CN115940221B - Power distribution method and related device of PCS module group - Google Patents
Power distribution method and related device of PCS module group Download PDFInfo
- Publication number
- CN115940221B CN115940221B CN202211403727.5A CN202211403727A CN115940221B CN 115940221 B CN115940221 B CN 115940221B CN 202211403727 A CN202211403727 A CN 202211403727A CN 115940221 B CN115940221 B CN 115940221B
- Authority
- CN
- China
- Prior art keywords
- pcs module
- module group
- power
- target
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004146 energy storage Methods 0.000 claims abstract description 123
- 238000004364 calculation method Methods 0.000 claims description 60
- 238000007599 discharging Methods 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 4
- 238000004422 calculation algorithm Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 6
- 239000000306 component Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application provides a power distribution method and a related device of a PCS module group, which are used for acquiring an optimal efficiency interval of the PCS module group and a total charge/discharge required power value of an energy storage system under a current working condition; determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge demand power value; and calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group. By implementing the scheme, based on the working execution state of the current energy storage system, the power parameters required to be output by the PCS module groups are calculated through the optimal efficiency interval tracking algorithm, all the PCS module groups are controlled to operate in the optimal efficiency interval, and the overall efficiency of the energy storage system is improved.
Description
Technical Field
The present invention relates to the field of energy storage systems, and in particular, to a power distribution method for a PCS module group and a related apparatus.
Background
The energy storage system is optimized, so that the energy storage system is one of powerful means for improving the core competitiveness of energy storage products, and the high-efficiency energy storage system can bring higher benefits to customers, reduce heat loss and fully utilize energy. In the management of the energy storage system, the PCS (Power Conversion System) module and the energy storage battery in the energy storage system can be subjected to data information acquisition, data processing and energy control through the EMS controller. And the PCS module is a core component of the energy storage system, and conversion between alternating current and direct current can be realized by controlling the PCS module. During the charging/discharging process of the energy storage system, the PCS module has energy loss, and the overall efficiency of the energy storage system is directly influenced by the conversion efficiency of the PCS module.
In the related art, for the management policy of the energy storage system, most of the management policy only considers whether the system meets the charge/discharge power value, that is, only can ensure that the charge/discharge power of the energy storage system is input or output according to the requirement, but in the fixed power distribution mode, different battery packs in the energy storage system operate or stand by according to different powers at the same time, the power distribution is very unreasonable, and the overall operation efficiency of the system is low.
Disclosure of Invention
The main purpose of the embodiment of the invention is to provide a power distribution method and a related device for a PCS module group, which at least can solve the problems of unreasonable power distribution of the PCS module and low overall efficiency of an energy storage system provided in the related technology
To achieve the above object, a first aspect of an embodiment of the present invention provides a power distribution method for a PCS module group, which is applied to an energy storage system, where the energy storage system includes the PCS module group, and the method includes:
acquiring an optimal efficiency interval of a PCS module group and a total charge/discharge demand power value of an energy storage system under a current working condition, wherein the PCS module group comprises a plurality of sub PCS module groups;
determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge required power value;
and calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group.
A second aspect of the embodiments of the present application provides a power distribution device for a PCS module group, which is applied to an energy storage system, wherein the energy storage system includes a PCS module group, and the device includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring an optimal efficiency interval of a PCS module group and a total charge/discharge demand power value of an energy storage system under a current working condition, and the PCS module group comprises a plurality of sub PCS module groups;
the determining module is used for combining the optimal efficiency interval and the total charge/discharge required power value to determine a target distribution mode of the PCS module group;
and the calculating module is used for calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group.
A third aspect of the embodiments of the present application provides an energy storage system, including a PCS module group, an EMS controller, and a battery pack, where the EMS controller includes a memory and a processor; the processor is configured to execute a computer program stored on the memory; the processor implements each step in the power distribution method of the PCS module group provided in the first aspect of the embodiment of the present application when executing the computer program.
A fourth aspect of the present embodiment provides a computer readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements each step in the power allocation method of the PCS module group provided in the first aspect of the present embodiment.
From the above, according to the power distribution method and the related device of the PCS module group provided by the scheme of the application, the optimal efficiency interval of the PCS module group and the total charge/discharge required power value of the energy storage system under the current working condition are obtained; determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge required power value; and calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group. By implementing the scheme, based on the working execution state of the current energy storage system, the power parameters required to be output by the PCS module groups are calculated through the optimal efficiency interval tracking algorithm, all the PCS module groups are controlled to operate in the optimal efficiency interval, and the overall efficiency of the energy storage system is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings may be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a basic flowchart of a power distribution method of a PCS module group according to a first embodiment of the present application;
FIG. 2 is a graph of PCS efficiency provided by a first embodiment of the present application;
FIG. 3 is a flowchart of a power distribution method for a refined PCS module group according to a second embodiment of the present application;
FIG. 4 is a schematic program module diagram of a power distribution apparatus for a PCS module group according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of an energy storage system according to a fourth embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the embodiments of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
The first embodiment of the application provides a power distribution method of a PCS module group, which is applied to an energy storage system, wherein the energy storage system comprises the PCS module group. Fig. 1 is a basic flow chart of a power distribution method of a PCS module group according to the present embodiment, where the power distribution method of the PCS module group includes the following steps:
step 101, obtaining an optimal efficiency interval of the PCS module group and a total charge/discharge demand power value of the energy storage system under the current working condition.
