KR20220134160A - System for Cloud-based EMS-ESS linkage management - Google Patents

Abstract

A system for interlocking and managing a power system management system (EMS) and an energy storage system (ESS) based on a cloud is provided. An MS-ESS interworking management system according to an embodiment of the present invention includes: an ESS including a power converter (PCS) that boosts or steps down DC, a battery management system (BMS) that controls a battery that stores converted DC, and a power management system (PMS) that controls the PCS and the BMS; an LVDC transmission and distribution unit that connects the ESS and customers with renewable energy generation facilities installed, and is connected to customers and direct current distribution (LVDC) transmission/distribution systems; an EMS for processing data received from the ESS and the LVDC transmission and distribution units; and a cloud server that supports interworking services between the ESS and the EMS and allocates resources necessary for storing data obtained through the EMS or processing data. In this case, the cloud server may allow an operating system for operating the EMS to be distributed and a patch file of the periodically distributed operating system to be distributed so that the operating system can be upgraded. As a result, it is possible to build an LVDC distribution system of the DC power system and efficiently manage the same by utilizing the ESS and the customer who has installed power generation facilities such as renewable energy solar power.

Description

Cloud-based EMS-ESS linkage management system

The present invention relates to an EMS-ESS interworking management system, and more particularly, to a system for managing an EMS (Power System Operating System) and an ESS (Energy Storage System) by interworking based on a cloud.

In recent years, as the demand for energy has rapidly increased, the power shortage has been exacerbated. In order to solve this power shortage, as power generation and transmission and distribution facilities are additionally installed, social costs are rapidly increasing, and the expansion of power supply is also delayed. Accordingly, the government is also shifting its energy policy from supply-oriented to demand-management-oriented in the past.

Power demand management is a method of stably meeting power demand while minimizing costs by changing consumers' power usage patterns. Electricity demand management can be divided into demand response and energy efficiency improvement. When such power demand management is applied to buildings, homes, and factories, the effect can be significant.

Recently, as various smart grid technologies such as new and renewable energy such as solar power, LED lighting, ESS (Enery Storage System), electric vehicles, and smart meters have been introduced into buildings, BEMS controls the power consumption of buildings through their integrated operation. As the market demand for (Building Energy Management System), HEMS (Home Energy Management System), and FEMS (Factory Management System) technologies is increasing, a user-centered energy management system that uses energy is established and members of the organization who use energy It is required to find a way to achieve many effects at a low cost with the participation of the entire group.

The present invention has been devised to solve the above problems, and an object of the present invention is to build an LVDC distribution system of a DC power system by using a consumer who has installed a power generation facility such as a renewable energy solar power and an ESS, and It is to provide a system that interlocks EMS (Power System Operating System) and ESS (Energy Storage System) and manages them based on the cloud.

In addition, another object of the present invention is to distribute and manage the operating system for the operation of the EMS, but when distributing the operating system, the services supported by the operating system are provided according to the essential parts and the execution environment regardless of the execution environment of the EMS. By selectively dividing and distributing necessary parts, it is intended to provide a system that can lighten the distributed data.

According to an embodiment of the present invention for achieving the above object, the EMS-ESS interworking management system is a PCS (power conversion device) that boosts or steps down DC, and BMS (battery management) that controls a battery that stores the converted DC system) and ESS (energy storage system) including PMS (power management system) for controlling PCS and BMS; an LVDC transmission/distribution unit that connects the ESS and consumers with renewable energy generation facilities, and connects the consumers with the LVDC (direct current distribution) transmission/distribution system; EMS (Power System Operating System) that processes data received from ESS and LVDC transmission and distribution units; and a cloud server that supports the interworking service between the ESS and the EMS and stores data acquired through the EMS or allocates resources necessary for data processing; in this case, the cloud server is an operating system for operating the EMS is deployed and, by periodically distributing the patch file of the distributed operating system, it is possible to perform the operating system upgrade.

In addition, when distributing an operating system for EMS operation, the cloud server provides services supported by the operating system in order to lighten the data to be distributed, regardless of the EMS execution environment, and selectively required depending on the essential parts and execution environment. It can be distributed in parts.

