CN116799843A

CN116799843A - Charging and discharging method, device, electronic device and storage medium

Info

Publication number: CN116799843A
Application number: CN202311079828.6A
Authority: CN
Inventors: 李昊哲; 郭志强
Original assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd
Current assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2023-09-22
Anticipated expiration: 2043-08-25
Also published as: CN116799843B

Abstract

The application provides a charge and discharge method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: a plurality of slave EMSs are respectively arranged on the plurality of power distribution systems to respectively monitor and control the plurality of power distribution systems, and the plurality of slave EMSs can communicate with each other, so that barriers that the plurality of power distribution systems cannot communicate with each other are broken. When the plurality of slave EMSs determine the required charge amount or the required discharge amount respectively corresponding to the plurality of slave EMSs according to the charge amount or the discharge amount corresponding to the time period required to be charged or discharged from the master EMS and the preset communication paths among the plurality of slave EMSs, the operation burden of the master EMS is reduced.

Description

Charging and discharging method, device, electronic device and storage medium

Technical Field

The present application relates to the field of energy storage technologies, and in particular, to a charging and discharging method, a charging and discharging device, an electronic device, and a storage medium.

Background

Peak clipping and valley filling means that an energy management system (Energy Management System, EMS) releases electric energy by using an energy storage system in a peak period of a power grid so as to relieve the pressure of the power grid; the electric energy is stored during the off-peak period of the power grid, thereby storing the excess electric energy. At present, peak clipping and valley filling are all predicted by a remote EMS, and then the remote EMS decides which equipment is charged or discharged through, so that a great operation load is brought to the remote EMS.

Disclosure of Invention

The application provides a charge and discharge method and device, which are used for realizing communication among a plurality of energy storage systems by arranging a plurality of slave EMSs respectively corresponding to the plurality of energy storage systems, thereby determining the charge or discharge quantity respectively corresponding to the plurality of slave EMSs in a time period needing peak clipping or valley filling, and further reducing the operation load of a master EMS.

In a first aspect, the present application provides a charging and discharging method applied to a slave system in an energy storage system, the slave system including a plurality of slave energy management systems EMS, the plurality of slave EMS corresponding to a plurality of power distribution systems in the energy storage system, the method comprising:

determining target charge/discharge electric quantity corresponding to the plurality of slave EMSs respectively according to the charge/discharge electric quantity required by the first time period, the capacity of the power distribution system corresponding to the plurality of slave EMSs and a preset communication path; the preset communication paths are used for receiving information sent by other slave EMSs by the slave EMSs, and the charging/discharging electric quantity required by the first time period is received by the master EMS in the target slave EMS slave energy storage system;

and sending the target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs to the power distribution system corresponding to the plurality of slave EMSs so as to control the charge/discharge of the power distribution system corresponding to the plurality of slave EMSs.

According to the application, the plurality of slave EMSs are respectively arranged on the plurality of power distribution systems to respectively monitor and control the plurality of power distribution systems, and the plurality of slave EMSs can communicate with each other, so that the barrier that the plurality of power distribution systems cannot communicate with each other is broken. The plurality of slave EMSs are communicated mutually, and the target charging/discharging electric quantity corresponding to the plurality of slave EMSs is determined according to the charging/discharging electric quantity required by the first time period, so that the operation burden of the master EMS can be reduced.

In one possible example, the preset communication path includes a unidirectional circulation communication path, and determining target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS according to the charge/discharge electric quantities required for the first period of time, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and the preset communication path includes: a determining step, which comprises: the current target slave EMS determines the target charging/discharging electric quantity corresponding to the current target slave EMS according to the current charging/discharging electric quantity and the capacity of a power distribution system corresponding to the current target slave EMS; the target slave EMS sends the required auxiliary charge/discharge electric quantity to the next slave EMS according to a preset unidirectional circulation communication path, the next slave EMS is set as a new target slave EMS, at least the auxiliary charge/discharge electric quantity is set as a new charge/discharge electric quantity, and the new target slave EMS is designated to execute a determining step until the requirement is met; the meeting requirement includes that the sum of the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the charge/discharge electric quantity required by the first time period, or the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the capacity of the power distribution system corresponding to each of the plurality of slave EMSs.

In the present application, the charge/discharge power required for the first period is allocated to a plurality of slave EMS one by one according to the capacity of the power distribution system to which each slave EMS corresponds. Not only can the reasonable electric quantity distribution of a plurality of slave EMSs be realized, but also the burden of electric quantity distribution of the master EMS can be reduced.

In one possible example, before the determining step, the method further comprises: the target slave EMS determines first target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs according to the ratio between the charge/discharge electric quantity required by the first time period and the quantity of the plurality of slave EMSs; after setting a first target charge/discharge electric quantity corresponding to a target slave EMS in the plurality of slave EMSs as a new charge/discharge electric quantity, performing an operation of the determining step; setting at least the auxiliary charge/discharge capacity to a new charge/discharge capacity, comprising: the sum of the auxiliary charge/discharge power amount and the first target charge/discharge power amount corresponding to the new target slave EMS is set as the new charge/discharge power amount.

In the application, the charge/discharge electric quantity required by the first time period is distributed to a plurality of slave EMSs, and the slave EMS with smaller chargeable capacity can select to send the electric quantity exceeding the capacity of the power distribution system corresponding to the slave EMS to other slave EMSs in the plurality of slave EMSs, and the other slave EMSs distribute the electric quantity. Therefore, not only can the respective distribution of the plurality of slave EMSs to the corresponding charge/discharge electric quantity be ensured, but also the respective distribution of the plurality of slave EMSs to the corresponding power distribution system capacity can be ensured not to be exceeded, so that the charge/discharge efficiency of the plurality of power distribution systems in the whole energy storage system is improved.

In one possible example, the method further comprises: when the current charge/discharge electric quantity is not more than the capacity of the distribution system corresponding to the current target slave EMS, the auxiliary charge/discharge electric quantity required by the next slave EMS is sent to be zero; when the current charge/discharge electric quantity is larger than the capacity of the power distribution system corresponding to the current target slave EMS, the required auxiliary charge/discharge electric quantity is sent to the next slave EMS to be the difference between the current charge/discharge electric quantity and the capacity of the power distribution system corresponding to the current target slave EMS.

In one possible example, determining the target charge/discharge power amounts respectively corresponding to the plurality of slave EMS according to the charge/discharge power amounts required for the first period of time, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and the preset communication path includes: for each slave EMS, each slave EMS obtains the total capacity of a power distribution system corresponding to the plurality of slave EMSs through a preset communication path; if the ratio of the charge/discharge power required by the first time period to the total capacity of the power distribution systems corresponding to the plurality of slave EMS is greater than the preset ratio, each slave EMS determines the target charge/discharge power of each slave EMS according to the first ratio of the capacity of the power distribution system corresponding to each slave EMS to the total capacity of the plurality of power distribution systems and the charge/discharge power required by the first time period, wherein the higher the first ratio is, the higher the target charge/discharge power is.

