Patent Publication Number: US-2021167602-A1

Title: Control apparatus and control method

Description:
TECHNICAL FIELD 
     The present invention relates to a control apparatus and control method. 
     BACKGROUND ART 
     Currently, introduction of a storage battery apparatus is being promoted in a consumer facility such as a home, commercial facility, school, or the like, for purpose of disaster prevention, BCP, peak shaving, or the like. The storage battery apparatus is controlled by a control apparatus referred to as an EMS (Energy Management System) and performs charge and discharge for the purpose as needed. 
     Here, when there is a plurality of the customer&#39;s facilities having the storage battery apparatus, a way of use of the storage battery apparatus is not always optimized for the plurality of customer&#39;s facilities (community) as a whole, even when the EMS of each of the customer&#39;s facilities individually controls the storage battery apparatus in an optimized manner. 
     On the other hand, a control system controlling charge and discharge of a plurality of storage battery apparatuses belonging to different consumer&#39;s facilities is described in Patent Literature 1. The control system charges each of the storage battery apparatuses during nighttime power hours when an electricity charge is low and performs drive control to discharge sequentially each of the storage battery apparatuses each predetermined time during daytime when a power usage amount becomes high. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Application Publication No. 2003 - 299251   
     SUMMARY OF THE INVENTION 
     A control apparatus according to a first disclosure is an apparatus that controls charge and discharge of a plurality of storage battery apparatuses belonging to different consumer&#39;s facilities. The control apparatus includes at least one processor. The at least one processor is configured to execute: a reception process of receiving a request of charge or discharge to a target storage battery apparatus included in the plurality of storage battery apparatuses, and an allocation process of allocating, to the storage battery apparatus other than the target storage battery apparatus out of the plurality of storage battery apparatuses, at least a part of a request charge and discharge amount that is a charge amount or discharge amount corresponding to the request received by the reception process, so as to suppress deterioration of the target storage battery apparatus. 
     A control method according to a second disclosure includes controlling charge and discharge of a plurality of storage battery apparatuses belonging to different consumer&#39;s facilities. The controlling includes: receiving a request of charge or discharge to a target storage battery apparatus included in the plurality of storage battery apparatuses, and allocating, to the storage battery apparatus other than the target storage battery apparatus out of the plurality of storage battery apparatuses, at least a part of a request charge and discharge amount that is a charge amount or discharge amount corresponding to the received request, so as to suppress deterioration of the target storage battery apparatus. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram illustrating a configuration of a control system according to an embodiment. 
         FIG. 2  is a diagram illustrating a configuration of a control server according to an embodiment. 
         FIG. 3  is a diagram illustrating an example of data regarding to each of storage battery apparatuses in which a database according to an embodiment stores. 
         FIG. 4  is a diagram illustrating an example of a charge and discharge request message according to an embodiment. 
         FIG. 5  is a diagram illustrating a first example of an operation sequence in a control system according to an embodiment. 
         FIG. 6  is a diagram illustrating a second example of an operation sequence in a control system according to an embodiment. 
         FIG. 7  is a diagram illustrating an example a charge and discharge allocation flow (Step S 103  of  FIG. 5 , Step S 202  of  FIG. 6 ) in a control system according to an embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     A control system described in Patent Literature  1  merely perform charge and discharge control of each of storage battery apparatuses according to a predetermined and fixed charge and discharge plan and there is a problem that suppressing deterioration of each of the storage battery apparatuses is not taken into account. 
     Concretely, deterioration degree varies depending on a state of the storage battery apparatus even when same charge and discharge control is performed. For example, as a general characteristic of a lithium-ion battery, deterioration of the storage battery apparatus is smaller when a power storage amount is controlled at around 50% than when it is controlled near full or empty. Also, as for charge and discharge speed, the deterioration degree is smaller in a case of charging and discharging at low speed than in a case of rapid speed. Further, as for temperature, charge and discharge at high temperature or low temperature will lead to deterioration. 
     Then, the present disclosure is possible to suppress deterioration of each of the storage battery apparatuses, while controlling integrally charge and discharge of a plurality of storage battery apparatuses. 
