the individual storage battery 71 is used by the load 60 of the customer 3 in which the individual storage battery 71 is installed.

  The load management unit 32 includes an information storage unit 36 that stores information related to the load 60 connected to the in-house distribution board 31, and an information input / output unit 37 that inputs and outputs information to and from the information storage unit 36. The information storage unit 36 stores a plurality of pieces of information such as a type (separately for lighting fixtures, telephones, televisions, etc.), rated power consumption, priority, and the like for each load 60 in a database. Here, it is assumed that a person inputs information in the information storage unit 36 individually from the information input / output unit 37, but the information input / output unit 37 automatically acquires the information on the load 60 by communicating with the load 60. However, it may be stored in the information storage unit 36.

  By the way, the priority management unit 25 of the shared device 20 stores in advance priority information indicating the priority of power supply for each consumer 3. The priority information includes a table in which a management ID, an address, a meter ID for identifying a power meter, and a priority are associated with each customer 3 as shown in Table 1 below.

  In the example of Table 1, the priority of dwelling unit A (management ID: X0001) is “3”, the priority of dwelling unit B (management ID: X0002) is “1”, and the priority of dwelling unit C (management ID: X0003) is The priority of “6” and dwelling unit D (management ID: X0004) is set to “4”. Here, the smaller the numerical value of the priority, the higher the priority. That is, Table 1 shows that the priority becomes lower in the order of dwelling unit B, dwelling unit A, dwelling unit D, and dwelling unit C.

  In the present embodiment, the priority information is set by a system administrator using a dedicated setting terminal (not shown) when the power supply system 1 is constructed. The manager determines the priority of each customer 3 according to the role of each customer 3 in the customer group. Here, the manager is an important customer such as a customer 3 designated as an evacuation center, a customer 3 located geographically in the area where the customer group is constructed, or a crime prevention base or a communication base. The priority is determined so that the priority is higher for the customer 3 who has played a role.

  The priority control unit 24 uses the power stored in the shared storage battery 40 as the above-described priority information when an event (hereinafter simply abbreviated as “event”) occurs in which the customer 3 has insufficient power supply. Based on this, priority control is performed for each customer 3. In this embodiment, the priority control unit 24 determines that an event has occurred when the power failure detection unit 26 detects a power failure of the commercial power supply 10 and performs priority control.

  Specifically, the priority control unit 24 controls the power distribution limiting unit 34 of each consumer 3 so as to individually limit the power supplied from the shared storage battery 40 for each customer 3. That is, the priority control unit 24 transmits a power distribution instruction for distributing the power of the shared storage battery 40 to the consumer device 30 of each consumer 3 from the shared communication unit 23 via the communication network 12.

  When receiving the power distribution instruction through the consumer communication unit 35, the control unit 33 of the customer device 30 controls the power distribution limiting unit 34 according to the power distribution instruction, and limits the power supplied from the in-house distribution board 31 to the load 60. That is, the power distribution limiting unit 34 has a function of limiting the power supplied from the in-house distribution board 31 to the load 60, and limits the maximum power (maximum current) that can be supplied to the load 60 or supplies power to the load 60. Can be completely shut off.

  For example, when priority control is performed based on the priority information shown in Table 1 above, the priority control unit 24 is a consumer of each consumer 3 such that the priority is lowered in the order of dwelling unit B, dwelling unit A, dwelling unit D, and dwelling unit C. A power distribution instruction to be sent to the device 30 is determined. Specifically, when the maximum value of power supplied to each consumer 3 is limited by the power distribution instruction, the maximum power that can be supplied to the load 60 in the order of dwelling unit B, dwelling unit A, dwelling unit D, dwelling unit C is small. Thus, the maximum value of the supplied power is designated by the power distribution instruction to each consumer 3.

  Here, the priority control unit 24 may change the distribution of the supply power to each consumer 3 according to the remaining capacity of the shared storage battery 40 managed by the storage battery management unit 22.

  That is, for example, in the state where the remaining capacity of the shared storage battery 40 is close to full charge, there is a margin in the stored power of the shared storage battery 40, and even if a part of the stored power is allocated to the consumer 3 with low priority, priority is given. There is no shortage of power supplied to the highly demanding customer 3. On the other hand, in a state where the remaining capacity of the shared storage battery 40 is lower than a predetermined value (for example, 50% of the full charge capacity), there is no margin in the stored power of the shared storage battery 40 and a part of the stored power is demanded with low priority. If it assigns to the house 3, the electric power supplied to the consumer 3 with a high priority may be insufficient. Therefore, the priority control unit 24 supplies power to the consumer 3 with low priority when the remaining capacity of the shared storage battery 40 is close to full charge, and the priority is increased as the remaining capacity of the shared storage battery 40 is reduced. The priority control is performed so that the power supply is stopped in order from the lowest consumer 3.