In the present application, it is thus possible to secure a plurality of target charge/discharge electric quantities, which are allocated from the EMS to the corresponding capacities of the power distribution systems, thereby improving charge/discharge efficiency of the plurality of power distribution systems in the entire energy storage system.

In one possible example, the method further comprises: if the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the power distribution systems is not greater than a preset ratio, each slave EMS acquires the charge/discharge efficiency of the power distribution systems corresponding to the slave EMS through a preset communication path; the method comprises the steps that each slave EMS respectively determines target charging/discharging electric quantity of each slave EMS according to a second proportion of the chargeable/dischargeable quantity of each slave EMS in a first time period to the chargeable/dischargeable quantity of a plurality of slave EMSs in the first time period and the charging/dischargeable electric quantity required by the first time period, wherein the higher the second proportion is, the higher the target charging/discharging electric quantity is, the chargeable/dischargeable quantity of each slave EMS in the first time period is the product of the charging/discharging efficiency of each slave EMS and the target duration, the chargeable/dischargeable quantity of the plurality of slave EMSs in the first time period is the product of the charging/discharging efficiency of the plurality of slave EMSs and the target duration, and the target duration is the duration corresponding to the first time period.

In the present application, by determining the target charge/discharge power amount from the EMS in consideration of the charge/discharge efficiency from the EMS, the charge/discharge efficiency of the power distribution system in the entire energy storage system can be improved.

In one possible example, the preset communication path includes a unidirectional circulation communication path, and after the target charge/discharge electric quantity corresponding to each of the plurality of slave EMS is transmitted to the power distribution system corresponding to the plurality of slave EMS, so that the power distribution system corresponding to the plurality of slave EMS performs charge/discharge control, the method further includes: for each slave EMS, if the current slave EMS does not receive the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a second electric quantity to the second slave EMS, the second electric quantity is a difference value between the target charge/discharge electric quantity of the current slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS, the first electric quantity is a difference value between the required charge/discharge electric quantity of the first slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the first slave EMS, the first slave EMS is the last slave EMS of the current slave EMS determined according to a preset unidirectional circulation communication path, and the second slave EMS is the next slave EMS of the current slave EMS determined according to the preset unidirectional circulation communication path; if the current slave EMS receives the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a third electric quantity to the second slave EMS, wherein the third electric quantity is the difference value between the sum of the target charge/discharge electric quantity of the current slave EMS and the first electric quantity of the first slave EMS and the actual charge/discharge quantity of the current slave EMS; if the first electric quantity from the first slave EMS is currently received from the slave EMS, and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is not less than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends fourth electric quantity to the power distribution system corresponding to the current slave EMS so that the power distribution system corresponding to the current slave EMS performs charge/discharge control according to the fourth electric quantity, the fourth electric quantity is the difference value between the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period and the target charge/discharge electric quantity of the current slave EMS, and the fifth electric quantity is the difference value between the first electric quantity and the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period.

In the application, communication among a plurality of distribution systems is realized through communication among a plurality of slave EMSs, when the actual charge/discharge capacity of the distribution system is smaller than the corresponding charge/discharge capacity required by the distribution system due to the fault of the distribution system or other reasons, the unfinished charge or discharge capacity of the distribution system is supplemented by other distribution systems with more residual chargeable/dischargeable capacity, so that the charge or discharge workload of a plurality of distribution systems in the whole energy storage system is ensured.

In a second aspect, the present application provides a charging and discharging device applied to a slave system in an energy storage system, the slave system including a plurality of slave energy management systems EMS, the plurality of slave EMS corresponding to a plurality of power distribution systems in the energy storage system, the device including

A determining unit, configured to determine target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS according to charge/discharge electric quantities required in the first period, capacities of power distribution systems corresponding to the plurality of slave EMS, and a preset communication path; the preset communication paths are used for receiving information sent by other slave EMSs by the slave EMSs, and the charging/discharging electric quantity required by the first time period is received by the master EMS in the target slave EMS slave energy storage system;

And the transmitting unit is used for transmitting the target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs to the power distribution system corresponding to the plurality of slave EMSs so as to control the charge/discharge of the power distribution system corresponding to the plurality of slave EMSs.

In a third aspect, the present application provides an electronic device comprising a processor, a memory, a communication interface, the processor, the memory and the communication interface being interconnected and performing communication therebetween, the memory having executable program code stored thereon, the communication interface being for wireless communication, the processor being for retrieving the executable program code stored thereon and performing some or all of the steps as described in any one of the methods of the first aspect, for example.

In a fourth aspect, the application provides a computer readable storage medium having stored therein electronic data which, when executed by a processor, is adapted to carry out the electronic data to carry out some or all of the steps described in the first aspect of the application.

In a fifth aspect, the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform part or all of the steps described in the first aspect of the application. The computer program product may be a software installation package.

Drawings

In order to more clearly illustrate the application or the technical solutions of the prior art, the drawings which are used in the examples or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some examples of the application and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an energy storage system according to the present application;

FIG. 2 is a schematic flow chart of a charge-discharge method according to the present application;

FIG. 3 is a schematic diagram of a structure of a plurality of slave EMSs according to the present application;

FIG. 4a is a block diagram showing the functional units of a charge and discharge device according to the present application;

FIG. 4b is a block diagram showing the functional units of another charge and discharge device according to the present application;

fig. 5 is a block diagram of an electronic device according to the present application.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution thereof will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described examples are only a part of examples of the present application, not all examples. All other examples, which a person of ordinary skill in the art would obtain without undue burden based on the examples in this disclosure, are within the scope of this disclosure.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps is not limited to the elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an example" means that a particular feature, structure, or characteristic described in connection with the example may be included in at least one example of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same example, nor are separate or alternative examples mutually exclusive of other examples. Those skilled in the art will explicitly and implicitly understand that the examples described herein may be combined with other examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an energy storage system according to the present application, and as shown in fig. 1, the energy storage system 100 includes a master EMS110, a plurality of slave EMS101, and a plurality of power distribution systems 102.

The master EMS110 is a remote EMS for monitoring and controlling each device in the entire energy storage system 100, and in the present application, the master EMS110 is mainly used for monitoring and controlling a plurality of slave EMS101.

The plurality of slave EMSs 101 respectively correspond to the plurality of power distribution systems 102, so that monitoring and control of the plurality of power distribution systems 102 are respectively realized, and the plurality of slave EMSs 102 can communicate with each other, so that communication between the plurality of power distribution systems 102 is realized. Wherein one power distribution system 102 may be a corresponding one of the micro-grids, and the slave EMS102 may be a local controller that monitors and controls one of the micro-grids.