Specifically, the energy storage system of the embodiment is configured with a PCS module group, the PCS module group includes a plurality of sub-PCS module groups, an ac side of the PCS module group in the energy storage system is connected with a power grid, and a dc side of the PCS module group is connected with an energy storage battery in the energy storage system; when the energy storage system is in a charging state, the PCS module is controlled to convert the alternating current into direct current. When the energy storage system is in a discharging state, the PCS module is controlled to convert direct current into alternating current; in the process of charging/discharging the energy storage battery by the energy storage system, the PCS module has energy loss, so that an optimal efficiency interval of the PCS module group under the current working condition and a total charging/discharging demand power value of the energy storage system are required to be obtained, and a power distribution parameter of the PCS module corresponding to each battery group in the PCS module group is calculated through an optimal efficiency interval tracking algorithm.
In one implementation manner of this embodiment, the step of obtaining the optimal efficiency interval of the PCS module group under the current working condition includes: acquiring the voltage level of a direct-current side energy storage battery in a current energy storage system; comparing the voltage level with a preset optimal efficiency interval determining table; the preset optimal efficiency interval determination table comprises a mapping relation between each voltage level and an optimal efficiency interval; and determining the optimal efficiency interval of the PCS module group under the current working condition according to the comparison result.
Specifically, since all the PCS modules included in the PCS module group are the same type of PCS module, that is, all the PCS modules in the PCS module group have the same PCS efficiency curve. Introducing the optimal load efficiency of the PCS module group into an EMS system, generating a PCS efficiency curve graph by the EMS system according to the optimal load efficiency of the introduced PCS module group, and after determining the voltage level of the current direct-current side energy storage battery, calling the PCS efficiency curve graph corresponding to the voltage level from the system, wherein FIG. 2 shows one PCS efficiency curve graph provided by the implementation, the abscissa of the efficiency curve is the load rate, the ordinate is the efficiency, and P in the graph 1 The load rate range corresponding to Pm is the optimal efficiency interval corresponding to the current load rate of the energy storage system. The optimal efficiency interval determining table is stored in the memory in advance, and the optimal efficiency interval of the PCS module group under the current working condition can be directly read out by comparing the voltage grade with the optimal efficiency interval determining table.
In one implementation manner of this embodiment, the step of obtaining the total charge/discharge required power value of the energy storage system under the current working condition includes: acquiring the alternating current load power of the current energy storage system, the allowed charging power of the alternating current side of the power grid in the energy storage system and the charging and discharging state information of the energy storage system; and determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the alternating current load power, the charging power allowed by the alternating current side of the power grid and the charge/discharge state information of the energy storage system.
Further, in an implementation manner of this embodiment, the charge and discharge state information of the energy storage system includes that the energy storage system is in a charge state and that the energy storage system is in a discharge state. The step of determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the ac load power, the charging power allowed by the ac side of the power grid and the charge/discharge state information of the energy storage system comprises the following steps: when the energy storage system is in a charging state, the alternating current load power and the charging power allowed by the alternating current side of the power grid are subjected to difference to obtain the total charging/discharging required power value of the energy storage system; when the energy storage system is in a discharging state, the alternating current load power is determined as the total charging/discharging required power value of the energy storage system.
Step 102, determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge demand power value.
In one implementation manner of this embodiment, the step of determining the target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge required power value includes: determining target efficiency characteristic parameters contained in an optimal efficiency interval based on the optimal load efficiency of the PCS module group; combining the target efficiency characteristic parameter and the total charge/discharge required power value, and calculating the number of target sub-PCS module groups in the PCS module group; and determining a target distribution mode of the PCS module group according to the number of the target sub-PCS module groups of the PCS module group.
Specifically, when the PCS module group performs power allocation, in order to ensure that all the PCS module groups work in an optimal efficiency interval, the number of target sub-PCS module groups in the PCS module group is first determined, that is, the number of sub-PCS module groups in the PCS module group, for which output power needs to be determined again, is determined. After the number of the target sub-PCS module groups is determined, the distribution mode of the PCS module groups can be determined, and the power distribution parameters calculated by different methods can be calculated by different distribution modes.