  The priority control unit 24 is configured to be able to detect the type of event (here, a power failure) (for example, a power failure due to a lightning strike and a power failure due to an earthquake), and supply to each customer 3 according to the event type. The distribution of power may be changed.

  That is, for example, in the case of a power failure due to a lightning strike, the time required until the commercial power supply 10 is restored is generally short. Therefore, even if a part of the stored power of the shared storage battery 40 is allocated to the low-priority consumer 3 There is no shortage of power to be supplied to high-demand consumers 3. On the other hand, in the case of a power failure due to an earthquake, it may take a long time to restore the commercial power supply 10. Therefore, if the stored power of the shared storage battery 40 is also assigned to a consumer 3 with low priority, the commercial power supply 10 Until the battery is restored, the remaining capacity of the shared storage battery 40 may run out. As a result, there is a shortage of power to be supplied to the consumers 3 with high priority. Therefore, the priority control unit 24 supplies power to the low-priority customer 3 in the case of a power failure due to lightning, and supplies power only to the high-priority customer 3 in the case of a power failure due to an earthquake. Priority control is performed as is done.

  According to the power supply system 1 of the present embodiment described above, since the shared storage battery 40 is shared by a plurality of consumers, each consumer is compared with a case where a storage battery is individually installed in each consumer. Can reduce the economic burden. Here, when an event called a power failure occurs, the priority control unit 24 performs priority control, so that the stored power of the shared storage battery 40 is preferentially supplied to the customer 3 who plays an important role in the customer group. can do.

  In other words, even if a plurality of consumers 3 become short of power at the same time when the commercial power supply 10 is cut off due to a disaster or the like, the stored power of the shared storage battery 40 is transferred to important consumers 3 such as stores designated as shelters. It will be preferentially supplied. Therefore, in the power supply system 1, the important consumer 3 among the plurality of consumers 3 sharing the shared storage battery 40 supplies sufficient power from the shared storage battery 40 while the shared storage battery 40 has a sufficient remaining capacity. You can avoid the situation that you can not receive. In addition, since the shared storage battery 40 is installed in the shared area 2, there is also an advantage that the maintenance performance of the storage battery is excellent as compared with the case where the storage battery is installed in a specific dwelling unit.

  In the power supply system 1 of the present embodiment, the power supply control device (the shared device 20 and the customer device 30) replaces the shared storage battery 40 when the amount of power stored in the shared storage battery 40 falls below a predetermined threshold. A function of using the individual storage battery 71 may be provided. In this case, when the remaining capacity of the shared storage battery 40 falls below the threshold value, the power supply control device causes the individual charge / discharge unit 72 to supply the customer 3 with the power stored in the individual storage battery 71 instead of the shared storage battery 40. Control.

  Specifically, when the remaining capacity of the shared storage battery 40 managed by the storage battery management unit 22 falls below a threshold, the power supply control device controls the priority control unit 24 via the shared communication unit 23 and the customer communication unit 35. A shortage notification is sent to the unit 33. Receiving the shortage notification, the control unit 33 controls the individual charging / discharging unit 72 to discharge the power stored in the individual storage battery 71 to the distribution line 11. Here, the in-house distribution board 31 is provided with a power conversion unit (not shown), and the output of the individual storage battery 71 is converted into AC power by the power conversion unit and then sent to the distribution line 11. When the stored power of the individual storage battery 71 is sent to the distribution line 11, the priority control unit 24 controls the charging / discharging unit 21 to stop discharging from the shared storage battery 40.

  In this way, when the power supply control device uses the individual storage battery 71 instead of the shared storage battery 40, the power stored in the individual storage battery 71 installed in the consumer 3 having a low priority is given priority in the event of a power failure of the commercial power supply 10. It can be used by highly demanding customers 3.

  Furthermore, when an individual power generation facility (not shown) that generates electric power is installed in at least one consumer 3 constituting the consumer group, the power supply control device The output may be used for charging the shared storage battery 40. That is, when the remaining capacity of the shared storage battery 40 falls below a predetermined threshold, the power supply control device charges the shared storage battery 40 using the individual power generation facility. The individual power generation facility is composed of, for example, a solar cell or a fuel cell, and normally generates electric power to be used with the load of the customer 3.

