CN113629816B - Method and device for distributing charge and discharge power of energy storage group - Google Patents
Method and device for distributing charge and discharge power of energy storage group Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 260
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 75
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- 241000272814 Anser sp. Species 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005314 correlation function Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method and a device for distributing charge and discharge power of an energy storage group, wherein the method calculates the charge and discharge power distribution duty ratio of each energy storage device in the energy storage group according to the principle that the higher the SOC is, the larger the distributed discharge power is and the smaller the distributed charge power is; and finally, carrying out charge and discharge power distribution on the energy storage group according to the charge and discharge power distribution duty ratio of each energy storage device. The invention realizes that the charge power distribution of the energy storage carries out charge distribution according to the inverse proportion of the SOC, and the discharge power distribution of the energy storage carries out discharge distribution according to the direct proportion of the SOC, so that the total power issued is not reduced, and meanwhile, the reasonable distribution of the power is carried out according to the SOC, and finally, the balance of the operation of the energy storage is ensured.
Description
Technical Field
The invention relates to a method and a device for distributing charge and discharge power of an energy storage group, and belongs to the technical field of energy storage regulation and control.
Background
At present, under the background of carbon peak, carbon neutralization strategy, the energy storage technology is continuously permeated into various industries due to the advantages of high adjustment speed, flexible configuration mode and the like, the capacity of a single energy storage is generally smaller than 1MW, and in order to meet the adjustment requirements of capacities of different scales, the single energy storage needs to be operated in parallel to form an energy storage group of corresponding scales so as to meet the adjustment requirements of the energy storage group. The current energy storage group regulating strategy simply equally divides the total energy storage regulating value according to the quantity of the energy storage groups, when different energy storage SOCs in the energy storage groups are inconsistent, the equally divided regulating command aggravates the unbalanced condition of different energy storage in the energy storage groups, meanwhile, the maximum chargeable/dischargeable power of the energy storage after a period of operation is changed, and the maximum chargeable/dischargeable power is not considered at this time, so that the distributed charge/discharge power value is possibly larger than the current maximum chargeable/dischargeable power value of the energy storage, and the total issued power is reduced at this time.
Disclosure of Invention
The invention aims to provide a method and a device for distributing charge and discharge power of an energy storage group, which realize the balance of energy storage capacity in the energy storage group.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a method for distributing charge and discharge power of an energy storage group, which comprises the following steps:
Acquiring a total charge and discharge power instruction of an energy storage group;
Calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
and carrying out charge and discharge power distribution on the energy storage group based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device.
Further, the calculating the charge-discharge power distribution ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group includes:
If the instruction of the total charging power of the energy storage group is received, calculating the charging power distribution duty ratio of the energy storage equipment as follows:
Wherein alpha i is the charging power distribution duty ratio of the ith energy storage device in the energy storage group, SOC i is the SOC value of the ith energy storage device, and N is the number of the energy storage devices in the energy storage group;
if the instruction of the total discharge power of the energy storage group is received, calculating the discharge power distribution duty ratio of the energy storage equipment as follows:
And beta i is the discharge power distribution duty ratio of the ith energy storage device in the energy storage group.
Further, the SOC value of the energy storage device is selected as the integer value.
Further, the charge-discharge power distribution for the energy storage group includes:
If the instruction of the total charging power of the energy storage group is received, the charging power distribution of the energy storage equipment in the energy storage group is carried out according to the following principle:
PCi＝PCi_max-αi*ΔC；
Wherein, P Ci distributes the output charging power for the ith energy storage device, and P Ci _max is the current maximum charging power of the ith energy storage device;
if a total discharge power instruction of the energy storage group is received, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF；
Wherein, P Fi distributes the output discharge power for the ith energy storage device, and P Fi _max is the current maximum discharge power of the ith energy storage device.
Further, the method comprises the steps of,
If delta C is smaller than 0, charging and distributing the energy storage devices according to the current maximum charging power;
and if the delta F is smaller than 0, performing discharge distribution on each energy storage device according to the current maximum discharge power.