And among the services supported by the operating system, the essential services that are essential regardless of the execution environment of the EMS are services that support at least one of the power peak management function, the protective charging function, the power saving mode function, and the power usage prediction and optimization function. can

In addition, among the services supported by the operating system, the optional services that are selectively required according to the execution environment of EMS are data validation function, user UI/UX enhancement function, energy consumption pattern analysis function, peak cut function, load shift function, demand It may be a service supporting at least one of the response functions.

In addition, the cloud server allocates the requested resource when processing the data received by the EMS or requests resource allocation to support the service supported by the operating system, but with the execution environment of the EMS among the services supported by the operating system. Regardless, the resources required to support essential essential services can be allocated preferentially.

In addition, when the current status information of consumers who have installed the ESS and power generation facilities is collected, the EMS allocates and allocates the target power production to be produced by the consumers who have installed each power generation facility using the resources allocated through the cloud server. Calculate the operation schedule of the power generation facilities installed in each customer according to the target power production, and data on the power generation facility operated according to the operation schedule, data on the current generation amount, and the current charge amount of the ESS, the current month charge amount, the current discharge amount, When data on the amount of discharge for the current month is collected, the charge/discharge state of the ESS and the target amount of each allocated power may be adjusted by comparing the collected information with each allocated power production.

And according to an embodiment of the present invention, the EMS-ESS interworking management system, an edge-gateway provided for data transmission/reception between the ESS and the EMS; further comprises, in this case, the cloud server, the communication state between the ESS and the EMS To check, the EMS can periodically receive data on the voltage, current, and temperature values generated within the ESS through the edge-gateway.

In addition, the cloud server may periodically receive the log file of the edge-gateway to verify whether the EMS normally receives data on voltage, current, and temperature values.

In addition, the cloud server collects data on today's generation or this month's generation among consumers who have installed power generation facilities to which the target power production is allocated, and the target achievement rate of today's or this month's generation compared to the target power production is less than or equal to a preset threshold ratio, The allocated target power production may be reallocated so that the target achievement rate of the consumer who has installed the corresponding power generation facility is greater than or equal to the threshold ratio.

In addition, the cloud server reassigns the shortfall in the target power production generated due to the reallocation of the target power production of a specific consumer who has installed the power generation facility to the consumers whose target achievement rate is greater than or equal to a critical ratio, but the shortfall in the target power production is Customers with the highest achievement rate can be reassigned first.

As described above, according to the embodiments of the present invention, customers who installed power generation facilities such as renewable energy solar power by interworking and managing EMS (Power System Operating System) and ESS (Energy Storage System) based on the cloud and ESS can be used to build an LVDC distribution system for a DC power system and efficiently manage it.

In addition, according to an embodiment of the present invention, an operating system for the operation of the EMS is distributed and managed, but when the operating system is distributed, the services supported by the operating system are provided to essential parts and the execution environment regardless of the execution environment of the EMS. By selectively dividing and distributing the necessary parts, the distributed data can be made lighter.

1 is a view provided for the description of an EMS-ESS interworking management system according to an embodiment of the present invention;
2 is a view provided for the description of an ESS according to an embodiment of the present invention;
3 is a view provided for the description of a cloud server according to an embodiment of the present invention;
4 is a diagram provided for explanation of a process of distributing an operating system according to an embodiment of the present invention;
5 is a view provided for the description of the EMS-ESS interworking management method according to an embodiment of the present invention, and
6 is a diagram provided for explanation of an edge-gateway according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms.

1 is a diagram provided to explain an EMS-ESS interworking management system according to an embodiment of the present invention.

The EMS-ESS interlocking management system according to this embodiment builds the LVDC distribution system of the DC power system by using the consumer 10 and the ESS 100 installed with power generation facilities such as renewable energy solar power and efficiently manages it. prepared to do

In addition, this EMS-ESS interworking management system distributes and manages an operating system for the operation of the EMS 300 , but when distributing the operating system, the services supported by the operating system are essential regardless of the execution environment of the EMS 300 . It is possible to reduce the weight of distributed data by selectively dividing and distributing the necessary parts according to the necessary parts and the execution environment.

To this end, the EMS-ESS interworking management system may include the ESS 100 , the LVDC power transmission/distribution unit 200 , the EMS 300 , the cloud server 400 , and the edge-gateway 500 .

