Energy storage planning method and related device

Abstract

The invention discloses an energy storage planning method and a related device. The method comprises the following steps: determining a first energy storage planning result of a main network side; determining a second energy storage planning result of the distribution network side; the first energy storage planning result comprises a first energy storage charging and discharging power curve of each target transformer substation, the second energy storage planning result comprises a plurality of second energy storage charging and discharging power curves of each target transformer substation, and the target transformer substations are transformer substations located at the voltage grade boundary of the main network side and the distribution network side; adjusting the first energy storage charging and discharging power curve according to the plurality of second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve; updating the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; and obtaining a target energy storage planning result according to the third energy storage planning result and the second energy storage planning result. The stability of the power grid can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of power system planning, and in particular to an energy storage planning method and related devices. Background Art

[0002] At present, with the large-scale access of new energy sources, the volatility and uncertainty of the power system have increased, which can easily lead to power imbalance, power mismatch and difficulty in absorbing renewable energy, thus affecting the stability of the power grid. Summary of the invention

[0003] The embodiments of the present application provide an energy storage planning method and related devices to improve the stability of a power grid.

[0004] In a first aspect, an embodiment of the present application provides an energy storage planning method, which is applied to an energy storage planning system, including:

[0005] Determine a first energy storage planning result on the main grid side; and determine a second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes a plurality of second energy storage charging and discharging power curves of each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side;

[0006] Adjusting the first energy storage charge and discharge power curve according to the plurality of second energy storage charge and discharge power curves to obtain a third energy storage charge and discharge power curve;

[0007] Update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result;

[0008] A target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result.

[0009] In a second aspect, an embodiment of the present application provides an energy storage planning device, which is applied to an energy storage planning system, including:

[0010] A determination unit, used to determine a first energy storage planning result on the main grid side; and to determine a second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes a plurality of second energy storage charging and discharging power curves of each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side;

[0011] an adjusting unit, configured to adjust the first energy storage charging and discharging power curve according to the plurality of second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve;

[0012] An updating unit, configured to update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result;

[0013] A processing unit is used to obtain a target energy storage planning result according to the third energy storage planning result and the second energy storage planning result.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, comprising a processor and a memory storing execution instructions, wherein the memory stores one or more programs; when the processor executes the execution instructions stored in the memory, the processor executes the method described in the first aspect.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing an energy data management program, including execution instructions. When a processor of an electronic device executes the execution instructions, the processor executes the method described in the first aspect.

[0016] In a fifth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the first aspect of the embodiment of the present application. The computer program product may be a software installation package.

[0017] It can be seen that in the embodiment of the present application, the first energy storage planning result on the main grid side is first determined; and the second energy storage planning result on the distribution grid side is determined; the first energy storage planning result includes a first energy storage charging and discharging power curve for each target substation, and the second energy storage planning result includes multiple second energy storage charging and discharging power curves for each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side; then the first energy storage charging and discharging power curve is adjusted according to the multiple second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve; then the first energy storage planning result is updated according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; finally, the target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result. The present application performs energy storage planning on the main grid side and the distribution grid side respectively, and after obtaining the corresponding energy storage planning results, the main grid side considers the influence of the energy storage on the distribution grid side, obtains the third energy storage charging and discharging power, and updates the energy storage planning results on the main grid side, so that the main grid side can dynamically adjust its own operating status, thereby better coordinating the power distribution between the main grid and the distribution grid energy storage, optimizing energy utilization efficiency, and thus improving the stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a system architecture diagram of an energy storage planning system provided by an embodiment of the present application;

[0020] Figure 2 It is a flowchart of an energy storage planning method provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a third energy storage charging and discharging power curve provided in an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of an energy storage capacity curve provided in an embodiment of the present application;

[0023] Figure 5 This is a block diagram of the functional units of an energy storage planning device provided in an embodiment of the present application;

[0024] Figure 6 It is a block diagram of the functional units of another energy storage planning device provided in an embodiment of the present application;

[0025] Figure 7 It is a structural schematic diagram of an electronic device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] At present, with the large-scale access of new energy sources, the volatility and uncertainty of the power system have increased, which can easily lead to power imbalance, power mismatch and difficulty in absorbing renewable energy, thus affecting the stability of the power grid.

[0030] In view of the above problems, an embodiment of the present application provides an energy storage planning method and related devices, which are described in detail below in conjunction with the accompanying drawings.