     A control apparatus according to embodiments is an apparatus that controls charge and discharge of a plurality of storage battery apparatuses belonging to different consumer&#39;s facilities. The control apparatus includes at least one processor. The at least one processor executes a reception process of receiving a request of charge or discharge to a target storage battery apparatus included in the plurality of storage battery apparatuses, and an allocation process of allocating, to the storage battery apparatus other than the target storage battery apparatus out of the plurality of storage battery apparatuses, at least a part of a request charge and discharge amount which is a charge or discharge amount corresponding to the request received by the reception process, to suppress deterioration of the target battery storage apparatus. 
     It will be described with reference to the drawings about a control system according to an embodiment. Further, in the following description of the drawings, same or similar parts are marked with same or similar signs. 
     (Configuration of Control System) 
       FIG. 1  is a diagram illustrating a configuration of a control system  1  according to the present embodiment. As illustrated in  FIG. 1 , the control system  1  includes a plurality of facilities  100 , and control server  200 . Each of the facilities  100  and the control server  200  is connected to a communication network  20 . The communication network  20  may include an internet or dedicated channel such as a VPN (Virtual Private Network) or the like. 
     In  FIG. 1 , as the plurality of facilities  100 , facilities  100 A to  300 C are exemplified. One facility  100  corresponds to one consumer&#39;s facility. Each of the facilities  100  is connected to a power grid  10 . A flow of power from the power grid  10  to the facility  100  is called to as a flow, and a flow of power from the facility  100  to the power grid  10  is called to as a backward flow. The power grid  10  may be a power transmission network outside of the consumer&#39;s facility in a case of power sharing between the consumer&#39;s facilities in a region separated from a power company. 
     The facility  100  includes a storage battery apparatus  110  and EMS (Energy Management System)  120 . 
     The storage battery apparatus  110  is an apparatus that performs charge and discharge under control of the EMS  120 . The storage battery apparatus  110  is a lithium-ion storage battery apparatus, lead storage battery apparatus, nickel⋅metal hydride storage battery apparatus, or the like. The storage battery apparatus  110  charges a power supplied from the power grid  10 , for example. A power that the storage battery apparatus  110  discharges may be supplied to a load device in the facility  100  or to the power grid  10 . 
     The EMS  120  is an apparatus that manages a power of the facility  100  (consumer&#39;s facility). The EMS  120  is an example of a management apparatus managing the power of the consumer&#39;s facility. The EMS  120  creates a control plan controlling charge and discharge of the storage battery apparatus  110  of the facility  100  corresponding to power demand of the facility  100 . The EMS  120  creates the control plan optimized in the facility  100 . The EMS  120  transmits a charge and discharge request to the control server  200  according to the created control plan. At this time, the EMS  120  cannot request more than capability of the storage battery apparatus  110  of the facility  100  (capacity, output, or power storage amount). 
     The control server  200  is an apparatus that controls integrally charge and discharge of the storage battery apparatus  110  of the facility  100 . The control server  200  is an example of a control apparatus controlling the charge and discharge of a plurality of the storage battery apparatuses  110  belonging to different consumer&#39;s facilities. For example, the control server  200  is managed by a power generation operator, a power transmission and distribution business operator, or power operator such as a retailer or the like. 
     In the present embodiment, a plurality of the consumer&#39;s facilities corresponding to the plurality of facilities  100  has a contract to the power operator corresponding to the control server  200 , and a power community is formed by the plurality of consumer&#39;s facilities and the power operator. In the power community, the plurality of consumer&#39;s facility can utilize each of the storage battery apparatuses  110  each other. Concretely, it is possible to perform allocation of the charge and discharge such that the storage battery apparatus  110  of one facility  100  performs charge and discharge to a charge and discharge request to the storage battery apparatus  110  of the other facility  100 . Here, in whole of the power community, even when the storage battery apparatus  110  is utilized with each other, a total flow amount or total backward flow amount of the whole of the power community is same as that the storage battery apparatus  110  is not be utilized with each other. 