The master EMS110 determines a period of time in which peak clipping or valley filling is required, and peak clipping or valley filling power corresponding to the period of time, and transmits the peak clipping or valley filling power corresponding to the period of time and the period of time to the plurality of slave EMS101. And the plurality of slave EMS communicate with each other, so as to determine the power quantity of the power distribution system corresponding to the slave EMS which needs to cut peaks or fill valleys, and send the power quantity of the power distribution system corresponding to the slave EMS110 which needs to cut peaks or fill valleys. After the master EMS110 passes the audit, execution instructions are issued to the plurality of slave EMS101. After receiving the execution instruction from the EMS101, the plurality of slave EMS101 control the corresponding power distribution system 102 to charge or discharge according to the determined peak clipping power or valley filling power.

The peak clipping refers to that during the power consumption peak period, the EMS system needs to control the energy storage system to discharge so as to relieve the pressure of the power grid, and correspondingly, the power distribution system needs to be controlled to discharge in the application; the valley filling refers to that in the period of low electricity consumption, the EMS system needs to control the energy storage system to charge, and redundant electric quantity is stored, so that the power distribution system needs to be controlled to charge correspondingly.

Based on this, the present application provides a charge and discharge method, and the present application will be described in detail with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flow chart of a charge-discharge method provided by the present application, the method is applied to a slave system in the energy storage system, the slave system includes a plurality of slave EMS in the energy storage system, as shown in fig. 2, the method includes the following steps:

step 201, determining target charge/discharge electric quantities corresponding to the plurality of slave EMS respectively according to the charge/discharge electric quantities required in the first time period, the capacities of the power distribution systems corresponding to the plurality of slave EMS and a preset communication path.

The preset communication paths are used for each slave EMS to receive information sent by other slave EMSs, and the charging/discharging electric quantity required by the first time period is received by the target slave EMS from a master EMS in the energy storage system.

The charge/discharge electric quantity required in the first time period has a corresponding relationship according to the charge/discharge corresponding to the first time period. When the first time period is a time period needing to be charged (corresponding to a grid valley period), the charge/discharge electric quantity required by the first time period is the total electric quantity needing to be charged in the first time period; when the first time period is a time period needing to be discharged (corresponding to a power grid peak time period), the charge/discharge electric quantity required by the first time period is the total electric quantity needing to be discharged in the first time period.

In the application, each power distribution system is provided with one slave EMS, the slave EMSs can communicate with each other, and the target charge/discharge electric quantity corresponding to each slave EMS is determined through the communication between the slave EMSs, so that the burden of the master EMS can be lightened. The target charge/discharge power refers to the power required to be charged or discharged by the target slave EMS in the first period of time.

Specifically, in one possible example, the preset communication path includes a unidirectional circulation communication path, and determining target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS according to the charge/discharge electric quantities required for the first period of time, capacities of the power distribution systems corresponding to the plurality of slave EMS, and the preset communication path, including: a determining step, which comprises: the current target slave EMS determines the target charging/discharging electric quantity corresponding to the current target slave EMS according to the current charging/discharging electric quantity and the capacity of a power distribution system corresponding to the current target slave EMS; the target slave EMS sends the required auxiliary charge/discharge electric quantity to the next slave EMS according to a preset unidirectional circulation communication path, the next slave EMS is set as a new target slave EMS, at least the auxiliary charge/discharge electric quantity is set as a new charge/discharge electric quantity, and the new target slave EMS is designated to execute a determining step until the requirement is met; the meeting requirement includes that the sum of the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the charge/discharge electric quantity required by the first time period, or the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the capacity of the power distribution system corresponding to each of the plurality of slave EMSs.

The determining the target charge/discharge power of the plurality of slave EMS according to the present application means that the charge/discharge power required for the first period is allocated one by the plurality of slave EMS. It is first necessary to determine a target slave EMS as an initially allocated slave EMS, and the target slave EMS will determine a target charge/discharge power amount according to a charge/discharge power amount required for the first period of time, and since the target charge/discharge power amount cannot exceed a capacity of a power distribution system to which the target slave EMS corresponds, it is necessary to determine a target charge/discharge power amount of the target slave EMS according to the charge/discharge power amount required for the first period of time and the capacity of the power distribution system of the target slave EMS.

It is known that the unidirectional circular communication path means that the transmission and reception of information between the plurality of slave EMS are unidirectional and may form a closed loop of the transmission and reception of information with each other. Referring to fig. 3, fig. 3 is a schematic structural diagram of a plurality of slave EMS according to the present application, where the plurality of slave EMS includes N slave EMS, and the first slave EMS may send communication information to the second slave EMS, and the second slave EMS may send communication information to the third slave EMS, and the third slave EMS may send communication information to the fourth slave EMS, so as to push the same until the nth slave EMS sends communication information to the target slave EMS, thereby forming a unidirectional cyclic communication path. In this way, when the electric quantity distribution shown in the example is performed, the slave EMS which has already distributed the electric quantity can be prevented from receiving distribution information of other slave EMSs.

Specifically, when the charge/discharge electric quantity required by the first time period is not greater than the capacity of the target slave EMS power distribution system, then only the charge/discharge electric quantity required by the first time period needs to be distributed to the target slave EMS; when the charge/discharge electric quantity required by the first time period is greater than the capacity of the target slave EMS system, the capacity of the power distribution system corresponding to the target slave EMS is distributed to the target slave EMS, and the redundant unassigned electric quantity (auxiliary charge/discharge electric quantity) is sent to the next slave EMS for distribution, namely the next slave EMS determines the target charge/discharge electric quantity corresponding to the slave EMS according to the auxiliary charge/discharge electric quantity and the capacity of the power distribution system corresponding to the slave EMS, if the slave EMS is unassigned, the next slave EMS corresponding to the slave EMS is required to continue distribution, and so on.

Specifically, in one possible example, when the current charge/discharge power is not greater than the capacity of the power distribution system to which the current target slave EMS corresponds, the required auxiliary charge/discharge power is transmitted to the next slave EMS to be zero; when the current charge/discharge electric quantity is larger than the capacity of the power distribution system corresponding to the current target slave EMS, the required auxiliary charge/discharge electric quantity is sent to the next slave EMS to be the difference between the current charge/discharge electric quantity and the capacity of the power distribution system corresponding to the current target slave EMS.

For example, if there are 4 slave EMS, the charge/discharge power required for the first period is 50, at this time, the capacity of the power distribution system corresponding to the first slave EMS is 15, the capacity of the power distribution system corresponding to the second slave EMS is 20, the capacity of the power distribution system corresponding to the third slave EMS is 30, and the capacity of the power distribution system corresponding to the fourth slave EMS is 20. If the first slave EMS is the target slave EMS initially allocated, since the capacity of the power distribution system corresponding to the first slave EMS is 15, the target charge/discharge power of the first slave EMS is 15, and the auxiliary charge/discharge power of 35 is sent to the next slave EMS, i.e., the second slave EMS, and the second slave EMS is set as the new target slave EMS, and the auxiliary charge/discharge power of 35 is set as the new charge/discharge power; and because the capacity of the power distribution system corresponding to the second slave EMS is 20, the second slave EMS determines that the target charge/discharge power corresponding to the second slave EMS is 20 according to the new charge/discharge power 35, and transmits the auxiliary charge/discharge power of 15 to the third slave EMS, and sets the third slave EMS as the new target slave EMS, and sets the auxiliary charge/discharge power 15 as the new charge/discharge power; since the capacity of the power distribution system corresponding to the third slave EMS is 30, it can be determined that the target charge/discharge power amount of the third slave EMS is 15. At this time, the charge/discharge power distribution required for the first period is completed.

