JP2017221050A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system which can effectively prevent the deviation of discharge and charge to a particular power storage device among a plurality of power storage devices.SOLUTION: The power supply system includes: a plurality of power storage devices 20 which can discharge power to each house H through power distribution lines L(L1-L8); a switchover device 30 which switches each power supply route of the distribution lines L(L1-L8) to thereby change mutual positional relationship among the plurality of power storage devices 20 in a power distribution direction; and an EMS 50 which acquires each integrated discharge power amount of the power storage devices 20 to set the discharge priority of the power storage devices 20 in order from the smallest acquired integrated discharge power amount to the largest, to control the operation of the switchover device 30 to switch over the power supply route in such a manner that a power storage device 20 having higher priority is disposed on the downstream side in the power distribution direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a technique of a power supply system including a plurality of power storage devices.

  Conventionally, the technology of a power supply system including a plurality of power storage devices has been publicly known. For example, as described in Patent Document 1.

  The power supply system described in Patent Literature 1 includes a plurality of power storage devices that can charge and discharge power. In such a power supply system, power from a plurality of power storage devices can be supplied to a load. That is, it is possible to supply to the load an amount of power that is difficult to obtain with only one power storage device.

  In addition, in the power supply system described in Patent Document 1, the load is determined based on the state of charge of the power storage device (the ratio of the remaining charge accumulated with respect to the rated capacity capable of storing power) and the number of times of charging. A power storage device that supplies power is determined. This prevents discharge and charge from being biased toward a specific power storage device among the plurality of power storage devices.

JP 2013-179729 A

  However, in order to determine the power storage device that supplies power to the load, based on the ratio of the remaining charge of the power storage device and the number of times of charging is not sufficient to prevent the discharge or charge from being biased to a specific power storage device. It was enough.

  The present invention has been made in view of the situation as described above, and the problem to be solved is to effectively prevent discharge and charging from being biased to a specific power storage device among a plurality of power storage devices. It provides a possible power supply system.

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

  That is, switching between a plurality of power storage devices capable of discharging power to a load via a distribution line and a change in the positional relationship between the plurality of power storage devices in the power distribution direction by switching a power feeding path in the distribution line. By acquiring the integrated discharge power amount of the device and the power storage device, setting the priority of discharge of the power storage device in the order of the acquired cumulative discharge power amount being small, and controlling the operation of the switching device, And a control unit that switches the power supply path so that the power storage device with the higher priority is arranged on the downstream side in the power distribution direction.

The switching device may include a plurality of opening / closing mechanisms provided on the distribution line and opening / closing the provided portions, and the power supply path may be switched by opening / closing the plurality of opening / closing mechanisms.
With such a configuration, the power feeding path can be easily switched.

N power storage devices are connected to the distribution line, and the distribution line is connected to a first distribution line from a system power source to the load and two different points on the first distribution line. A plurality of second distribution lines, and the plurality of opening / closing mechanisms include N + 1 opening / closing mechanisms provided in the first distribution line and N ² −1 provided in the second distribution line. The opening / closing mechanism may be included.
With such a configuration, it is possible to effectively prevent the discharge or charge from being biased toward a specific power storage device among the N power storage devices.

The control unit may hold the third power feeding path in a state in which power can be supplied while switching the power feeding path from the first power feeding path to a second power feeding path different from the first power feeding path.
With such a configuration, the power supply path can be switched without causing a temporary power failure, noise, or surge.

The third power feeding path may be a power feeding path used when the switching device is not operating.
With such a configuration, the power supply path can be switched without causing a temporary power failure, noise, or surge.

  As effects of the present invention, the following effects can be obtained.

  It is possible to effectively prevent the discharge or charge from being biased toward a specific power storage device among the plurality of power storage devices.

The block diagram which showed the structure of the electric power supply system which concerns on 1st embodiment. Similarly, the block diagram which showed the flow of the electric power in the case of supplying electric power from a distribution line. Similarly, the flowchart which showed the process of the preset by EMS. Similarly, the flowchart which showed the process of the operation | movement of the switching apparatus by EMS. Similarly, the block diagram which showed the flow of the electric power in step S115. Similarly, the block diagram which showed the flow of the electric power in step S119. Similarly, the block diagram which showed the flow of the electric power in step S120. Similarly, the block diagram which showed the flow of the electric power in step S123. Similarly, the block diagram which showed the flow of the electric power in step S124. The flowchart which showed the process of the operation | movement of the switching apparatus which concerns on 2nd embodiment. Similarly, the block diagram which showed the state of the electric power supply system in step S115. The block diagram which showed the structure of the electric power supply system which concerns on 3rd embodiment. Similarly, the flowchart which showed the process of the operation | movement of the switching apparatus by EMS. Similarly, the block diagram which showed the flow of the electric power in step S312. Similarly, the block diagram which showed the flow of the electric power in step S313. The flowchart which showed the process of the operation | movement of the switching apparatus which concerns on 4th embodiment. Similarly, the block diagram which showed the state of the electric power supply system in step S313.

  Below, the electric power supply system 1 which concerns on 1st embodiment is demonstrated.

  The power supply system 1 shown in FIG. 1 is assumed to be applied to a residential block (a collection of houses H) composed of a plurality of detached houses (housing H). Specifically, in the residential block, as a plurality of (detached) houses H, a first house H1, a second house H2, a third house H3, and the like are provided. In the residential area, a power retailer purchases electric power from an electric power company (system power supply S) in a lump, and the purchased electric power is appropriately supplied (sold) to each house H.

  The power supply system 1 is used to appropriately supply (consolidate) the power purchased by the power retailer from the power company between the plurality of houses H (first house H1, second house H2, and third house H3). System. As shown in FIG. 1, the power supply system 1 mainly includes a sensor unit 10, a plurality of power storage devices 20, a switching device 30, and an EMS 50.

  The plurality of houses H (first house H1, second house H2, and third house H3) are buildings where people live. Each house H is provided with appropriate electrical products and consumes electric power.

  Each house H is connected to a system power supply S. Specifically, each house H has a distribution line L (in FIG. 1, from the system power supply S) whose upstream end is connected to the system power supply S and whose downstream end is branched and connected to each house H. The power supply S is connected to each house H via a distribution line L) extending in the left-right direction.

  The sensor unit 10 detects power flowing through the distribution line L. The sensor unit 10 includes a first sensor 11, a second sensor 12, and a third sensor 13. The 1st sensor 11, the 2nd sensor 12, and the 3rd sensor 13 detect the electric power which distribute | circulates an arrangement | positioning location, respectively. Each of the first sensor 11, the second sensor 12, and the third sensor 13 is configured to be able to output a signal related to the detection result. The first sensor 11, the second sensor 12, and the third sensor 13 are provided so as to correspond to a plurality of power storage devices 20 described later (one sensor is provided for one power storage device). The 1st sensor 11, the 2nd sensor 12, and the 3rd sensor 13 are arranged in order toward the upper stream side (system power supply S side) from the lower stream side (each house H side) in distribution line L, respectively.

  The plurality of power storage devices 20 (the first power storage device 21, the second power storage device 22, and the third power storage device 23) are for charging and discharging power from the system power source S as appropriate. Each power storage device 20 includes a chargeable / dischargeable storage battery, a power conditioner that controls charge / discharge of the storage battery, and the like. Each power storage device 20 is provided so as to correspond to a predetermined house H (one power storage device is provided for one house H). Each power storage device 20 is owned by the predetermined house H (resident of the house H). The first power storage device 21, the second power storage device 22, and the third power storage device 23 are each connected to a midway portion of the distribution line L. The first power storage device 21, the second power storage device 22, and the third power storage device 23 are arranged in order from the downstream side to the upstream side in the distribution line L, respectively.

