A method for determining an energy storage aggregate participating in grid regulation and a storage medium

Abstract

The present application relates to a kind of participating in the determination method of energy storage aggregate of grid regulation and storage medium, the method comprises: obtaining target area in grid regulation instruction, the operating parameter of each energy storage system and the corresponding alternative energy storage aggregate set of target area;According to the operating parameter of each energy storage system in the target area, determine the regulation index of each energy storage aggregate in the alternative energy storage aggregate set;Based on the regulation instruction in the target area and the regulation index of each aggregate in the alternative energy storage aggregate set, determine the energy storage aggregate participating in the grid regulation under the grid regulation instruction.The technical scheme provided by the present application not only improves the regulation ability of energy storage, but also can respond to short or ultra-short power system power fluctuation.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage polymer determination, and in particular to a method for determining an energy storage polymer participating in power grid regulation and a storage medium. Background Art

[0002] Modern power systems utilize extensive energy storage systems on the generation, grid, and load sides. These energy storage systems are designed to balance grid power fluctuations at various points in the system. Specifically, these include long-term peak regulation, short- to medium-term frequency regulation, and ultra-short-term fluctuation mitigation for renewable energy sources. However, due to ownership and operational rights issues, as well as spatial separation, effective operational coordination between these different energy storage systems is difficult. This prevents the full utilization of storage's long-, medium-, and short-term charging and discharging resources for efficient power system regulation.

[0003] Currently, because energy storage systems at different grid nodes are independently constructed and have different ownership and operating rights, each storage system can only operate independently and respond to grid dispatch instructions. From the grid dispatch side, faced with a large number of centralized and distributed energy storage systems, an empirical dispatch method is often used, prioritizing large centralized energy storage systems while autonomously determining operational strategies for smaller or distributed energy storage systems. This technical solution can meet the basic needs of power system peak and frequency regulation, but it wastes a significant amount of energy storage regulation capacity and resources, and is unable to respond to short-term or ultra-short-term power system power fluctuations. Summary of the Invention

[0004] The present application provides a method for determining an energy storage aggregate participating in grid regulation and a storage medium to at least solve the technical problems in related technologies of wasting a large amount of energy storage regulation capabilities and resources and being unable to respond to short-term or ultra-short-term power fluctuations in the power system.

[0005] A first embodiment of the present application provides a method for determining an energy storage aggregate participating in grid regulation, the method comprising:

[0006] Obtaining grid regulation instructions, operating parameters of each energy storage system, and a set of candidate energy storage aggregates corresponding to the target area within the target area;

[0007] Determining an adjustment index of each energy storage polymer in the set of candidate energy storage polymers according to the operating parameters of each energy storage system in the target area;

[0008] Based on the grid regulation instruction in the target area and the regulation index of each aggregate in the set of candidate energy storage aggregates, the energy storage aggregate participating in the grid regulation under the grid regulation instruction is determined.

[0009] Preferably, the process of obtaining the set of candidate energy storage polymers corresponding to the target area includes:

[0010] Combining the energy storage systems in the target area using an exhaustive combination method to obtain candidate energy storage aggregates;

[0011] A set of candidate energy storage polymers corresponding to the target area is formed based on the candidate energy storage polymers.

[0012] Preferably, the operating parameters of each energy storage system in the target area include: maximum charge and discharge power, capacity, SOC value and power ramp rate of each energy storage system;

[0013] The regulation indicators of each energy storage polymer include: a peak regulation indicator, a frequency regulation indicator and a rapid fluctuation suppression indicator.

[0014] Furthermore, the peak load index of each energy storage polymer is calculated as follows:

[0015]

[0016] The calculation formula of the frequency modulation index of each energy storage polymer is as follows:

[0017]

[0018] The calculation formula of the rapid fluctuation suppression index of each energy storage polymer is as follows:

[0019]

[0020] Where S tf,i is the peak load index value of the i-th energy storage aggregate in the set of candidate energy storage aggregates, S tp,i is the frequency modulation index value of the i-th energy storage polymer in the set of candidate energy storage polymers, S bd,i is the rapid fluctuation suppression index value of the i-th energy storage polymer in the set of candidate energy storage polymers, SOC j is the remaining capacity (State of Capacity, SOC) of the j-th energy storage system, c j is the capacity of the j-th energy storage system, C i is the sum of the capacities of the energy storage systems in the i-th energy storage aggregate, j∈[1~l], l is the number of energy storage systems in the i-th energy storage aggregate, i∈[1~m], m is the number of energy storage aggregates in the set of alternative energy storage aggregates, P max,i is the sum of the maximum charge and discharge powers of each energy storage system in the i-th energy storage aggregate, p max,j is the maximum charge and discharge power of the j-th energy storage system, is the average power ramp rate of each energy storage system in the i-th energy storage aggregate, k j is the power ramp rate of the jth energy storage system, d j is the connection impedance between the j-th energy storage system and the renewable energy power station that needs to perform rapid fluctuation suppression.

