Method, system and equipment for analyzing effect of energy storage configuration of transformer substation and medium

Abstract

The invention provides an effect analysis method, system and device for energy storage configuration of a transformer substation and a medium, and the method comprises the steps: analyzing the daily load time sequence data of the transformer substation to be subjected to energy storage configuration before distribution and storage, and obtaining the daily load peak-valley difference before distribution and storage and the daily main transformer load rate before distribution and storage; according to the operation information of the transformer substation, setting an energy storage capacity and a charging and discharging strategy for an energy storage facility connected to the transformer substation; performing simulation calculation on the transformer substation connected to the energy storage facility to obtain a daily load peak-valley difference after distribution and storage and a daily main transformer load rate after distribution and storage; and analyzing the daily load peak-valley difference before distribution and storage, the daily main transformer load rate before distribution and storage, the daily load peak-valley difference after distribution and storage and the daily main transformer load rate after distribution and storage, and determining the distribution and storage effect of the transformer substation. The energy storage effect of the transformer substation can be analyzed from the power grid side, so that the existing energy storage problem of the transformer substation is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage configuration, and in particular to a method, system, equipment and medium for analyzing the effect of energy storage configuration in a substation. Background Art

[0002] In recent years, various new energy storage technologies have developed rapidly, such as lithium-ion batteries, sodium-sulfur batteries, flow batteries, etc. These technologies have not only gradually reduced their costs but also continuously improved their performance, thus providing more possibilities for efficient and flexible energy management. Especially under the conditions of distributed power access, the reasonable planning and deployment of energy storage devices is of great significance for optimizing resource allocation and promoting energy conservation and emission reduction.

[0003] At the same time, with the continuous growth of energy demand and the increasing complexity of the power grid structure, the energy storage configuration of substations has become an important means to improve the stability, economy and reliability of the power grid. However, how to accurately evaluate the substation storage effect and determine a reasonable energy storage configuration plan is an important issue facing the current energy storage planning field. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention proposes a method, system, device and medium for analyzing the effect of energy storage configured in a substation, aiming to analyze the energy storage effect of the substation from the grid side to alleviate the existing energy storage problems of the substation.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] In one aspect, the present invention provides a method for analyzing the effect of configuring energy storage in a substation, the method comprising:

[0007] Analyze the load time series data of the substation to be equipped with energy storage the day before the energy storage is deployed, and obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is deployed;

[0008] According to the operation information of the substation, setting the energy storage capacity and charging and discharging strategy for the energy storage facilities connected to the substation;

[0009] Perform simulation calculation on the substation connected to the energy storage facility to obtain the daily load peak-to-valley difference and the daily main transformer load rate after storage;

[0010] The peak-to-valley difference of the load on the day before the storage, the load rate of the main transformer on the day before the storage, the peak-to-valley difference of the load on the day after the storage, and the load rate of the main transformer on the day after the storage are analyzed to determine the storage effect of the substation.

[0011] Optionally, setting the energy storage capacity and charging and discharging strategy for the energy storage facility connected to the substation according to the operation information of the substation includes:

[0012] From the operation information, the number of main transformers of the substation, the capacity of a single main transformer, the maximum load, and the peak and valley periods of electricity consumption of the substation in each day are obtained;

[0013] According to the energy storage capacity calculation formula, the number of main transformers, the capacity of a single main transformer and the maximum load are calculated to generate the energy storage capacity;

[0014] The load characteristic curve of the substation during the daily peak power consumption period, the power consumption trough period and the load time series data of the previous day of distribution and storage corresponding to the previous day of distribution and storage is analyzed to obtain the charging and discharging strategy.

[0015] Optionally, analyzing the load peak-to-valley difference on the day before the storage allocation, the main transformer load rate on the day before the storage allocation, the load peak-to-valley difference on the day after the storage allocation, and the main transformer load rate on the day after the storage allocation to determine the storage allocation effect of the substation includes:

[0016] Obtaining the peak-to-valley difference between the load peak-to-valley difference on the day after the storage allocation and the load peak-to-valley difference on the day before the storage allocation, and the load rate difference between the main transformer load rate on the day after the storage allocation and the main transformer load rate on the day before the storage allocation;

[0017] If the peak-to-valley difference is greater than the first preset difference, and the load rate difference is greater than the second preset difference, then the storage allocation effect is determined to be a storage allocation success;

[0018] If the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference, it is determined that the storage allocation effect is a storage allocation failure.

[0019] Optionally, if the peak-to-valley difference is greater than a first preset difference, and the load rate difference is greater than a second preset difference, then after determining that the storage allocation effect is a storage allocation success, the method further includes:

[0020] The load characteristic curve of the day before storage corresponding to the load time series data of the day before storage, the load characteristic curve of the day after storage corresponding to the load time series data of the day after storage, and the energy storage characteristic curve generated based on the energy storage capacity and the charging and discharging strategy are superimposed and displayed.

[0021] Optionally, if the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference, then after determining that the storage allocation effect is a storage allocation failure, the method further includes:

[0022] The energy storage capacity and the charging and discharging strategy of the energy storage facility connected to the substation are adjusted respectively to obtain the adjusted energy storage facility;

[0023] Performing simulation calculation on the substation connected to the adjusted energy storage facility to obtain the daily load peak-to-valley difference after the adjustment of the distribution and storage, and the daily main transformer load rate after the adjustment of the distribution and storage;

[0024] The peak-to-valley difference of the load on the day before the storage and allocation, the load rate of the main transformer on the day before the storage and allocation, the peak-to-valley difference of the load on the day after the storage and allocation adjustment, and the load rate of the main transformer on the day after the storage and allocation adjustment are analyzed to determine the storage and allocation effect of the substation again.

[0025] Optionally, before analyzing the load time series data of the substation to be configured with energy storage the day before the energy storage is configured to obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is configured, the method further includes:

[0026] Select areas in the power grid area where it is difficult to absorb new energy, areas with large peak-to-valley differences and overload during peak loads, and areas where the power grid has insufficient power supply capacity;

[0027] Substations in the areas where it is difficult to consume new energy, in the areas where the peak-to-valley difference is large and the load is overloaded during peak hours, and in the areas where the power supply capacity of the power grid is insufficient are determined as the substations to be configured with energy storage.

[0028] Optionally, the load time series data of the substation to be configured with energy storage the day before the energy storage is configured is analyzed to obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is configured, including:

[0029] Reading the maximum and minimum daily load values ​​from the load time series data of the day before the allocation and storage, and calculating the average value of the load time series data of the day before the allocation and storage to obtain the daily average load power;

[0030] The difference between the maximum daily load and the minimum daily load is determined as the peak-to-valley difference of the daily load before storage allocation;

[0031] The percentage between the daily average load power and the rated capacity of the main transformer of the substation is determined as the main transformer load rate on the day before the storage allocation.