Further, in one implementation manner of this embodiment, the step of calculating the number of the target sub-PCS module groups in the PCS module group by combining the target efficiency characteristic parameter and the total charge/discharge demand power value includes: substituting the target efficiency characteristic parameter into a first calculation formula to calculate, wherein the first calculation formula is expressed as:
where n represents the number of target sub-PCS module groups to which power is to be allocated in the PCS module group,，/>respectively represents the rated power corresponding to each target sub PCS module group, < -> 、/>Representing the inclusion of the optimum efficiency intervalmIndividual target efficiency characteristic parameter->；/> 、/>Representing a calculation result of the first calculation formula; based on the calculation result of the first calculation formula and the total charge/discharge demand power value, +.>Is the minimum of (2)nDetermining the number of the target sub PCS module groups in the PCS module group or when +.>And->In the process, the number of the target sub PCS module groups in the PCS module group is determined to be 1, wherein ∈1>Indicating the total charge/discharge demand power value.
Specifically, the above、/>Representing the inclusion of the optimum efficiency intervalmThe characteristic parameters of the efficiency of the individual targets,，/>. The optimal load rate interval can be calculated by the first calculation formula. Use->Representing->In the actual calculation process:
from the slaveInitially, derive ∈>Rated power corresponding to target sub-PCS module group corresponding to time>And-> 、/>Substituting the first calculation formula together for calculation, and judging through the following corresponding relation after calculation:
pressing the buttonIn the calculation, deriving +.>Rated power corresponding to each PCS module group corresponding to the time>、/>And-> 、/>Substituting the first calculation formula together for calculation, and judging through the following corresponding relation after calculation:
pressing the buttonIn the calculation, deriving +.>Rated power corresponding to each corresponding target sub PCS module group>、/>、/>And-> 、/>Substituting the first calculation formula together for calculation, and judging through the following corresponding relation after calculation:
by pushing in this way until it is determined thatIs the minimum of (2)n。
Step 103, calculating the target power allocation parameters of the PCS module group according to the target allocation mode of the PCS module group.
In one implementation of this embodiment, the target allocation modes of the PCS module group include a single allocation mode and a multi-group allocation mode, and the target power allocation parameters of the PCS module group include power values to be output corresponding to each target sub-PCS module group in the PCS module group. The step of calculating the target power allocation parameter of the PCS module group according to the target allocation mode of the PCS module group includes: if the target allocation mode of the PCS module group is a single-component allocation mode, the number of target sub-PCS module groups to be allocated with power in the PCS module group is 1, and the target power allocation parameters of the target sub-PCS module groups to be allocated with power are calculated by a second calculation formula, wherein the second calculation formula is expressed as follows:
；
if the target allocation mode of the PCS module group is a multi-group allocation mode, the PCS module group comprises a plurality of target sub-PCS module groups, and target power allocation parameters corresponding to each target sub-PCS module group in the PCS module group are calculated respectively through a third calculation formula, wherein the third calculation formula is expressed as follows:
fAllocate_Grq n=fReq_Power*K n /(K 1 +K 2 +…K n )
wherein,fAllocate_Grq nrepresent the firstnAnd the target power distribution parameters corresponding to the target sub-PCS module groups.
Specifically, when the target allocation mode of the PCS module group is the single allocation mode, that isWhen in use, ifThen->The value output of (2) is +.>The method comprises the steps of carrying out a first treatment on the surface of the If it isThen->The value output of (2) is 0. If the target allocation mode of the PCS module group is a multi-group allocation mode, calculating target power allocation parameters corresponding to each target sub-PCS module group in the PCS module group according to a third calculation formula. And controlling each target sub PCS module group to output power according to the corresponding target power distribution parameters according to the calculation result.
Based on the technical scheme of the embodiment of the application, the optimal efficiency interval of the PCS module group and the total charge/discharge required power value of the energy storage system under the current working condition are obtained; determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge required power value; and calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group. By implementing the scheme, based on the working execution state of the current energy storage system, the power parameters required to be output by the PCS module groups are calculated through the optimal efficiency interval tracking algorithm, all the PCS module groups are controlled to operate in the optimal efficiency interval, and the overall efficiency of the energy storage system is improved.
The method in fig. 3 is a schematic flow chart of a power distribution method of a thinned PCS module group according to a second embodiment of the present application, where the power distribution method of the PCS module group includes:
step 301, obtaining a voltage level of a direct-current side energy storage battery in a current energy storage system.
Step 302, determining an optimal efficiency interval of the PCS module group under the current working condition according to the voltage level of the direct-current side energy storage battery in the current energy storage system.
Specifically, in this embodiment, different voltage levels correspond to different optimal efficiency intervals, and the voltage level of the current dc side energy storage battery is determined, so that the corresponding optimal efficiency interval can be found out from an optimal efficiency interval determination table including the mapping relationship between each voltage level and the optimal efficiency interval.