[0031] See also Figure 1 , Figure 1 1 is a system architecture diagram of an energy storage planning system provided by an embodiment of the present application. Figure 1 As shown, the energy storage planning system 100 includes a planning module 101, an adjustment module 102, and a resource allocation module 103. The planning module 101, the adjustment module 102, and the resource allocation module 103 are connected in communication with each other. The planning module 101 is used to collect various historical data under the distribution network, including load data, new energy power generation data, power grid operation status data, etc. According to the collected data, the main network and the distribution network are considered to have problems to be solved, and the energy storage planning of the main network and the distribution network are generated, and the energy storage planning of the main network and the distribution network are transmitted to the adjustment module 102. The adjustment module 102 is used to adjust the energy storage planning of the main network according to the energy storage planning of the distribution network, and obtain the main and distribution integrated energy storage planning results according to the adjusted main network and distribution network energy storage planning, and transmit the main and distribution integrated energy storage planning results to the resource allocation module 103. The resource allocation module 103 is used to allocate resources according to the main and distribution integrated energy storage planning results.

[0032] See also Figure 2 , Figure 2 is a flow chart of an energy storage planning method provided in an embodiment of the present application, such as Figure 2 As shown, the method comprises the following steps:

[0033] S210, determining a first energy storage planning result on the main network side; and determining a second energy storage planning result on the distribution network side.

[0034] Among them, the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes multiple second energy storage charging and discharging power curves of each target substation. The target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side.

[0035] Among them, in the power system, the main grid is usually used for long-distance, large-capacity power transmission network systems. It is responsible for transmitting electricity from power plants to distribution networks or directly to large industrial users. Its voltage level is usually high, such as 110kV, 220kV, 500kV and above, which can effectively reduce transmission losses. The distribution network is responsible for converting high-voltage power from the main grid into medium and low-voltage power for distribution to various end users, including residential, commercial and small industrial users. Its voltage level is usually low, such as 220V, 400V, 10kV, 35kV, etc.

[0036] Among them, energy storage planning refers to the rational design and deployment of energy storage devices in the power system, and the formulation of the operation mode of energy storage under typical working conditions within the planning period. For example, energy storage can store electricity generated during low-demand periods and release it during peak demand periods, thereby improving the flexibility and stability of the power system.

[0037] Specifically, the determining of the first energy storage planning result on the main grid side; and the determining of the second energy storage planning result on the distribution grid side include: determining the typical output curve and the typical load curve of the distribution grid side under each target substation; obtaining a comprehensive output curve according to the typical output curve of the distribution grid side under each target substation; and obtaining a comprehensive load curve according to the typical load curve of the distribution grid side under each target substation; determining the first constraint condition for energy storage planning on the main grid side; and determining the second constraint condition for energy storage planning on the distribution grid side; performing energy storage planning on the main grid side according to the comprehensive output curve, the comprehensive load curve and the first constraint condition to obtain the first energy storage planning result; performing energy storage planning on the distribution grid side under each target substation according to the typical output curve and the typical load curve of the distribution grid side under each target substation and the second constraint condition to obtain the second energy storage planning result of the distribution grid side under each target substation.

[0038] Among them, since the voltage level boundaries corresponding to different systems may be different, in this embodiment, the target substation can be a 110kV substation, 110kV and above is the main network, and below is the distribution network. The main network includes multiple 110kV substations, and a 110kV substation includes multiple distribution lines.

[0039] Among them, typical output curves and typical load curves can be generated according to the historical data under the distribution network, wherein the historical data include the actual measured values ​​of active power and reactive power of the substation distribution network at different times in the past, the actual power generation of new energy power generation equipment at different times in the past, and related meteorological data. Then the collected historical data is cleaned and preprocessed to remove abnormal values. For example, the load power may be unreasonable, which may be caused by the failure or interference of the data acquisition equipment. These abnormal values ​​can be identified and removed by setting a reasonable threshold. After data cleaning, data completion can be performed. For the missing part of the data, a suitable method can be used to complete it. For example, if the load power data of a certain period is missing, it can be filled according to the average load power of the previous and next periods. Then the data is standardized. For example, for the load power data, it can be normalized to between 0-1, so that the distribution network data of different scales are comparable. Finally, data analysis and curve drawing are performed to analyze the load characteristics and the new energy power generation characteristics. According to the characteristics obtained by the analysis, a typical operation curve is drawn.