     The control server  200  allocates at least a part of a requested charge amount or discharge amount to the storage battery apparatus  110  other than a target storage battery apparatus so as to suppress deterioration of the target storage battery apparatus to which charge or discharge is requested. Concretely, the control server  200  allocates, to at least one the storage battery apparatus out of the plurality of storage battery apparatuses  110 , a request charge and discharge amount which is a charge amount or discharge amount corresponding to a charge and discharge request, based on the charge and discharge request received from the EMS  120 . Herewith, it is possible to suppress deterioration of each of the storage battery apparatuses  110  by utilizing an optimum storage battery apparatus  110  with each other, in the whole of the power community. 
     And, the control server  200  transmits, to the EMS  120  corresponding to the storage battery apparatus  110 , a control message (charge and discharge instruction) indicating control to the storage battery apparatus  110  to which the request charge and discharge is allocated. Here, the control server  200  may transmit a flow control message requesting control of the flow (for example, DR; Demand Response), or a backward flow control message requesting control of the backward flow. Control degree of the flow or the backward flow may be represented by an absolute value (for example, ◯◯kW), or a relative value (for example, ◯◯%). The EMS  120  controls the storage battery apparatus  110  according to the control message. 
     Communication between the control server  200  and EMS  120  can use a protocol conforming to the Open ADR (Automated Demand Response) or an original dedicated protocol. 
     (Configuration of Control Server) 
       FIG. 2  is a diagram illustrating a configuration of the control server  200  according to the present embodiment. As illustrated in  FIG. 2 , the control server  200  includes a database  210 , communicator  220 , and controller  230 . 
     The database  210  is configured by a storage medium such as a memory or/and HDD (Hard Disk Drive), or the like, and stores information and data used for control and process of the controller  230 . The database  210  stores data regarding to each of the storage battery apparatuses  110 .  FIG. 3  is a diagram illustrating an example of the data regarding to each of the storage battery apparatuses  110  stored in the database  210 . As illustrated in  FIG. 3 , the data regarding to each of the storage battery apparatuses  110  includes ID of the storage battery apparatus, charge rate (SOC: State of Charge) of the storage battery apparatus  110 , temperature of the storage battery apparatus  110 , deterioration degree (SOH: State of Health) of the storage battery apparatus  110 , real power storage amount of the storage battery apparatus  110 , and virtual power storage amount of the storage battery apparatus  110 . Here, the real power storage amount is a real power storage amount of a result that the storage battery apparatus  110  is utilized with each other. On the other hand, the virtual power storage amount is a virtual power storage amount in a case of assuming that the storage battery apparatus  110  is not utilized with each other. The data regarding to each of the storage battery apparatuses  110  may include a number of charge and discharge cycles of the storage battery apparatus  110 , furthermore. 
     The communicator  220  is configured by a communication module, and performs communication with the EMS  120 . The communicator  220  includes a receiver  221  and transmitter  222 . 
     The receiver  221  receives a message including information indicating usage of the storage battery apparatus  110  from the EMS  120 . The receiver  221  may receive the message from the EMS  120  periodically. The information indicating the usage of the storage battery apparatus  110  includes a charge rate (SOC: State of Charge) of the storage battery apparatus  110 , temperature of the storage battery apparatus  110 , deterioration degree (SOH: State of Health) of the storage battery apparatus  110 , at least one information of a real power storage amount of the storage battery apparatus  110  and virtual power storage amount of the storage battery apparatus  110 , or information for specifying the information. [ 0028 ] 
     Further, the receiver  221  receives, from the EMS  120 , a charge and discharge request which is a request of charge or discharge of the storage battery apparatus  110   FIG. 4  is a diagram illustrating an example of the charge and discharge request message. As illustrated in  FIG. 4 , the charge and discharge request message includes an information element indicating a time (control time) executing charge or discharge to a target storage battery apparatus, information element indicating control content whether the charge or discharge is requested, and information element indicating a request charge and discharge amount (control amount) [kWh]. The control time includes start time and end time. The control time may be a time zone at every 30 minutes. The control content is charge or discharge as a control content within the control time. The control amount is a charge amount or discharge amount. 