The ESS 100, as an energy storage device, can store energy and supply the stored energy when necessary.

The LVDC transmission/distribution unit 200 connects the ESS 100 and the consumer 10 installed with the renewable energy generation facility, and may be connected to the consumer 10 and the LVDC (direct current distribution) transmission/distribution system.

Here, the consumer 10 is an office, house, apartment, building, factory, etc., and means a consumer who can cover a part of power consumption by installing a rooftop renewable energy power generation facility and sell a part, as well as an energy prosumer.

The EMS 300 is provided to process data received from the ESS 100 and the LVDC transmission/distribution unit 200 .

For example, the EMS 300 installs each power generation facility by using the resource allocated through the cloud server 400 when the status information of the customer 10 who has installed the ESS 100 and the power generation facility is collected. Allocate the target power production to be produced in one consumer 10, calculate the operation schedule of the power generation facility installed in each consumer 10 according to the allocated target power production, and calculate the operation schedule of the power generation facility operated according to the operation schedule. When data on power generation, current month's power generation, and data on today's charge, this month's charge, today's discharge, and current month's discharge amount of the ESS 100 are collected, each allocated power output and the collected information are compared, and the ESS 100 ) of the charging/discharging state and the allocated target power output for each may be adjusted.

Here, in the EMS 300 , one or more EMS 300 may be operated in different execution environments, and each EMS 300 provides information about its own execution environment to the cloud server 400 . .

In addition, each EMS 300 is mounted on the cloud server 400 or is implemented as a separate information processing device provided with a separate communication means and storage medium for connecting to the cloud server 400 , the cloud server 400 may be connected.

The cloud server 400 supports an interworking service between the ESS 100 and the EMS 300 , and may store data acquired through the EMS 300 or allocate resources necessary for data processing.

For example, the cloud server 400 may distribute an operating system for the operation of the EMS 300 and periodically distribute a patch file of the distributed operating system, so that the operating system is upgraded. .

The edge-gateway 500 may be provided for data transmission/reception between the ESS 100 and the EMS 300 .

2 is a view provided for the description of the ESS 100 according to an embodiment of the present invention.

Referring to FIG. 2 , the present ESS 100 controls a PCS 110 that boosts or steps down DC, a BMS 120 that controls a battery that stores the converted DC, and controls the PCS 110 and BMS 120 . It may include a PMS 130 that does.

The PCS 110 may boost or step-down the DC power stored in the battery to DC to supply power to the power system, or boost or step-down DC power supplied from the power system to DC to control storage in the battery.

In addition, the PCS 110 may convert DC power stored in the battery into AC to supply power to the power system, or convert AC power supplied from the power system into DC to control storage in the battery.

3 is a diagram provided to explain the cloud server 400 according to an embodiment of the present invention.

Referring to FIG. 3 , the cloud server 400 may include a first communication unit 410 , a first processor 420 , and a first storage unit 430 .

The first communication unit 410 is a communication means used to transmit and receive data necessary for the operation of the first processor 420 .

The first storage unit 430 is a storage medium for storing programs and data necessary for the operation of the first processor 420 .

The first processor 420 may support an interworking service between the ESS 100 and the EMS 300 , and may store data acquired through the EMS 300 or allocate resources necessary for data processing.

For example, the first processor 420 may distribute the operating system for the operation of the EMS 300 and periodically distribute the patch file of the distributed operating system, so that the operating system is upgraded. have.

Specifically, the first processor 420 provides services supported by the operating system, regardless of the execution environment of the EMS 300 , in order to lighten the distributed data when distributing the operating system for the operation of the EMS 300 . to selectively divide and distribute the necessary parts according to the necessary parts and the execution environment.

Here, among the services supported by the operating system, essential services essential regardless of the execution environment of the EMS 300 include at least one of a power peak management function, a protective charging function, a power saving mode function, and a power usage prediction and optimization function. It may be a supported service.

And among the services supported by the operating system, the optional services that are selectively necessary according to the execution environment of the EMS 300 are data validation function, user UI/UX advancement function, energy consumption pattern analysis function, Peak Cut function, Load shift function , it may be a service supporting at least one of the Demand Response functions.