  The first power storage device 21 is connected to a first power storage device connection point P <b> 11 arranged on the distribution line L immediately downstream of the first sensor 11. The first power storage device 21 is electrically connected to the first sensor 11. Thus, the first power storage device 21 is provided corresponding to the first sensor 11. The first power storage device 21 is owned by a resident of the first house H1.

  The second power storage device 22 is connected to the second power storage device connection point P <b> 12 disposed immediately downstream of the second sensor 12 in the distribution line L. Second power storage device 22 is electrically connected to second sensor 12. Thus, the second power storage device 22 is provided in correspondence with the second sensor 12. The second power storage device 22 is owned by a resident of the second house H2.

  The third power storage device 23 is connected to a third power storage device connection point P <b> 13 disposed on the distribution line L immediately downstream of the third sensor 13. Third power storage device 23 is electrically connected to third sensor 13. Thus, the third power storage device 23 is provided corresponding to the third sensor 13. The third power storage device 23 is owned by a resident of the third house H3.

  Each power storage device 20 (the first power storage device 21, the second power storage device 22, and the third power storage device 23) configured as described above is in a predetermined charging time zone (for example, from 23:00 to 7:00). It is comprised so that the electric power from the system power supply S may be charged. In this way, relatively inexpensive power to which the midnight charge is applied is charged in each power storage device 20, and the charged power is discharged in the daytime period (where the midnight charge is not applied). The purchase amount of can be reduced. In addition, the electric power charged in each power storage device 20 is obtained by distributing the electric power after the electric power retailer collectively purchased from the electric power company. That is, the charge for the electric power charged in each power storage device 20 is paid from the resident who owns each power storage device 20 to the power retailer.

  In addition, each power storage device 20 receives a signal output from the sensor (first sensor 11, second sensor 12, and third sensor 13) of the corresponding sensor unit 10, and based on the input signal, the sensor The detection result can be obtained. Each power storage device 20 can perform a load following operation for adjusting the amount of electric power to be discharged (output) based on the detection result of the sensor of the corresponding sensor unit 10.

  In addition, each power storage device 20 is configured to be able to calculate an integrated discharge electric energy that is a sum of electric energy discharged during a predetermined period (in the present embodiment, the latest 24 hours).

  A plurality of switching connection points (from the first switching connection point P21 to the eighth switching connection point P28) are provided in the distribution line L to which each power storage device 20 is connected. The first switching connection point P21 to the eighth switching connection point P28 are sequentially arranged in the distribution line L from the upstream side toward the downstream side.

  More specifically, the first switching connection point P <b> 21 and the second switching connection point P <b> 22 are provided between the system power supply S and the third sensor 13. The second switching connection point P <b> 22 is provided immediately upstream of the third sensor 13. Third switching connection point P23 is provided immediately downstream of third power storage device connection point P13. The fourth switching connection point P <b> 24 is provided immediately upstream of the second sensor 12. The fifth switching connection point P25 is provided immediately downstream of the second power storage device connection point P12. The sixth switching connecting point P <b> 26 is provided immediately upstream of the first sensor 11. Seventh switching connection point P27 is provided immediately downstream of first power storage device connection point P11. The eighth switching connection point P <b> 28 is provided immediately upstream of the downstream end portion (the branching portion) of the distribution line L.

  A plurality of switching distribution lines (from the first switching distribution line L1 to the eighth switching distribution line L8) are appropriately connected from the first switching connection point P21 to the eighth switching connection point P28. The

  More specifically, the first switching distribution line L1 has one end connected to the first switching connecting point P21 and the other end connected to the fourth switching connecting point P24. One end of the second switching distribution line L2 is connected to the first switching connecting point P21, and the other end is connected to the sixth switching connecting point P26. The third switching distribution line L3 has one end connected to the second switching connecting point P22 and the other end connected to the fifth switching connecting point P25. The fourth switching distribution line L4 has one end connected to the second switching connecting point P22 and the other end connected to the seventh switching connecting point P27. The fifth switching distribution line L5 has one end connected to the third switching connecting point P23 and the other end connected to the sixth switching connecting point P26. One end of the sixth switching distribution line L6 is connected to the third switching connecting point P23, and the other end is connected to the eighth switching connecting point P28. The seventh switching distribution line L7 has one end connected to the fourth switching connecting point P24 and the other end connected to the seventh switching connecting point P27. The eighth switching distribution line L8 has one end connected to the fifth switching connecting point P25 and the other end connected to the eighth switching connecting point P28.

  A path (feeding path) for supplying power from the first power distribution line L1 to the eighth switching distribution line L8 and the distribution line L from the system power source S and each power storage device 20 to each house H. ) Are formed. The details of the power supply path will be described as appropriate when the processing of the operation of the switching device 30 is described.

  The switching device 30 is for switching the power feeding path. The switching device 30 includes a plurality of switches (from the first switch 31 to the twelfth switch 42). The first switch 31 to the twelfth switch 42 are appropriately provided from the first switching distribution line L1 to the eighth switching distribution line L8 or the distribution line L, and open and close the provided portions. The first switch 31 to the twelfth switch 42 are constituted by, for example, mechanical relays.

  The first switch 31 is provided in the middle of the distribution line L, more specifically, between the first switching connection point P21 and the second switching connection point P22. The second switch 32 is provided in the middle of the first switching distribution line L1. The third switch 33 is provided in the middle of the second switching distribution line L2. The fourth switch 34 is provided in the middle of the distribution line L, more specifically, between the third switching connection point P23 and the fourth switching connection point P24. The fifth switch 35 is provided in the middle of the fifth switching distribution line L5. The sixth switch 36 is provided in the middle of the sixth switching distribution line L6. The seventh switch 37 is provided in the middle of the distribution line L, more specifically, between the fifth switching connection point P25 and the sixth switching connection point P26. The eighth switch 38 is provided in the middle of the eighth switching distribution line L8. The ninth switch 39 is provided in the middle of the distribution line L, more specifically, between the seventh switching connection point P27 and the eighth switching connection point P28. The tenth switch 40 is provided in the middle of the fourth switching distribution line L4. The eleventh switch 41 is provided in the middle of the seventh switching distribution line L7. The twelfth switch 42 is provided in the middle of the third switching distribution line L3.

  The EMS 50 is an energy management system that manages the operation of the power supply system 1. The EMS 50 includes an arithmetic processing unit such as a CPU, a storage unit such as a RAM and a ROM, an input / output unit such as a touch panel, and the like. In the storage unit of the EMS 50, various information, programs, and the like that are used when controlling the operation of the power supply system 1 are stored in advance. The arithmetic processing unit of the EMS 50 can operate the power supply system 1 by executing the program and performing predetermined arithmetic processing using the various information.

  The EMS 50 is electrically connected to each power storage device 20. The EMS 50 is configured so that a predetermined signal can be input from each power storage device 20, and can acquire the accumulated discharge power amount of each power storage device 20.

  The EMS 50 is electrically connected to the switching device 30. The EMS 50 is configured to be able to output a predetermined signal to the switching device 30 and can control the operation of the switching device 30 (opening and closing from the first switch 31 to the twelfth switch 42).