[0032] In another aspect, the present invention provides a system for analyzing the effect of configuring energy storage in a substation, the system comprising:

[0033] The first analysis module is used to analyze the load time series data of the substation to be configured with energy storage the day before the energy storage is configured, and obtain the load peak-to-valley difference and the main transformer load rate of the day before the energy storage is configured;

[0034] A setting module, used to set energy storage capacity and charging and discharging strategies for energy storage facilities connected to the substation according to operation information of the substation;

[0035] A simulation calculation module is used to perform simulation calculation on the substation connected to the energy storage facility to obtain the peak-to-valley difference of the daily load after the storage is allocated and the load rate of the main transformer after the storage is allocated;

[0036] The second analysis module is used to analyze the load peak-to-valley difference on the day before the storage configuration, the main transformer load rate on the day before the storage configuration, the load peak-to-valley difference on the day after the storage configuration, and the main transformer load rate on the day after the storage configuration to determine the storage configuration effect of the substation.

[0037] In another aspect, the present invention further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0038] The memory is used to store one or more programs;

[0039] When the one or more programs are executed by the at least one processor, the method for analyzing the effect of configuring energy storage in a substation as described in any one of the above items is implemented.

[0040] On the other hand, the present invention further provides a readable storage medium having an execution program stored thereon, and when the execution program is executed, the method for analyzing the effect of configuring energy storage in a substation as described in any of the above items is implemented.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The present invention provides a method, system, device and medium for analyzing the effect of energy storage configuration in a substation. On the basis of configuring the energy storage capacity and charging and discharging strategy that match the operation information of the substation, the substation energy storage configuration effect is determined by analyzing the data before and after the substation to be configured with energy storage is connected to the energy storage facility (load peak-to-valley difference, daily main transformer load rate). In this way, on the one hand, the energy storage capacity and charging and discharging strategy of the energy storage facility connected to the substation are determined based on the operation information of the substation, which can provide a more reasonable energy storage solution for the substation; on the other hand, by analyzing the daily load data before and after the substation is connected to the energy storage facility, it is realized from the power grid side, by matching the energy storage configuration solution for the substation and analyzing whether the corresponding energy storage effect is reasonable, so as to alleviate the existing energy storage problem of the substation.

[0043] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions provided by the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0045] Figure 1 A schematic diagram of a flow chart of a method for analyzing the effect of configuring energy storage in a substation provided by an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of a display interface for a charging and discharging strategy of an energy storage facility provided in an embodiment of the present invention;

[0047] Figure 3 A schematic diagram of a curve superposition diagram of a substation before and after storage configuration provided by an embodiment of the present invention;

[0048] Figure 4 A schematic diagram of a flow chart for analyzing the energy storage configuration of a substation by applying the method for analyzing the effect of configuring energy storage in a substation provided by the present invention;

[0049] Figure 5 A schematic diagram of the composition of a system for analyzing the effect of configuring energy storage in a substation provided by an embodiment of the present invention;

[0050] Figure 6 A schematic diagram of the composition of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0052] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0053] In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the embodiments of the present invention. The terms used herein are only for the purpose of describing the embodiments of the present invention and are not intended to limit the embodiments of the present invention.

[0055] With the continuous growth of energy demand and the increasing complexity of the power grid structure, the energy storage configuration of substations has become an important means to improve the stability, economy and reliability of the power grid. However, how to accurately evaluate the substation storage effect and determine a reasonable energy storage configuration plan is an important issue facing the current energy storage planning field.

[0056] Based on the above problems, the present invention proposes a method, system, device and medium for analyzing the effect of energy storage configuration in a substation. On the basis of configuring the energy storage capacity and charging and discharging strategy that match the operation information of the substation, the substation energy storage configuration effect is determined by analyzing the data before and after the energy storage configuration (load peak-to-valley difference, daily main transformer load rate) of the substation to be configured with energy storage. In this way, on the one hand, the energy storage capacity and charging and discharging strategy of the energy storage facility connected to the substation based on the operation information of the substation are determined, which can provide a more reasonable energy storage configuration scheme for the substation; on the other hand, by analyzing the daily load data before and after the energy storage configuration of the substation connected to the energy storage facility, it is possible to start from the power grid side, match the energy storage configuration scheme for the substation and analyze whether the corresponding energy storage effect is reasonable, so as to alleviate the existing energy storage problem of the substation.

[0057] Embodiment 1:

[0058] The embodiment of the present invention provides a method for analyzing the effect of configuring energy storage in a substation. Figure 1 FIG. 1 is a flow chart of a method for analyzing the effect of configuring energy storage in a substation according to an embodiment of the present invention, wherein Figure 1 The following instructions are given:

[0059] Step 101, analyzing the load time series data of the substation to be configured with energy storage the day before the energy storage is configured, and obtaining the load peak-to-valley difference and the main transformer load rate the day before the energy storage is configured.

[0060] In some embodiments of the present invention, the substation to be configured with energy storage is a substation that needs to be configured with energy storage. Here, substations in areas where it is difficult to consume new energy, where the peak-to-valley difference is large, and where the power supply capacity is insufficient can be selected as the substation to be configured with energy storage.

[0061] It should be noted that the number of substations to be configured with energy storage may be determined according to actual needs, and the present invention does not impose any limitation on this.

[0062] In some embodiments of the present invention, before executing step 101, the following steps A1 and A2 may be executed to obtain a substation to be configured with energy storage, namely:

[0063] Step A1: select areas with difficulty in absorbing new energy, areas with large peak-to-valley differences and overload during peak loads, and areas with insufficient power supply capacity of the power grid within the power grid area.

[0064] In some embodiments of the present invention, areas with difficulty in absorbing new energy, areas with large peak-to-valley differences and overload during peak loads, and areas with insufficient power supply capacity of the power grid can be searched and selected from the power grid area. Here, areas with difficulty in absorbing new energy, areas with large peak-to-valley differences and overload during peak loads, and areas with insufficient power supply capacity of the power grid can be the same area or different areas, and the present invention does not impose any limitation on this.

[0065] Step A2: determine the substations in the area where new energy is difficult to consume, the area with large peak-to-valley difference and overload during peak load, and the area where the power grid has insufficient power supply capacity as the substations to be configured with energy storage.

[0066] In some embodiments of the present invention, substations in areas with difficulty in absorbing new energy, areas with large peak-to-valley differences and overload during peak loads, and areas with insufficient power supply capacity of the power grid can be directly determined as substations to be configured with energy storage.