The capacity of the power distribution system corresponding to the target slave EMS refers to the capacity of an energy storage battery in the power distribution system corresponding to the target slave EMS.

Furthermore, in another possible example, before the determining step, the method further comprises: the target slave EMS determines first target charge/discharge electric quantity corresponding to the plurality of slave EMSs according to the ratio between the charge/discharge electric quantity required by the first time period and the quantity of the plurality of slave EMSs; after setting a first target charge/discharge power corresponding to the target slave EMS to a new charge/discharge power, performing an operation of the determining step; setting at least the auxiliary charge/discharge capacity to a new charge/discharge capacity, comprising: the sum of the auxiliary charge/discharge power amount and the first target charge/discharge power amount corresponding to the new target slave EMS is set as the new charge/discharge power amount.

In addition to distributing the charge/discharge power required by the determined first time period to a plurality of slave EMSs one by one, each slave EMS can participate in peak clipping and valley filling regulation. The charge/discharge power required for the first period of time may be equally distributed to the plurality of slave EMS, i.e., the first target charge/discharge power is determined according to a ratio between the charge/discharge power required for the first period of time and the number of the plurality of slave EMS. However, such allocation may be performed by a plurality of slave EMS, some of which may be allocated to other slave EMS due to the capacity of the corresponding power distribution system being smaller than the first target charge/discharge power. Thus, in the present example, in performing the power distribution shown in the previous example, the first target charge/discharge power is determined as the new charge/discharge power of the target slave EMS in the determining step, and if the capacity of the power distribution system to which the target slave EMS corresponds is smaller than the first target charge/discharge power, a corresponding auxiliary charge/discharge power is generated, and the auxiliary charge/discharge power is transmitted to the next slave EMS, and the new charge/discharge power to which the next slave EMS corresponds is the sum of the auxiliary charge/discharge power and the first target charge/discharge power.

Specifically, in one possible example, the method further includes: when the current charge/discharge electric quantity is not more than the capacity of the distribution system corresponding to the current target slave EMS, the auxiliary charge/discharge electric quantity required by the next slave EMS is sent to be zero; when the current charge/discharge electric quantity is larger than the capacity of the power distribution system corresponding to the current target slave EMS, the required auxiliary charge/discharge electric quantity is sent to the next slave EMS to be the difference between the current charge/discharge electric quantity and the capacity of the power distribution system corresponding to the current target slave EMS.

For example, if there are 4 slave EMS, the amount of charge/discharge power required for the first period is 60, at this time, the capacity of the power distribution system corresponding to the first slave EMS is 10, the capacity of the power distribution system corresponding to the second slave EMS is 20, the capacity of the power distribution system corresponding to the third slave EMS is 13, and the capacity of the power distribution system corresponding to the fourth slave EMS is 20. At this time, the first target charge/discharge power amount may be determined to be 15, the first slave EMS may be determined to be the target slave EMS first, and since the capacity of the power distribution system corresponding to the first slave EMS is 10, the target charge/discharge power amount of the first slave EMS may be determined to be 10, and the auxiliary charge/discharge power amount of 5 needs to be transmitted to the second slave EMS, and the second slave EMS is designated as a new target slave EMS, and the new charge/discharge power amount corresponding to the second slave EMS is 15+5=20; since the capacity of the power distribution system corresponding to the second slave EMS is 20, it may be determined that the target charge/discharge power of the second slave EMS is 20, and no auxiliary charge/discharge power is required to be sent to the third slave EMS, where the third slave EMS is determined to be a new target slave EMS and the new charge/discharge power corresponding to the third slave EMS is 15; since the capacity of the power distribution system corresponding to the third slave EMS is 13, it may be determined that the target charge/discharge power of the third slave EMS is 13, and the auxiliary charge/discharge power of 2 needs to be transmitted to the fourth slave EMS, and the fourth slave EMS is determined as a new target slave EMS, where the new charge/discharge power corresponding to the fourth slave EMS is 15+2=17; since the capacity of the power distribution system corresponding to the fourth slave EMS is 20, it can be determined that the target charge/discharge power amount of the fourth slave EMS is 17. At this time, all of the charge/discharge power required for the first period is allocated.

In addition, the above-mentioned process of electric quantity distribution may be a parallel distribution process, that is, for four slave EMS, it is not necessarily only possible to start distribution from the first slave EMS, but four slave EMS may all be performed simultaneously, that is, the first slave EMS may directly determine that its own target charge/discharge electric quantity is 10, and send the auxiliary charge/discharge electric quantity of 5 to the second slave EMS, and the second slave EMS may determine that its own target charge/discharge electric quantity is 15 before receiving the auxiliary charge/discharge electric quantity 5, but determine that its own corresponding target charge/discharge electric quantity is 20 after receiving the auxiliary charge/discharge electric quantity 5.

In addition, in another possible example, determining a plurality of target charge/discharge electric quantities respectively corresponding to the slave EMS according to the charge/discharge electric quantities required for the first period of time, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and the preset communication path includes: for each slave EMS, each slave EMS obtains the total capacity of a power distribution system corresponding to the plurality of slave EMSs through a preset communication path; if the ratio of the charge/discharge power required by the first time period to the total capacity of the power distribution systems is greater than the preset ratio, each slave EMS determines the target charge/discharge power of each slave EMS according to the first ratio of the capacity of each slave EMS system to the total capacity of the power distribution systems and the charge/discharge power required by the first time period, wherein the higher the first ratio is, the higher the target charge/discharge power is.

In addition to equally distributing the charge/discharge power required for the first period to the plurality of slave EMS, the target charge/discharge power corresponding to each slave EMS may be determined according to a ratio between capacities of the power distribution systems corresponding to the plurality of slave EMS. Specifically, for each slave EMS, each slave EMS determines the target charge/discharge power of each slave EMS according to a first proportion of the capacity of the power distribution system corresponding to each slave EMS to the total capacity of the power distribution systems corresponding to the plurality of slave EMS and the charge/discharge power required for the first period, and the higher the first proportion is, the higher the target charge/discharge power is. Thus, a plurality of target charge/discharge electric quantities which are distributed from EMS to the corresponding capacities of the distribution systems can be ensured, and the charge/discharge efficiency of the distribution systems in the whole energy storage system is improved.