[0040] Specifically, the daily, weekly and seasonal characteristics of the load data are analyzed. For example, by calculating the daily load curve and observing the change pattern of the load within a day, it may be found that the load is higher during the daytime working hours and lower at night; by analyzing the weekly load curve, it may be found that the load pattern on working days and rest days is different; by analyzing the seasonal load curve, it may be found that the load peaks in summer due to the use of air conditioners and in winter due to the use of heating equipment. For the new energy power generation data, its daily, weekly and seasonal characteristics are also analyzed. For example, for distributed photovoltaic power generation, its power generation curve that changes with the intensity of sunshine in a day is analyzed, and it is found that the power generation reaches a peak when the sunshine is strongest at noon; analyzing its seasonal characteristics, it is found that the power generation in summer is generally higher than that in winter. According to the characteristics obtained by the analysis, a typical operation curve is drawn. For the load curve, a typical daily load curve, a typical weekly load curve and a typical seasonal load curve can be drawn respectively. For example, the daily load curves of multiple working days are averaged to obtain a typical daily load curve for working days; the daily load curves of multiple rest days are averaged to obtain a typical daily load curve for rest days. A similar method is also used for new energy power generation curves, such as drawing a typical daily photovoltaic power generation curve, a typical seasonal wind power generation curve, etc.

[0041] Among them, the typical output curve and typical load curve can also be predicted through the prediction model. For example, the autoregressive moving average model can be used to predict the load of the distribution network or the power generation of new energy based on the autocorrelation and moving average characteristics in the historical data to predict the future value. For example, for a load data with obvious daily and weekly periodicity, the autoregressive moving average model can predict the load change in the next day or week by learning the periodic law in the historical data.

[0042] Among them, the typical output curve and typical load curve generated in the distribution network under each 110kV substation are aggregated to obtain the comprehensive output curve and comprehensive load curve, which are considered as equivalent loads or power sources in the main grid side energy storage planning. Among them, the first constraint condition includes the main grid topology, new energy consumption rate, node voltage limit range, branch limit capacity, etc. The main grid focuses on solving the problems of new energy consumption in the entire main distribution network system and heavy overload of local lines in the main grid. Then, according to the first constraint condition, combined with the comprehensive output curve and the comprehensive load curve, the energy storage main grid side energy storage planning is carried out to obtain the first energy storage planning result. The first energy storage planning result includes the access location, access capacity and operation curve of the energy storage on the main grid side under typical working conditions. The energy storage configuration capacity for each 110kV substation is G i , i = 1, 2, ..., N, N is the number of 110kV substations, the operation curve is the charging and discharging power curve of the energy storage under the main grid, which is the charging and discharging behavior or change of the energy storage system under different typical working conditions. Typical working conditions include peak load period, new energy output fluctuation period, etc. The charging and discharging power curve of the energy storage under the main grid is set as P i , P is a vector, i = 1, 2, ..., N, P ij represents the power value of the energy storage section in the i-th 110kV substation at time j, j = 1, 2, ..., M, M represents the total number of calculation time sections corresponding to all typical working conditions.

[0043] Among them, the second constraint conditions include distribution network topology, node voltage limit range, branch limit capacity, branch flow direction restriction, etc. The distribution network focuses on solving the problems of heavy overload, power reverse transmission, and voltage qualification rate of local lines in the distribution network. Then, according to the second constraint conditions, combined with the typical output curve and the typical load curve, the energy storage distribution network side energy storage planning is carried out to obtain the second energy storage planning result. The second energy storage planning result includes the access node location, access capacity and operation curve of energy storage under typical working conditions on the distribution network side. Among them, the energy storage configuration capacity on each access node is g ij , i = 1, 2, ..., N, j = 1, 2, ..., K, K is the number of nodes in the distribution network under the i-th 110kV substation, and the operation curve is the energy storage charging and discharging power curve under the distribution network, which is set to p ij , p is a vector, i = 1, 2, ..., N, j = 1, 2, ..., K, pijk Represents the power value of the section of the j-th energy storage access node of the distribution network under the i-th 110kV substation at time k, k = 1, 2, ..., M.

[0044] Specifically, energy storage planning can be performed according to an energy storage planning model, a mixed integer linear programming algorithm, or a particle swarm optimization algorithm. Exemplarily, in the main grid side energy storage planning, the installation location, capacity, and charging and discharging strategy of energy storage can be used as decision variables, and the objective function can be to minimize the sum of the investment cost, operating cost, and wind and solar curtailment cost of the energy storage system. The constraints include the main grid topology, the new energy consumption rate, the node voltage limit range, and the branch limit capacity. Among them, the main grid topology can represent the connection relationship between nodes through an association matrix to ensure the reasonable flow of power in the power grid. The new energy consumption rate can establish constraints based on the new energy power generation and load demand and the regulating role of energy storage to ensure the full utilization of new energy. The node voltage limit range can use the power flow equation to link the node voltage with the power to limit the voltage within the allowable range. The branch limit capacity can ensure that the branch transmission power does not exceed its capacity through the power transmission restriction condition.

[0045] S220: Adjust the first energy storage charging and discharging power curve according to the plurality of second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve.