[0067] Here, for substations in areas where it is difficult to absorb new energy, when configuring energy storage in the future, we can combine the distributed photovoltaic carrying capacity assessment and support the absorption of new energy by building grid-side energy storage in areas where it is difficult to absorb new energy. The scale of energy storage construction should be adapted to the development of new energy, and appropriate margins should be left according to the expected development of new energy.

[0068] For substations in areas with large peak-to-valley differences and heavy overloads during peak loads: When configuring energy storage in the future, you can build grid-side energy storage to smooth the load curve to solve the problem of heavy overloads on main transformers and lines during peak loads. The scale of energy storage construction should match the peak-to-valley difference of the load, such as less than 50% of the maximum peak-to-valley difference, and the charging and discharging of energy storage should not cause the grid current to exceed the limit.

[0069] For substations in areas where the power supply capacity of the power grid is insufficient: when energy storage is subsequently configured, the problem of insufficient power supply capacity of the power grid can be solved by building grid-side energy storage.

[0070] In this way, by first selecting areas with difficulty in absorbing new energy, areas with large peak-to-valley differences and overload during peak loads, and areas with insufficient power supply capacity in the power grid area, the substations in the selected areas are used as substations to be configured with energy storage, so as to achieve rapid and convenient determination of the substations to be configured with energy storage.

[0071] In some embodiments of the present invention, the load time series data before energy storage configuration usually refers to the load data of the substation to be configured with energy storage at each time point before energy storage configuration. Here, the load data includes but is not limited to: various information related to the power load of the substation, including: active power, reactive power, power factor, voltage, current and other parameters.

[0072] In some embodiments of the present invention, the above step 101 may be implemented by the following steps 1011 to 1013 (not shown in the figure):

[0073] Step 1011, read the daily load maximum value and the daily load minimum value from the load time series data of the day before the storage allocation, and calculate the average value of the load time series data of the day before the storage allocation to obtain the daily average load power.

[0074] Step 1012: Determine the difference between the maximum daily load and the minimum daily load as the peak-to-valley difference of the daily load before storage allocation.

[0075] Step 1013: Determine the percentage between the daily average load power and the rated capacity of the main transformer of the substation as the main transformer load rate before the storage configuration.

[0076] In some embodiments of the present invention, the maximum daily load (peak load) and the minimum daily load (valley load) can be read from the load time series data of the day before the storage allocation, and the average value of the load time series data of the day before the storage allocation is calculated to obtain the daily average value. Here, if the daily load time series data is power data, then the corresponding daily average value is: the daily average load power.

[0077] Here, the daily load maximum value is directly subtracted from the daily load minimum value to obtain the peak-to-valley difference (value) of the daily load before storage, and the percentage between the daily average load power and the rated capacity of the main transformer of the substation is determined as the main transformer load rate of the day before storage, that is: daily main transformer load rate = (daily average load power / main transformer rated capacity) × 100%.

[0078] In this way, by performing simple mathematical logic operations on the load time series data of the day before storage, the peak-to-valley difference of the load on the day before storage and the load rate of the main transformer on the day before storage can be obtained, which can provide parameter support for subsequent related storage operations.

[0079] Step 102: according to the operation information of the substation, set the energy storage capacity and charging and discharging strategy for the energy storage facilities connected to the substation.

[0080] In some embodiments of the present invention, the operation information of the substation includes: the number of main transformers in the substation, the capacity of a single main transformer, the maximum load, and the daily peak and low electricity consumption periods of the substation, etc., so that the corresponding energy storage capacity and charging and discharging strategies can be set for the energy storage facilities connected to the substation based on the information such as the number of main transformers in the substation, the capacity of a single main transformer, the maximum load, and the daily peak and low electricity consumption periods of the substation.

[0081] It should be noted that energy storage capacity refers to the ability of energy storage facilities to store energy. Here, it can refer to the power data stored in the energy storage facility. Correspondingly, the charging and discharging strategy of the energy storage facility can be described by the charging and discharging duration, charging and discharging times, charging and discharging time periods, and charging and discharging rates within a preset time period (monthly, daily, etc.). Exemplarily, the charging and discharging strategy of the energy storage facility can be described as: discharging from 09:00 to 11:00 and 13:00 to 17:00 every day; charging from 22:00 to 08:00 and 11:00 to 13:00 every day; wherein the corresponding charging and discharging rates can be determined according to actual needs.

[0082] In some embodiments of the present invention, the above step 102 may be implemented by the following steps 1021 to 1023 (not shown in the figure):

[0083] Step 1021: Obtain the number of main transformers of the substation, the capacity of a single main transformer, the maximum load, and the daily peak and valley periods of electricity consumption of the substation from the operation information.

[0084] In some embodiments of the present invention, the daily peak and valley periods of electricity consumption of the substation can be directly read from the operating information of the substation to be configured with energy storage, and parameters such as the number of main transformers, the capacity of a single main transformer, and the maximum load of the substation can be obtained at the same time.

[0085] Step 1022: Calculate the number of main transformers, the capacity of a single main transformer, and the maximum load according to the energy storage capacity calculation formula to generate the energy storage capacity.

[0086] In some embodiments of the present invention, the energy storage capacity calculation formula can be obtained first, and the energy storage capacity required for the energy storage facility can be calculated by using the number of main transformers, the capacity of a single main transformer, and the maximum load. For example, the energy storage capacity configuration of a single substation can refer to the following formula (1):

[0087] P st ≥(P L，max -1.3(N-1)S)÷90% Formula (1);

[0088] Among them, P st is the value of energy storage capacity, in MW; P L，max is the maximum load value of the substation, in MW; N is the number of main transformers in the substation; S is the capacity of a single main transformer in the substation (assuming the power factor is 1), in MW.

[0089] In some embodiments of the present invention, the energy storage capacity configuration method may consider the following aspects:

[0090] 1) Under load power limitation conditions, the power of the configured energy storage should not be lower than the maximum load power limitation power.

[0091] 2) Energy storage is configured to address load power limiting caused by heavy load on the main transformer. The short-term allowable overload rate of a single main transformer should not exceed 1.3 times the main transformer capacity, and the overload time should not exceed 2 hours.

[0092] 3) Considering the 90% efficiency of the energy storage device.

[0093] Step 1023: Analyze the load characteristic curve of the substation during the daily peak power consumption period, the daily low power consumption period, and the load time series data of the previous day of distribution and storage to obtain the charging and discharging strategy.