     The receiver  221  may receive a message from the EMS  120  via a data collection server or the message from the EMS  120  not via the data collection server. 
     The transmitter  222  transmits, to the EMS  120  corresponding to the storage battery apparatus  110 , a control message (charge and discharge instruction) instructing control to the storage battery apparatus  110  to which the request charge and discharge amount is allocated. 
     The controller  230  is configured by a CPU (Central Processing Unit) or the like, and controls each of configurations included in the control server  200 . The controller  230  includes a manager  231 , offsetter  232 , selector  233 , allocator  234 , and calculator  235 . The manager  231 , offsetter  232 , selector  233 , allocator  234 , and calculator  235  may be configured by one CPU or configured by a plurality of CPUs. 
     The manager  231  manages the data regarding to each of the storage battery apparatuses  110  (referring to  FIG. 3 ). Concretely, when the receiver  221  receives the message including the information indicating the usage of the storage battery apparatus  110 , the manager  231  controls the database  210  so as to update the data regarding to the storage battery apparatus  110  based on the information. 
     When the receiver  221  receives both of the request of charge and request of discharge to two or more the target storage battery apparatuses, the offsetter  232  offsets a charge amount corresponding to the request of charge and discharge amount corresponding to the request of discharge. The offsetter  232  may perform the offset, only when the receiver  221  receives the both of the request of charge and request of discharge regarding to a same timing (time zone). For example, when, at a certain time zone, charge of 10 kWh to the storage battery apparatus  110 A of the facility  100 A is requested, charge of 3 kWh to the storage battery apparatus  110 B of the facility  100 B is requested, and charge of 4 kWh to the storage battery apparatus  110 C of the facility  100 C is requested, charge of 3 kWh (10 kWh−3 kWh−4 kWh=3 kWh) is requested to the storage battery apparatuses A to C, by offset. As a result, a charge amount 3 kWh remaining without being offset by the offsetter  232  becomes the request charge and discharge amount. It is possible to suppress deterioration of each of the storage battery apparatuses  110  since an amount or a number of charge and discharge of the storage battery apparatus  110  can be reduced by the offset. 
     The selector  233  selects at least one storage battery apparatus  110  that causes to execute charge or discharge according to the charge and discharge request message received by the receiver  221  based on a parameter relating to deterioration of each of the storage battery apparatuses  110  (hereinafter, referred to as “deterioration related parameter”). 
     The deterioration related parameter may include a charge rate (SOC) of each of the storage battery apparatuses  110 . The selector  233  may select at least one storage battery apparatus  110  that causes to execute charge and discharge so that the SOC of each of the storage battery apparatuses  110  brings to a target SOC. For example, the selector  233  performs selection so that the SOC of each of the storage battery apparatuses  110  brings closer to around 50%. When the selector  233  selects the storage battery apparatus  110  that causes to execute charge, the selector  233  may select the storage battery apparatus  110  that the SOC is closer to empty (for example, equal to or less than 10%). When the selector  233  selects the storage battery apparatus  110  that causes to execute discharge, the selector  233  may select the storage battery apparatus  110  that the SOC is closer to full charge (for example, equal to or more than 90%). Or, the selector  233  may select the storage battery apparatus  110  that the SOC is closest to the target SOC (for example, close to around 50%) preferentially. By performing selection that takes such the SOC into consideration, it is possible to suppress deterioration of the each of the storage battery apparatuses  110 . 
     The deterioration related parameter may include temperature of each of the storage battery apparatuses  110 . Here, the temperature may be temperature of inside of the storage battery apparatus  110  (for example, storage battery cell) or temperature around of the storage battery apparatus  110 . The selector  233  may select at least one storage battery apparatus  110  out of the storage battery apparatus  110  that the temperature is equal to or more than a first threshold value and/or the storage battery apparatus  110  other than the storage battery apparatus  110  that the temperature is equal to or less than a second threshold value, out of the plurality of storage battery apparatuses  110 . The first and second threshold values are predetermined according to characteristic of the storage battery apparatus  110 . By performing selection that takes such the temperature into consideration, it is possible to suppress deterioration of each of the storage battery apparatuses  110 . 