Also, in one possible example, the method further comprises: if the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the power distribution systems is not greater than a preset ratio, each slave EMS acquires the charge/discharge efficiency of the power distribution systems corresponding to the slave EMS through a preset communication path; the method comprises the steps that each slave EMS respectively determines target charging/discharging electric quantity of each slave EMS according to a second proportion of the chargeable/dischargeable quantity of each slave EMS in a first time period to the chargeable/dischargeable quantity of a plurality of slave EMSs in the first time period and the charging/dischargeable electric quantity required by the first time period, wherein the higher the second proportion is, the higher the target charging/discharging electric quantity is, the chargeable/dischargeable quantity of each slave EMS in the first time period is the product of the charging/discharging efficiency of each slave EMS and the target duration, the chargeable/dischargeable quantity of the plurality of slave EMSs in the first time period is the product of the charging/discharging efficiency of the plurality of slave EMSs and the target duration, and the target duration is the duration corresponding to the first time period.

The charging efficiency of the power distribution system may be considered in addition to the capacity corresponding to the power distribution system. When the ratio of the charge/discharge power required in the first period to the total capacity of the power distribution systems is greater than the preset ratio, the capacity of the whole power distribution systems is considered first, and the limitation of the capacity of the power distribution systems is overcome due to the fact that the charge/discharge efficiency is high. When the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the plurality of power distribution systems is not larger than the preset ratio, the electric quantity required by the whole of the plurality of power distribution systems is smaller, the influence of the capacity of the power distribution systems on the completion of charge/discharge of the power distribution systems is lower, and the capacity of the whole of the plurality of power distribution systems is not taken as a primary consideration.

Therefore, when the ratio of the charge/discharge power required by the first time period to the total capacity of the plurality of power distribution systems is not greater than the preset ratio, each slave EMS determines the target charge/discharge power of each slave EMS according to the second ratio of the capacity of the power distribution system corresponding to each slave EMS to the total capacity of the plurality of power distribution systems and the charge/discharge power required by the first time period, wherein the higher the second ratio is, the higher the target charge/discharge power is.

In the embodiment of the application, the charging/discharging efficiency of the power distribution system in the whole energy storage system can be improved by considering the charging/discharging efficiency of the slave EMS to determine the target charging/discharging electric quantity of the slave EMS.

Step 202, the target charge/discharge electric quantity corresponding to each of the plurality of slave EMS is sent to the power distribution system corresponding to the plurality of slave EMS, so that the power distribution system corresponding to the plurality of slave EMS performs charge/discharge control.

The plurality of slave EMS may further send the target charge/discharge power amounts corresponding to the plurality of slave EMS to the master EMS, and the master EMS performs audit determination on the target charge/discharge power amounts corresponding to the plurality of slave EMS. The auditing may include: the sum of the target charge/discharge electric quantity of the plurality of slave EMSs is not less than the charge/discharge electric quantity required for the first period, and the target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs is not greater than the capacity or the chargeable capacity of the power distribution system respectively corresponding to the plurality of slave EMSs. If the total capacity of the power distribution systems corresponding to the plurality of slave EMS is smaller than the charge/discharge electric quantity required by the first period, the difference between the two may be sent to the master EMS, and the master EMS may perform subsequent processing.

In addition, in one possible example, the preset communication path includes a unidirectional circulation communication path, and after the target charge/discharge electric quantity corresponding to each of the plurality of slave EMS is transmitted to the power distribution system corresponding to the plurality of slave EMS, so that the power distribution system corresponding to the plurality of slave EMS performs charge/discharge control, the method further includes: for each slave EMS, if the current slave EMS does not receive the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a second electric quantity to the second slave EMS, the second electric quantity is a difference value between the target charge/discharge electric quantity of the current slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS, the first electric quantity is a difference value between the required charge/discharge electric quantity of the first slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the first slave EMS, the first slave EMS is the last slave EMS of the current slave EMS determined according to a preset unidirectional circulation communication path, and the second slave EMS is the next slave EMS of the current slave EMS determined according to the preset unidirectional circulation communication path; if the current slave EMS receives the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a third electric quantity to the second slave EMS, wherein the third electric quantity is the difference value between the sum of the target charge/discharge electric quantity of the current slave EMS and the first electric quantity of the first slave EMS and the actual charge/discharge quantity of the current slave EMS; if the first electric quantity from the first slave EMS is currently received from the slave EMS, and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is not less than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends fourth electric quantity to the power distribution system corresponding to the current slave EMS so that the power distribution system corresponding to the current slave EMS performs charge/discharge control according to the fourth electric quantity, the fourth electric quantity is the difference value between the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period and the target charge/discharge electric quantity of the current slave EMS, and the fifth electric quantity is the difference value between the first electric quantity and the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period.

When the current slave EMS in each slave EMS controls the power distribution system to charge/discharge in the first period of time, there may be a case where the actual charge/discharge amount of the power distribution system is smaller than the target charge/discharge amount of the current slave EMS due to a fault or other reasons of the power distribution system. This, if any, results in the overall energy storage system being charged/discharged less than the charge/discharge required for the first period of time. Therefore, the application realizes the mutual coordination of a plurality of power distribution systems through the communication among a plurality of slave EMSs, and further completes the unfinished target charging/discharging electric quantity of the target slave EMS through other power distribution systems.

Specifically, the current slave EMS may receive an unfinished target charge/discharge power amount from a last slave EMS (first slave EMS) of the current slave EMS determined according to a preset unidirectional cyclic communication path. If the current slave EMS does not receive the unfinished charge/discharge amount (first electric amount) from the first slave EMS and the current slave EMS detects that the actual charge/discharge amount of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge amount of the current slave EMS, the current slave EMS may send a difference between the target charge/discharge amount of the current slave EMS and the actual charge amount of the power distribution system corresponding to the current slave EMS to the next slave EMS (second slave EMS) of the current slave EMS determined according to the preset unidirectional circulation communication path, so that the second slave EMS decides to process by itself or continue to send the second slave EMS to the next slave EMS of the second slave EMS according to the actual condition of the power distribution system corresponding to the second slave EMS to supplement the unfinished target charge/discharge amount of the current slave EMS.

If the current slave EMS receives the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS needs to send the unfinished required charge/discharge electric quantity (the required charge/discharge electric quantity comprises the target charge/discharge electric quantity corresponding to the current slave EMS and the first electric quantity sent by the first slave EMS) of the power distribution system corresponding to the current slave EMS to the second slave EMS, so that the second slave EMS decides to process by itself or send the second slave EMS to the next slave EMS of the second slave EMS according to the actual condition of the power distribution system corresponding to the second slave EMS to supplement the unfinished required charge/discharge electric quantity of the current slave EMS.

If the current slave EMS receives the first power from the first slave EMS and the current slave EMS detects that the actual charge/discharge amount of the power distribution system corresponding to the current slave EMS is not less than the target charge/discharge amount of the current slave EMS, the current slave EMS completes the first power of the first slave EMS according to the remaining chargeable/dischargeable capacity (the capacity refers to the capacity that can be charged/discharged when the power distribution system corresponding to the current slave EMS completes the charge/discharge amount of the target charge/discharge amount). If the incomplete charge/discharge amount (fifth electric amount) exists, the fifth electric amount is sent to the second slave EMS, so that the second slave EMS decides to process by itself or send the second slave EMS to the next slave EMS of the second slave EMS according to the actual situation of the power distribution system corresponding to the second slave EMS to supplement the incomplete fifth electric amount of the current slave EMS.