[0046] Specifically, adjusting the first energy storage charge and discharge power curve according to the multiple second energy storage charge and discharge power curves to obtain the third energy storage charge and discharge power curve includes: determining a comprehensive energy storage charge and discharge power curve according to the multiple second energy storage charge and discharge power curves; and merging the comprehensive energy storage charge and discharge power curve with the first energy storage charge and discharge power curve to obtain the third energy storage charge and discharge power curve.

[0047] Among them, the first energy storage charging and discharging power curve P obtained by the main grid side energy storage planning of each 110kV substation i , corresponding to the comprehensive energy storage charging and discharging power curve of each access node on the distribution network side Merge to obtain the third energy storage charging and discharging power curve P' on the main grid side of each 110kV substation i Specifically, the third energy storage charging and discharging power curve P' i Satisfies any time section k, For further information, see Figure 3 , Figure 3 A schematic diagram of a third energy storage charging and discharging power curve provided in an embodiment of the present application, such as Figure 3 As shown, taking the 48-hour energy storage charge and discharge power curve as an example, the first energy storage charge and discharge power curve P i And the comprehensive energy storage charging and discharging power curve pi The horizontal axis is in hours and the vertical axis is in kilowatts.

[0048] S230: Update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result.

[0049] Among them, the original first energy storage charge and discharge power curve in the first energy storage planning result is deleted, and the third energy storage charge and discharge power curve is added to obtain the third energy storage planning result, and the third energy storage planning result also includes information such as the energy storage access location and access capacity in the first energy storage planning result. The third energy storage charge and discharge power curve is used as the new operating curve of the main grid, taking into account the impact of distribution network energy storage, which is conducive to the main grid dynamically adjusting its own operating status according to the operating curve of the distribution network.

[0050] S240: Obtain a target energy storage planning result according to the third energy storage planning result and the second energy storage planning result.

[0051] Specifically, the first energy storage planning result also includes the first energy storage configuration capacity of each target substation, the second energy storage planning result also includes multiple second energy storage configuration capacities of multiple energy storage access node positions under each target substation, and the energy storage access node positions correspond to the second energy storage configuration capacities one by one. The target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result, including: determining the initial energy storage capacity of each target substation on the main grid side; determining an energy storage capacity curve according to the third energy storage charging and discharging power curve and the initial energy storage capacity; determining whether the main grid side meets the energy storage capacity constraint according to the energy storage capacity curve; if the energy storage capacity constraint is not met, determining the energy storage charging and discharging depth according to the energy storage capacity curve; determining the additional configured energy storage capacity of the main grid side according to the energy storage charging and discharging depth, the multiple second energy storage configuration capacities and the first energy storage configuration capacity; updating the third energy storage planning result according to the additional configured energy storage capacity to obtain a fourth energy storage planning result; and obtaining the target energy storage planning result according to the fourth energy storage planning result and the second energy storage planning result.

[0052] Among them, the initial energy storage capacity refers to the total amount of electric energy that can be stored when the energy storage system is first put into use or in a certain initial state. It is an actual energy storage indicator used to describe the initial energy reserve of the energy storage system. An example may be 200MWh.

[0053] Specifically, determining the energy storage capacity curve according to the third energy storage charge and discharge power curve and the initial energy storage capacity includes: determining the second time interval of the energy storage capacity curve according to the first time interval of the third energy storage charge and discharge power curve; determining the first charge and discharge efficiency of the main grid-side energy storage; and determining the second charge and discharge efficiency of the distribution grid-side; determining the energy storage capacity change value within each second time interval according to the third energy storage charge and discharge power curve, the first charge and discharge efficiency, and the second charge and discharge efficiency; and obtaining the energy storage capacity curve according to the energy storage capacity change value within each second time interval.

[0054] The first time interval refers to the time difference between two adjacent data points in the third energy storage charge and discharge power curve, and the second time interval refers to the time difference between two adjacent data points when recording the energy storage capacity change. Specifically, it is necessary to show the capacity change in more detail in the energy storage capacity curve. It can be confirmed that the second time interval is greater than the first time interval. For example, refer to Figure 3 The first time interval is 2 hours, and the second time interval can be 3 hours.

[0055] Among them, the single charge and discharge efficiency includes charging efficiency and discharging efficiency. The charging efficiency refers to the ratio of the energy actually stored in the energy storage device to the input energy during the charging process of the energy storage system. For example, if the charging efficiency is 90%, it means that for every 100 units of energy input, only 90 units of energy are actually stored in the energy storage device. The discharging efficiency refers to the ratio of the energy actually output from the energy storage device to the energy reduced in the energy storage device during the discharge process of the energy storage system. For example, if the discharge efficiency is 95%, when the energy storage device reduces 100 units of energy, the energy actually output to the outside is 95 units.