In addition, the first processor 420, the EMS 300 by allocating the requested resource when the EMS 300 processes the received data or requests resource allocation necessary to support the service supported by the operating system, so that the EMS 300 is , when the current status information of the consumer 10 who has installed the ESS 100 and the power generation facility is collected, the target power production to be produced by the consumer 10 who has installed each power generation facility is allocated, and according to the allocated target power production The operation schedule of the power generation facility installed in each consumer 10 is calculated, and the current generation amount of the power generation facility operated according to the operation schedule, data on the current month generation amount, and the current day's charge amount, this month's charge amount, and today's discharge amount of the ESS 100 , when data on the amount of discharge for this month is collected, the charge/discharge state of the ESS 100 and the target amount of each allocated power may be adjusted by comparing the collected information with each allocated power production.

In this case, the first processor 420 allocates the requested resource when the EMS 300 processes the received data or requests resource allocation necessary to support the service supported by the operating system, but the operating system supports Among the services, regardless of the execution environment of the EMS 300 , resources necessary to support essential essential services may be preferentially allocated.

And the first processor 420, through the EMS 300 to which the resource is allocated, collects data on the current generation amount or the current month generation amount among consumers 10 who have installed the power generation facility to which the target power production is allocated, When the target achievement rate of today's or this month's power generation relative to power production is less than or equal to a preset threshold ratio, the allocated target power production can be reallocated so that the target achievement rate of the consumer 10 who has installed the corresponding power generation facility is greater than or equal to the threshold ratio. .

In addition, the first processor 420, through the EMS 300 to which the resource is allocated, the target achievement rate for the shortfall in the target power production generated due to the reallocation of the target power production of the specific consumer 10 who has installed the power generation facility It may be reassigned to the consumers 10 that are above this threshold ratio, but the shortfall in the target power production may be preferentially reassigned from the consumers 10 having the highest target achievement rate.

For another example, the first processor 420, in order to check the communication state between the ESS 100 and the EMS 300, the EMS 300 through the edge-gateway 500 periodically in the ESS 100 It is possible to receive data about the voltage, current, and temperature values generated in the .

Specifically, the first processor 420 may periodically receive the log file of the edge-gateway 500 to verify whether the EMS 300 normally receives data on voltage, current, and temperature values.

4 is a diagram provided to explain a process of distributing an operating system according to an embodiment of the present invention.

The distribution process of the operating system according to the present embodiment may be executed by the cloud server 400 .

Referring to FIG. 4 , the cloud server 400 provides services supported by the operating system when distributing an operating system for operation to one or more EMS 300 , regardless of the execution environment of each EMS 300 . Depending on the core service and the execution environment, which are parts, a necessary optional service may be selectively classified (S410).

When the core service and the optional service are classified, the cloud server 400 distributes the operating system including the services classified as the core service to each EMS 300 (S420), and the operating system including the core services is distributed Data on the execution environment (execution environment information) is collected from each of the EMSs 300 ( S430 ).

The cloud server 400 that has collected data on the execution environment from each EMS 300 selects the selectable services that can be operated from among the selected services required according to each execution environment (S440-Y), and each EMS It can be selectively distributed to (300) (S450).

At this time, the data on the execution environment is information (installation point, number of installations, each capacity, total capacity, etc.) about the ESS 100 managed by each EMS 300 and the customer 10 who installed the power generation facility. and hardware information (memory information, storage information, CPU information, etc.) of the EMS 300 may be included.

And, when the upgrade cycle of the operating system arrives, the cloud server 400 may distribute the distributed operating system patch file ( S460 ), so that the operating system upgrade is performed periodically.

Through this, the operating system for the operation of the EMS 300 is distributed and managed, but when the operating system is distributed, the services supported by the operating system are provided according to the essential parts and the execution environment regardless of the execution environment of the EMS 300 . By selectively dividing and distributing the necessary parts, the distributed data can be made lighter.

5 is a diagram provided to explain an EMS-ESS interworking management method according to an embodiment of the present invention.

The EMS-ESS interworking management method according to the present embodiment may be executed by the EMS-ESS interworking management system described above with reference to FIGS. 1 to 3 .