  Specifically, when the remaining capacity of the shared storage battery 40 managed by the storage battery management unit 22 falls below a threshold, the power supply control device controls the priority control unit 24 via the shared communication unit 23 and the customer communication unit 35. A shortage notification is sent to the unit 33. Receiving the shortage notification, the control unit 33 controls the individual power generation facility, and causes the distribution line 11 to output the output of the individual power generation facility converted into AC power by the power conversion unit in the in-house distribution board 31. When the output of the individual power generation facility is sent to the distribution line 11, the priority control unit 24 controls the charge / discharge unit 21 to charge the shared storage battery 40.

  Thus, even if the remaining capacity of the shared storage battery 40 decreases at the time of a power failure of the commercial power supply 10, the shared storage battery 40 can be charged by using the output of the individual power generation equipment for charging the shared storage battery 40. it can. As a result, there is an advantage that the charging time of the shared storage battery 40 can be shortened as compared with the case where the shared storage battery 40 is charged only by the output of the power generation facility 50 attached to the shared apparatus 20.

  Furthermore, the power supply system 1 may be configured to be able to supply the stored power of the individual storage battery 71 from the consumer 3 having the individual storage battery 71 to the other consumer 3 without passing through the shared device 20. Thereby, even when electric power cannot be supplied from the shared storage battery 40 to the customer 3 due to a failure of the shared device 20 or the like, the electric power necessary for the consumer group can be covered to some extent by the stored electric power of the individual storage battery 71. In addition, if the priority management part which memorize | stored priority information is provided in the consumer apparatus 30 side, even when the consumer apparatus 30 delivers and receives the electric power of the individual storage battery 71 without passing through the shared apparatus 20, Priority control that distributes power according to the priority of every three can be performed.

  By the way, in this embodiment, although the example which supplies the electrical storage power of the shared storage battery 40 to the consumer 3 only during the power failure of the commercial power supply 10 was shown, it is not restricted to this example. In other words, the power supply system 1 is not limited to the power failure of the commercial power supply 10, but may be any configuration that discharges the shared storage battery 40 when an event occurs in which the supply power is insufficient in the customer 3. For example, when a solar cell as an individual power generation facility is installed in each customer 2 and the power of the load 60 of each customer 3 is covered by the individual power generation facility, sufficient power is generated by the individual power generation facility at night. An event may be generated when no longer can be generated.

  The communication between the shared communication unit 23 and the customer communication unit 35 is not limited to that performed via the communication network 12, but may be performed via the distribution line 11 by power line carrier communication, for example.

(Embodiment 2)
In the power supply system 1 of the present embodiment, the priority information stored in the priority management unit 24 is automatically set based on information on the load 60 of the customer 3 (hereinafter referred to as “load information”). This is different from the power supply system 1 of the first embodiment.

  In the present embodiment, the shared device 20 automatically sets priority information based on the information acquisition unit (not shown) that acquires load information from each consumer 3 and the load information acquired by the information acquisition unit. And a setting unit (not shown).

  The information acquisition unit automatically acquires the load information managed by the load management unit 32 of the customer device 30 via the customer communication unit 35 and the shared communication unit 23. The information acquisition unit acquires load information when a customer device is newly connected or when the load information of the load management unit 32 is updated, and the priority management unit acquires the acquired load information for each customer 3 25. Here, the priority of the load 60 included in the load information represents the priority order throughout the consumer group regardless of the consumer 3 in which the load 60 is provided.

  For example, as shown in Table 2 below, the load information is a table in which installed customers 3, addresses, (rated) power consumption, and priorities are associated with each load 60. 25. The example of Table 2 represents load information about a television set in the dwelling unit A, an anxiety device, a lighting fixture, and a telephone set in the dwelling unit B. Here, the smaller the numerical value of the priority, the higher the priority. That is, Table 2 shows that the priorities of these loads 60 are lowered in the order of cardiopulmonary apparatus, lighting equipment, telephone, and television.

  The automatic setting unit sets the priority of each customer 3 in the priority information based on the priority of each load 60 included in the load information. Specifically, the automatic setting unit compares the priority of the load 60 having the highest priority among the consumers 3 among the plurality of consumers 3, and prioritizes the consumers in descending order of priority of the load 60. Set the degree higher. Thereby, a higher priority is set for the customer 3 including the load 60 having a higher priority. In the example of Table 2 above, the priority of the dwelling unit A including the cardiopulmonary apparatus having the priority “1” is set to “1”.

  According to the power control system 1 of the present embodiment described above, the priority for each consumer 3 used for priority control is automatically set according to the priority of the load 60 belonging to each consumer 3. Therefore, even when a power outage event occurs, the priority control unit 24 preferentially supplies the stored power of the shared storage battery 40 to the consumer 3 including a high-priority load 60 such as a cardiopulmonary apparatus. can do. In addition, since the priority information is automatically set by the automatic setting unit, there is an advantage that the trouble of setting the priority information can be saved.