[0094] In some embodiments of the present invention, the substation can be analyzed during the daily peak and valley periods of electricity consumption to obtain the dispatching operation mode corresponding to the energy storage facility. The load characteristic curve of the day before the storage and distribution corresponding to the dispatching operation mode and the load time series data of the day before the storage and distribution can be analyzed to obtain the charging and discharging strategy corresponding to the energy storage facility.

[0095] In some embodiments of the present invention, a "day-ahead dispatch plan" control mode, that is, its corresponding dispatch operation mode, may be adopted according to the role of the energy storage facility (energy storage station). Among them, the "day-ahead dispatch plan" control mode specifically refers to that, similar to a traditional thermal power plant, the control center sends a 24-hour output curve to the energy storage facility a day ago. During actual operation, the energy storage facility adjusts its output according to the sent 24-hour output curve. However, unlike traditional thermal power plants, energy storage facilities can both generate and absorb electrical power. From the perspective of the power grid, energy storage facilities are both power plants and loads, which can expand the range of peak regulation and improve peak regulation flexibility.

[0096] Here, the specific scheduling strategy is as follows:

[0097] 1) During the low electricity consumption period, the energy storage battery is charged to absorb the excess power and energy in the power grid.

[0098] 2) During peak electricity consumption periods, the energy storage battery discharges and releases the electricity stored during low electricity consumption periods.

[0099] 3) During the charging and discharging process, the charging and discharging power should be controlled to ensure the safe and stable operation of the battery and power system.

[0100] In some embodiments of the present invention, it is also possible to further analyze the load characteristics of the regional power grid, that is, the load characteristic curve of the previous day of distribution storage corresponding to the load time series data of the previous day of distribution storage, and find that the peak power consumption of the power grid occurs in the morning and evening periods, the peak load point occurs in the evening period, and the load level in the waist period is also high. Therefore, the energy storage facility adopts the "two charging and two discharging" (charging twice and discharging twice within 24 hours) operation mode under normal conditions, and adopts the "multiple charging and multiple discharging" operation mode to participate in peak load regulation in emergency situations according to the actual situation of the power grid.

[0101] Among them, the operation mode of the energy storage facility needs to be analyzed in combination with the daily load characteristics of the station. For example, the energy storage facility is planned to participate in the operation of the power grid in a daily "two charging and two discharging" mode, that is, charging twice a day, discharging from 09:00 to 11:00 and 13:00 to 17:00 every day to reduce the load rate of the main transformer; charging from 22:00 to 08:00 and 11:00 to 13:00 every day; and releasing all the electricity during the two peak hours of electricity consumption in one day. Figure 2 As shown, it is a schematic diagram of a display interface of a charging and discharging strategy of an energy storage facility provided by an embodiment of the present invention; wherein the charging and discharging strategy may correspond to three stages: selecting an access point, configuring parameters, and submitting calculations. The adjustable parameters corresponding to the charging and discharging strategy include: Figure 2 As shown: access location, configuration capacity, charging time period and charging duration, etc. Here, the setting parameters corresponding to the access location, configuration capacity, charging time period and charging duration can be determined according to actual needs, such as Figure 2 as shown in .

[0102] In this way, the number of main transformers, the capacity of a single main transformer, the maximum load, and the daily peak and valley periods of electricity consumption in the substation operation information are analyzed to determine the charging and discharging strategy of the energy storage facility, and the energy storage capacity of the energy storage facility is calculated according to the energy storage capacity calculation method of the energy storage facility, that is, a capacity calculation method for energy storage equipment is given, and the charging and discharging strategy of the energy storage facility can be set according to the operation information of the substation, that is, the characteristics of the load in the power grid area where the substation is located. In this way, the configured energy storage capacity and charging and discharging strategy can be made more reasonable.

[0103] Step 103: Simulate and calculate the substation connected to the energy storage facility to obtain the peak-to-valley difference of the daily load after storage and the daily main transformer load rate after storage.

[0104] In some embodiments of the present invention, first, an energy storage facility configured with corresponding energy storage capacity and charging and discharging strategy can be connected to the substation to be configured with energy storage in a preset manner, and the substation connected to the energy storage facility can be simulated and calculated to obtain the daily load time series data of the substation after storage; then, the daily load time series data after storage is analyzed to obtain the daily load peak-to-valley difference after storage and the daily main transformer load rate after storage.

[0105] Here, the daily load time series data after the storage is configured is analyzed to obtain the specific implementation method of the daily load peak-to-valley difference and the daily main transformer load rate after the storage. Please refer to the above description of step 101 (or, step 1011 to step 1013). The specific implementation logic of the two is similar, and the present invention will not go into details.

[0106] Step 104: Analyze the load peak-to-valley difference on the day before the storage configuration, the main transformer load rate on the day before the storage configuration, the load peak-to-valley difference on the day after the storage configuration, and the main transformer load rate on the day after the storage configuration to determine the storage configuration effect of the substation.

[0107] In some embodiments of the present invention, the peak-to-valley difference of the load on the day before storage allocation and the peak-to-valley difference of the load on the day after storage allocation can be used as comparison parameters for numerical comparison to obtain a first comparison value, and the load rate of the main transformer on the day before storage allocation and the load rate of the main transformer on the day after storage allocation can be used as comparison parameters for numerical comparison to obtain a second comparison value, thereby analyzing the first comparison value and the second comparison value at the same time to determine the storage effect of the substation.

[0108] In some embodiments of the present invention, the storage effect of the substation can be described by storage success and storage failure, etc., and the present invention does not make any limitation to this.

[0109] In some embodiments of the present invention, if the daily load peak-valley difference after storage is less than the daily load peak-valley difference before storage, and the daily main transformer load rate after storage is less than the daily main transformer load rate before storage, the storage effect can be considered to be successful, that is, the purpose of storage is to reduce the daily load peak-valley difference and the daily main transformer load rate of the substation.

[0110] It should be noted that when determining the storage effect, the location of the energy storage facility can be further determined, that is, to verify the location of the energy storage facility, that is, whether the access location is reasonable, that is, whether there are conditions suitable for the construction of energy storage such as dense new energy and large load peak-to-valley difference in the region. If there are few new energy sources in the region, the absorption capacity is sufficient, and the user load peak-to-valley difference is also small, it is recommended that the project be temporarily delayed.

[0111] In some embodiments of the present invention, the above step 104 may be implemented by the following steps 1041 to 1043 (not shown in the figure):

[0112] Step 1041, obtaining the peak-to-valley difference between the peak-to-valley difference of the load on the day after the storage is provided and the peak-to-valley difference of the load on the day before the storage is provided, and the load rate difference between the main transformer load rate on the day after the storage is provided and the main transformer load rate on the day before the storage is provided.