Further, the method comprises the steps of,
And (5) uploading the SOC and the charge and discharge power through a goose protocol, and setting a dead zone to upload data.
The invention also provides an energy storage group charging and discharging power distribution device, which comprises:
the instruction module is used for acquiring the total charge and discharge power instruction of the energy storage group;
the calculation module is used for calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
And
The distribution module is used for distributing the charge and discharge power of the energy storage group based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device.
Further, the computing module is specifically configured to,
For an energy storage group total charging power instruction, calculating an energy storage device charging power distribution duty ratio:
Wherein alpha i is the charging power distribution duty ratio of the ith energy storage device in the energy storage group, SOC i is the SOC value of the ith energy storage device, and N is the number of the energy storage devices in the energy storage group;
for an energy storage group total discharge power instruction, calculating a discharge power distribution duty ratio of the energy storage device:
And beta i is the discharge power distribution duty ratio of the ith energy storage device in the energy storage group.
Further, the distribution module is particularly used for,
And for the total charging power instruction of the energy storage group, distributing the charging power of the energy storage equipment in the energy storage group according to the following principle:
PCi＝PCi_max-αi*ΔC；
Wherein, P Ci distributes the output charging power for the ith energy storage device, and P Ci _max is the current maximum charging power of the ith energy storage device;
for the total discharge power instruction of the energy storage group, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF；
Wherein, P Fi distributes the output discharge power for the ith energy storage device, and P Fi _max is the current maximum discharge power of the ith energy storage device.
Further, the distribution module is also used for,
If delta C is smaller than 0, charging and distributing the energy storage devices according to the current maximum charging power;
and if the delta F is smaller than 0, performing discharge distribution on each energy storage device according to the current maximum discharge power.
The beneficial effects of the invention are as follows:
The invention provides a unified energy storage group power distribution method, wherein the charge distribution of stored energy is carried out according to the inverse proportion of SOC, and the charge with high SOC is less; the discharge power distribution of the energy storage is carried out according to the positive proportion of the SOC, the discharge power with high SOC is more, the total power issued is not reduced, meanwhile, the reasonable distribution of the power is carried out according to the SOC, and finally, the balance of the energy storage operation is ensured.
Detailed Description
The invention is further described below. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
When an energy storage group formed by a plurality of energy storage devices exists in the power grid, the energy storage group is used as a unified adjusting object. The maximum chargeable and dischargeable capacity of each energy storage in the energy storage group may be different, and even if the charge and discharge capacity of each energy storage is the first time of design, the maximum dischargeable and chargeable capacities of the energy storage may also change over the running time. When a power regulation command is sent to the energy storage group, the rationality of power distribution, that is, the maximum allowable power output, needs to be considered, and the SOC is large, the charge is small, and the discharge is small. Therefore, the balance of the energy storage capacity can be realized finally, and part of high energy storage SOC and part of low energy storage SOC can not appear.
Based on this, the embodiment of the invention provides a charge and discharge power distribution method for an energy storage group including N energy storage devices, which specifically includes the following steps:
Acquiring a total charge and discharge power instruction of an energy storage group;
Calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
and carrying out charge and discharge power distribution on the energy storage group based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device.
Examples
The embodiment provides a charging power distribution method for an energy storage group, which specifically includes the following steps:
acquiring a total charging power instruction of an energy storage group as P_ csum;
Acquiring the current maximum charging power of each energy storage device in the energy storage group in real time, and calculating the difference delta C between the current total charging capacity of the energy storage group and the received total charging power instruction of the energy storage group:
The P Ci _max is the maximum charging power of the ith energy storage device, wherein the maximum charging power of each energy storage device can be obtained from the energy storage devices in real time, and N is the number of the energy storage devices in the energy storage group.
According to the principle that the allocated charging power is smaller when the SOC is higher, the actual charging power P Ci allocated to each energy storage should be the maximum charging power P Ci _max minus the higher duty cycle Δc, and the duty cycle function may be any positive correlation function, but the positive correlation function needs to satisfy that the sum of all the energy storage powers is still equal to the total charging power of the issued energy storage group, and in this embodiment, a positive proportion function is selected as follows:
The SOC i is the SOC value of the ith energy storage device.