     The deterioration related parameter may include a number of charge and discharge cycles or deterioration degree (SOH) of each of the storage battery apparatuses  110 . The selector  233  selects the storage battery apparatus  110  that is the smallest number of charge and discharge cycles or the storage battery apparatus  110  that is the least deterioration degree (SOH), preferentially. By performing selection that takes such the number of charge and discharge cycles or the SOH into consideration, it is possible to suppress deterioration of each of the storage battery apparatuses  110  and reduce that life of specific the storage battery apparatus  110  expired early. 
     The selector  233  may perform selection of the storage battery apparatus  110  by combining a plurality of the deterioration related parameters. For example, the selector  233  may select the storage battery apparatus  110  that the SOC is close to the target SOC (for example, around 50%) and the deterioration degree (SOH) is small, out of the storage battery apparatus  110  that the temperature is equal to or more than the first threshold value and/or the storage battery apparatus  110  other than the storage battery apparatus  110  that the temperature is equal to or less than the second threshold value. 
     The allocator  234  allocates at least a part of the request charge and discharge amount to the storage battery apparatus  110  other than the target storage battery apparatus out of the plurality of storage battery apparatuses  110 , so as to suppress deterioration of the target storage battery apparatus to which charge or discharge is requested. Concretely, the allocator  234  allocates the request charge and discharge amount to the storage battery apparatus  110  selected by the selector  233 . 
     Or, the allocator  234  may perform charge and discharge allocation by distributing the charge amount or discharge amount to all storage battery apparatuses  110  equally. In this case, the allocator  234  may allocate the charge amount or discharge amount multiplied by a capability ratio (capacity ratio, output ratio, or power storage amount ratio) of each of the storage battery apparatuses  110 . 
     When the offsetter  232  performs offset, the allocator  234  performs the charge and discharge allocation to the charge amount or discharge amount remaining without being offset by the offsetter  232  as a request charge and discharge amount after offset. However, when the charge and discharge amount is zero by the offset, the allocator  234  does not perform the charge and discharge allocation since the request charge and discharge amount becomes zero, too. As a result, any of the storage battery apparatus  110  does not perform charge and discharge. 
     The allocator  234  generates a control message (charge and discharge instruction) addressed to the EMS  120  corresponding to the storage battery apparatus  110  to which the request charge and discharge amount is allocated by the charge and discharge allocation. The transmitter  222  transmits the control message (charge and discharge instruction) generated by the allocator  234  to the EMS  120 . 
     The calculator  235  calculates a virtual power storage amount of the target storage battery apparatus, when the allocator  234  allocates at least the part of the request charge and discharge amount to the storage battery apparatus  110  other than the target storage battery apparatus. For example, when a charge amount or discharge amount is allocated to the storage battery apparatus  110 B of the facility  100 B to the charge and discharge request of the storage battery apparatus  110 A of the facility  100 A, though a power storage amount of the storage battery apparatus  110 B of the facility  100 B increases or decreases practically, the calculator  235  assumes that the power storage amount of the storage battery apparatus  110 A of the facility  100 A increases or decreases virtually and calculates the virtual power storage amount of the storage battery apparatus  110 A. That is, when the allocator  234  allocates at least the part of the request charge and discharge amount to the storage battery apparatus  110  other than the target storage battery apparatus (that is, when the storage battery apparatus  110  is utilized with each other), the calculator  235  calculates the virtual power storage amount reflecting entire of the request charge and discharge amount corresponding to the charge and discharge request of the storage battery apparatus  110 A. The calculated virtual power storage amount is stored in the database  210 , and is used for calculation of an electricity charge of the consumer&#39;s facility corresponding to the facility  100 A. 
     (Operation Example of Control System) 
       FIG. 5  is a diagram illustrating a first example of an operation sequence in the control system  1  according to the present embodiment. In the first example, a control plan in the facility  100  (EMS  120 ), charge and discharge allocation in the control server  200 , and charge and discharge control are repeated at a predetermined time period. 