[0113] In some embodiments of the present invention, the peak-to-valley difference of the load on the day after storage is allocated is directly subtracted from the peak-to-valley difference of the load on the day before storage is allocated to obtain the peak-to-valley difference, and the load rate of the main transformer on the day after storage is allocated is subtracted from the load rate of the main transformer on the day before storage is allocated to obtain the load rate difference.

[0114] Step 1042: If the peak-to-valley difference is greater than the first preset difference, and the load rate difference is greater than the second preset difference, then it is determined that the storage allocation effect is successful.

[0115] In some embodiments of the present invention, the first preset difference and the second preset difference may be pre-set, and their specific values ​​may be determined according to actual needs, and the present invention does not impose any limitation on this. Exemplarily, the first preset difference and the second preset difference are both greater than 0.

[0116] Exemplarily, the first preset difference is x, and the second preset difference is y.

[0117] Step 1043: If the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference, it is determined that the storage allocation effect is a storage allocation failure.

[0118] In some embodiments of the present invention, if the peak-to-valley difference is greater than the first preset difference, and the load rate difference is greater than the second preset difference, then the storage allocation effect is determined to be a storage allocation success, otherwise, the storage allocation effect is considered to be a storage allocation failure. Here, the conditions corresponding to the storage allocation failure are: the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference.

[0119] In this way, the efficiency of storage allocation effect analysis can be improved by analyzing the storage allocation effect through simple numerical comparison.

[0120] In some embodiments of the present invention, after executing step 1042, the following step B may also be executed:

[0121] Step B, superimposing and displaying the load characteristic curve of the day before the storage configuration corresponding to the load time series data of the day before the storage configuration, the load characteristic curve of the day after the storage configuration corresponding to the load time series data of the day after the storage configuration, and the energy storage characteristic curve generated based on the energy storage capacity and the charging and discharging strategy.

[0122] In some embodiments of the present invention, first, a load characteristic curve of the day before storage allocation corresponding to the load time series data of the day before storage allocation and a load characteristic curve of the day after storage allocation corresponding to the load time series data of the day after storage allocation can be generated; then, an energy storage characteristic curve corresponding to the energy storage facility can be generated based on the energy storage capacity and the charging and discharging strategy; finally, three curves: the load characteristic curve of the day before storage allocation, the load characteristic curve of the day after storage allocation and the energy storage characteristic curve are superimposed and displayed to show the storage allocation effect in a more intuitive way.

[0123] Here, see Figure 3 As shown, it is a schematic diagram of a curve superposition diagram of a substation before and after storage configuration provided by an embodiment of the present invention; wherein, the load characteristic curve of the day before storage configuration, the load characteristic curve of the day after storage configuration and the energy storage characteristic curve are correspondingly shown.

[0124] In this way, by displaying the superposition of the curves before and after allocation and storage, the corresponding effects after successful allocation and storage can be intuitively viewed.

[0125] Correspondingly, after executing step 1042, the following steps C1 to C3 may also be executed:

[0126] Step C1: adjusting the energy storage capacity and the charging and discharging strategy of the energy storage facility connected to the substation respectively to obtain the adjusted energy storage facility.

[0127] In some embodiments of the present invention, the energy storage capacity and charging and discharging strategy of the energy storage facility connected to the substation are adjusted respectively to obtain the adjusted energy storage facility; wherein, the adjustment of the energy storage capacity may be based on the analysis results corresponding to the peak-to-valley difference of the load on the day before the storage, the load rate of the main transformer on the day before the storage, the peak-to-valley difference of the load on the day after the storage, and the load rate of the main transformer on the day after the storage, and the energy storage capacity may be increased or decreased. Correspondingly, the adjustment of the charging and discharging strategy may also be based on the analysis results corresponding to the peak-to-valley difference of the load on the day before the storage, the load rate of the main transformer on the day before the storage, the peak-to-valley difference of the load on the day after the storage, and the load rate of the main transformer on the day after the storage, and the adjustment of the charging and discharging duration, time period, and charging and discharging parameters in the charging and discharging strategy.

[0128] In some embodiments of the present invention, it is also possible to adjust only one of the energy storage capacity and the charging and discharging strategy of the energy storage facility connected to the substation to obtain the adjusted energy storage facility.

[0129] Step C2, performing simulation calculation on the substation connected to the adjusted energy storage facility to obtain the daily load peak-to-valley difference after the adjustment of the distribution and storage, and the daily main transformer load rate after the adjustment of the distribution and storage.

[0130] In some embodiments of the present invention, simulation calculations are performed on the substation connected to the adjusted energy storage facility to obtain the daily load peak-to-valley difference and the daily main transformer load rate after the adjustment of the storage distribution. The corresponding implementation method is similar to that of step 103 above, and reference may be made to the description of step 103 above, which will not be repeated in the present invention.

[0131] Step C3, analyzing the load peak-to-valley difference on the day before the storage allocation, the main transformer load rate on the day before the storage allocation, the load peak-to-valley difference on the day after the storage allocation is adjusted, and the main transformer load rate on the day after the storage allocation is adjusted, and determining the storage allocation effect of the substation again.

[0132] In some embodiments of the present invention, the implementation of step C3 is similar to that of the above step 104, and reference may be made to the above description of step 104, which will not be elaborated in the present invention.

[0133] In this way, after the storage allocation fails, the storage allocation plan is adjusted again and analyzed again based on the adjusted storage allocation plan, so as to realize real-time dynamic changes of storage allocation to match the current energy storage demand of the substation.

[0134] In some embodiments of the present invention, energy storage configuration of a substation is usually implemented by using a grid-side electrochemical energy storage power station (i.e., the energy storage facility is usually an electrochemical energy storage power station), which is mainly used to alleviate grid congestion, delay the expansion and upgrade of power transmission and distribution equipment, etc. Among them:

[0135] Relieve grid congestion: Install energy storage systems (energy storage facilities) upstream of the line. When the line is blocked, the energy that cannot be transmitted can be stored in the energy storage facilities. When the line load is less than the line capacity, the energy storage facilities will discharge to the line. At the same time, energy storage can be arranged at the weak points of the local grid to reduce power restrictions caused by the limited grid section, thereby solving the problem of line congestion in the power transmission area caused by the large installed capacity of new energy.

[0136] Delaying the expansion and upgrading of power transmission and distribution equipment: In power transmission and distribution systems where the load is close to the equipment capacity, energy storage facilities can be used to effectively improve the power grid's power transmission and distribution capabilities, thereby alleviating the construction of new power transmission and distribution equipment and extending the life of power grid equipment.