  The priority management unit 25 may store the priority of power supply for each load 3 of each consumer 3 as priority information in addition to the priority of power supply for each consumer 3. When the priority for each load 60 is stored as priority information, the priority control unit 24 performs priority control for distributing the stored power of the shared storage battery 40 for each load 60 based on the priority information. That is, the priority control unit 24 distributes the power stored in the shared storage battery 40 to each load 60 based on the above-described priority information when an event occurs in which the power supply is insufficient in the customer 3. I do.

  Specifically, the priority control unit 24 controls the power distribution control unit 34 of each consumer 3 so as to limit the power supplied from the shared storage battery 40 for each load 60. That is, the priority control unit 24 transmits a power distribution instruction for distributing the power of the shared storage battery 40 to the consumer device 30 of each consumer 3 from the shared communication unit 23 via the communication network 12.

  When receiving the power distribution instruction through the consumer communication unit 35, the control unit 33 of the consumer device 30 controls the power distribution control unit 34 in accordance with the power distribution instruction, and limits the power supplied from the in-house distribution board 31 to the load 60. Here, the power distribution control unit 34 has a function of limiting the supply power for each load 60. Note that the power distribution control unit 34 may treat the loads 60 such as a plurality of lighting fixtures as one load circuit and limit the supply power for each load circuit.

  For example, when priority control is performed based on the priority of each load 60 in Table 2, the priority control unit 24 prioritizes the cardiopulmonary apparatus of the dwelling unit A, the lighting device of the dwelling unit A, the telephone set of the dwelling unit B, and the television set of the dwelling unit A. The power distribution instruction to be sent to the consumer device 30 of each consumer 3 is determined so that the degree is low. At this time, the priority control unit 24 allocates power (rated power consumption) in order from the load 60 with the highest priority within the range of the discharge power (the maximum power that can be discharged) of the shared storage battery 40.

  As described above, the priority control unit 24 distributes the stored power of the shared storage battery 40 for each load 60 based on the priority information. It can be used effectively. That is, even in the consumer 3 with low priority, the power of the shared storage battery 40 is preferentially assigned to the load 60 with high priority. On the contrary, even if it exists in the consumer 3 with a high priority, the electric power of the shared storage battery 40 is not preferentially allocated with respect to the load 60 with a low priority. Therefore, the power supply system 1 has an advantage that the stored power of the shared storage battery 40 can be prevented from being wasted by the load 60 having a low priority.

  Other configurations and functions are the same as those of the first embodiment.

1 Power supply system 3 Consumer 20 Shared device (power supply control device)
24 Priority control unit 25 Priority management unit 26 Power failure detection unit 30 Consumer device (power supply control device)
40 Shared storage battery 60 Load 71 Individual storage battery

Claims (6)

  A shared storage battery shared by a plurality of consumers constituting one consumer group, and a power supply control device for supplying the customer with the power stored in the shared storage battery, the power supply control device comprising: , A priority management unit that stores priority information representing the priority of power supply for each of the consumers, and the power stored in the shared storage battery when an event occurs in which the power supply is insufficient in the consumer And a priority control unit that performs priority control for allocating to each of the consumers based on the priority information.   The power supply control device includes a power failure detection unit that detects the presence or absence of a power failure of a commercial power supply, and the priority control unit determines that the event has occurred when a power failure is detected by the power failure detection unit, The power supply system according to claim 1, wherein priority control is performed.   The power supply control device includes an information acquisition unit that acquires load information from the consumer, and automatic setting that automatically sets the priority of the customer in the priority information based on the information acquired by the information acquisition unit The power supply system according to claim 1, wherein the power supply system includes a unit.   The priority management unit stores the priority of power supply for each load as the priority information, and the priority control unit determines the power stored in the shared storage battery for each load based on the priority information. 4. The power supply system according to claim 3, wherein distribution is performed.   At least one of the consumers constituting the consumer group is provided with an individual storage battery that supplies power to the load of the consumer, and the power supply control device has a predetermined threshold value for the amount of power stored in the shared storage battery. The power supply system according to any one of claims 1 to 4, wherein when it falls below, the electric power stored in the individual storage battery is supplied to the consumer instead of the shared storage battery. At least one of the consumers constituting the consumer group includes an individual power generation facility that generates power, and the power supply control device is configured such that when the amount of power stored in the shared storage battery is below a predetermined threshold, The power supply system according to any one of claims 1 to 4, wherein the shared storage battery is charged using the individual power generation facility.

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