     As illustrated in  FIG. 5 , in Step S 101 , the EMS  120  of each of the facilities  100  creates a charge and discharge control plan of the storage battery apparatus  110  of the own facility  100 , and generates the charge and discharge request message (referring to  FIG. 4 ) according to the created charge and discharge control plan. 
     In Step S 102 , the EMS  120  of each of the facilities  100  transmits the generated charge and discharge request message to the control server  200 . 
     In Step S 103 , the control server  200  performs the charge and discharge allocation so as to utilize the optimum storage battery apparatus  110  with each other based on the charge and discharge request message received from the EMS  120  of each of the facilities  100 . 
     In Step S 104 , the control server  200  transmits a control message (charge and discharge instruction) based on a result of the charge and discharge allocation. In  FIG. 5 , an example that the control server  200  transmits the charge and discharge instruction to the EMS  120  of each of the facilities  100  is exemplified. The charge and discharge instruction includes information indicating charge and discharge or a discharge amount allocated by the charge and discharge allocation. The charge and discharge instruction may include information indicating a virtual power storage amount reflecting the result of charge and discharge allocation. 
     Processes of Step S 101  to Step S 104  are repeated at a predetermined time period. 
       FIG. 6  is a diagram illustrating a second example of an operation sequence in the control system  1  according to the present embodiment. In the second example, a charge and discharge request occurs in an arbitrary timing. 
     As illustrated in  FIG. 6 , in Step  201 , the EMS  120 B of the facility  100 B determines to perform charge or discharge of the storage battery apparatus  110 B of the facility  100 B, and notifies it&#39;s content as a charge and discharge request message to the control server  200 . 
     In Step S 202 , the control server  200  performs charge and discharge allocation so as to utilize the optimum storage battery apparatus  110  with each other. Here, it will be described on the assumption that the control server  200  determines that the storage battery apparatus  110 A of the facility  100 A is optimal. 
     In Step S 203 , the control server  200  performs charge and discharge instruction to the EMS  120  of the facility  100 A. 
     In Step S 204 , the control server  200  notifies, to the EMS  120 B of the facility  100 B, a virtual power storage amount of the storage battery apparatus  110 B of the facility  100 B to which a result of the charge and discharge allocation is reflected. 
       FIG. 7  is a diagram illustrating an example of a charge and discharge allocation flow (Step S 103  of  FIG. 5 , Step S 202  of  FIG. 6 ) in the control system  1  according to the present embodiment. 
     As illustrated in  FIG. 7 , in Step S 11 , the receiver  221  of the control server  200  receives the charge and discharge request message from one or a plurality of the EMSs  120 . 
     In Step S 12 , the offsetter  232  of the control server  200  determines whether or not there are both of a charge request and discharge request to two or more target storage battery apparatuses at a same timing (time zone) based on a receiving content of the receiver  221 . In a case of “NO” in Step S 12 , the process proceeds to Step S  15 . 
     In a case of “YES” in step S 12 , in Step S 13 , the offsetter  232  of the control server  200  offsets a charge amount corresponding to the charge request and discharge amount corresponding to the discharge request. In a case that there is a charge amount or discharge amount which could not be offset (Step S 14 : YES), that is, when a requested total charge amount and requested total discharge amount do not match, the process proceeds to Step S 15 . On the other hand, when the charge amount and discharge amount are all offset (Step S 14 : NO), that is, the requested total charge amount and requested total discharge amount matches, the present flow processes. 
     In Step S 15 , the selector  233  of the control server  200  selects at least one storage battery apparatus  110  that causes to execute charge or discharge, based on a deterioration related parameter of each of the storage battery apparatuses  110 . 
     In Step S 16 , the allocator  234  of the control server  200  allocates a request charge and discharge amount to the storage battery apparatus  110  selected by the selector  233 . 
     In Step S 17 , the allocator  234  of the control server  200  generates a control message (charge and discharge instruction) addressed to the EMS  120  corresponding to the storage battery apparatus  110  to which the request charge and discharge amount is allocated. The transmitter  222  of the control server  200  transmits the generated control message (charge and discharge instruction) to the EMS  120 . 