[0056] Specifically, initialize the variables, set the initial time t = 0, the initial energy storage capacity is E = 200MWh, and define an array or list to store the energy storage capacity value after each time interval. For the charging process, for each time interval, check the third energy storage charging and discharging power curve. If the power is positive in this time interval, it means charging, then consider the charging efficiency to calculate the actual increase in energy storage capacity. For example, if the charging efficiency is 90%, the charging power is 100kW, and the time interval is 1 hour, then the actual increase in energy storage capacity is 90kWh. For the discharge process, if the power is negative in the time interval, indicating discharge, then consider the discharge efficiency to calculate the actual decrease in energy storage capacity. For example, if the discharge efficiency is 95%, the discharge power is -50kW, and the time interval is 1 hour, then the actual decrease in energy storage capacity is 52.63kWh. The energy storage capacity is updated according to the capacity change calculated above. For the same time interval, if it is a charging process, the updated energy storage capacity is the sum of the energy storage capacity of the previous time interval and the increase in energy storage capacity; if it is a discharging process, the updated energy storage capacity is the difference between the energy storage capacity of the previous time interval and the decrease in energy storage capacity. The energy storage capacity corresponding to each time interval is obtained according to the above method, and then the energy storage capacity curve is drawn. For details, please refer to Figure 4 , Figure 4 is a schematic diagram of an energy storage capacity curve provided in an embodiment of the present application, Figure 4 According to the third energy storage charging and discharging power curve P' i , the energy storage capacity curve determined by the first charge and discharge efficiency and the second charge and discharge efficiency, the horizontal axis is in hours, the time interval is 3 hours, and the vertical axis is in kilowatt-hours.

[0057] It can be seen that in the embodiment of the present application, by referring to the third energy storage charging and discharging power curve and considering the charging and discharging efficiency of the main grid side and the distribution grid side, the obtained energy storage capacity curve can more accurately reflect the actual available capacity of the energy storage system. At the same time, the actual discharge capacity of the energy storage system after considering the efficiency loss can be clarified, so as to reasonably dispatch the energy storage system for power supplement and enhance the ability of the power grid to cope with sudden power fluctuations.

[0058] Specifically, determining whether the main grid side meets the energy storage capacity constraint according to the energy storage capacity curve includes: determining a third energy storage configuration capacity of the main grid side according to the energy storage capacity curve; aggregating the multiple second energy storage configuration capacities to obtain a fourth energy storage configuration capacity; determining a fifth energy storage configuration capacity according to the first energy storage configuration capacity and the fourth energy storage configuration capacity; and determining whether the main grid side meets the energy storage capacity constraint according to the third energy storage configuration capacity and the fifth energy storage configuration capacity.

[0059] Among them, according to the energy storage capacity curve, the maximum value of the energy storage capacity curve is taken as S imax, the minimum value is S imin , the energy storage configuration capacity of the main grid side is obtained as Among them, S i,max -S i,min Configure capacity for the third energy storage, The fourth energy storage configuration capacity, G i Configure the capacity for the first energy storage, The capacity of the fifth energy storage configuration is as follows: Specifically, the current 110kV substation energy storage access capacity Gi obtained by the main grid side planning will be used to meet the capacity demand obtained by the distribution grid side energy storage planning. At this time, the remaining energy storage capacity on the main grid side is equal to Considering the superimposed influence of the distribution network side energy storage operation mode on the main grid side energy storage operation mode, the superimposed main grid side energy storage charge and discharge depth is S i,max -S i,min ,if This indicates that the existing energy storage capacity cannot meet the superimposed operation requirements. It is determined that the main grid side does not meet the energy storage capacity constraint. New energy storage will be configured on the main grid side. The additional energy storage capacity is equal to

[0060]

[0061] Among them, after obtaining the additional configured energy storage capacity, it is added to the third energy storage planning result to obtain the fourth energy storage planning result, and combined with the second energy storage planning result on the distribution network side to form the energy storage planning result of the entire main and distribution integrated system.

[0062] It can be seen that in the embodiment of the present application, the energy storage planning of the main grid side and the distribution grid side can optimize the configuration and utilization efficiency of energy storage resources. And the main grid side can effectively respond to various emergencies by considering the energy storage capacity constraints after considering the impact of the distribution grid side, which helps to maintain the power balance of the power grid.

[0063] It can be seen that in the embodiment of the present application, the present application performs energy storage planning on the main grid side and the distribution grid side respectively, and after obtaining the corresponding energy storage planning results, the main grid side considers the influence of the energy storage on the distribution grid side, obtains the third energy storage charging and discharging power, and updates the energy storage planning results on the main grid side, so that the main grid side can dynamically adjust its own operating status, thereby better coordinating the power distribution between the main grid and distribution grid energy storage, optimizing energy utilization efficiency, and thus improving the stability of the power grid.