Referring to FIG. 5 , the cloud server 400 collects the current status information of the consumers 10 who have installed the ESS 100 and the power generation facilities through the EMS 300 to which the resources are allocated (S510), each power generation Allocate the target power production to be produced by the consumers 10 in which the facilities are installed (S520), and according to the allocated target power production, it is possible to calculate the operation schedule of the power generation facilities installed in each consumer 10 (S530) .

And when the power generation facilities are operated according to the calculated operation schedule (S540), the cloud server 400, through the resource-allocated EMS 300, the current generation amount of the power generation facility operated according to the operation schedule, the current generation amount Data and data on the current charge amount, the current month charge amount, the current day discharge amount, and the current month discharge amount of the ESS 100 are collected (S550), and based on the collected data, each allocated power production and the collected information are compared (S560), the charging/discharging state of the ESS 100 and the allocated target power production may be adjusted (S570).

For example, the cloud server 400 collects data on today's power generation or this month's power generation among consumers 10 who have installed power generation facilities to which the target power production is assigned, through the EMS 300 to which the resource is assigned. , when the target achievement rate of today's or this month's power generation relative to the target power production is less than or equal to a preset threshold ratio, the target power production allocated is reallocated so that the target achievement rate of the consumer 10 who has installed the power generation facility is greater than or equal to the critical ratio can

At this time, the cloud server 400, through the EMS 300 to which the resource is allocated, the target achievement rate for the shortfall in the target power production generated due to the reassignment of the target power production of the specific consumer 10 who has installed the power generation facility. It may be reassigned to the consumers 10 having a threshold ratio or higher, but the shortfall in the target power production may be preferentially reassigned from the consumers 10 having the highest target achievement rate.

Through this, the EMS 300 (power system operating system) and the ESS 100 (energy storage device) can be interlocked and managed based on the cloud.

6 is a diagram provided to explain the edge-gateway 500 according to an embodiment of the present invention.

Referring to FIG. 6 , the edge-gateway 500 may include a second communication unit 510 , a second processor 520 , and a second storage unit 530 .

The second communication unit 510 is a communication means used to transmit and receive data required for the second processor 520 to operate.

The second storage unit 530 is a storage medium for storing programs and data necessary for the operation of the second processor 520 .

The second processor 520 assigns an identification ID to each of the connected ESS 100 and EMS 300 , and data on voltage, current, and temperature values generated in the ESS 100 to which the EMS 300 is interlocked. When receiving, an identification ID may be added to the received data and transmitted to the EMS 300 .

Here, one EMS 300 may be linked with one or more ESS 100 , and the EMS 300 identifies data provided by each ESS 100 through the identification ID of the ESS 100 . can do.

In addition, the second processor 520 generates a log file while delivering the data provided by each ESS 100 to the EMS 300 , and when a preset period arrives, the log file is stored in the cloud server 400 . The edge-gateway 500 ID given from the is added and transmitted to the cloud server 400 .

Through this, the cloud server 400 may periodically check the communication status of the ESS 100 and the EMS 300 connected to each edge-gateway 500 .

In addition, when a specific edge-gateway 500 fails, the cloud server 400, through the log file received from the faulty edge-gateway 500, through the faulty edge-gateway 500 The connected ESS 100 and EMS 300 may be readjusted so that they are connected through another edge-gateway 500 that is replaced.

That is, the cloud server 400 gives the edge-gateway 500 ID of the faulty edge-gateway 500 to another edge-gateway 500 to be replaced, so that the ESS 100 and the EMS 300 are The continuity of the interworking service can be maintained.

On the other hand, it goes without saying that the technical idea of the present invention can also be applied to a computer-readable recording medium containing a computer program for performing the functions of the apparatus and method according to the present embodiment. In addition, the technical ideas according to various embodiments of the present invention may be implemented in the form of computer-readable codes recorded on a computer-readable recording medium. The computer-readable recording medium may be any data storage device readable by the computer and capable of storing data. For example, the computer-readable recording medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, or the like. In addition, the computer-readable code or program stored in the computer-readable recording medium may be transmitted through a network connected between computers.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the claims In addition, various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