In the embodiment of the application, the communication among the plurality of power distribution systems is realized through the communication among the plurality of slave EMSs, when the actual charge/discharge capacity of the power distribution system is smaller than the corresponding charge/discharge capacity required by the power distribution system due to the fault of the power distribution system or other reasons, the unfinished charge or discharge capacity of the power distribution system is supplemented by other power distribution systems with more residual charge/discharge capacities, so that the charge or discharge workload of the plurality of power distribution systems in the whole energy storage system is ensured.

According to the application, the plurality of slave EMSs are respectively arranged on the plurality of power distribution systems to respectively monitor and control the plurality of power distribution systems, and the plurality of slave EMSs can communicate with each other, so that the barrier that the plurality of power distribution systems cannot communicate with each other is broken. When the plurality of slave EMSs determine the required charge amount or the required discharge amount respectively corresponding to the plurality of slave EMSs according to the charge amount or the discharge amount corresponding to the time period required to be charged or discharged from the master EMS and the preset communication paths among the plurality of slave EMSs, the operation burden of the master EMS is reduced.

In accordance with the above-mentioned example, referring to fig. 4a, fig. 4a is a block diagram of functional units of a charging and discharging device provided by the present application, as shown in fig. 4a, the charging and discharging device 40 is applied to a slave system in an energy storage system, the slave system includes a plurality of slave energy management systems EMS, the plurality of slave EMS correspond to a plurality of power distribution systems in the energy storage system, and the charging and discharging device 40 includes:

A determining unit 401, configured to determine target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS according to the charge/discharge electric quantities required in the first period, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and a preset communication path; the preset communication paths are used for receiving information sent by other slave EMSs by the slave EMSs, and the charging/discharging electric quantity required by the first time period is received by the master EMS in the target slave EMS slave energy storage system;

and a transmitting unit 402, configured to transmit target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS to power distribution systems corresponding to the plurality of slave EMS, so as to make the plurality of power distribution systems corresponding to the plurality of slave EMS perform charge/discharge control.

In one possible example, the preset communication path includes a unidirectional circulation communication path, and the determining unit 401 is configured to determine target charge/discharge electric quantities respectively corresponding to the plurality of slave EMS according to charge/discharge electric quantities required for the first period, capacities of power distribution systems corresponding to the plurality of slave EMS, and the preset communication path, including: a determining step, which comprises: the current target slave EMS determines the target charging/discharging electric quantity corresponding to the current target slave EMS according to the current charging/discharging electric quantity and the capacity of a power distribution system corresponding to the current target slave EMS; the target slave EMS sends the required auxiliary charge/discharge electric quantity to the next slave EMS according to a preset unidirectional circulation communication path, the next slave EMS is set as a new target slave EMS, at least the auxiliary charge/discharge electric quantity is set as a new charge/discharge electric quantity, and the new target slave EMS is designated to execute a determining step until the requirement is met; the meeting requirement includes that the sum of the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the charge/discharge electric quantity required by the first time period, or the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the capacity of the power distribution system corresponding to each of the plurality of slave EMSs.

In a possible example, before the determining step, the determining unit 401 is further configured to: the target slave EMS determines first target charge/discharge electric quantity corresponding to the plurality of slave EMSs according to the ratio between the charge/discharge electric quantity required by the first time period and the quantity of the plurality of slave EMSs; setting the first target charge/discharge electric quantity corresponding to the target slave EMS as a new charge/discharge electric quantity, and entering a determining step; setting at least the auxiliary charge/discharge capacity to a new charge/discharge capacity, comprising: the sum of the auxiliary charge/discharge power amount and the first target charge/discharge power amount corresponding to the new target slave EMS is set as the new charge/discharge power amount.

In a possible example, the determining unit 401 is further configured to: when the current charge/discharge electric quantity is not more than the capacity of the distribution system corresponding to the current target slave EMS, the auxiliary charge/discharge electric quantity required by the next slave EMS is sent to be zero; when the current charge/discharge electric quantity is larger than the capacity of the power distribution system corresponding to the current target slave EMS, the required auxiliary charge/discharge electric quantity is sent to the next slave EMS to be the difference between the current charge/discharge electric quantity and the capacity of the power distribution system corresponding to the current target slave EMS.

In one possible example, the determining unit 401 is configured to determine, according to a charge/discharge power required for the first period of time, a capacity of a power distribution system corresponding to the plurality of slave EMS, and a preset communication path, target charge/discharge power corresponding to the plurality of slave EMS, respectively, including: for each slave EMS, each slave EMS obtains the total capacity of a power distribution system corresponding to the plurality of slave EMSs through a preset communication path; if the ratio of the charge/discharge power required by the first time period to the total capacity of the power distribution systems is greater than the preset ratio, each slave EMS determines the target charge/discharge power of each slave EMS according to the first ratio of the capacity of the power distribution system corresponding to each slave EMS to the total capacity of the power distribution systems and the charge/discharge power required by the first time period, wherein the higher the first ratio is, the higher the target charge/discharge power is.

In a possible example, the determining unit 401 is further configured to: if the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the power distribution systems is not greater than a preset ratio, each slave EMS acquires the charge/discharge efficiency of the power distribution systems corresponding to the slave EMS through a preset communication path; the method comprises the steps that each slave EMS respectively determines target charging/discharging electric quantity of each slave EMS according to a second proportion of the chargeable/dischargeable quantity of each slave EMS in a first time period to the chargeable/dischargeable quantity of a plurality of slave EMSs in the first time period and the charging/dischargeable electric quantity required by the first time period, wherein the higher the second proportion is, the higher the target charging/discharging electric quantity is, the chargeable/dischargeable quantity of each slave EMS in the first time period is the product of the charging/discharging efficiency of each slave EMS and the target duration, the chargeable/dischargeable quantity of the plurality of slave EMSs in the first time period is the product of the charging/discharging efficiency of the plurality of slave EMSs and the target duration, and the target duration is the duration corresponding to the first time period.

In one possible example, the preset communication path includes a unidirectional circulation communication path, and after the transmitting unit 402 is configured to transmit the target charge/discharge power amounts respectively corresponding to the plurality of slave EMS to the power distribution systems corresponding to the plurality of slave EMS, so that the power distribution systems corresponding to the plurality of slave EMS perform charge/discharge control, the apparatus further includes: for each slave EMS, if the current slave EMS does not receive the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a second electric quantity to the second slave EMS, the second electric quantity is a difference value between the target charge/discharge electric quantity of the current slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS, the first electric quantity is a difference value between the required charge/discharge electric quantity of the first slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the first slave EMS, the first slave EMS is the last slave EMS of the current slave EMS determined according to a preset unidirectional circulation communication path, and the second slave EMS is the next slave EMS of the current slave EMS determined according to the preset unidirectional circulation communication path; if the current slave EMS receives the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends a third electric quantity to the second slave EMS, wherein the third electric quantity is the difference value between the sum of the target charge/discharge electric quantity of the current slave EMS and the first electric quantity of the first slave EMS and the actual charge/discharge quantity of the current slave EMS; if the first electric quantity from the first slave EMS is currently received from the slave EMS, and the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is not less than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends fourth electric quantity to the power distribution system corresponding to the current slave EMS so that the power distribution system corresponding to the current slave EMS performs charge/discharge control according to the fourth electric quantity, the fourth electric quantity is the difference value between the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period and the target charge/discharge electric quantity of the current slave EMS, and the fifth electric quantity is the difference value between the first electric quantity and the residual chargeable/discharge capacity of the power distribution system corresponding to the current slave EMS in the first time period.