[0021] Furthermore, the power grid regulation instructions in the target area include: peak regulation instructions, frequency regulation instructions and fluctuation suppression instructions.

[0022] Furthermore, the determining of the energy storage aggregates participating in grid regulation under the grid regulation instruction based on the grid regulation instruction in the target area and the regulation index of each aggregate in the set of candidate energy storage aggregates includes:

[0023] Determine the maximum charge and discharge power range of the peak-shaving energy storage polymer and the maximum charge and discharge power range of the frequency-modulation energy storage polymer according to the peak-shaving instruction and the frequency-modulation instruction in the grid regulation instruction;

[0024] Determining energy storage polymers participating in grid peak shaving and energy storage polymers participating in grid frequency regulation based on the maximum charge and discharge power range of the peak shaving energy storage polymer and the maximum charge and discharge power range of the frequency regulation energy storage polymer;

[0025] An energy storage aggregate for suppressing fluctuations is determined based on the energy storage aggregates participating in grid peak regulation, the energy storage aggregates participating in grid frequency regulation, and the set of candidate energy storage aggregates.

[0026] Furthermore, the determining of the energy storage aggregate for suppressing fluctuations based on the energy storage aggregates participating in grid peak regulation, the energy storage aggregates participating in grid frequency regulation, and the set of candidate energy storage aggregates includes:

[0027] Screening out, from the set of candidate energy storage aggregates, aggregates whose intersection with the energy storage aggregates participating in grid peak regulation and the energy storage aggregates participating in grid frequency regulation is empty;

[0028] The energy storage polymer corresponding to the maximum value of the rapid fluctuation suppression index among the screened energy storage polymers is used as the energy storage polymer for suppressing fluctuation.

[0029] Furthermore, the maximum charge and discharge power range of the peak-shaving energy storage polymer to be selected is greater than or equal to 0.9P tf And less than or equal to 1.1P tf ;

[0030] The maximum charge and discharge power range of the frequency modulation energy storage polymer to be selected is greater than or equal to 0.9P tp And less than or equal to 1.1P tp ;

[0031] Among them, P tf is the peak load instruction value in the power grid regulation instruction, P tf It is the frequency regulation command value in the power grid regulation command.

[0032] Furthermore, the determining of the energy storage aggregates participating in grid peak shaving and the energy storage aggregates participating in grid frequency regulation based on the maximum charge and discharge power range of the peak shaving energy storage aggregate and the maximum charge and discharge power range of the frequency regulation energy storage aggregate includes:

[0033] Screening out energy storage polymers that meet the maximum charge and discharge power range of the peak-shaving energy storage polymer from the set of candidate energy storage polymers, and using the energy storage polymer corresponding to the maximum value of the peak-shaving index among the screened energy storage polymers as the energy storage polymer participating in the peak-shaving of the power grid;

[0034] Energy storage polymers that meet the maximum charge and discharge power range of the frequency modulation energy storage polymer are screened out from the set of candidate energy storage polymers, and the energy storage polymer corresponding to the maximum value of the frequency modulation index among the screened energy storage polymers is used as the energy storage polymer participating in the grid frequency modulation.

[0035] The second embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the prediction method of the first aspect of the present application is implemented.