[0064] For the above embodiments, please refer to Figure 5 , Figure 5 is a functional unit block diagram of an energy storage planning device provided in an embodiment of the present application, such as Figure 5As shown, the energy storage planning device 50 includes: a determination unit 51, which is used to determine a first energy storage planning result on the main grid side; and, determines a second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes multiple second energy storage charging and discharging power curves of each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side; an adjustment unit 52, which is used to adjust the first energy storage charging and discharging power curve according to the multiple second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve; an updating unit 53, which is used to update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; a processing unit 54, which is used to obtain a target energy storage planning result according to the third energy storage planning result and the second energy storage planning result.

[0065] In a possible embodiment, the first energy storage planning result also includes a first energy storage configuration capacity of each target substation, and the second energy storage planning result also includes a plurality of second energy storage configuration capacities of a plurality of energy storage access node positions under each target substation, and the energy storage access node positions correspond one to one to the second energy storage configuration capacities. In terms of obtaining the target energy storage planning result according to the third energy storage planning result and the second energy storage planning result, the processing unit 54 is specifically used to: determine the initial energy storage capacity of each target substation under the main grid side; and calculate the energy storage capacity of each target substation according to the third energy storage charging and discharging power curve and The initial energy storage capacity determines an energy storage capacity curve; determines whether the main grid side meets the energy storage capacity constraint according to the energy storage capacity curve; if the energy storage capacity constraint is not met, determines the energy storage charge and discharge depth according to the energy storage capacity curve; determines the additional configured energy storage capacity of the main grid side according to the energy storage charge and discharge depth, the multiple second energy storage configuration capacities and the first energy storage configuration capacity; updates the third energy storage planning result according to the additional configured energy storage capacity to obtain a fourth energy storage planning result; obtains the target energy storage planning result according to the fourth energy storage planning result and the second energy storage planning result.

[0066] In a possible embodiment, in terms of determining whether the main grid side satisfies the energy storage capacity constraint according to the energy storage capacity curve, the processing unit 54 is further specifically used to: determine a third energy storage configuration capacity of the main grid side according to the energy storage capacity curve; aggregate the multiple second energy storage configuration capacities to obtain a fourth energy storage configuration capacity; determine a fifth energy storage configuration capacity according to the first energy storage configuration capacity and the fourth energy storage configuration capacity; and determine whether the main grid side satisfies the energy storage capacity constraint according to the third energy storage configuration capacity and the fifth energy storage configuration capacity.

[0067] In a possible embodiment, in terms of adjusting the first energy storage charge and discharge power curve according to the multiple second energy storage charge and discharge power curves to obtain the third energy storage charge and discharge power curve, the adjustment unit 52 is specifically used to: determine a comprehensive energy storage charge and discharge power curve according to the multiple second energy storage charge and discharge power curves; and merge the comprehensive energy storage charge and discharge power curve with the first energy storage charge and discharge power curve to obtain the third energy storage charge and discharge power curve.

[0068] In a possible embodiment, in determining the first energy storage planning result on the main grid side; and determining the second energy storage planning result on the distribution grid side, the determination unit 51 is specifically used to: determine the typical output curve and the typical load curve of the distribution grid side under each target substation; obtain a comprehensive output curve according to the typical output curve of the distribution grid side under each target substation; and obtain a comprehensive load curve according to the typical load curve of the distribution grid side under each target substation; determine the first constraint condition for energy storage planning on the main grid side; and determine the second constraint condition for energy storage planning on the distribution grid side; perform energy storage planning on the main grid side according to the comprehensive output curve, the comprehensive load curve and the first constraint condition to obtain the first energy storage planning result; perform energy storage planning on the distribution grid side under each target substation according to the typical output curve and the typical load curve of the distribution grid side under each target substation and the second constraint condition to obtain the second energy storage planning result of the distribution grid side under each target substation.

[0069] In a possible embodiment, in terms of determining the energy storage capacity curve according to the third energy storage charge and discharge power curve and the initial energy storage capacity, the processing unit 54 is further specifically used to: determine the second time interval of the energy storage capacity curve according to the first time interval of the third energy storage charge and discharge power curve; determine the first charge and discharge efficiency of the main grid-side energy storage; and determine the second charge and discharge efficiency of the distribution grid-side energy storage; determine the energy storage capacity change value within each second time interval according to the third energy storage charge and discharge power curve, the first charge and discharge efficiency, and the second charge and discharge efficiency; and obtain the energy storage capacity curve according to the energy storage capacity change value within each second time interval.