It can be understood that, since the method example and the apparatus example are different presentation forms of the same technical concept, the content of the method example portion in the present application should be synchronously adapted to the apparatus example portion, which is not described herein.

In the case of using an integrated unit, as shown in fig. 4b, fig. 4b is a block diagram of functional units of another charge and discharge apparatus provided by the present application. In fig. 4b, the charge and discharge device 41 includes: a processing module 412 and a communication module 411. The processing module 412 is used to control and manage the actions of the charging and discharging device, e.g., the steps of the determining unit 401 and the transmitting unit 402, and/or other processes for performing the techniques described herein. The communication module 411 is used to support interaction between the charging and discharging device and other devices. As shown in fig. 4b, the charging and discharging device 41 may further comprise a memory module 413, the memory module 413 being configured to store program codes and data of the charging and discharging device.

The processing module 412 may be a processor or controller, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. A processor may also be a combination that performs computing functions, e.g., including one or more microprocessors, a combination of a DSP and a microprocessor, and so forth. The communication module 411 may be a transceiver, an RF circuit, or a communication interface, etc. The memory module 413 may be a memory.

All relevant contents of each scenario related to the above method example may be cited to the functional description of the corresponding functional module, which is not described herein. The charge/discharge device 41 may perform the charge/discharge method shown in fig. 2.

The above examples may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the examples described above may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions in accordance with the present application are fully or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired or wireless means from one website site, computer, server, or data center. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc. that contain one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

Fig. 5 is a block diagram of an electronic device according to the present application. As shown in fig. 5, the electronic device 500 may include one or more of the following components: a processor 501, a memory 502 coupled to the processor 501, wherein the memory 502 may store one or more computer programs that may be configured to implement the methods described in the examples above when executed by the one or more processors 501.

The processor 501 may include one or more processing cores. The processor 501 utilizes various interfaces and lines to connect various portions of the overall electronic device 500, perform various functions of the electronic device 500, and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 502, and invoking data stored in the memory 502. Alternatively, the processor 501 may be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field-Programmable gate array (FPGA), programmable Logic Array (PLA). The processor 501 may integrate one or a combination of several of a central processing unit (CentralProcessing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. It will be appreciated that the modem may not be integrated into the processor 501 and may be implemented solely by a single communication chip.

The Memory 502 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (ROM). Memory 502 may be used to store instructions, programs, code sets, or instruction sets. The memory 502 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing examples of the respective methods described above, and the like. The storage data area may also store data created by the electronic device 500 in use, and the like.

It is to be appreciated that the electronic device 500 may include more or fewer structural elements than those described in the above-described block diagrams, including, for example, a power module, physical key, wiFi (Wireless Fidelity ) module, speaker, bluetooth module, sensor, etc., without limitation.

The charge and discharge device 40, the charge and discharge device 41, and the electronic device 500 may be a part of the plurality of slave EMS101 in the energy storage system 100 or may be a device independent from the energy storage system 100.

The present application provides a computer-readable storage medium in which program data is stored which, when executed by a processor, is adapted to carry out part or all of the steps of any one of the charge-discharge methods described in the above method examples.

The present application also provides a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform part or all of the steps of any one of the charge-discharge methods described in the method examples above. The computer program product may be a software installation package.

It should be noted that, for simplicity of description, the method examples of any of the foregoing charge and discharge methods are all described as a series of combinations of actions, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, it should be understood by those skilled in the art that the examples described in the specification are preferred examples and that the actions involved are not necessarily required for the present application.

Although the application is described herein in connection with various examples, other variations to the disclosed examples can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the figures, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the method examples of any of the charge-discharge methods described above may be accomplished by a program that instructs associated hardware, the program may be stored in a computer readable memory, the memory may comprise: flash disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

The foregoing has outlined rather broadly the more detailed description of the application, and the detailed description of the application that follows may be better understood as being a description of the principles and embodiments of a charge and discharge method and apparatus according to the present application; meanwhile, as for those skilled in the art, according to the idea of a charge and discharge method and apparatus of the present application, there are various changes in the specific embodiments and application ranges, and in summary, the present disclosure should not be construed as limiting the present application.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, hardware products, and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be appreciated that any product of the processing method of the flowcharts described in connection with the method examples of a method of controlling or being configured to perform a charging and discharging method of the present application, such as the terminals of the flowcharts described above and computer program products, falls within the scope of the related products described in connection with the present application.

It will be apparent to those skilled in the art that various modifications and variations can be made in a charge and discharge method and apparatus provided herein without departing from the spirit and scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of charging and discharging, the method being applied to a slave system in an energy storage system, the slave system comprising a plurality of slave energy management systems EMS corresponding to a plurality of power distribution systems in the energy storage system, the method comprising:

determining target charge/discharge electric quantity corresponding to the plurality of slave EMSs respectively according to the charge/discharge electric quantity required by the first time period, the capacity of the power distribution system corresponding to the plurality of slave EMSs and a preset communication path; the preset communication paths are used for receiving information sent by other slave EMSs from the slave EMSs, and the charging/discharging electric quantity required by the first time period is received by the target slave EMS from a master EMS in the energy storage system;

and transmitting the target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs to the power distribution system corresponding to the plurality of slave EMSs so as to control the charge/discharge of the power distribution system corresponding to the plurality of slave EMSs.

2. The method of claim 1, wherein the predetermined communication path comprises a unidirectional cyclical communication path, and wherein determining the respective target charge/discharge capacities of the plurality of slave EMS based on the charge/discharge capacities required for the first time period, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and the predetermined communication path comprises:

a determining step, the determining step comprising: the current target slave EMS determines the current target charging/discharging electric quantity corresponding to the target slave EMS according to the current charging/discharging electric quantity and the capacity of a power distribution system corresponding to the current target slave EMS;

the target slave EMS sends the required auxiliary charge/discharge electric quantity to the next slave EMS according to a preset unidirectional circulation communication path, the next slave EMS is set to be a new target slave EMS, at least the auxiliary charge/discharge electric quantity is set to be a new charge/discharge electric quantity, and the new target slave EMS is designated to execute the determining step until the requirement is met;

the meeting requirement includes that the sum of the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the charge/discharge electric quantity required by the first time period, or that the target charge/discharge electric quantity corresponding to each of the plurality of slave EMSs is not smaller than the capacity of the power distribution system corresponding to each of the slave EMSs.