  Below, with reference to FIG. 2, the aspect (supply) of the electric power supply by the electric power supply system 1 is demonstrated. In the following, it is assumed that the switching device 30 is not operating (not operating). In this case, as shown in FIG. 2, the switches (the first switch 31, the fourth switch 34, the seventh switch 37, and the ninth switch 39) provided in the distribution line L are closed. The other switches (second switch 32, third switch 33, fifth switch 35, sixth switch 36, eighth switch 38, and tenth switch 40 to twelfth switch 42) are opened. Thus, in the power supply system 1, power is supplied to each house H only through the distribution line L when the switching device 30 is not operating.

  Moreover, the solid line arrows shown in FIGS. 2 and 5 to 9 indicate the power feeding path (power distribution direction). In FIGS. 2 and 5 to 9, portions of the first switching distribution line L <b> 1 to the eighth switching distribution line L <b> 8 and the distribution line L that are different from the power feeding path are indicated by dotted lines.

  In the state shown in FIG. 2, the electric power from the system power source S is supplied to each house H via the distribution line L according to the power consumption of each house H. In this case, the first power storage device 21 disposed on the most downstream side of the distribution line L among the plurality of power storage devices 20 performs the load following operation based on the detection result of the first sensor 11 to obtain a predetermined amount of power. Discharge power. Thus, the electric power discharged from the first power storage device 21 is supplied to each house H. In addition, when electric power is discharged from the first power storage device 21, the amount of electric power from the system power source S decreases.

  In addition, when the power consumption of each house H cannot be covered only by the power from the first power storage device 21, the insufficient power is supplied from the system power supply S to each house H. That is, power from the system power supply S (power shortage) is supplied to each house H via the distribution line L. In this case, among the plurality of power storage devices 20, the second power storage device 22 arranged on the upstream side of the first power storage device 21 performs the load following operation based on the detection result of the second sensor 12, A predetermined amount of power is discharged. Thus, the electric power discharged from the second power storage device 22 is supplied to each house H. Note that when electric power is discharged from the second power storage device 22, the amount of electric power from the system power source S is further reduced.

  Moreover, when the power consumption of each house H cannot be covered only with the electric power from the 1st electrical storage apparatus 21 and the 2nd electrical storage apparatus 22, the discharge from the 3rd electrical storage apparatus 23 is started. Thus, when electric power is supplied to each house H from the distribution line L, according to the power consumption of each house H, the order of the 1st electrical storage apparatus 21, the 2nd electrical storage apparatus 22, and the 3rd electrical storage apparatus 23 Discharge starts.

  In addition, even if electric power is discharged from the third power storage device 23, if the power consumption of each house H cannot be covered, the insufficient power is purchased from the system power supply S (the power purchased from the system power supply S). Is supplied to each house H).

  Thus, in the power supply system 1, the electric power discharged from each power storage device 20 is supplied not only to the resident (house H) that owns each power storage device 20, but also to other resident (house H). Become. That is, electric power retailers collectively purchase electric power from electric power companies and charge each power storage device 20 (electric power after the resident of each house H pays a fee) as needed between a plurality of houses H. can do.

  Note that the electric power discharged from each power storage device 20 as described above is purchased by a resident who owns each power storage device 20 from a power retailer. In such a configuration, the electric power charged in one power storage device 20 (the power purchased by a resident who owns the one power storage device 20 from an electric power retailer) is converted into a house H that owns the other power storage device 20. In the case of accommodation to (resident), a fee corresponding to the amount of electricity that has been accommodated is finally paid from the resident of the other house H to the resident of one house H.

  If power is accommodated to each house H only through the distribution line L, there may be a problem because the amount of discharge in the plurality of power storage devices 20 is biased.

  Specifically, as described above, in the case where power is accommodated only through the distribution line L (without using the first switching distribution line L1 to the eighth switching distribution line L8), first the first power storage When the discharge of the device 21 is started and the power consumption of each house H cannot be covered, the discharge is started in the order of the second power storage device 22 and the third power storage device 23. For this reason, the amount of discharge increases in order (the order of the first power storage device 21, the second power storage device 22, and the third power storage device 23) from the power storage device 20 arranged on the downstream side in the direction in which power flows. For this reason, the charge (charge paid from the resident of another house H to the resident of one house H) due to the interchange of electric power among the plurality of houses H is the first house H1 that owns the first power storage device 21. Many residents will get.

  In addition, when the power consumed by each house H is covered only by the power discharged from the first power storage device 21, the power is not discharged from the second power storage device 22 and the third power storage device 23. In such a case, only the resident of the first house H <b> 1 that owns the first power storage device 21 obtains the charge for the interchange of power between the plurality of houses H.

  Thus, in the case where power is accommodated in each house H only through the distribution line L, the discharge amount in the plurality of power storage devices 20 is biased, and thus can be obtained among the plurality of houses H (residents). The price was uneven and was a problem. Moreover, since the discharge amount in the plurality of power storage devices 20 is biased, the life (service life) of the plurality of power storage devices 20 becomes uneven, which is a problem.

  Therefore, in the power supply system 1, a process (a process such as setting a predetermined discharge priority order for the discharge of each power storage device 20) is performed by the EMS 50 to suppress the uneven discharge amount in the plurality of power storage devices 20. .

  Below, the process for suppressing the deviation of the discharge amount by such EMS50 is demonstrated. The process is performed, for example, immediately before starting the accommodation of electric power in each house H or after a certain time has elapsed since the start of accommodation.

  The EMS 50 first performs a preset process, and then performs an operation of the switching device 30.

  In the pre-setting process, the EMS 50 sets the discharge priority order. Further, in the processing of the operation of the switching device 30, the EMS 50 specifically operates the switching device 30 based on the discharge priority order. The discharge priority order is a criterion for determining which of the power storage devices 20 is to be preferentially discharged.

  First, the pre-setting process by the EMS 50 will be described below with reference to FIG.

  In step S <b> 101, the EMS 50 acquires the accumulated discharge power amount of each power storage device 20. Thereby, EMS50 acquires the sum total of the electric energy discharged in the last 24 hours in each electrical storage apparatus 20. FIG. EMS50 performs the process of step S102, after performing the process of step S101.

  In step S102, the EMS 50 sets the discharge priority of each power storage device 20 based on the accumulated discharge power amount acquired in step S101. Specifically, the EMS 50 sets a high discharge priority (first rank, second rank, and third rank) for each power storage device 20 in order of decreasing accumulated discharge power amount.

  In this way, the EMS 50 ends the pre-setting process after executing the process of step S102.

  Next, processing of the operation of the switching device 30 according to the first embodiment by the EMS 50 will be described with reference to FIGS. 2 and 4 to 9. The processing of the operation of the switching device 30 is processing for forming a power feeding path in which the power storage devices 20 that are higher in the discharge priority order are arranged in order from the downstream side in the direction in which power flows. The EMS 50 controls the switching device 30 to change the mutual positional relationship (the relationship between the upstream and the downstream) of the respective power storage devices 20 in the direction in which the power flows, and execute the processing. In the operation of the switching device 30, it is assumed that the first switch 31 to the twelfth switch 42 are all open.

  As shown in FIG. 4, in step S <b> 111, the EMS 50 determines whether or not the first power storage device 21 is the first discharge priority. When the EMS 50 determines that the first power storage device 21 is the first in the discharge priority order (YES in step S111), the EMS 50 executes the process of step S112.