Step 303, determining a target efficiency characteristic parameter contained in the optimal efficiency interval based on the optimal load efficiency of the PCS module group.
Step 304, calculating the number of the target sub-PCS module groups in the PCS module group by combining the target efficiency characteristic parameter and the total charge/discharge required power value in the energy storage system.
Specifically, the total charge/discharge required power value in the energy storage system can be obtained by analyzing by combining the ac load power, the charging power allowed by the ac side of the power grid and the charge/discharge state information of the energy storage system. Substituting the target efficiency characteristic parameters into a formula I for calculation, comparing the calculation result with the total charge/discharge required power value in the energy storage system, and determining the number of target sub-PCS module groups in the PCS module group, namely determining how many sub-PCS module groups needing to redetermine the output probability exist in the PCS module group.
Step 305, determining a target allocation mode of the PCS module group according to the number of target sub-PCS module groups of the PCS module group.
Step 306, calculating a target power allocation parameter corresponding to the target sub-PCS module group in the PCS module group according to the target allocation mode of the PCS module group.
Specifically, the different allocation modes calculate the target power allocation parameters corresponding to the target sub-PCS module group according to different calculation formulas.
Step 307, controlling each target sub-PCS module group to output power according to the corresponding target power distribution parameters.
It should be understood that, the sequence number of each step in this embodiment does not mean the order of execution of the steps, and the execution order of each step should be determined by its functions and internal logic, and should not be construed as a unique limitation on the implementation process of the embodiments of the present application.
Through the technical scheme of the embodiment of the application, based on the working execution state of the current energy storage system, the optimal efficiency interval of the PCS module group is dynamically tracked, the sub PCS module group of which the output probability needs to be redetermined by the PCS module group, namely the target sub PCS module group, is found, and the power distribution parameters corresponding to each target sub PCS module group are calculated, so that all PCS modules in the energy storage system work in the optimal efficiency interval in real time, the operation efficiency of the PCS modules is improved to the greatest extent, and the overall efficiency of the energy storage system is improved.
Fig. 4 is a power distribution apparatus of a PCS module group according to a third embodiment of the present application. The power distribution device of the PCS module group can be applied to the power distribution method of the PCS module group. As shown in fig. 4, the power distribution apparatus of the PCS module group mainly includes:
401. the acquisition module is used for acquiring an optimal efficiency interval of the PCS module group and a total charge/discharge demand power value of the energy storage system under the current working condition, wherein the PCS module group comprises a plurality of sub PCS module groups.
402. And the determining module is used for combining the optimal efficiency interval and the total charge/discharge required power value to determine a target distribution mode of the PCS module group.
403. And the calculating module is used for calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group.
In some implementations of this embodiment, the acquiring module is specifically configured to, when executing the function of acquiring the optimal efficiency interval of the PCS module group under the current working condition: acquiring the voltage level of a direct-current side energy storage battery in a current energy storage system; comparing the voltage level with a preset optimal efficiency interval determining table; the preset optimal efficiency interval determination table comprises a mapping relation between each voltage level and an optimal efficiency interval; and determining the optimal efficiency interval of the PCS module group under the current working condition according to the comparison result.
In some implementations of this embodiment, the obtaining module is specifically configured to, when executing the function of obtaining the total charge/discharge demand power value of the energy storage system under the current working condition: acquiring the alternating current load power of the current energy storage system, the allowed charging power of the alternating current side of the power grid in the energy storage system and the charging and discharging state information of the energy storage system; and determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the alternating current load power, the charging power allowed by the alternating current side of the power grid and the charge/discharge state information of the energy storage system.
Further, in some implementations of this embodiment, the charge and discharge state information of the energy storage system includes that the energy storage system is in a charge state and the energy storage system is in a discharge state, and the obtaining module is specifically configured to, when executing the function of determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the ac load power, the allowed charge power of the ac side of the power grid, and the charge and discharge state information of the energy storage system, to: when the energy storage system is in a charging state, the alternating current load power and the charging power allowed by the alternating current side of the power grid are subjected to difference to obtain the total charging/discharging required power value of the energy storage system; when the energy storage system is in a discharging state, the alternating current load power is determined as the total charging/discharging required power value of the energy storage system.
In some implementations of this embodiment, the determining module is specifically configured to: determining target efficiency characteristic parameters contained in an optimal efficiency interval based on the optimal load efficiency of the PCS module group; calculating the number of target sub-PCS module groups in the PCS module group by combining the target efficiency characteristic parameter and the total charge/discharge required power value, wherein the target sub-PCS module group comprises a plurality of PCS modules; and determining a target distribution mode of the PCS module group according to the number of the target sub-PCS module groups of the PCS module group.