[0070] In a possible embodiment, the first energy storage planning result also includes the energy storage access position of each target substation on the main grid side; the second energy storage planning result also includes multiple energy storage access node positions under each target substation.

[0071] It can be understood that since the method embodiment and the device embodiment are different presentation forms of the same technical concept, the content of the method embodiment part in this application should be synchronously adapted to the device embodiment part and will not be repeated here.

[0072] In the case of integrated units, see Figure 6 , Figure 6 is a block diagram of the functional units of another energy storage planning device provided in an embodiment of the present application, such as Figure 6 As shown, the energy storage planning device 50 includes: a processing module 502 and a communication module 501. The processing module 502 is used to control and manage the actions of the energy storage planning device 50, for example, to execute the steps of the determination unit 51, the adjustment unit 52, the update unit 53 and the processing unit 54, and / or to execute other processes of the technology described in this article. The communication module 501 is used for the interaction between the energy storage planning device 50 and other devices. Figure 6 As shown, the energy storage planning device 50 may further include a storage module 503 , and the storage module 503 is used to store program codes and data of the energy storage planning device 50 .

[0073] Wherein, the processing module 502 can be a processor or a controller, for example, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic boxes, modules and circuits described in conjunction with the disclosure of the present application. The processor can also be a combination that implements a computing function, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication module 501 can be a transceiver, an RF circuit or a communication interface, and the like. The storage module 503 can be a memory.

[0074] Among them, all relevant contents of each scenario involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here. Figure 2 The energy storage planning method shown.

[0075] See also Figure 7 , Figure 7 is a schematic diagram of the structure of an electronic device proposed in an embodiment of the present application, such as Figure 7As shown, the electronic device 700 includes a processor 710, a memory 720, a communication interface 730 and one or more programs 721. The one or more programs 721 are stored in the memory and are configured to be executed by the processor. When the program is executed, it includes part or all of the steps of any energy storage planning method recorded in the above method embodiment. The processor, memory and communication interface are interconnected and complete communication with each other.

[0076] The memory may be a volatile memory such as a dynamic random access memory (DRAM), or a non-volatile memory such as a mechanical hard disk. The memory is used to store a set of executable program codes, and the processor is used to call the executable program codes stored in the memory, and may execute part or all of the steps of any energy storage planning method recorded in the above energy storage planning method embodiment.

[0077] It can be seen that the electronic device 700 described in the embodiment of the present application first determines the first energy storage planning result on the main grid side; and determines the second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve for each target substation, and the second energy storage planning result includes a plurality of second energy storage charging and discharging power curves for each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side; then the first energy storage charging and discharging power curve is adjusted according to the plurality of second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve; then the first energy storage planning result is updated according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; finally, the target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result. The present application performs energy storage planning on the main grid side and the distribution grid side respectively, and after obtaining the corresponding energy storage planning results, the main grid side considers the influence of the energy storage on the distribution grid side, obtains the third energy storage charging and discharging power, and updates the energy storage planning results on the main grid side, so that the main grid side can dynamically adjust its own operating status, thereby better coordinating the power distribution between the main grid and the distribution grid energy storage, optimizing energy utilization efficiency, and thus improving the stability of the power grid.

[0078] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps of any method described in the above method embodiments, and the above computer includes an electronic device.

[0079] The embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, the computer program is operable to cause a computer to execute some or all of the steps of any method described in the method embodiment. The computer program product may be a software installation package, and the computer includes an electronic device.

[0080] It should be noted that, for the sake of simplicity, the aforementioned method implementations are all described as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the implementations described in the specification are all optional implementations, and the actions and modules involved are not necessarily required by the present application.

[0081] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0082] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device implementation described above is only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0083] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0084] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software program module.

[0085] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk, etc., and other media that can store program codes.

[0086] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0087] The above is a detailed introduction to the implementation methods of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above implementation methods is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for energy storage planning, characterized in that: Applied to energy storage planning systems, including: Determine a first energy storage planning result on the main grid side; and determine a second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes a plurality of second energy storage charging and discharging power curves of each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side; Adjusting the first energy storage charge and discharge power curve according to the plurality of second energy storage charge and discharge power curves to obtain a third energy storage charge and discharge power curve; Update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; A target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result.