  In step S112, the EMS 50 closes the ninth switch 39 (see FIG. 2). EMS50 performs the process of step S113, after performing the process of step S112.

  In step S <b> 113, the EMS 50 determines whether or not the third power storage device 23 is the third highest discharge priority. When the EMS 50 determines that the third power storage device 23 is the third highest discharge priority (YES in step S113), the EMS 50 executes the process of step S114.

  In step S114, as shown in FIGS. 2 and 4, the EMS 50 closes the first switch 31, the fourth switch 34, and the seventh switch 37.

  When the discharge priority is changed from the first to the first power storage device 21, the second power storage device 22, and the third power storage device 23 (YES in steps S111 and 113), the EMS 50 performs such a step S114. Execute the process. Thereby, in step S114, EMS50 switches an electric power feeding path | route so that electric power may be accommodated in each house H only through the distribution line L. FIG. According to this, in the switched power feeding path, the first power storage device 21 (first power storage device connection point P11), the second power storage device 22 (second power storage device connection point P12), Three power storage devices 23 (third power storage device connection point P13) can be arranged. Accordingly, the first power storage device 21 can be preferentially discharged according to the discharge priority order. In addition, when the first power storage device 21 alone cannot provide power, the second power storage device 22 can be discharged preferentially.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S114.

  As shown in FIG. 4, when the EMS 50 determines in step S113 that the third discharge priority is not the third power storage device 23 (NO in step S113), the process of step S115 is executed.

  In step S115, as shown in FIGS. 4 and 5, the EMS 50 closes the second switch 32, the fifth switch 35, and the twelfth switch 42.

  When the discharge priority is changed from the first to the first power storage device 21, the third power storage device 23, and the second power storage device 22 (YES in step S111 and NO in step S113), the EMS 50 The process of step S115 is executed. Thus, in step S115, the EMS 50 accommodates power to each house H via the distribution line L, the first switching distribution line L1, the third switching distribution line L3, and the fifth switching distribution line L5. Switch the power supply path. As a result, in the switched power supply path, from the system power source S to the first switching connection point P21 of the distribution line L, the first switching distribution line L1 and the fourth switching connection point P24 of the distribution line L to the fifth. From the switching point P25, the third switching distribution line L3, the second switching connection point P22 of the distribution line L to the third switching connection point P23, the fifth switching distribution line L5, the sixth of the distribution line L Electric power flows in the order from the switching connection point P26 to each house H.

  According to this, in the switched power supply path, the first power storage device 21 (first power storage device connection point P11), the third power storage device 23 (third power storage device connection point P13), Two power storage devices 22 (second power storage device connection point P12) can be arranged. Accordingly, the first power storage device 21 can be preferentially discharged according to the discharge priority order. In addition, when the first power storage device 21 alone cannot provide power, the third power storage device 23 can preferentially discharge.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S115.

  Also, as shown in FIG. 4, when the EMS 50 determines in step S111 that the first discharge priority is not the first power storage device 21 (NO in step S111), the process of step S116 is executed.

  In step S <b> 116, the EMS 50 determines whether or not the first power discharge priority order is the second power storage device 22. When EMS 50 determines that the first power discharge priority order is second power storage device 22 (YES in step S116), it executes the process of step S117.

  In step S117, the EMS 50 closes the eighth switch 38 (see FIG. 6). The EMS 50 executes the process of step S118 after executing the process of step S117.

  In step S <b> 118, the EMS 50 determines whether or not the third power storage device 21 is the third highest discharge priority. When the EMS 50 determines that the third power storage priority order is the first power storage device 21 (YES in step S118), the EMS 50 executes the process of step S119.

  In step S119, as shown in FIGS. 4 and 6, the EMS 50 closes the third switch 33, the fourth switch 34, and the tenth switch 40.

  When the discharge priority is changed to the second power storage device 22, the third power storage device 23, and the first power storage device 21 in order from the first place (YES in steps S116 and 118), the EMS 50 performs such a step S119. Execute the process. Thereby, in step S119, EMS50 is made to accommodate electric power to each house H via the distribution line L, the 2nd switching distribution line L2, the 4th switching distribution line L4, and the 8th switching distribution line L8. Switch the power supply path. As a result, in the switched power supply path, from the system power source S to the first switching connection point P21 of the distribution line L, the second switching distribution line L2, the sixth switching connection point P26 of the distribution line L to the seventh switching point. From the switching point P27, the fourth switching distribution line L4, the second switching connection point P22 of the distribution line L to the fifth switching connection point P25, the eighth switching distribution line L8, the eighth of the distribution line L Electric power flows in the order from the switching connecting point P28 to each house H.

  According to this, in the switched power supply path, the second power storage device 22 (second power storage device connection point P12), the third power storage device 23 (third power storage device connection point P13), One power storage device 21 (first power storage device connection point P11) can be arranged. Accordingly, the second power storage device 22 can be preferentially discharged according to the discharge priority order. In addition, when the second power storage device 22 alone cannot provide power, the third power storage device 23 can preferentially discharge.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S119.

  As shown in FIG. 4, when the EMS 50 determines in step S118 that the third discharge priority is not the first power storage device 21 (NO in step S118), the process of step S120 is executed.

  In step S120, as shown in FIGS. 4 and 7, the EMS 50 closes the first switch 31, the fifth switch 35, and the eleventh switch 41.

  When the discharge priority is the second power storage device 22, the first power storage device 21, and the third power storage device 23 in order from the first place (YES in step S116 and NO in step S118), the EMS 50 The process of step S120 is executed. Thereby, in step S120, the EMS 50 is adapted to accommodate power to each house H via the distribution line L, the fifth switching distribution line L5, the seventh switching distribution line L7, and the eighth switching distribution line L8. Switch the power supply path. Thus, in the switched power supply path, from the system power source S to the third switching connection point P23 of the distribution line L, the fifth switching distribution line L5, the sixth switching connection point P26 of the distribution line L to the seventh switching point. From the switching point P27, the seventh switching distribution line L7, the fourth switching connection point P24 of the distribution line L to the fifth switching connection point P25, the eighth switching distribution line L8, the eighth of the distribution line L Electric power flows in the order from the switching connecting point P28 to each house H.

  According to this, in the switched power supply path, the second power storage device 22 (second power storage device connection point P12), the first power storage device 21 (first power storage device connection point P11), Three power storage devices 23 (third power storage device connection point P13) can be arranged. Accordingly, the second power storage device 22 can be preferentially discharged according to the discharge priority order. In addition, when the second power storage device 22 alone cannot supply power, the first power storage device 21 can be discharged preferentially.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S120.

  As shown in FIG. 4, when the EMS 50 determines in step S116 that the first discharge priority is not the second power storage device 22 (NO in step S116), the first discharge priority is the third. It judges that it is the electrical storage apparatus 23, and performs the process of step S121.

  In step S121, the EMS 50 closes the sixth switch 36 (see FIG. 8). EMS50 performs the process of step S122, after performing the process of step S121.

  In step S <b> 122, the EMS 50 determines whether or not the third power storage device 21 is the third highest discharge priority. If the EMS 50 determines that the third power discharge priority is the first power storage device 21 (YES in step S122), the EMS 50 executes the process in step S123.

  In step S123, as illustrated in FIGS. 4 and 8, the EMS 50 closes the third switch 33, the eleventh switch 41, and the twelfth switch 42.