[0137] It should be noted that the adjustment of energy storage capacity is carried out when the energy storage capacity of the energy storage facilities connected to the substation is not reasonably configured; and the allocated energy storage capacity is usually interrelated with the charging and discharging strategy.

[0138] In some embodiments of the present invention, the following information may be considered when configuring the energy storage capacity and charging and discharging strategy of the energy storage facility. For example, if the energy storage facility generally operates in a "two charging and two discharging" mode per day, the following conditions should be met at the same time:

[0139] First, during the charging period, the rated capacity of the energy storage is ≤ the smaller value of the main transformer and line capacity limit - the maximum load of the user (if not met, a warning should be given: the main transformer or line is heavily overloaded during charging).

[0140] Second, during the discharge period, the rated capacity of the energy storage is ≤ the minimum load (if not met, a warning should be given: there is power flow reverse during discharge).

[0141] Third, the rated capacity of the energy storage is ≤ 50% of the load peak-valley difference (if not met, a warning should be given: energy storage charging and discharging will cause the user's load peak-valley difference to be inverted).

[0142] Corresponding, please refer to Figure 4 As shown, it is a schematic diagram of a process of analyzing the energy storage configuration of a substation by applying the effect analysis method of configuring energy storage in a substation provided by the present invention; wherein, the analysis is performed based on the relevant information before and after the configuration of the energy storage in the substation to be configured with energy storage, and the relevant execution steps are as follows:

[0143] 401. Start.

[0144] 402. Read the load time series data of the day before the energy storage configuration, that is, read the load time series data of the day before the energy storage configuration of the substation to be configured with energy storage.

[0145] 403. Calculate the peak-to-valley difference of the load on the day before the storage and the load rate of the main transformer on the day before the storage. Here, the peak-to-valley difference of the load on the day before the storage and the load rate of the main transformer on the day before the storage can be obtained by analyzing the load time series data on the day before the storage.

[0146] 404. Setting the charging and discharging strategy, charging and discharging time period, and charging and discharging rate. Here, the charging and discharging strategy is set for the energy storage facility connected to the substation to be configured with energy storage.

[0147] 405. Calculate the energy storage configuration capacity, which can be performed simultaneously with 404 to set the energy storage capacity for the energy storage facilities connected to the substation to be configured with energy storage.

[0148] 406. Simulate and obtain the daily load time series data after the energy storage is deployed. Here, the substation connected to the energy storage facility may be simulated to obtain the daily load time series data after the energy storage is deployed.

[0149] 407. Calculate the peak-to-valley difference of the daily load after the storage is deployed and the load rate of the main transformer on the day after the storage is deployed. Here, the time series data of the daily load after the storage is deployed can also be analyzed to obtain the peak-to-valley difference of the daily load after the storage is deployed and the load rate of the main transformer on the day after the storage is deployed.

[0150] 408. Whether the power grid security and stability are improved after the storage is added, that is, whether the operation stability of the substation is improved after the substation is connected to the storage facilities. Here, the storage effect of the substation can be determined by analyzing the load peak-to-valley difference on the day before the storage, the main transformer load rate on the day before the storage, the load peak-to-valley difference on the day after the storage, and the main transformer load rate on the day after the storage, that is, whether the operation stability of the substation is improved. Further, if there is improvement (storage effect is storage success), 409 can be executed; if there is no improvement (storage effect is storage failure), it can be returned and 404 can be executed again.

[0151] 409. Three curves are generated by superposition: the load curve of the day before storage allocation (the curve corresponding to the load time series data of the day before storage allocation), the energy storage load curve (the energy storage characteristic curve generated based on the calculated energy storage capacity and charging and discharging strategy), and the load curve of the day after storage allocation (the curve corresponding to the load time series data of the day after storage allocation).

[0152] 410. End.

[0153] That is to say, the present invention proposes a method for analyzing the effect of configuring energy storage in a substation. First, a substation in an area where it is difficult to absorb new energy, the peak-to-valley difference is large, and the power supply capacity is insufficient is selected, and the load time series data of the substation the day before the storage configuration is analyzed (the load time series data of the day before the storage configuration can generate a corresponding load characteristic curve of the day before the storage configuration), so as to extract from the load time series data of the day before the storage configuration: the peak-to-valley difference of the load the day before the storage configuration, and the load rate of the main transformer the day before the storage configuration. Secondly, the energy storage rated capacity and the charging and discharging strategy are set for the energy storage facilities to be connected to the substation (the charging and discharging strategy includes: daily charging and discharging times, daily charging and discharging time, and daily charging and discharging rate), and the energy storage characteristic curve can also be generated based on the energy storage rated capacity and the charging and discharging strategy. Then, the set energy storage facility is connected to the substation, and the substation is simulated to obtain the time series data of the daily load after energy storage of the substation (the time series data of the daily load after energy storage can generate the load characteristic curve after energy storage), and extract the peak-to-valley difference of the daily load after energy storage and the load rate of the main transformer after energy storage from the time series data of the daily load after energy storage. Finally, the peak-to-valley difference of the load before energy storage, the load rate of the main transformer before energy storage, the peak-to-valley difference of the daily load after energy storage and the load rate of the main transformer after energy storage can be analyzed to determine the energy storage effect of the substation; if the energy storage effect is successful, the curves before and after energy storage of the substation (the load characteristic curve before energy storage and the load characteristic curve after energy storage) and the energy storage characteristic curve can be superimposed to further intuitively display and analyze the load characteristics of the power grid before and after energy storage; if the energy storage effect is a failure, the parameters of the energy storage facility, that is, the rated capacity of energy storage and the charging and discharging strategy, are readjusted again to perform simulation calculations again. In this way, the method for analyzing the effect of substation energy storage configuration provided by the embodiment of the present invention can analyze the improvement effect of energy storage equipment on the power grid (substation) from the power grid side. Compared with the existing energy storage technology, which analyzes the energy storage effect from the perspective of the user side, it is more intuitive and convenient.

[0154] The method for analyzing the effect of configuring energy storage in a substation proposed in the present invention can provide a method for configuring energy storage on the substation side and conducting a rationality test. It selects the substation that needs to be configured with energy storage by analyzing the current power grid conditions such as new energy consumption, peak-to-valley difference, and load rate, and analyzes whether the current power grid has been improved after configuring the energy storage (that is, by configuring a certain capacity of energy storage equipment in the substation, the peak-to-valley difference of the daily load of the substation can be reduced, the daily main transformer load rate can be reduced, etc.), that is, whether the existing problems of the power grid where the substation is located can be alleviated. In addition, if the storage is successfully configured, the daily load characteristic curve before and after the storage corresponding to the substation and the energy storage characteristic curve corresponding to the storage can be superimposed and displayed to generate a curve superposition diagram, so that the energy storage effect can be further intuitively displayed.