2. The method according to claim 1, characterized in that The first energy storage planning result further includes a first energy storage configuration capacity of each target substation, the second energy storage planning result further includes a plurality of second energy storage configuration capacities of a plurality of energy storage access node positions under each target substation, the energy storage access node positions corresponding to the second energy storage configuration capacities one by one, and the target energy storage planning result is obtained according to the third energy storage planning result and the second energy storage planning result, including: Determining the initial energy storage capacity of each target substation on the main grid side; Determining an energy storage capacity curve according to the third energy storage charge and discharge power curve and the initial energy storage capacity; Determining whether the main grid side meets the energy storage capacity constraint according to the energy storage capacity curve; If the energy storage capacity constraint is not met, determining the energy storage charge and discharge depth according to the energy storage capacity curve; Determine the additional configured energy storage capacity of the main grid side according to the energy storage charge and discharge depth, the plurality of second energy storage configuration capacities and the first energy storage configuration capacity; Update the third energy storage planning result according to the additional configured energy storage capacity to obtain a fourth energy storage planning result; The target energy storage planning result is obtained according to the fourth energy storage planning result and the second energy storage planning result.

3. The method according to claim 2, characterized in that The determining, according to the energy storage capacity curve, whether the main grid side satisfies the energy storage capacity constraint includes: Determine the third energy storage configuration capacity of the main grid side according to the energy storage capacity curve; Aggregating the plurality of second energy storage configuration capacities to obtain a fourth energy storage configuration capacity; Determining a fifth energy storage configuration capacity according to the first energy storage configuration capacity and the fourth energy storage configuration capacity; Determine whether the main grid side meets the energy storage capacity constraint according to the third energy storage configuration capacity and the fifth energy storage configuration capacity.

4. The method according to any one of claims 1 to 3, characterized in that: The adjusting the first energy storage charge and discharge power curve according to the plurality of second energy storage charge and discharge power curves to obtain a third energy storage charge and discharge power curve comprises: Determine a comprehensive energy storage charging and discharging power curve according to the plurality of second energy storage charging and discharging power curves; The comprehensive energy storage charge and discharge power curve and the first energy storage charge and discharge power curve are combined to obtain the third energy storage charge and discharge power curve.

5. The method according to claim 4, characterized in that Determining the first energy storage planning result on the main grid side; And, determine the second energy storage planning result on the distribution network side, including: Determine a typical output curve and a typical load curve of the distribution network side under each target substation; Obtaining a comprehensive output curve according to a typical output curve of the distribution network side under each target substation; and obtaining a comprehensive load curve according to a typical load curve of the distribution network side under each target substation; Determine a first constraint condition for energy storage planning on the main network side; and determine a second constraint condition for energy storage planning on the distribution network side; Performing energy storage planning on the main grid side according to the comprehensive output curve, the comprehensive load curve and the first constraint condition to obtain the first energy storage planning result; Energy storage planning is performed on the distribution network side under each target substation according to the typical output curve and the typical load curve of the distribution network side under each target substation and the second constraint condition to obtain a second energy storage planning result of the distribution network side under each target substation.

6. The method according to claim 2, characterized in that The step of determining the energy storage capacity curve according to the third energy storage charge and discharge power curve and the initial energy storage capacity comprises: Determining a second time interval of the energy storage capacity curve according to the first time interval of the third energy storage charge and discharge power curve; Determining a first charging and discharging efficiency of the main grid-side energy storage; and determining a second charging and discharging efficiency of the distribution grid-side energy storage; Determine a change value of energy storage capacity in each second time interval according to the third energy storage charge and discharge power curve, the first charge and discharge efficiency, and the second charge and discharge efficiency; The energy storage capacity curve is obtained according to the energy storage capacity change value in each second time interval.

7. The method according to claim 2, characterized in that The first energy storage planning result also includes the energy storage access position of each target substation on the main grid side; the second energy storage planning result also includes multiple energy storage access node positions under each target substation.

8. An energy storage planning device, characterized in that: Applied to energy storage planning systems, including: A determination unit, used to determine a first energy storage planning result on the main grid side; and to determine a second energy storage planning result on the distribution grid side; the first energy storage planning result includes a first energy storage charging and discharging power curve of each target substation, and the second energy storage planning result includes a plurality of second energy storage charging and discharging power curves of each target substation, and the target substation is a substation located at the voltage level dividing line between the main grid side and the distribution grid side; an adjusting unit, configured to adjust the first energy storage charging and discharging power curve according to the plurality of second energy storage charging and discharging power curves to obtain a third energy storage charging and discharging power curve; An updating unit, configured to update the first energy storage planning result according to the third energy storage charging and discharging power curve to obtain a third energy storage planning result; A processing unit is used to obtain a target energy storage planning result according to the third energy storage planning result and the second energy storage planning result.

9. An electronic device, characterized in that: The method comprises a processor and a memory storing execution instructions, wherein the memory stores one or more programs; when the processor executes the execution instructions stored in the memory, the processor executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: An energy data management program is stored, including execution instructions. When a processor of an electronic device executes the execution instructions, the processor executes the method according to any one of claims 1-7.

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