Finally, charging power distribution is carried out on energy storage equipment in the energy storage group according to the following principle:
PCi＝PCi_max-αi*ΔC (3)
Namely:
wherein: p Ci distributes the output charging power for the ith energy storage device.
It can verify that:
example 2
The total discharge power instruction of the energy storage group is obtained as P_ fsum;
Acquiring the current maximum charging power of each energy storage device in the energy storage group in real time, and calculating the difference delta F between the current total charging capacity of the energy storage group and the received total charging power instruction of the energy storage group:
And P Fi _max is the maximum discharge power of the ith energy storage device, wherein the maximum discharge power of each energy storage device can be obtained from the energy storage device in real time, and N is the number of the energy storage devices in the energy storage group.
According to the principle that the higher the SOC is, the greater the allocated discharge power is, the actual charge power P Fi allocated to each energy storage should be the maximum charge power P Fi _max minus the lower duty cycle Δf, and the duty cycle function may be any negative correlation function, but the negative correlation function needs to satisfy that the sum of all the energy storage powers is still equal to the total discharge power of the issued energy storage group, and in this embodiment, the negative ratio function is selected as follows:
The SOC i is the SOC value of the ith energy storage device.
Finally, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF (8)
Namely:
wherein, P Fi distributes the output discharge power for the ith energy storage device.
It can verify that:
In practical application, the SOC value is selected as an integer value instead of a floating point value, so that the problem that the frequent change of the SOC results in frequent issuing of energy storage charging and discharging instructions is avoided, and meanwhile, if telemetry values such as the SOC or active power are interacted in real time through a goose protocol, the telemetry values are required to be set to be sent up according to dead zones, so that network storm is prevented. The voltage current dead zone may be set to 0.2% and the power dead zone may be set to 0.5%. Meanwhile, when the issued charge-discharge instruction is larger than the current total charge-discharge capacity of the energy storage group, each energy storage is charged and discharged according to the maximum charge-discharge power.
The invention also provides a device for adjusting the charge and discharge power of the energy storage group, which comprises:
the instruction module is used for acquiring the total charge and discharge power instruction of the energy storage group;
the calculation module is used for calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
And
The distribution module is used for distributing the charge and discharge power of the energy storage group based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device.
In the embodiment of the invention, the calculation module is specifically used for,
For an energy storage group total charging power instruction, calculating an energy storage device charging power distribution duty ratio:
Wherein alpha i is the charging power distribution duty ratio of the ith energy storage device in the energy storage group, SOC i is the SOC value of the ith energy storage device, and N is the number of the energy storage devices in the energy storage group;
for an energy storage group total discharge power instruction, calculating a discharge power distribution duty ratio of the energy storage device:
And beta i is the discharge power distribution duty ratio of the ith energy storage device in the energy storage group.
In the embodiment of the invention, the distribution module is specifically used for,
And for the total charging power instruction of the energy storage group, distributing the charging power of the energy storage equipment in the energy storage group according to the following principle:
PCi＝PCi_max-αi*ΔC；
Wherein, P Ci distributes the output charging power for the ith energy storage device, and P Ci _max is the current maximum charging power of the ith energy storage device;
for the total discharge power instruction of the energy storage group, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF；
Wherein, P Fi distributes the output discharge power for the ith energy storage device, and P Fi _max is the current maximum discharge power of the ith energy storage device.
In an embodiment of the present invention, the allocation module is further configured to,
If delta C is smaller than 0, charging and distributing the energy storage devices according to the current maximum charging power;
and if the delta F is smaller than 0, performing discharge distribution on each energy storage device according to the current maximum discharge power.