[0155] The method for analyzing the effect of energy storage configuration of a substation provided by an embodiment of the present invention first analyzes the load time series data of the substation to be configured with energy storage before the storage configuration, and obtains the load peak-valley difference and the main transformer load rate before the storage configuration; then, according to the operation information of the substation, sets the energy storage capacity and charging and discharging strategy for the energy storage facility connected to the substation; and performs simulation calculation on the substation connected to the energy storage facility to obtain the load peak-valley difference and the main transformer load rate after the storage configuration; finally, the load peak-valley difference and the main transformer load rate before the storage configuration, the load peak-valley difference and the main transformer load rate after the storage configuration are analyzed to determine the storage configuration effect of the substation. In this way, on the basis of configuring the energy storage capacity and charging and discharging strategy that match the operation information of the substation, the data (load peak-valley difference and daily main transformer load rate) before and after the storage configuration of the substation to be configured with energy storage connected to the energy storage facility are analyzed to determine the storage configuration effect of the substation. In this way, on the one hand, the operation information based on the substation is given to determine the energy storage capacity and charging and discharging strategy of the energy storage facilities connected to the substation, which can provide a more reasonable storage allocation plan for the substation; on the other hand, by analyzing the daily load data before and after the substation is connected to the energy storage facility, it is possible to start from the grid side, match the energy storage configuration plan for the substation and analyze whether the corresponding energy storage effect is reasonable, so as to alleviate the existing energy storage problems of the substation.

[0156] Embodiment 2:

[0157] Based on the same inventive concept, the embodiment of the present invention also provides a system for analyzing the effect of configuring energy storage in a substation, see Figure 5 FIG. 5 is a schematic diagram of a system for analyzing the effect of configuring energy storage in a substation according to an embodiment of the present invention. The system 500 includes:

[0158] The first analysis module 501 is used to analyze the load time series data of the substation to be configured with energy storage the day before the energy storage is configured, and obtain the load peak-to-valley difference and the main transformer load rate of the day before the energy storage is configured;

[0159] A setting module 502, configured to set energy storage capacity and charging and discharging strategies for energy storage facilities connected to the substation according to the operation information of the substation;

[0160] A simulation calculation module 503 is used to perform simulation calculation on the substation connected to the energy storage facility to obtain the peak-to-valley difference of the daily load after the energy storage is allocated and the daily main transformer load rate after the energy storage is allocated;

[0161] The second analysis module 504 is used to analyze the load peak-to-valley difference on the day before the storage configuration, the main transformer load rate on the day before the storage configuration, the load peak-to-valley difference on the day after the storage configuration, and the main transformer load rate on the day after the storage configuration to determine the storage configuration effect of the substation.

[0162] In some embodiments of the present invention, the setting module 502 includes:

[0163] An acquisition unit, used for acquiring the number of main transformers of the substation, the capacity of a single main transformer, the maximum load, and the peak and valley periods of electricity consumption of the substation in daily from the operation information;

[0164] a calculation unit, configured to calculate the number of main transformers, the capacity of a single main transformer, and the maximum load according to an energy storage capacity calculation formula to generate the energy storage capacity;

[0165] The analysis unit is used to analyze the load characteristic curve of the substation during the daily peak and valley periods of electricity consumption and the load time series data of the previous day of distribution and storage, so as to obtain the charging and discharging strategy.

[0166] In some embodiments of the present invention, the second analysis module 504 includes:

[0167] A difference acquisition unit, used to acquire the peak-to-valley difference between the load peak-to-valley difference on the day after the storage allocation and the load peak-to-valley difference on the day before the storage allocation, and the load rate difference between the main transformer load rate on the day after the storage allocation and the main transformer load rate on the day before the storage allocation;

[0168] A first judgment unit is used to determine that the storage allocation effect is a storage allocation success if the peak-to-valley difference is greater than a first preset difference and the load rate difference is greater than a second preset difference;

[0169] The second judgment unit is used to determine that the storage effect is a storage failure if the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference.

[0170] In some embodiments of the present invention, after executing the steps corresponding to the first judgment unit, the system 500 also includes: a display module, which is used to superimpose and display the load characteristic curve of the day before the storage configuration corresponding to the load time series data of the day before the storage configuration, the load characteristic curve of the day after the storage configuration corresponding to the load time series data after the storage configuration, and the energy storage characteristic curve generated based on the energy storage capacity and the charging and discharging strategy.

[0171] In some embodiments of the present invention, after executing the steps corresponding to the second judgment unit, the system 500 also includes: a re-adjustment module, which is used to adjust the energy storage capacity and the charging and discharging strategy of the energy storage facility connected to the substation, respectively, to obtain the adjusted energy storage facility; simulate and calculate the substation connected to the adjusted energy storage facility, to obtain the daily load peak-to-valley difference after the adjustment of the distribution and storage, and the daily main transformer load rate after the adjustment of the distribution and storage; analyze the daily load peak-to-valley difference before the distribution and storage, the daily main transformer load rate before the distribution and storage, the daily load peak-to-valley difference after the adjustment of the distribution and storage, and the daily main transformer load rate after the adjustment of the distribution and storage, and re-determine the distribution and storage effect of the substation.

[0172] In some embodiments of the present invention, the system 500 also includes: a determination module, which is used to select areas with difficulty in consuming new energy, areas with large peak-to-valley differences and overloads during peak loads, and areas with insufficient power supply capacity of the power grid within the power grid area; and determine the substations in the areas with difficulty in consuming new energy, the areas with large peak-to-valley differences and overloads during peak loads, and the areas with insufficient power supply capacity of the power grid as the substations to be configured with energy storage.

[0173] In some embodiments of the present invention, the first analysis module 501 is specifically used to read the daily load maximum value and the daily load minimum value from the load time series data of the day before the distribution and storage, and calculate the average value of the load time series data of the day before the distribution and storage to obtain the daily average load power; the difference between the daily load maximum value and the daily load minimum value is determined as the peak-to-valley difference of the load on the day before the distribution and storage; the percentage between the daily average load power and the rated capacity of the main transformer of the substation is determined as the load rate of the main transformer on the day before the distribution and storage.

[0174] It should be noted that the description of the effect analysis system for configuring energy storage in a substation is similar to the description of the effect analysis method embodiment for configuring energy storage in a substation, and has similar beneficial effects as the effect analysis method embodiment for configuring energy storage in a substation. For technical details not disclosed in the system side embodiment of the present invention, please refer to the description of the method embodiment of the present invention for understanding.