Further, in some implementations of the present embodiment, the determining module is specifically configured to, when executing the function of calculating the number of the target sub-PCS module groups in the PCS module group in combination with the target efficiency characteristic parameter and the total charge/discharge demand power value: substituting the target efficiency characteristic parameter into a first calculation formula to calculate, wherein the first calculation formula is expressed as:
where n represents the number of target sub-PCS module groups to which power is to be allocated in the PCS module group,，/>respectively represents the rated power corresponding to each target sub PCS module group, < ->、/>Representing the inclusion of the optimum efficiency intervalmIndividual target efficiency characteristic parameter->；/>、/>Representing a calculation result of the first calculation formula; based on the calculation result of the first calculation formula and the total charge/discharge demand power value, +.>Is the minimum of (2)nDetermining the number of the target sub PCS module groups in the PCS module group or when +.>And->In the process, the number of the target sub PCS module groups in the PCS module group is determined to be 1, wherein ∈1>Indicating the total charge/discharge demand power value.
Further, in some implementations of this embodiment, the target allocation modes of the PCS module group include a single allocation mode and a multi-group allocation mode, and the target power allocation parameters of the PCS module group include power values to be output corresponding to each target sub-PCS module group in the PCS module group. The computing module is specifically used for: if the target allocation mode of the PCS module group is a single-component allocation mode, the number of target sub-PCS module groups to be allocated with power in the PCS module group is 1, and the target power allocation parameters of the target sub-PCS module groups to be allocated with power are calculated by a second calculation formula, wherein the second calculation formula is expressed as follows:
；
if the target allocation mode of the PCS module group is a multi-group allocation mode, the PCS module group comprises a plurality of target sub-PCS module groups, and the target power allocation parameters corresponding to each target sub-PCS module group are respectively calculated through a third calculation formula, wherein the third calculation formula is expressed as follows:
fAllocate_Grq n=fReq_Power*K n /(K 1 +K 2 +…K n )
wherein,fAllocate_Grq nrepresent the firstnAnd the target power distribution parameters corresponding to the target sub-PCS module groups.
It should be noted that, the power distribution methods of the PCS module group in the first and second embodiments may be implemented based on the power distribution apparatus of the PCS module group provided in the first embodiment, and those skilled in the art can clearly understand that, for convenience and brevity of description, the specific working process of the power distribution apparatus of the PCS module group described in the present embodiment may refer to the corresponding process in the foregoing method embodiment, and will not be repeated herein.
According to the power distribution device of the PCS module group, the optimal efficiency interval of the PCS module group and the total charge/discharge required power value of the energy storage system under the current working condition are obtained; determining a target allocation mode of the PCS module group by combining the optimal efficiency interval and the total charge/discharge required power value; and calculating the target power distribution parameters of the PCS module group according to the target distribution mode of the PCS module group. By implementing the scheme, based on the working execution state of the current energy storage system, the power parameters required to be output by the PCS module groups are calculated through the optimal efficiency interval tracking algorithm, all the PCS module groups are controlled to operate in the optimal efficiency interval, and the overall efficiency of the energy storage system is improved.
Fig. 5 is a schematic diagram of an energy storage system according to a fourth embodiment of the present application. The energy storage system may be used to implement the power distribution method of the PCS module group in the foregoing embodiment, and mainly includes:
the PCS module group 501, the EMS controller 503 and the battery group 502, wherein the EMS controller 503 comprises a processor 504 and a memory 505.
A memory 505, a processor 504 and a computer program 506 stored on the memory 505 and executable on the processor 504, the memory 505 and the processor 504 being connected by communication. The processor 504, when executing the computer program 506, implements the method of the first or second embodiment. Wherein the number of processors may be one or more.
The memory 505 may be a high-speed random access memory (RAM, random Access Memory) memory or a non-volatile memory (non-volatile memory), such as a disk memory. The memory 505 is used for storing executable program code, and the processor 504 is coupled with the memory 505.
Further, the embodiment of the present application further provides a computer readable storage medium, which may be provided in the EMS controller, and the computer readable storage medium may be a memory in the embodiment shown in fig. 5.
The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the power distribution method for the PCS module group in the foregoing embodiment. Further, the computer-readable medium may be any medium capable of storing a program code, such as a usb (universal serial bus), a removable hard disk, a Read-Only Memory (ROM), a RAM, a magnetic disk, or an optical disk.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules is merely a logical function division, and there may be additional divisions of actual implementation, e.g., multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a readable storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application.
It should be noted that, for the sake of simplicity of description, the foregoing method embodiments are all expressed 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, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily all necessary for the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
The foregoing describes a power distribution method and related apparatus for a PCS module group provided in the present application, and those skilled in the art will recognize that there are variations in terms of the specific implementation and application range according to the concepts of the embodiments of the present application, and in summary, the present disclosure should not be construed as limiting the present application.