  When the discharge priority ranks from the first to the third power storage device 23, the second power storage device 22, and the first power storage device 21 (NO in step S116 and NO in step S122), the EMS 50 The process of step S123 is executed. Thereby, in step S123, the EMS 50 uses the distribution line L, the second switching distribution line L2, the seventh switching distribution line L7, the third switching distribution line L3, and the sixth switching distribution line L6. The power supply path is switched so that power is accommodated in H. As a result, in the switched power supply path, from the system power source S to the first switching connection point P21 of the distribution line L, the second switching distribution line L2, the sixth switching connection point P26 of the distribution line L to the seventh switching point. From switching point P27, seventh switching distribution line L7, fourth switching connection point P24 of distribution line L to fifth switching connection point P25, third switching distribution line L3, second of distribution line L From the switching connection point P22 to the third switching connection point P23, power flows in the order from the sixth switching distribution line L6 and the eighth switching connection point P28 of the distribution line L to each house H.

  According to this, in the switched power feeding path, the third power storage device 23 (third power storage device connection point P13), the second power storage device 22 (second power storage device connection point P12), One power storage device 21 (first power storage device connection point P11) can be arranged. Accordingly, the third power storage device 23 can be preferentially discharged according to the discharge priority order. In addition, when the third power storage device 23 alone cannot supply power, the second power storage device 22 can be discharged preferentially.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S123.

  As shown in FIG. 4, when the EMS 50 determines in step S122 that the third discharge priority is not the first power storage device 21 (NO in step S122), the process of step S124 is executed.

  In step S124, as shown in FIGS. 4 and 9, the EMS 50 closes the second switch 32, the seventh switch 37, and the tenth switch 40.

  When the power priority is changed from the first power to the third power storage device 23, the first power storage device 21, and the second power storage device 22 (NO in steps S116 and 122), the EMS 50 determines such a step S123. Execute the process. Thereby, in step S123, the EMS 50 is adapted to accommodate power to each house H via the distribution line L, the first switching distribution line L1, the fourth switching distribution line L4, and the sixth switching distribution line L6. Switch the power supply path. As a result, in the switched power supply path, from the system power source S to the first switching connection point P21 of the distribution line L, the first switching distribution line L1, the fourth switching connection point P24 of the distribution line L to the seventh switching point. From the switching point P27, the fourth switching distribution line L4, the second switching connection point P22 of the distribution line L to the third switching connection point P23, the sixth switching distribution line L6, the eighth of the distribution line L Electric power flows in the order from the switching connecting point P28 to each house H.

  According to this, in the switched power supply path, the third power storage device 23 (third power storage device connection point P13), the first power storage device 21 (first power storage device connection point P11), Two power storage devices 22 (second power storage device connection point P12) can be arranged. Accordingly, the third power storage device 23 can be preferentially discharged according to the discharge priority order. Further, when the third power storage device 23 alone cannot cover the power, the first power storage device 21 can be discharged preferentially.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S124.

  As described above, the EMS 50 switches the power supply path according to the set discharge priority order (so as to be arranged on the downstream side in order from the first discharge priority order), whereby the power storage device 20 having a small accumulated discharge power amount. Can be preferentially discharged. According to this, it is possible to eliminate the bias of the discharge power amount (bias of the accumulated discharge power amount) in each power storage device 20. This makes it possible to equalize the charges that can be obtained among a plurality of houses H (residents).

  Further, by eliminating the bias generated in the amount of discharge power in each power storage device 20, the bias in the number of charge / discharge cycles in each power storage device 20 can also be canceled. In this way, since the number of times of charging / discharging in each power storage device 20 can be equalized, the life (lifetime) in each power storage device 20 can be equalized.

  Further, according to the power supply system 1, the power supply path can be switched so as to be arranged in order from the first power storage device 20 in the discharge priority order. For this reason, when accumulating electric power in each house H, each power storage device 20 is discharged in the order according to the priority order only by performing the load following operation based on the detection result of the sensor of the corresponding sensor unit 10. Can do. Thereby, electric power can be interchanged easily in each house H (without performing special control with respect to each power storage device 20 while accumulating electric power).

  Next, processing of the operation of the switching device 30 according to the second embodiment by the EMS 50 will be described using FIGS. 10 and 11 and the like.

  Note that the processing of the operation of the switching device 30 according to the second embodiment differs greatly from the processing of the operation of the switching device 30 according to the first embodiment in that the processing of step S211 is added. Specifically, the EMS 50 executes the process of step S211 before (first) the process of step S111.

  As shown in FIG. 10, in step S211, the EMS 50 closes the first switch 31, the fourth switch 34, the seventh switch 37, and the ninth switch 39 provided in the distribution line L. In addition, the EMS 50 closes the first switch 31 and the like, and then switches the other switches (second switch 32, third switch 33, fifth switch 35, sixth switch 36, eighth switch 38, tenth switch). 40 to the twelfth switch 42) are opened (see FIG. 2). Thereby, EMS50 switches a power feeding path so that power may be accommodated in each house H in advance only through the distribution line L, regardless of the contents of the discharge priority order. The EMS 50 executes the process of step S111 after executing the process of step S211.

  In step S111, if the EMS 50 determines that the first power storage device 21 is the first in the discharge priority order (YES in step S111), the process of step S113 is executed (step S112 according to the first embodiment). Do not execute the process. This is because the ninth switch 39 is already closed in step S211 (the process corresponding to step S112 is being executed).

  If the EMS 50 determines in step S113 that the third discharge priority is not the third power storage device 23 (NO in step S113), the process of step S115 is executed. Thereby, as shown in FIGS. 10 and 11, the EMS 50 closes the second switch 32, the fifth switch 35, and the twelfth switch 42 (the power is supplied to each house H from the power supply path to be switched). In a state where it can be accommodated).

  EMS50 makes the electric power which distribute | circulates the distribution line L distribute | circulate also to the 1st distribution line L1 by making the 2nd switch 32 into a closed state. Further, the EMS 50 closes the twelfth switch 42 so that the power flowing through the distribution line L is also distributed to the third switching distribution line L3. Further, the EMS 50 closes the fifth switch 35 so that the power flowing through the distribution line L is also distributed to the fifth switching distribution line L5.

  EMS50 performs the process of step S212, after performing the process of step S115.

  In step S212, the EMS 50 opens the first switch 31, the fourth switch 34, and the seventh switch 37 (see FIG. 5). Thereby, EMS50 switches an electric power feeding path so that the 1st electrical storage apparatus 21, the 3rd electrical storage apparatus 23, and the 2nd electrical storage apparatus 22 may be arrange | positioned in order from a downstream according to a discharge priority.

  According to this, the switch provided in the power feeding path to be switched while maintaining the energized state (step S211) is closed (step S115), and then provided at a location different from the power feeding path to be switched. The switch can be opened (step S212). Thereby, in the process of operation | movement of the switching apparatus 30, since an energized state can always be maintained, it can prevent that a temporary power failure generate | occur | produces. Further, before switching the power feeding path, the first switching distribution line L1, the third switching distribution line L3, the fifth switching distribution line L5, and the distribution line L are set to the same potential (power feeding in different potential states). Route switching can be prevented). As a result, the power feeding path can be switched without generating noise or surge.

  The EMS 50 ends the process of the operation of the switching device 30 after executing the process of step S212.