     (Summaries of Embodiments) 
     According to the present embodiment, the control server  200  that controls the charge and discharge amount of the plurality of storage battery apparatuses  110  belonging to different consumer&#39;s facilities includes the receiver  221  configured to receive the request of charge or discharge to the target storage battery apparatus included in the plurality of storage battery apparatuses  110 , and the allocator  234  configured to allocate, to the storage battery apparatus  110  other than the target storage battery apparatus out of the plurality of storage battery apparatuses  110 , at least the part of the request charge and discharge amount that is the charge amount or discharge amount corresponding to the request received by the receiver  221 , so as to suppress deterioration of the target storage battery apparatus. Herewith, it is possible to control integrally the charge and discharge of the plurality of storage battery apparatuses  110  and suppress deterioration of each of the storage battery apparatuses  110 . 
     (Modified Examples) 
     In the above embodiments, though charge and discharge speed is not be mentioned in particular, the control server  200  may perform the charge and discharge allocation in consideration of the charge and discharge speed. For example, when the charge and discharge speed which is speed of charge or discharge corresponding to the charge and discharge request message received by the receiver  221  is equal to or more than predetermined speed, the allocator  234  of the control server  200  may allocate the request charge and discharge amount to  2  or more the storage battery apparatus  110  that causes to execute charge or discharge separately, so as to reduce the charge and discharge speed. Here, the charge and discharge speed is determined by size of a control amount with respect to time length of control time. By causing to execute charge or discharge to 2 or more the storage battery apparatus  110  separately, since it is possible to reduce the charge and discharge speed of each of the storage battery apparatuses  110 , it is possible to suppress deterioration of each of the storage battery apparatuses  110 . 
     (Other Embodiments) 
     In the above embodiments, though it is exemplified about the example of performing centralized control by the control server  200 , it may be configured to perform distributed control by the EMS  120 . In this case, each of the EMSs  120  transmits the charge and discharge request message to the other EMS  120 , and each of the EMSs  120  performs the charge and discharge allocation based on the charge and discharge request message. In the configuration of performing the distributed control, a control apparatus that controls charge and discharge of a storage battery apparatus may be the EMS  120 . 
     In the above embodiments, though it is not be mentioned about VPP (Virtual Power Plant) control in particular, the VPP control may be performed in a preliminary stage of the operation according to the above embodiments. For example, a VPP server transmits a message requesting charge and discharge of the storage battery apparatus  110  to the EMS  120 , and the EMS  120  transmits the charge and discharge request message to the control server  200  based on the message received from the VPP server. Or, the VPP server may transmit the charge and discharge request message to the control server  200  not via the EMS  120 . 
     Further, in a case that the VPP control is performed, the operation according to the above embodiments may be applied in every facility group of a VPP control target. Mutual utilization of the storage battery apparatuses  110  only within the facility  100  belonging to the facility group of the VPP control target may be approved. Further, in the case that the VPP control is performed, capacity for the VPP control may be secured in each of the storage battery apparatuses  110 . 
     In the above embodiment, though the control server  200  includes the database  210 , it is not limited to this. The database  210  may be a cloud server installed on an internet. 
     Though it is not be mentioned in the above embodiments in particular, the EMS  120  does not necessarily have to be provided within the facility  100 . For example, a part of functions of the EMS  120  may be provided by the cloud server installed on the internet. That is, it may be considered that the EMS  120  includes the cloud server. Further, the EMS  120  may be substituted by a configuration of a part within the storage battery apparatus  110 . 
     Though it is not be mentioned in the above embodiments in particular, the storage battery apparatus  110  does not necessarily have to be provided within the facility  100 . The storage battery apparatus  110  may be provided outside of the facility  100 . 
     Though it is described with reference to the drawings about the embodiments in details, concrete configuration is not limited to the above, and various design changes or the like are possible without deviating from the gist of the invention. 
     This application claims priority to Japanese application publication No. 2018-148226 (filed on Aug. 7, 2018), which is incorporated by reference herein in their entity.