Claims (7)
1. The power distribution method of the PCS module group is characterized by being applied to an energy storage system, wherein the energy storage system comprises the PCS module group, and the power distribution method of the PCS module group comprises the following steps:
acquiring an optimal efficiency interval of the PCS module group and a total charge/discharge demand power value of the energy storage system under the current working condition; wherein the PCS module group comprises a plurality of sub PCS module groups;
determining target efficiency characteristic parameters contained in the optimal efficiency interval based on the optimal load efficiency of the PCS module group;
substituting the target efficiency characteristic parameter into a first calculation formula to calculate, wherein the first calculation formula is expressed as:
wherein n represents the number of target sub-PCS module groups to be allocated with power in the PCS module group,，/>respectively represents the rated power corresponding to each target sub PCS module group, < ->、/>Representing the inclusion of the optimal efficiency intervalmIndividual target efficiency characteristic parameter->；/>、/>Representing a calculation result of the first calculation formula;
based on the calculation result of the first calculation formula and the total charge/discharge demand power value, it will satisfyIs the minimum of (2)nDetermining the number of the target sub-PCS module groups in the PCS module group or, when +.>And->Determining the number of target sub-PCS module groups in the PCS module group as 1; wherein (1)>Representing a total charge demand power value/total discharge demand power value;
determining a target distribution mode of the PCS module group according to the number of target sub-PCS module groups to be distributed with power in the PCS module group; the PCS module group target distribution mode comprises a single distribution mode and a plurality of distribution modes, and the PCS module group target power distribution parameters comprise power values to be output corresponding to each target sub-PCS module group in the PCS module group;
if the target allocation mode of the PCS module group is a single allocation mode, the number of target sub-PCS module groups to be allocated with power in the PCS module group is 1, and calculating target power allocation parameters of the target sub-PCS module groups to be allocated with power according to a second calculation formula, where the second calculation formula is expressed as:
；
if the target allocation mode of the PCS module group is a multi-group allocation mode, the PCS module group includes a plurality of target sub-PCS module groups, and the target power allocation parameters corresponding to each target sub-PCS module group are calculated by a third calculation formula, where the third calculation formula is expressed as:
fAllocate_Grq n = fReq_Power*K n /(K 1 +K 2 +…K n )
wherein,fAllocate_Grq nrepresent the firstnAnd the target power distribution parameters corresponding to the target sub-PCS module groups.
2. The method for power distribution of a PCS module group according to claim 1, wherein the step of obtaining an optimal efficiency interval of the PCS module group under a current operating condition comprises:
acquiring the voltage level of a direct-current side energy storage battery in a current energy storage system;
comparing the voltage level with a preset optimal efficiency interval determining table; the preset optimal efficiency interval determination table comprises a mapping relation between each voltage level and an optimal efficiency interval;
and determining the optimal efficiency interval of the PCS module group under the current working condition according to the comparison result.
3. The method for power distribution of a PCS module group of claim 1, wherein the step of obtaining a total charge/discharge demand power value of the energy storage system under a current operating condition comprises:
acquiring current alternating current load power of the energy storage system, charging power allowed by an alternating current side of a power grid in the energy storage system and charging and discharging state information of the energy storage system;
and determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the alternating current load power, the charging power allowed by the alternating current side of the power grid and the charge/discharge state information of the energy storage system.
4. The method of power distribution for a PCS module group of claim 3, wherein the charge-discharge state information for the energy storage system includes the energy storage system being in a charged state and the energy storage system being in a discharged state;
the step of determining the total charge/discharge required power value of the energy storage system under the current working condition by combining the ac load power, the charging power allowed by the ac side of the power grid and the charge/discharge state information of the energy storage system comprises the following steps:
when the energy storage system is in a charging state, the alternating current load power and the charging power allowed by the alternating current side of the power grid are subjected to difference to obtain the total charging/discharging required power value of the energy storage system;
and when the energy storage system is in a discharging state, determining the alternating current load power as the total charging/discharging required power value of the energy storage system.