  The EMS 50 appropriately executes the same processing as in steps S115 and S212 according to the discharge priority order.

  Specifically, when EMS 50 determines in step S118 that the third power discharge priority is the first power storage device 21 (YES in step S118), it executes step S213. In step S213, the EMS 50 closes the third switch 33 and the tenth switch 40. Since the fourth switch 34 is already closed in step S211, the EMS 50 does not control the fourth switch 34 in step S213 (the process is different from step S119 according to the first embodiment). . The EMS 50 executes the process of step S214 after executing the process of step S213. In step S214, the EMS 50 opens the first switch 31, the seventh switch 37, and the ninth switch 39 (see FIG. 6).

  If EMS 50 determines in step S118 that the third discharge priority is not the first power storage device 21 (NO in step S118), it executes step S215. In step S215, the EMS 50 closes the fifth switch 35 and the eleventh switch 41. Since the first switch 31 is already closed in step S211, the EMS 50 does not control the first switch 31 in step S215 (the process is different from step S120 according to the first embodiment). . EMS50 performs the process of step S216, after performing the process of step S215. In step S216, the EMS 50 opens the fourth switch 34, the seventh switch 37, and the ninth switch 39 (see FIG. 7).

  Further, when the EMS 50 determines in step S122 that the third power discharge priority is the first power storage device 21 (YES in step S122), the EMS 50 executes steps S123 and S217. Thus, the EMS 50 closes the third switch 33 and the like in step S123, and then opens the first switch 31, the fourth switch 34, the seventh switch 37, and the ninth switch 39 in step S217 ( (See FIG. 8).

  If EMS 50 determines in step S122 that the third discharge priority is not the first power storage device 21 (NO in step S122), step 218 is executed. In step S218, the EMS 50 closes the second switch 32 and the tenth switch 40. Since the seventh switch 37 is already closed in step S211, the EMS 50 does not control the seventh switch 37 in step S218 (the process is different from step S124 according to the first embodiment). . EMS50 performs the process of step S219 after performing the process of step S218. In step S219, the EMS 50 opens the first switch 31, the fourth switch 34, and the ninth switch 39 (see FIG. 9).

  If the EMS 50 determines that the third power storage device 23 is the third highest discharge priority in step S113 (YES in step S113), the EMS 50 ends the operation processing of the switching device 30 (in the first embodiment). The process of step S114 is not executed). This is because the first switch 31, the fourth switch 34, and the seventh switch 37 have already been closed in step S211 (the process corresponding to step S114 is being performed). In step S211, the EMS 50 switches the power supply path without causing noise, surge, or temporary power failure in order to open the other switches after closing the first switch 31 and the like. it can.

  According to the above, the power supply system 1 according to the second embodiment can prevent temporary power outages, noises, and surges from occurring in switching of all power supply paths.

  Next, the power supply system 301 according to the third embodiment will be described with reference to FIGS.

  As shown in FIG. 12, the power supply system 301 according to the third embodiment is the power supply according to the first embodiment in that power is interchanged between two houses H (first house H1 and second house H2). This is a major difference from the system 1.

  The power supply system 301 according to the third embodiment mainly includes a sensor unit 310, a plurality of power storage devices 320, a switching device 330, and an EMS 350.

  The sensor unit 310 is configured in the same manner as the sensor unit 10 according to the first embodiment except that the third sensor 13 is not provided. The plurality of power storage devices 320 are configured similarly to the plurality of power storage devices 20 according to the first embodiment, except that the third power storage device 23 is not provided.

  A distribution line L connected to each power storage device 320 (distribution line L extending in the left-right direction from the system power supply S to each house H in FIG. 12) has a plurality of switching connection points (from the first switching connection point P321). Up to a sixth switching connecting point P326). The first switching connection point P321 to the sixth switching connection point P326 are sequentially arranged in the distribution line L from the upstream side (system power supply S side) to the downstream side (house H side).

  More specifically, the first switching connection point P <b> 21 and the second switching connection point P <b> 22 are provided between the system power supply S and the second sensor 12. The second switching connection point P <b> 22 is provided immediately upstream of the second sensor 12. Third switching connection point P23 is provided immediately downstream of second power storage device connection point P12. The fourth switching connection point P24 is provided immediately upstream of the first sensor. The fifth switching connection point P25 is provided immediately downstream of the first power storage device connection point P11. The sixth switching connecting point P26 is provided immediately upstream of the downstream end portion (the branching portion) of the distribution line L.

  A plurality of switching distribution lines (from the first switching distribution line L301 to the third switching distribution line L303) are appropriately connected from the first switching connection point P321 to the sixth switching connection point P326. The

  More specifically, the first switching distribution line L301 has one end connected to the first switching connecting point P321 and the other end connected to the fourth switching connecting point P324. The second switching distribution line L302 has one end connected to the second switching connecting point P322 and the other end connected to the fifth switching connecting point P325. The third switching distribution line L303 has one end connected to the third switching connecting point P323 and the other end connected to the sixth switching connecting point P326.

  A plurality of power supply paths are formed by the distribution line L from the first switching distribution line L301 to the third switching distribution line L303. The details of the power supply path will be described as appropriate when the processing of the operation of the switching device 330 is described.

  The switching device 330 includes a first switch 331 to a sixth switch 336. The first switch 331 to the sixth switch 336 are configured by, for example, mechanical relays.

  The first switch 331 is provided in the middle of the distribution line L, more specifically, between the first switching connection point P321 and the second switching connection point P322. The second switch 332 is provided in the middle of the first switching distribution line L301. The third switch 333 is provided in the middle of the distribution line L, more specifically, between the third switching connection point P323 and the fourth switching connection point P324. The fourth switch 334 is provided in the middle of the second switching distribution line L302. The fifth switch 335 is provided in the middle of the distribution line L, more specifically, between the fifth switching connection point P325 and the sixth switching connection point P326. The sixth switch 336 is provided in the middle of the third switching distribution line L303.

  The EMS 350 is configured in substantially the same manner as the EMS 50 according to the first embodiment. The EMS 350 is configured to be able to output a predetermined signal to the switching device 330, and can control the operation of the switching device 330 (open / close from the first switch 331 to the sixth switch 336).

  Below, the process for suppressing the deviation of the discharge amount by EMS350 which concerns on 3rd embodiment is demonstrated.

  The EMS 350 first performs a preset process as in the first embodiment to set the discharge priority (see FIG. 3). Thereafter, the EMS 350 performs processing of the operation of the switching device 330.

  Next, processing of the operation of the switching device 330 according to the third embodiment by the EMS 350 will be described using FIGS. 13 to 15. In the operation of the switching device 330, it is assumed that the first switch 331 to the sixth switch 336 are all open. Moreover, the solid line arrow shown in FIG.14 and FIG.15 shows the electric power feeding path (electric power distribution direction). In FIGS. 14 and 15, the first switching distribution line L301 to the third switching distribution line L303 and the part of the distribution line L that is different from the power feeding path are indicated by dotted lines.

  As shown in FIG. 13, in step S <b> 311, the EMS 350 determines whether or not the first power storage device 21 is the first discharge priority. When EMS 350 determines that the first power storage device 21 is the first in the discharge priority order (YES in step S311), it executes the process of step S312.

  In step S312, as shown in FIGS. 13 and 14, the EMS 350 closes the first switch 331, the third switch 333, and the fifth switch 335.