[0175] Embodiment 3:

[0176] Based on the same inventive concept, Figure 6As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor 610, a memory 620, a transceiver component 630, etc. The processor 610, the memory 620 and the transceiver component 630 are connected via a bus 640; the memory 620 can be used to store an execution program, and an exemplary execution program may include instructions; the processor 610 is used to execute the instructions stored in the memory. The memory 620 can also be used to store data, which can be called and / or modified when executing instructions.

[0177] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement a corresponding method flow or a corresponding function, so as to realize a method for analyzing the effect of configuring energy storage in a substation in the above embodiment.

[0178] Embodiment 4:

[0179] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in electronic devices and, of course, extended storage media supported by electronic devices. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium to implement a method for analyzing the effect of configuring energy storage in a substation in the above embodiment.

[0180] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0181] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0182] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0183] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for analyzing the effect of configuring energy storage in a substation, characterized in that: The method comprises: Analyze the load time series data of the substation to be equipped with energy storage the day before the energy storage is deployed, and obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is deployed; According to the operation information of the substation, setting the energy storage capacity and charging and discharging strategy for the energy storage facilities connected to the substation; Perform simulation calculation on the substation connected to the energy storage facility to obtain the daily load peak-to-valley difference and the daily main transformer load rate after storage; The peak-to-valley difference of the load on the day before the storage, the load rate of the main transformer on the day before the storage, the peak-to-valley difference of the load on the day after the storage, and the load rate of the main transformer on the day after the storage are analyzed to determine the storage effect of the substation.

2. The method according to claim 1, characterized in that The step of setting the energy storage capacity and the charging and discharging strategy for the energy storage facility connected to the substation according to the operation information of the substation includes: From the operation information, the number of main transformers of the substation, the capacity of a single main transformer, the maximum load, and the peak and valley periods of electricity consumption of the substation in each day are obtained; According to the energy storage capacity calculation formula, the number of main transformers, the capacity of a single main transformer and the maximum load are calculated to generate the energy storage capacity; The substation's daily peak and valley periods, and the storage load characteristic curve corresponding to the storage load time series data of the previous day are analyzed to obtain the charging and discharging strategy.

3. The method according to claim 1, characterized in that: The analyzing the load peak-to-valley difference on the day before the storage allocation, the main transformer load rate on the day before the storage allocation, the load peak-to-valley difference on the day after the storage allocation, and the main transformer load rate on the day after the storage allocation to determine the storage allocation effect of the substation includes: Obtaining the peak-to-valley difference between the peak-to-valley difference of the load on the day after the storage allocation and the peak-to-valley difference of the load on the day before the storage allocation, and the load rate difference between the main transformer load rate on the day after the storage allocation and the main transformer load rate on the day before the storage allocation; If the peak-to-valley difference is greater than the first preset difference, and the load rate difference is greater than the second preset difference, then the storage allocation effect is determined to be a storage allocation success; If the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference, it is determined that the storage allocation effect is a storage allocation failure.

4. The method according to claim 3, characterized in that If the peak-to-valley difference is greater than the first preset difference, and the load rate difference is greater than the second preset difference, then after determining that the storage allocation effect is successful, the method further includes: The load characteristic curve of the day before storage corresponding to the load time series data of the day before storage, the load characteristic curve of the day after storage corresponding to the load time series data after storage, and the energy storage characteristic curve generated based on the energy storage capacity and the charging and discharging strategy are superimposed and displayed.

5. The method according to claim 3, characterized in that: If the peak-to-valley difference is less than or equal to the first preset difference, and / or the load rate difference is less than or equal to the second preset difference, then after determining that the storage allocation effect is a storage allocation failure, the method further includes: The energy storage capacity and the charging and discharging strategy of the energy storage facility connected to the substation are adjusted respectively to obtain the adjusted energy storage facility; Performing simulation calculation on the substation connected to the adjusted energy storage facility to obtain the daily load peak-to-valley difference after the adjustment of the distribution and storage, and the daily main transformer load rate after the adjustment of the distribution and storage; The peak-to-valley difference of the load on the day before the storage and allocation, the load rate of the main transformer on the day before the storage and allocation, the peak-to-valley difference of the load on the day after the storage and allocation adjustment, and the load rate of the main transformer on the day after the storage and allocation adjustment are analyzed to determine the storage and allocation effect of the substation again.

6. The method according to claim 1, characterized in that Before analyzing the load time series data of the substation to be configured with energy storage the day before the energy storage is configured to obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is configured, the method further includes: Select areas in the power grid area where it is difficult to absorb new energy, areas with large peak-to-valley differences and overload during peak loads, and areas where the power grid has insufficient power supply capacity; Substations in the areas where it is difficult to consume new energy, in the areas where the peak-to-valley difference is large and the load is overloaded during peak hours, and in the areas where the power supply capacity of the power grid is insufficient are determined as the substations to be configured with energy storage.

7. The method according to claim 1, characterized in that The load time series data of the substation to be configured with energy storage is analyzed the day before the energy storage is configured to obtain the load peak-to-valley difference and the main transformer load rate the day before the energy storage is configured, including: Reading the maximum and minimum daily load values ​​from the load time series data of the day before the storage allocation, and calculating the average value of the load time series data of the day before the storage allocation to obtain the daily average load power; The difference between the maximum daily load and the minimum daily load is determined as the peak-to-valley difference of the daily load before storage allocation; The percentage between the daily average load power and the rated capacity of the main transformer of the substation is determined as the main transformer load rate on the day before storage allocation.

8. A system for analyzing the effect of energy storage configuration in a substation, characterized in that: The system comprises: The first analysis module is used to analyze the load time series data of the substation to be configured with energy storage the day before the energy storage is configured, and obtain the load peak-to-valley difference and the main transformer load rate of the day before the energy storage is configured; A setting module, used to set energy storage capacity and charging and discharging strategies for energy storage facilities connected to the substation according to operation information of the substation; A simulation calculation module is used to perform simulation calculation on the substation connected to the energy storage facility to obtain the peak-to-valley difference of the daily load after the storage is allocated and the load rate of the main transformer after the storage is allocated; The second analysis module is used to analyze the load peak-to-valley difference on the day before the storage configuration, the main transformer load rate on the day before the storage configuration, the load peak-to-valley difference on the day after the storage configuration, and the main transformer load rate on the day after the storage configuration to determine the storage configuration effect of the substation.

9. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the method for analyzing the effect of configuring energy storage in a substation as described in any one of claims 1 to 7 is implemented.

10. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, the effect analysis method of configuring energy storage in a substation as described in any one of claims 1 to 7 is implemented.

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