3. The method of claim 2, wherein prior to the determining step, the method further comprises:

the target slave EMS determines first target charge/discharge electric quantity corresponding to the plurality of slave EMSs respectively according to the ratio between the charge/discharge electric quantity required by the first time period and the quantity of the plurality of slave EMSs;

after setting the first target charge/discharge electric quantity corresponding to the target slave EMS among the plurality of slave EMS to a new charge/discharge electric quantity, performing an operation of the determining step;

the setting at least the auxiliary charge/discharge capacity to a new charge/discharge capacity includes:

and setting the sum of the auxiliary charge/discharge electric quantity and the first target charge/discharge electric quantity corresponding to the new target slave EMS as a new charge/discharge electric quantity.

4. A method according to claim 2 or 3, characterized in that the method further comprises:

when the current charge/discharge electric quantity is not more than the capacity of the power distribution system corresponding to the current target slave EMS, the auxiliary charge/discharge electric quantity required by the next slave EMS is sent to be zero;

and when the current charge/discharge electric quantity is larger than the capacity of the power distribution system corresponding to the current target slave EMS, sending the required auxiliary charge/discharge electric quantity to the next slave EMS to be the difference between the current charge/discharge electric quantity and the capacity of the power distribution system corresponding to the current target slave EMS.

5. The method of claim 1, wherein determining the target charge/discharge power amounts respectively corresponding to the plurality of slave EMS according to the charge/discharge power amounts required for the first period of time, the capacities of the power distribution systems corresponding to the plurality of slave EMS, and a preset communication path, comprises:

for each slave EMS, each slave EMS obtains the total capacity of the power distribution system corresponding to the plurality of slave EMSs through the preset communication path;

and if the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the power distribution systems corresponding to the plurality of slave EMSs is greater than a preset ratio, each slave EMS determines the target charge/discharge electric quantity of each slave EMS according to the first ratio of the capacity of the power distribution system corresponding to each slave EMS to the total capacity of the power distribution systems corresponding to the plurality of slave EMSs and the charge/discharge electric quantity required by the first time period, wherein the higher the first ratio is, the higher the target charge/discharge electric quantity is.

6. The method of claim 5, wherein the method further comprises:

if the ratio of the charge/discharge electric quantity required by the first time period to the total capacity of the power distribution systems corresponding to the plurality of slave EMSs is not greater than a preset ratio, each slave EMS obtains the charge/discharge efficiency of the power distribution systems corresponding to the plurality of slave EMSs through the preset communication path;

Each slave EMS determines a target charge/discharge capacity of each slave EMS according to a second proportion of a chargeable/dischargeable capacity of each slave EMS in a first period to a chargeable/dischargeable capacity of each slave EMS in the first period and a charge/discharge capacity required for the first period, wherein the higher the second proportion is, the higher the target charge/discharge capacity is, the chargeable/dischargeable capacity of each slave EMS in the first period is a product of a charge/discharge efficiency of each slave EMS and a target duration, and the chargeable/dischargeable capacities of the plurality of slave EMS in the first period is a product of the charge/discharge efficiencies of the plurality of slave EMS and the target duration, and the target duration is a duration corresponding to the first period.

7. The method of claim 1, wherein the preset communication path comprises a unidirectional cyclic communication path, and after the transmitting the target charge/discharge power amounts respectively corresponding to the plurality of slave EMS to the power distribution systems corresponding to the plurality of slave EMS to cause the power distribution systems corresponding to the plurality of slave EMS to perform charge/discharge control, the method further comprises:

for each slave EMS, if the slave EMS does not receive a first electric quantity from a first slave EMS and the slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the slave EMS is smaller than the target charge/discharge electric quantity of the slave EMS, the slave EMS sends a second electric quantity to a second slave EMS, wherein the second electric quantity is a difference value between the target charge/discharge electric quantity of the slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the slave EMS, the first electric quantity is a difference value between the required charge/discharge electric quantity of the first slave EMS and the actual charge/discharge quantity of the power distribution system corresponding to the first slave EMS, the first slave EMS is a last slave EMS of the slave EMS determined according to a preset unidirectional circulation communication path, and the second slave EMS is a next slave EMS of the slave EMS determined according to the preset unidirectional circulation communication path;

If the slave EMS receives a first electric quantity from the first slave EMS currently and the slave EMS currently detects that the actual charge/discharge quantity of the power distribution system corresponding to the slave EMS currently is smaller than the target charge/discharge electric quantity of the slave EMS currently, the slave EMS currently sends a third electric quantity to the second slave EMS, wherein the third electric quantity is the sum of the target charge/discharge electric quantity of the slave EMS currently and the first electric quantity of the first slave EMS and the difference of the actual charge/discharge quantity of the slave EMS currently;

and if the current slave EMS receives the first electric quantity from the first slave EMS and the current slave EMS detects that the actual charge/discharge quantity of the power distribution system corresponding to the current slave EMS is not smaller than the target charge/discharge electric quantity of the current slave EMS, the current slave EMS sends fourth electric quantity to the power distribution system corresponding to the current slave EMS so that the power distribution system corresponding to the current slave EMS performs charge/discharge control according to the fourth electric quantity, and the current slave EMS sends fifth electric quantity to the second slave EMS, wherein the fourth electric quantity is the difference between the residual chargeable/dischargeable quantity of the power distribution system corresponding to the current slave EMS in a first time period and the target charge/discharge electric quantity of the current slave EMS, and the fifth electric quantity is the difference between the first electric quantity and the residual chargeable/dischargeable quantity of the power distribution system corresponding to the current slave EMS in the first time period.

8. A charging and discharging device, wherein the device is applied to a slave system in an energy storage system, the slave system comprises a plurality of slave Energy Management Systems (EMSs) corresponding to a plurality of power distribution systems in the energy storage system, and the device comprises

A determining unit, configured to determine target charge/discharge electric quantities respectively corresponding to a plurality of slave EMS according to charge/discharge electric quantities required in a first period, capacities of power distribution systems corresponding to the plurality of slave EMS, and a preset communication path; the preset communication path is used for each slave EMS to receive information sent by other slave EMSs, and the charging/discharging electric quantity required by the first time period is received by a target slave EMS from a master EMS in the energy storage system;

and the sending unit is used for sending the target charge/discharge electric quantity respectively corresponding to the plurality of slave EMSs to the power distribution system corresponding to the plurality of slave EMSs so as to control the charge/discharge of the power distribution system corresponding to the plurality of slave EMSs.

9. An electronic device, the device comprising:

the device comprises a processor, a memory and a communication interface, wherein the processor, the memory and the communication interface are mutually connected and complete communication work among each other;

The memory stores executable program codes, and the communication interface is used for wireless communication;

the processor is configured to invoke the executable program code stored on the memory to perform the method of any of claims 1-7.

10. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-7.