  The EMS 350 executes the process of step S312 when the discharge priority order is the first power storage device 21 and the second power storage device 22 in order from the first place (YES in step S311). Thereby, in step S312, EMS350 switches an electric power feeding path | route so that electric power may be accommodated in each house H only through the distribution line L. FIG. According to this, the first power storage device 21 (first power storage device connection point P11) and the second power storage device 22 (second power storage device connection point P12) are arranged in order from the downstream side in the switched power supply path. can do. Accordingly, the first power storage device 21 can be preferentially discharged according to the discharge priority order. In addition, when the first power storage device 21 alone cannot provide power, the second power storage device 22 can be discharged preferentially. Note that the power supply path (power supply path shown in FIG. 14) that is switched in the process of step S <b> 312 is also used when the switching device 330 is not operating.

  The EMS 350 ends the processing of the operation of the switching device 330 after executing the processing of step S312.

  As shown in FIG. 13, when the EMS 350 determines in step S311 that the first discharge priority is not the first power storage device 21 (NO in step S311), the process of step S313 is executed.

  In step S313, as shown in FIGS. 13 and 15, the EMS 350 closes the second switch 332, the fourth switch 334, and the sixth switch 336.

  The EMS 350 executes such a process of step S313 when the discharge priority ranks from the first to the second power storage device 22 and the first power storage device 21 (NO in step S311). Thereby, in step S313, the EMS 350 switches the power feeding path so as to accommodate power to each house H via the distribution line L and the first switching distribution line L301 to the third switching distribution line L303. Thus, in the switched power supply path, from the system power source S to the first switching connection point P321 of the distribution line L, the first switching distribution line L301 and the fourth switching connection point P324 of the distribution line L to the fifth. From switching point P325, second switching distribution line L302, second switching connection point P322 of distribution line L to third switching connection point P323, third switching distribution line L303, sixth of distribution line L Electric power flows in the order from the switching connection point P326 to each house H.

  According to this, the second power storage device 22 (second power storage device connection point P12) and the first power storage device 21 (first power storage device connection point P11) are arranged in this order from the downstream side in the switched power supply path. can do. Accordingly, the second power storage device 22 can be preferentially discharged according to the discharge priority order. In addition, when the second power storage device 22 alone cannot supply power, the first power storage device 21 can be discharged.

  The EMS 350 ends the process of the operation of the switching device 330 after executing the process of step S313.

  As described above, the power supply system 301 according to the third embodiment can eliminate the uneven discharge amount (bias of accumulated discharge power amount) in the two power storage devices 320. This makes it possible to equalize the charges that can be obtained between the two houses H (residents). In addition, by eliminating the bias generated in the discharge amount in the two power storage devices 320, the bias in the number of charge / discharge cycles in the two power storage devices 320 can also be canceled.

  Next, processing of the operation of the switching device 330 according to the fourth embodiment by the EMS 350 will be described with reference to FIGS.

  Note that the operation processing of the switching device 330 according to the fourth embodiment differs greatly from the operation processing of the switching device 330 according to the third embodiment in that the processing of step S411 is added. Specifically, the EMS 350 performs the process of step S411 before (first) the process of step S311.

  As shown in FIG. 16, in step S411, the EMS 350 closes the first switch 331, the third switch 333, and the fifth switch 335 provided in the distribution line L. In addition, the EMS 350 closes the first switch 331 and the like, and then opens the other switches (the second switch 332, the fourth switch 334, and the sixth switch 336). Thereby, EMS350 switches a power feeding path so that electric power may be accommodated in each house H through only the distribution line L in advance regardless of the contents of the discharge priority order. EMS350 performs the process of step S311 after performing the process of step S411.

  In step S311, when the EMS 350 determines that the first discharge priority is not the first power storage device 21 (NO in step S311), the process of step S313 is executed. Thereby, as shown in FIGS. 16 and 17, the EMS 350 closes the second switch 332, the fourth switch 334, and the sixth switch 336. Thus, the EMS 350 closes all the switches (from the first switch 331 to the sixth switch 336) in step S311.

  The EMS 350 closes the second switch 332 so that the power flowing through the distribution line L is also distributed to the first switching distribution line L301. In addition, the EMS 350 closes the fourth switch 334 so that the power flowing through the distribution line L is also distributed to the second switching distribution line L302. Further, the EMS 350 closes the sixth switch 336 so that the power flowing through the distribution line L is also distributed to the third switching distribution line L303.

  EMS350 performs the process of step S412 after performing the process of step S313.

  In step S412, the EMS 350 opens the first switch 331, the third switch 333, and the fifth switch 335 (see FIG. 15). Thereby, EMS350 switches a power feeding path so that the 2nd electrical storage apparatus 22 and the 1st electrical storage apparatus 21 may be arrange | positioned in order from a downstream side according to a discharge priority.

  According to this, the switch provided in the power feeding path to be switched while maintaining the energized state (step S411) is closed (step S313), and then provided at a location different from the power feeding path to be switched. The switch can be opened (step S412). Thereby, in the process of operation | movement of the switching apparatus 30, since an energized state can always be maintained, it can prevent that a temporary power failure generate | occur | produces. In addition, before the power supply path is switched in step S412, the distribution line L from the first switching distribution line L301 to the third switching distribution line L303 can be set to the same potential. As a result, the power feeding path can be switched without generating noise or surge.

  The EMS 350 ends the process of the operation of the switching device 330 after executing the process of step S412.

  Note that when the EMS 350 determines in step S311 that the first priority of the discharge priority is the first power storage device 21 (YES in step S311), the process of the operation of the switching device 330 ends (in the third embodiment). The process of step S312 is not executed). This is because the first switch 331 and the like have already been closed in step S411 (the process corresponding to step S312 is being performed).

  According to the above, the power supply system 301 according to the fourth embodiment can prevent temporary power outages, noises, and surges from occurring when switching the power feeding path even when power is accommodated in the two houses H. .

  In the first embodiment to the fourth embodiment, the case where the number of power storage devices 20 and 320 is two or three has been described. However, the number of power storage devices 20 and 320 (the number of each house H) Can be any number greater than or equal to two. If the number of power storage devices 20 and 320 is N, the number of switches of the switching devices 30 and 330 may satisfy the following relationship.

  That is, among the switches of the switching devices 30 and 330, the number of switches provided on the distribution line L may be N + 1. The N + 1 switches are connected between the power supply S and the power storage devices 20 and 320 closest to the system power supply S, between the power storage devices 20 and 320, and between the power storage devices 20 and 320 closest to the house H and the home H. What is necessary is just to respectively arrange | position between. In such a distribution line L, the upstream end is connected to the system power source S and the downstream end is connected to each house H, and sensors of the sensor units 10 and 110 are appropriately provided in the middle. In addition, the distribution line L has predetermined distribution lines whose one end is connected to each of the power storage devices 20 and 320 via power storage device connection points P11 to P13 (power storage device connection points P11 to P13 and each power storage device). 20/320) is connected.

In addition, the distribution line L may be appropriately connected with N ² -1 switching distribution lines. One switch may be provided for each of the N ² -1 switching distribution lines. That is, among the switches of the switching devices 30 and 330, the number of switches provided in the switching distribution line may be N ² −1.

The EMSs 50 and 350 appropriately switch the N + 1 switches and N ² −1 switches of the switching devices 30 and 330, so that the discharge power amount bias (integrated discharge) in the N power storage devices 20 and 320 is switched. It is possible to eliminate the deviation of the electric energy.