[0036] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0037] The present invention provides a method and storage medium for determining energy storage aggregates that participate in grid regulation, the method comprising: obtaining grid regulation instructions, operating parameters of each energy storage system, and a set of alternative energy storage aggregates corresponding to the target area within a target area; determining the regulation index of each energy storage aggregate in the set of alternative energy storage aggregates based on the operating parameters of each energy storage system in the target area; and determining the energy storage aggregates that participate in grid regulation under the grid regulation instruction based on the grid regulation instructions and the regulation index of each aggregate in the set of alternative energy storage aggregates. The technical solution provided by the present invention not only improves the regulation capability of energy storage, but can also respond to short-term or ultra-short-term power fluctuations in the power system. Additional aspects and advantages of the present application will be partially given in the following description, and partially will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0039] Figure 1is a flow chart of a method for determining an energy storage aggregate participating in grid regulation according to one embodiment of the present application;

[0040] Figure 2 This is a flowchart for determining the energy storage aggregates participating in grid regulation under the grid regulation instruction provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0042] The present application proposes a method for determining energy storage aggregates that participate in grid regulation and a storage medium, the method comprising: obtaining grid regulation instructions, operating parameters of each energy storage system, and a set of alternative energy storage aggregates corresponding to the target area within a target area; determining the regulation index of each energy storage aggregate in the set of alternative energy storage aggregates according to the operating parameters of each energy storage system in the target area; and determining the energy storage aggregates that participate in grid regulation under the grid regulation instruction based on the grid regulation instructions and the regulation index of each aggregate in the set of alternative energy storage aggregates. The technical solution provided by the present invention not only improves the regulation capability of energy storage, but can also respond to short-term or ultra-short-term power fluctuations in the power system. Additional aspects and advantages of the present application will be partially given in the following description, and partially will become apparent from the following description, or will be understood through the practice of the present application.

[0043] The following describes a method for determining an energy storage aggregate participating in grid regulation and a storage medium according to an embodiment of the present application with reference to the accompanying drawings.

[0044] Example 1

[0045] Figure 1 A flow chart of a method for determining an energy storage aggregate participating in grid regulation provided in an embodiment of the present disclosure, such as Figure 1 Said method comprises:

[0046] Step 1: Obtaining grid regulation instructions, operating parameters of each energy storage system, and a set of candidate energy storage aggregates corresponding to the target area;

[0047] The process of obtaining the set of candidate energy storage polymers corresponding to the target area includes:

[0048] Combining the energy storage systems in the target area using an exhaustive combination method to obtain candidate energy storage aggregates;

[0049] A set of candidate energy storage polymers corresponding to the target area is formed based on the candidate energy storage polymers.

[0050] For example, if there are n energy storage systems, then the exhaustive combination method can be used to obtain m elements in the set of candidate energy storage polymers, namely

[0051] Step 2: determining the adjustment index of each energy storage polymer in the set of candidate energy storage polymers according to the operating parameters of each energy storage system in the target area;

[0052] It should be noted that the operating parameters of each energy storage system in the target area include: the maximum charge and discharge power, capacity, SOC value and power ramp rate of each energy storage system;

[0053] The regulation indicators of each energy storage polymer include: a peak regulation indicator, a frequency regulation indicator and a rapid fluctuation suppression indicator.

[0054] Specifically, the peak load index of each energy storage polymer is calculated as follows:

[0055]

[0056] The calculation formula of the frequency modulation index of each energy storage polymer is as follows:

[0057]

[0058] The calculation formula of the rapid fluctuation suppression index of each energy storage polymer is as follows:

[0059]

[0060] Where S tf,i is the peak load index value of the i-th energy storage aggregate in the set of candidate energy storage aggregates, S tp,i is the frequency modulation index value of the i-th energy storage polymer in the set of candidate energy storage polymers, S bd,i is the rapid fluctuation suppression index value of the i-th energy storage polymer in the set of candidate energy storage polymers, SOC j is the SOC value of the j-th energy storage system, c j is the capacity of the j-th energy storage system, C i is the sum of the capacities of the energy storage systems in the i-th energy storage aggregate, j∈[1~l], l is the number of energy storage systems in the i-th energy storage aggregate, i∈[1~m], m is the number of energy storage aggregates in the set of alternative energy storage aggregates, P max,i is the sum of the maximum charge and discharge powers of each energy storage system in the i-th energy storage aggregate, p max,jis the maximum charge and discharge power of the j-th energy storage system, is the average power ramp rate of each energy storage system in the i-th energy storage aggregate, k j is the power ramp rate of the jth energy storage system, d j is the connection impedance between the j-th energy storage system and the renewable energy power station that needs to perform rapid fluctuation suppression.

[0061] It should be noted that the connection impedance between the energy storage system and the renewable energy power station that needs to perform rapid fluctuation suppression is determined based on the site location of the renewable energy power station that needs to perform rapid fluctuation suppression.

[0062] Step 3: Determine the energy storage aggregates that participate in grid regulation under the grid regulation instruction based on the grid regulation instruction in the target area and the regulation index of each aggregate in the set of candidate energy storage aggregates.