It should be noted that the embodiment of the apparatus corresponds to the embodiment of the method, and the implementation manner of the embodiment of the method is applicable to the embodiment of the apparatus and can achieve the same or similar technical effects, so that the description thereof is omitted herein.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of 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.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (6)
1. The energy storage group charging and discharging power distribution method is characterized by comprising the following steps of:
Acquiring a total charge and discharge power instruction of an energy storage group;
Calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device, the method for distributing the charge and discharge power of the energy storage group comprises the following steps:
If the instruction of the total charging power of the energy storage group is received, the charging power distribution of the energy storage equipment in the energy storage group is carried out according to the following principle:
PCi＝PCi_max-αi*ΔC；
Wherein, P Ci is the charging power of the i-th energy storage device, P Ci _max is the current maximum charging power of the i-th energy storage device, alpha i is the charging power distribution duty ratio of the i-th energy storage device in the energy storage group, N is the number of the energy storage devices in the energy storage group, and P_ csum is the total charging power instruction of the energy storage group;
if delta C is smaller than 0, charging and distributing the energy storage devices according to the current maximum charging power;
if a total discharge power instruction of the energy storage group is received, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF；
Wherein, P Fi is the discharge power of the i-th energy storage device, P Fi _max is the current maximum discharge power of the i-th energy storage device, beta i is the discharge power distribution duty ratio of the i-th energy storage device in the energy storage group, and P fsum is the total discharge power instruction of the energy storage group;
and if the delta F is smaller than 0, performing discharge distribution on each energy storage device according to the current maximum discharge power.
2. The method for distributing charge and discharge power of an energy storage group according to claim 1, wherein the calculating the charge and discharge power distribution ratio of each energy storage device in the energy storage group according to the total charge and discharge power instruction of the energy storage group comprises:
If the instruction of the total charging power of the energy storage group is received, calculating the charging power distribution duty ratio of the energy storage equipment as follows:
The SOC i is the SOC value of the ith energy storage device;
if the instruction of the total discharge power of the energy storage group is received, calculating the discharge power distribution duty ratio of the energy storage equipment as follows:
3. the method for distributing charge and discharge power of an energy storage group according to claim 2, wherein the SOC value of the energy storage device is selected as a model value.
4. The method of claim 2, wherein the SOC and the charge/discharge power are uploaded by a goose protocol, and the dead zone is set for data uploading.
5. An energy storage group charge-discharge power distribution device, comprising:
the instruction module is used for acquiring the total charge and discharge power instruction of the energy storage group;
the calculation module is used for calculating the charge-discharge power distribution duty ratio of each energy storage device in the energy storage group according to the total charge-discharge power instruction of the energy storage group;
And
The distribution module is used for distributing the charge and discharge power of the energy storage group based on the total charge and discharge power instruction of the energy storage group and the charge and discharge power distribution duty ratio of each energy storage device, and specifically comprises the following steps:
And for the total charging power instruction of the energy storage group, distributing the charging power of the energy storage equipment in the energy storage group according to the following principle:
PCi＝PCi_max-αi*ΔC；
Wherein, P Ci is the charging power of the i-th energy storage device, P Ci _max is the current maximum charging power of the i-th energy storage device, alpha i is the charging power distribution duty ratio of the i-th energy storage device in the energy storage group, N is the number of the energy storage devices in the energy storage group, and P_ csum is the total charging power instruction of the energy storage group;
if delta C is smaller than 0, charging and distributing the energy storage devices according to the current maximum charging power;
for the total discharge power instruction of the energy storage group, the discharge power distribution is carried out on the energy storage equipment in the energy storage group according to the following principle:
PFi＝PFi_max-(1/(N-1))βi*ΔF；
Wherein, P Fi is the discharge power of the i-th energy storage device, P Fi _max is the current maximum discharge power of the i-th energy storage device, beta i is the discharge power distribution duty ratio of the i-th energy storage device in the energy storage group, and P fsum is the total discharge power instruction of the energy storage group;
and if the delta F is smaller than 0, performing discharge distribution on each energy storage device according to the current maximum discharge power.
6. The apparatus of claim 5, wherein the computing module is configured to,
For an energy storage group total charging power instruction, calculating an energy storage device charging power distribution duty ratio:
The SOC i is the SOC value of the ith energy storage device;
for an energy storage group total discharge power instruction, calculating a discharge power distribution duty ratio of the energy storage device:
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