As described above, the power supply systems 1 and 101 according to the present embodiment are
A plurality of power storage devices 20 and 320 capable of discharging power to each house H (load) via the distribution lines L, L1 to L8, L301 to L303;
Switching devices 30 and 330 that change the mutual positional relationship of the plurality of power storage devices 20 and 320 in the direction of power distribution by switching power feeding paths in the distribution lines L·L1 to L8 and L301 to L303;
The accumulated discharge power amount of the power storage devices 20 and 320 is acquired, and the priority order of discharge of the power storage devices 20 and 320 is set in the order of the acquired cumulative discharge power amount, and the operation of the switching devices 30 and 330 is performed. EMS 50 and 350 (control unit) for switching the power supply path so that the power storage devices 20 and 320 with higher priority are arranged on the downstream side in the power distribution direction,
It comprises.

  By comprising in this way, it can prevent effectively that discharge and charge are biased to the specific electrical storage apparatus 20 * 320 among several electrical storage apparatuses 20 * 320.

In addition, the switching devices 30 and 330 include:
The distribution lines L·L1 to L8 · L301 to L303 have a plurality of switches 31 to 42 and 331 to 336 (opening and closing mechanisms) that open and close the provided portions, and the switches 31 to 42,331 The power feeding path is switched by opening and closing 336.

  With this configuration, the power feeding path can be easily switched.

In addition, the power storage devices 20 and 320 include
N are connected to the distribution lines L·L1 to L8 · L301 to L303,
In the distribution lines L·L1 to L8 · L301 to L303,
Distribution line L (first distribution line) from the system power source S to each house H,
A plurality of switching distribution lines L1 to L8 and L301 to L303 (second distribution lines) connected to two different points on the distribution line L;
Contains
The plurality of switches 31 to 42 and 331 to 336 include
N + 1 switches 31, 34, 37, 39, 331, 333, 335 provided on the distribution line L;
N ² -1 switches 32, 33, 35, 36, 38, 40, 41, 42, 332, 334, and 336 provided in the switching distribution lines L 1 to L 8, L 301 to L 303,
Is included.

  With such a configuration, it is possible to effectively prevent the discharge or charge from being biased to a specific power storage device 20/320 among the N power storage devices 20/320.

The EMS 50/350 is
While the power feeding path is switched from the first power feeding path to the second power feeding path different from the first power feeding path, the third power feeding path is held in a state where power can be supplied.

  With this configuration, it is possible to switch the power feeding path without causing a temporary power failure, noise, or surge.

The third power supply path is
This is a power feeding path used when the switching devices 30 and 330 are not operating.

  With this configuration, it is possible to switch the power feeding path without causing a temporary power failure, noise, or surge. Further, the energized state can be maintained using a simple power supply path.

In addition, the house H which concerns on this embodiment is one Embodiment of load.
Moreover, EMS50 * 350 which concerns on this embodiment is one Embodiment of a control part.
The switches 31 to 42 and 331 to 336 according to the present embodiment are an embodiment of an opening / closing mechanism.
Moreover, the distribution line L which concerns on this embodiment is one form of embodiment of a 1st distribution line.
Moreover, each switching distribution line L1-L8 * L301-L303 which concerns on this embodiment is one Embodiment of a 2nd distribution line.
In addition, the switches 31, 34, 37, 39, 331, 333, and 335 according to the present embodiment are an embodiment of an opening / closing mechanism provided in the first distribution line.
Moreover, switch 32 * 33 * 35 * 36 * 38 * 40 * 41 * 42 * 332 * 334 * 336 which concerns on this embodiment is one Embodiment of the opening / closing mechanism provided in a 2nd distribution line.

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

  For example, in the above-described embodiment, the power purchased by the power retailer from the power company is supplied (accommodated) appropriately among the plurality of houses H. However, the power retailer purchases from the power company in a lump. Not necessary.

  Each of the power storage devices 20 and 320 includes a power generation device (for example, a solar power generation device) that generates power using natural energy, a power generation device (for example, a fuel device) that generates power using a predetermined fuel, and the like. It may be a configuration.

  Moreover, the predetermined period when calculating the integrated discharge electric energy is not limited to the latest 24 hours, and can be arbitrarily set.

  In addition, the calculation of the integrated discharge power amount is not necessarily performed by each of the power storage devices 20 and 320, and may be performed by the EMSs 50 and 350, for example.

  Further, for setting the discharge priority order, an integrated discharge power amount that is the sum of the amounts of power discharged during a predetermined period (the most recent 24 hours in the present embodiment) is used. An accumulated charge energy that is the sum of the amounts of energy charged during the period may be used, or both the accumulated discharge energy and the accumulated charge energy may be used.

  Moreover, although each switch 31-42 * 331-336 of the switching apparatus 30 * 330 shall be comprised by a mechanical relay, it is not limited to this, It is comprised by a semiconductor relay, Also good.

  Moreover, although EMS50 which concerns on 2nd embodiment made the switch (1st switch 31, the 4th switch 34, the 7th switch 37, and the 9th switch 39) provided in the distribution line L in step S211 closed, step The switch to be closed in S211 is not limited to this. In step S211, the EMS 50 may close the switch so that power can be accommodated from one of the power supply paths to each house H. For example, the EMS 50 may close the third switch 33, the sixth switch 36, the eleventh switch 41, and the twelfth switch 42 (see FIG. 8). As described above, the path (third power supply path) that is maintained in a power supplyable state while switching the power supply path may be a power supply path that is not used when the switching device 30 is not operating. The same applies to step S411 according to the fourth embodiment. That is, the EMS 350 according to the fourth embodiment may close the second switch 332, the fourth switch 334, and the sixth switch 336 in step S411.

DESCRIPTION OF SYMBOLS 1 Electric power supply system 20 Electric power storage apparatus 30 Switching apparatus 50 EMS (control part)
H Housing (load)
L distribution line L1-L8 switching distribution line (distribution line)

Claims (5)

A plurality of power storage devices capable of discharging power to a load via a distribution line;
A switching device that changes the positional relationship between the plurality of power storage devices in the direction of power distribution by switching the power feeding path in the distribution line;
By acquiring the cumulative discharge power amount of the power storage device, setting the priority order of discharge of the power storage device in the order of the acquired cumulative discharge power amount, and controlling the operation of the switching device, the priority order A control unit that switches the power supply path so that the higher-order power storage device is arranged on the downstream side in the power flow direction,
Comprising
Power supply system. The switching device is
Provided in the distribution line, and having a plurality of opening and closing mechanisms for opening and closing the provided portion, and switching the power feeding path by opening and closing the plurality of opening and closing mechanisms,
The power supply system according to claim 1. The power storage device
N pieces are connected to the distribution line,
In the distribution line,
A first distribution line from the system power supply to the load;
A plurality of second distribution lines connected to two different points on the first distribution line;
Contains
In the plurality of opening / closing mechanisms,
N + 1 opening / closing mechanisms provided on the first distribution line;
N ² -1 opening and closing mechanisms provided on the second distribution line;
Included,
The power supply system according to claim 2. The controller is
While switching the power feeding path from the first power feeding path to a second power feeding path different from the first power feeding path, hold the third power feeding path in a state where power can be supplied,
The power supply system according to any one of claims 1 to 3. The third feeding path is
The power supply path used when the switching device is not operating,
The power supply system according to claim 4.

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