[0063] It should be noted that the power grid regulation instructions in the target area include: peak regulation instructions, frequency regulation instructions and fluctuation suppression instructions.

[0064] In the embodiment of the present disclosure, Figure 2 As shown, the step 3 specifically includes:

[0065] Step 3-1: Determine the maximum charge and discharge power range of the peak-shaving energy storage polymer and the maximum charge and discharge power range of the frequency-modulation energy storage polymer according to the peak-shaving instruction and the frequency-modulation instruction in the grid regulation instruction;

[0066] The maximum charge and discharge power range of the peak-shaving energy storage polymer to be selected is greater than or equal to 0.9P tf And less than or equal to 1.1P tf ;

[0067] The maximum charge and discharge power range of the frequency modulation energy storage polymer to be selected is greater than or equal to 0.9P tp And less than or equal to 1.1P tp Among them, P tf is the peak load instruction value in the power grid regulation instruction, P tf It is the frequency regulation command value in the power grid regulation command.

[0068] Step 3-2: Determine the energy storage polymers participating in grid peak shaving and the energy storage polymers participating in grid frequency regulation based on the maximum charge and discharge power range of the peak shaving energy storage polymer and the maximum charge and discharge power range of the frequency regulation energy storage polymer;

[0069] Furthermore, the step 3-2 includes:

[0070] Step 3-2-1: Screening out energy storage polymers that meet the maximum charge and discharge power range of the peak-shaving energy storage polymer from the set of candidate energy storage polymers, and using the energy storage polymer corresponding to the maximum value of the peak-shaving index among the screened energy storage polymers as the energy storage polymer participating in the peak-shaving of the power grid;

[0071] Step 3-2-2: Filter out energy storage polymers that meet the maximum charge and discharge power range of the frequency modulation energy storage polymer from the set of alternative energy storage polymers, and use the energy storage polymer corresponding to the maximum value of the frequency modulation index among the filtered energy storage polymers as the energy storage polymer participating in the grid frequency modulation.

[0072] It should be noted that the intersection of the screened energy storage polymers that meet the maximum charge and discharge power range of the frequency modulation energy storage polymer and the screened energy storage polymers that meet the maximum charge and discharge power range of the peak regulation energy storage polymer is empty.

[0073] Step 3-3: Determine an energy storage aggregate for suppressing fluctuations based on the energy storage aggregates participating in grid peak regulation, the energy storage aggregates participating in grid frequency regulation, and the set of candidate energy storage aggregates.

[0074] Furthermore, the step 3-3 includes:

[0075] Step 3-3-1: Filter out, from the set of candidate energy storage aggregates, aggregates whose intersection with the energy storage aggregates participating in grid peak regulation and the energy storage aggregates participating in grid frequency regulation is empty;

[0076] Step 3-3-2: The energy storage polymer corresponding to the maximum value of the rapid fluctuation suppression index among the screened energy storage polymers is used as the energy storage polymer for suppressing fluctuations.

[0077] In summary, the method for determining energy storage aggregates participating in grid regulation provided by the embodiments of the present disclosure not only improves the regulation capability of energy storage, but also can respond to short-term or ultra-short-term power fluctuations in the power system.

[0078] Example 2

[0079] In order to implement the above embodiments, the present disclosure also proposes a computer-readable storage medium.