5. A power distribution device of a PCS module group, applied to an energy storage system, the energy storage system includes an energy storage battery and a PCS module group, the power distribution device of the PCS module group includes:
the acquisition module is used for acquiring an optimal efficiency interval of the PCS module group and a total charge/discharge required power value of the energy storage system under the current working condition, wherein the PCS module group comprises a plurality of sub PCS module groups;
the determining module is used for determining target efficiency characteristic parameters contained in the optimal efficiency interval based on the optimal load efficiency of the PCS module group; substituting the target efficiency characteristic parameter into a first calculation formula to calculate, wherein the first calculation formula is expressed as:
wherein n represents the number of target sub-PCS module groups to be allocated with power in the PCS module group,，/>respectively represents the rated power corresponding to each target sub PCS module group, < ->、/>Representing the inclusion of the optimal efficiency intervalmIndividual target efficiency characteristic parameter->；/>、/>Representing a calculation result of the first calculation formula;
based on the calculation result of the first calculation formula and the total charge/discharge demand power value, it will satisfyIs the minimum of (2)nDetermining the number of the target sub-PCS module groups in the PCS module group or, when +.>And->Determining the number of target sub-PCS module groups in the PCS module group as 1; wherein (1)>Representing a total charge demand power value/total discharge demand power value; determining a target distribution mode of the PCS module group according to the number of target sub-PCS module groups to be distributed with power in the PCS module group; the PCS module group target distribution mode comprises a single distribution mode and a plurality of distribution modes, and the PCS module group target power distribution parameters comprise power values to be output corresponding to each target sub-PCS module group in the PCS module group;
the calculation module is configured to calculate, if the target allocation mode of the PCS module group is a single-component allocation mode, a target power allocation parameter of the target sub-PCS module group to be allocated with power in the PCS module group by using a second calculation formula, where the second calculation formula is expressed as:
；
the calculation module is further configured to, if the target allocation mode of the PCS module group is a multi-group allocation mode, calculate, by using a third calculation formula, a target power allocation parameter corresponding to each target sub-PCS module group, where the third calculation formula is expressed as:
fAllocate_Grq n = fReq_Power*K n /(K 1 +K 2 +…K n )
wherein,fAllocate_Grq nrepresent the firstnAnd the target power distribution parameters corresponding to the target sub-PCS module groups.
6. An energy storage system, characterized by comprising a PCS module group, an EMS controller and a battery group, wherein:
the EMS controller comprises a memory and a processor;
the processor is used for executing the computer program stored on the memory;
the processor, when executing the computer program, implements the steps of the method of any one of claims 1 to 4.
7. A computer readable storage medium having stored thereon a computer program, which when executed by a processor in an EMS controller, implements the steps of the method of any of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211403727.5A CN115940221B (en) | 2022-11-10 | 2022-11-10 | Power distribution method and related device of PCS module group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211403727.5A CN115940221B (en) | 2022-11-10 | 2022-11-10 | Power distribution method and related device of PCS module group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115940221A CN115940221A (en) | 2023-04-07 |
| CN115940221B true CN115940221B (en) | 2024-02-23 |
Family
ID=86651843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211403727.5A Active CN115940221B (en) | 2022-11-10 | 2022-11-10 | Power distribution method and related device of PCS module group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115940221B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799829A (en) * | 2023-08-22 | 2023-09-22 | 北京国能国源能源科技有限公司 | PCS-based energy storage control system for load optimization adjustment |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336766A (en) * | 2018-02-13 | 2018-07-27 | 中国电力科学研究院有限公司 | A kind of energy-storage system multiple agent cooperative control method and device |
| CN110224422A (en) * | 2019-06-19 | 2019-09-10 | 合肥阳光新能源科技有限公司 | Method for balancing powers, Energy Management System and the coordination management system of energy-storage system |
| CN111555321A (en) * | 2020-04-20 | 2020-08-18 | 上海豫源电力科技有限公司 | Power distribution method and device of PCS (Power conversion System) in energy storage combined thermal power frequency modulation |
| CN111740437A (en) * | 2020-05-09 | 2020-10-02 | 深圳英飞源技术有限公司 | Management method, device and circuit of energy storage system, electronic equipment and storage medium |
| CN111756058A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Energy storage system charge-discharge power distribution method |
| CN112821416A (en) * | 2020-12-31 | 2021-05-18 | 上海申能新动力储能研发有限公司 | Fire storage combined frequency modulation energy storage power distribution method |
| WO2021129422A1 (en) * | 2019-12-23 | 2021-07-01 | 至玥腾风科技集团有限公司 | Power distribution method and distribution system |