10: acceptor
100: ESS (Energy Storage System)
110: PCS (Power Conversion System)
120: BMS (Battery Management System, Battery Management System)
130: PMS (Power Management System)
200: LVDC (Low-Voltage Direct Current) Transmission and Distribution
300: EMS (Energy Management System)
400: cloud server
410: first communication unit
420: first processor
430: first storage unit
500: edge-gateway
510: second communication unit
520: second processor
530: second storage unit

Claims (10)

ESS (Energy Storage System) including PCS (Power Conversion Device) for step-up or step-down of DC, BMS (Battery Management System) for controlling the battery that stores the converted DC, and PMS (Power Management System) for controlling PCS and BMS );
an LVDC transmission/distribution unit that connects the ESS and consumers with renewable energy generation facilities, and connects the consumers with the LVDC (direct current distribution) transmission/distribution system;
EMS (Power System Operating System) that processes data received from ESS and LVDC transmission and distribution units; and
A cloud server that supports interworking services between ESS and EMS and stores data acquired through EMS or allocates resources necessary for data processing; includes;
cloud server,
EMS-ESS interworking management system, characterized in that the operating system for the operation of the EMS is distributed, and the patch file of the distributed operating system is periodically distributed, so that the operating system is upgraded.
The method according to claim 1,
cloud server,
When distributing the operating system for EMS operation, in order to lighten the data to be distributed, it is important to distribute the services supported by the operating system by dividing the essential parts and selectively necessary parts according to the execution environment regardless of the execution environment of the EMS. EMS-ESS interlocking management system characterized by.
3. The method according to claim 2,
Among the services supported by the operating system, the essential services required regardless of the EMS execution environment are:
EMS-ESS interworking management system, characterized in that it is a service that supports at least one of a power peak management function, a protective charging function, a power saving mode function, and a power usage prediction and optimization function.
3. The method according to claim 2,
Among the services supported by the operating system, the optional services that are selectively required according to the execution environment of the EMS are,
EMS-ESS interworking management system, characterized in that it is a service that supports at least one of data validation function, user UI/UX advancement function, energy consumption pattern analysis function, peak cut function, load shift function, and demand response function.
3. The method according to claim 2,
cloud server,
When EMS requests to allocate resources necessary to process incoming data or support services supported by the operating system, allocate the requested resources;
Among the services supported by the operating system, the EMS-ESS interworking management system, characterized in that it preferentially allocates resources necessary to support essential essential services regardless of the EMS execution environment.
6. The method of claim 5,
EMS,
When the current status information of consumers who have installed ESS and power generation facilities is collected, using the resources allocated through the cloud server, allocate the target power production to be produced by the consumers who have installed each power generation facility, and Calculate the operation schedule of the power generation facilities installed in each customer according to the
When data on today's power generation and current month's power generation capacity of power generation facilities operated according to the operation schedule and data on today's charge amount, current month charge amount, today's discharge amount, and current month discharge amount of ESS are collected, each allocated power production and collected information EMS-ESS interworking management system, characterized in that by comparing the ESSs, the charging/discharging state of the ESS and the allocated target power production are adjusted.
7. The method of claim 6,
Edge-gateway provided for data transmission/reception between ESS and EMS; further comprising,
cloud server,
In order to check the communication status between the ESS and the EMS, the EMS-ESS interworking management system, characterized in that the EMS receives data on the voltage, current, and temperature values generated in the ESS periodically through the edge-gateway.
7. The method of claim 6,
cloud server,
An EMS-ESS interworking management system, characterized in that it periodically receives the log file of the edge-gateway and verifies that the EMS receives data on voltage, current, and temperature values normally.
7. The method of claim 6,
cloud server,
Among consumers who have installed power generation facilities to which target power production is allocated, data on current generation or current month generation is collected, and if the target achievement rate of today's or this month's generation compared to target power production is less than or equal to a preset critical ratio, the corresponding power generation facility is installed EMS-ESS interworking management system, characterized in that the allocated target power production is reallocated so that the target achievement rate of one customer is greater than or equal to a threshold ratio.
7. The method of claim 6,
cloud server,
The shortfall in target power production generated due to reallocation of target power production of a specific consumer who has installed power generation facilities should be reallocated to consumers whose target achievement rate is higher than or equal to the critical ratio, but the consumer with the highest target achievement rate EMS-ESS interworking management system, characterized in that it is reassigned first from

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