[0080] The computer device provided in this embodiment stores a computer program, which implements the method in Example 1 when executed by a processor.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0082] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0083] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for determining an energy storage aggregate participating in grid regulation, characterized in that: The method comprises: Obtaining grid regulation instructions, operating parameters of each energy storage system, and a set of candidate energy storage aggregates corresponding to the target area within the target area; Determining an adjustment index of each energy storage polymer in the set of candidate energy storage polymers according to the operating parameters of each energy storage system in the target area; Determining an energy storage aggregate that participates in grid regulation under the grid regulation instruction based on the grid regulation instruction in the target area and the regulation index of each aggregate in the set of candidate energy storage aggregates; The operating parameters of each energy storage system in the target area include: the maximum charge and discharge power, capacity, SOC value and power ramp rate of each energy storage system; The regulation indicators of each energy storage polymer include: peak regulation index, frequency regulation index and rapid fluctuation suppression index; The determining of the energy storage aggregates participating in grid regulation under the grid regulation instruction based on the grid regulation instruction in the target area and the regulation index of each aggregate in the set of candidate energy storage aggregates includes: Determine the maximum charge and discharge power range of the peak-shaving energy storage polymer and the maximum charge and discharge power range of the frequency-modulation energy storage polymer according to the peak-shaving instruction and the frequency-modulation instruction in the grid regulation instruction; Determining energy storage polymers participating in grid peak shaving and energy storage polymers participating in grid frequency regulation based on the maximum charge and discharge power range of the peak shaving energy storage polymer and the maximum charge and discharge power range of the frequency regulation energy storage polymer; Determine an energy storage aggregate for suppressing fluctuations according to the energy storage aggregates participating in grid peak regulation, the energy storage aggregates participating in grid frequency regulation, and the set of candidate energy storage aggregates; The calculation formula of the peak load index of each energy storage polymer is as follows: The calculation formula of the frequency modulation index of each energy storage polymer is as follows: The calculation formula of the rapid fluctuation suppression index of each energy storage polymer is as follows: Where, is the peak load index value of the i-th energy storage aggregate in the set of candidate energy storage aggregates, is the frequency modulation index value of the i-th energy storage polymer in the set of candidate energy storage polymers, is the rapid fluctuation suppression index value of the i-th energy storage polymer in the set of candidate energy storage polymers, , is the SOC value of the j-th energy storage system, is the capacity of the j-th energy storage system, , is the sum of the capacities of the energy storage systems in the i-th energy storage aggregate, , is the number of energy storage systems in the i-th energy storage aggregate, , is the number of energy storage polymers in the set of candidate energy storage polymers, , is the sum of the maximum charge and discharge powers of each energy storage system in the i-th energy storage aggregate, is the maximum charge and discharge power of the j-th energy storage system, , is the average power ramp rate of each energy storage system in the i-th energy storage aggregate, is the power ramp rate of the j-th energy storage system, is the connection impedance between the j-th energy storage system and the renewable energy power station that needs to perform rapid fluctuation suppression.

2. The method according to claim 1, wherein The process of obtaining the set of candidate energy storage polymers corresponding to the target area includes: Combining the energy storage systems in the target area using an exhaustive combination method to obtain candidate energy storage aggregates; A set of candidate energy storage polymers corresponding to the target area is formed based on the candidate energy storage polymers.

3. The method according to claim 1, wherein The power grid regulation instructions in the target area include: peak regulation instructions, frequency regulation instructions and fluctuation suppression instructions.

4. The method according to claim 1, wherein The determining of the energy storage aggregate for suppressing fluctuations based on the energy storage aggregates participating in grid peak regulation, the energy storage aggregates participating in grid frequency regulation, and the set of candidate energy storage aggregates includes: Screening out, from the set of candidate energy storage aggregates, aggregates whose intersection with the energy storage aggregates participating in grid peak regulation and the energy storage aggregates participating in grid frequency regulation is empty; The energy storage polymer corresponding to the maximum value of the rapid fluctuation suppression index among the screened energy storage polymers is used as the energy storage polymer for suppressing fluctuation.

5. The method according to claim 1, wherein The maximum charge and discharge power range of the peak-shaving energy storage polymer to be selected is greater than or equal to 0.9 and less than or equal to 1.1 ; The maximum charge and discharge power range of the frequency modulation energy storage polymer to be selected is greater than or equal to 0.9 and less than or equal to 1.1 ; in, is the peak load instruction value in the power grid regulation instruction, It is the frequency regulation command value in the power grid regulation command.

6. The method according to claim 5, wherein The determining of the energy storage polymers participating in grid peak shaving and the energy storage polymers participating in grid frequency regulation based on the maximum charge and discharge power range of the peak shaving energy storage polymer and the maximum charge and discharge power range of the frequency regulation energy storage polymer includes: Screening out energy storage polymers that meet the maximum charge and discharge power range of the peak-shaving energy storage polymer from the set of candidate energy storage polymers, and using the energy storage polymer corresponding to the maximum value of the peak-shaving index among the screened energy storage polymers as the energy storage polymer participating in the peak-shaving of the power grid; Energy storage polymers that meet the maximum charge and discharge power range of the frequency modulation energy storage polymer are screened out from the set of candidate energy storage polymers, and the energy storage polymer corresponding to the maximum value of the frequency modulation index among the screened energy storage polymers is used as the energy storage polymer participating in the grid frequency modulation.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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