| CN113922382A (en) * | 2021-09-30 | 2022-01-11 | 广东电网有限责任公司 | Voltage regulation and control method, device and equipment for user-side adjustable energy storage and storage medium |
| CN114123280A (en) * | 2021-11-26 | 2022-03-01 | 国网甘肃省电力公司电力科学研究院 | Battery energy storage power station energy management method considering system efficiency |
| CN114498824A (en) * | 2022-01-12 | 2022-05-13 | 国能信控互联技术有限公司 | Charging and discharging power balance distribution method and system for sustainable energy storage battery |
| CN114765371A (en) * | 2022-06-16 | 2022-07-19 | 中国华能集团清洁能源技术研究院有限公司 | Power control method and device of multi-branch energy storage system |
| CN114914932A (en) * | 2022-04-27 | 2022-08-16 | 国家电投集团江苏电力有限公司 | Direct-current access type distributed energy storage system based on direct-drive fan |
-
2022
- 2022-11-10 CN CN202211403727.5A patent/CN115940221B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336766A (en) * | 2018-02-13 | 2018-07-27 | 中国电力科学研究院有限公司 | A kind of energy-storage system multiple agent cooperative control method and device |
| CN111756058A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Energy storage system charge-discharge power distribution method |
| CN110224422A (en) * | 2019-06-19 | 2019-09-10 | 合肥阳光新能源科技有限公司 | Method for balancing powers, Energy Management System and the coordination management system of energy-storage system |
| WO2021129422A1 (en) * | 2019-12-23 | 2021-07-01 | 至玥腾风科技集团有限公司 | Power distribution method and distribution system |
| CN111555321A (en) * | 2020-04-20 | 2020-08-18 | 上海豫源电力科技有限公司 | Power distribution method and device of PCS (Power conversion System) in energy storage combined thermal power frequency modulation |
| CN111740437A (en) * | 2020-05-09 | 2020-10-02 | 深圳英飞源技术有限公司 | Management method, device and circuit of energy storage system, electronic equipment and storage medium |
| CN112821416A (en) * | 2020-12-31 | 2021-05-18 | 上海申能新动力储能研发有限公司 | Fire storage combined frequency modulation energy storage power distribution method |
| CN113922382A (en) * | 2021-09-30 | 2022-01-11 | 广东电网有限责任公司 | Voltage regulation and control method, device and equipment for user-side adjustable energy storage and storage medium |
| CN114123280A (en) * | 2021-11-26 | 2022-03-01 | 国网甘肃省电力公司电力科学研究院 | Battery energy storage power station energy management method considering system efficiency |
| CN114498824A (en) * | 2022-01-12 | 2022-05-13 | 国能信控互联技术有限公司 | Charging and discharging power balance distribution method and system for sustainable energy storage battery |
| CN114914932A (en) * | 2022-04-27 | 2022-08-16 | 国家电投集团江苏电力有限公司 | Direct-current access type distributed energy storage system based on direct-drive fan |
| CN114765371A (en) * | 2022-06-16 | 2022-07-19 | 中国华能集团清洁能源技术研究院有限公司 | Power control method and device of multi-branch energy storage system |
Non-Patent Citations (2)
| Title |
|---|
| 一体化电站并联功率变换系统多模式运行统一控制策略;蔡久青;陈昌松;段善旭;刘朋;;电工技术学报(第10期);92-100 * |
| 考虑电池能效的电网侧电化学储能电站最优功率控制策略研究;冯力勇;张云;;华电技术(第04期);43-47 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115940221A (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115940221B (en) | Power distribution method and related device of PCS module group | |
| WO2015099138A1 (en) | Temperature control apparatus for electricity storage device | |
| CN106026327A (en) | Charging device, charging method, power adapter and terminal | |
| JP2021513315A (en) | Energy internet system, energy routing converter and energy control method | |
| WO2021237135A1 (en) | Systems and methods for impedance measurement of a battery cell | |
| KR101759819B1 (en) | Storage battery control device and storage battery control method | |
| JP5636267B2 (en) | DC power supply device, electric vehicle charging device, DC power supply unit parallel operation method, and electric vehicle charging current control method | |
| CN111376778B (en) | Charging pile control method and device, computer equipment and storage medium | |
| CN106788076B (en) | A kind of balance car control method, apparatus and system | |
| EP4336695A1 (en) | Energy storage system, energy storage converter, and optimization method for primary frequency modulation | |
| CN111987719B (en) | Method and device for bidding electric vehicle aggregator to participate in frequency modulation | |
| CN112467768A (en) | Scheduling method and device of battery pack | |
| CN116896104A (en) | Combined clearing method and system for counting state-of-charge electric energy and frequency modulation market | |
| CN109088441B (en) | Power electronic transformer parallel operation optimal load power distribution calculation method and device | |
| CN117155103B (en) | Inverter power control method and related equipment thereof | |
| CN115238992B (en) | Coordination optimization method and device for power system source load storage and electronic equipment | |
| CN116845907A (en) | Micro-grid source load scheduling method, micro-grid source load scheduling system, electronic equipment and medium | |
| CN115912500A (en) | Operation control method, device, control equipment and system for micro-grid system | |
| JP2021069192A (en) | Power conditioner | |
| CN109787350A (en) | Storage of avoiding the peak hour lighting power supply system | |
| JP5964080B2 (en) | Output smoothing apparatus, output smoothing method and program | |
| CN113629764A (en) | Charge-discharge control method and application device thereof | |
| KR20210010753A (en) | Hybrid renewable energy system using dc common type | |
| JPWO2014133123A1 (en) | Power system, power management method, and program | |
| CN217335143U (en) | Heavy industry inversion system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |