A flexible interconnected energy storage system and control method, system and medium thereof

Abstract

The present application provides a flexible interconnected energy storage system and its control method, system and medium. The method includes: collecting power distribution monitoring information of a preset area within a preset time period and system monitoring information of a substation energy storage system, respectively extracting power consumption dynamic data and system power supply dynamic data, processing to obtain a power balance index, obtaining device characteristic data and operation characteristic data of the substation energy storage system, processing to obtain an energy utilization index, extracting device characteristic data of the substation energy storage system according to the device characteristic data, and processing in combination with external environment characteristic data to obtain a responsiveness index, processing according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capacity effect index, and comparing it with a preset dispatching capacity effect threshold, and judging whether the power distribution control capability of the substation energy storage system is reliable, and making corresponding adjustments, thereby realizing a flexible interconnected energy storage system and its control technology.

Description

Technical Field

[0001] The present application relates to the field of flexible interconnected energy storage technology, and more specifically, to a flexible interconnected energy storage system and a control method, system and medium thereof. Background Art

[0002] With the rapid development of my country's economy, the demand for industrial and residential electricity is increasing, especially during peak hours, the problem of tight electricity supply is becoming increasingly prominent.

[0003] At the same time, there will be problems such as unbalanced three-phase load in the substation, equipment overload, increased risk of power outages, and increased harmonic content in the power grid. Therefore, it is necessary to improve the dispatching capacity of the substation energy storage system.

[0004] In view of the above problems, effective technical solutions are urgently needed. Summary of the invention

[0005] The purpose of the present application is to provide a flexible interconnected energy storage system and its control method, system and medium, which can further process the obtained power balance index, energy utilization index and responsiveness index to obtain the dispatching capacity effect index of the substation energy storage system, and judge whether the distribution control capability of the substation energy storage system is reliable based on this, and make corresponding adjustments to realize the technology of flexible interconnected energy storage system and its control.

[0006] The present application also provides a flexible interconnected energy storage system and a control method thereof, comprising the following steps:

[0007] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0008] Extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index;

[0009] Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and process and obtain an energy utilization index;

[0010] Extracting device characteristic data according to the device characteristic data, and processing the data in combination with external environment characteristic data to obtain a responsiveness index;

[0011] Processing is performed according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index;

[0012] A threshold comparison is performed based on the dispatching capability effect index and a preset dispatching capability effect threshold, and whether the power distribution control capability of the substation energy storage system is reliable is determined based on the comparison result, and corresponding adjustments are made.

[0013] Optionally, in the flexible interconnected energy storage system and control method thereof described in the present application, the collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of the substation energy storage system includes:

[0014] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0015] The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information;

[0016] The system monitoring information includes energy storage device parameter information and line parameter information.

[0017] Optionally, in the flexible interconnected energy storage system and control method thereof described in the present application, respectively extracting power consumption dynamic data and system power supply dynamic data according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index, includes:

[0018] Extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data;

[0019] Extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data, and line impedance data;

[0020] The active load power data, reactive load power data and load change rate data are processed in combination with the energy storage capacity data, charge and discharge power data and line impedance data to obtain a power balance index of the substation energy storage system.

[0021] Optionally, in the flexible interconnected energy storage system and control method thereof described in the present application, the step of acquiring the equipment characteristic data and operation characteristic data of the substation energy storage system and processing to obtain the energy utilization index includes:

[0022] Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area;

[0023] The device characteristic data includes charge and discharge efficiency data and self-discharge rate data;

[0024] The operation characteristic data includes charge and discharge depth data and charge and discharge rate data;

[0025] The energy utilization index of the substation energy storage system is obtained by processing the charge and discharge efficiency data and the self-discharge rate data in combination with the charge and discharge depth data and the charge and discharge rate data.

[0026] Optionally, in the flexible interconnected energy storage system and control method thereof described in the present application, the extracting device characteristic data according to the device characteristic data and processing it in combination with the external environment characteristic data to obtain the responsiveness index includes:

[0027] Extracting device characteristic data of the energy storage system in the substation according to the device characteristic data, including power density data, energy density data and charge and discharge rate data;

[0028] Obtain external environment characteristic data, including the equipment's operating temperature data and operating humidity data;

[0029] The power density data, energy density data and charge and discharge rate data are processed in combination with the working temperature data and the working humidity data to obtain the responsiveness index of the substation energy storage system.

[0030] Optionally, in the flexible interconnected energy storage system and control method thereof described in the present application, the processing according to the power balance index, the energy utilization index and the responsiveness index to obtain the deployment capability effect index includes:

[0031] According to the power balance index, energy utilization index and responsiveness index, a preset distribution energy storage evaluation model is used to process and obtain a dispatching capability effect index of the substation energy storage system;

[0032] The calculation formula of the deployment capability effect index is:

[0033] ;

[0034] in, is the energy storage supply deviation index, , , They are power balance index, energy utilization index and responsiveness index respectively. , , , is the preset characteristic coefficient.

[0035] In a second aspect, the present application provides a flexible interconnected energy storage system and a control system thereof, the system comprising: a memory and a processor, the memory comprising a program of the flexible interconnected energy storage system and a control method thereof, and the program of the flexible interconnected energy storage system and a control method thereof is executed by the processor to implement the following steps:

[0036] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0037] Extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index;

[0038] Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and process and obtain an energy utilization index;

[0039] Extracting device characteristic data according to the device characteristic data, and processing the data in combination with external environment characteristic data to obtain a responsiveness index;

[0040] Processing is performed according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index;

[0041] A threshold comparison is performed based on the dispatching capability effect index and a preset dispatching capability effect threshold, and whether the power distribution control capability of the substation energy storage system is reliable is determined based on the comparison result, and corresponding adjustments are made.

[0042] Optionally, in the flexible interconnected energy storage system and control system thereof described in the present application, the collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of the substation energy storage system includes:

[0043] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0044] The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information;

[0045] The system monitoring information includes energy storage device parameter information and line parameter information.

[0046] Optionally, in the flexible interconnected energy storage system and control system thereof described in the present application, respectively extracting power consumption dynamic data and system power supply dynamic data according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index, includes:

[0047] Extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data;

[0048] Extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data, and line impedance data;

[0049] The active load power data, reactive load power data and load change rate data are processed in combination with the energy storage capacity data, charge and discharge power data and line impedance data to obtain a power balance index of the substation energy storage system.

[0050] In a third aspect, the present application also provides a computer-readable storage medium, which stores a flexible interconnected energy storage system and a control method program thereof. When the flexible interconnected energy storage system and a control method program thereof are executed by a processor, the steps of the flexible interconnected energy storage system and a control method thereof as described in any one of the above items are implemented.

[0051] As can be seen from the above, the flexible interconnected energy storage system and its control method, system and medium provided by the present application, by collecting the power distribution monitoring information of the preset area within the preset time period and the system monitoring information of the substation energy storage system, extracting the dynamic power consumption data according to the power distribution monitoring information, extracting the system power supply dynamic data according to the system monitoring information, processing the dynamic power consumption data and the system power supply dynamic data, obtaining the power balance index of the substation energy storage system, obtaining the equipment characteristic data and the operation characteristic data of the substation energy storage system, processing to obtain the energy utilization index, extracting the equipment characteristic data of the substation energy storage system according to the equipment characteristic data, and processing in combination with the external environment characteristic data to obtain the responsiveness index of the substation energy storage system, processing according to the power balance index, the energy utilization index and the responsiveness index to obtain the dispatching capacity effect index of the substation energy storage system, and performing a threshold comparison with the preset dispatching capacity effect threshold, judging whether the power distribution control capability of the substation energy storage system is reliable according to the comparison result, and making corresponding adjustments, thereby realizing the technology of flexible interconnected energy storage system and its control.

[0052] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A flow chart of a flexible interconnected energy storage system and a control method thereof provided in an embodiment of the present application;

[0055] Figure 2 A flow chart of obtaining a power balance index for a flexible interconnected energy storage system and a control method thereof provided in an embodiment of the present application;

[0056] Figure 3 A flow chart of obtaining an energy utilization index for a flexible interconnected energy storage system and a control method thereof provided in an embodiment of the present application;

[0057] Figure 4 A flow chart of obtaining a responsiveness index for a flexible interconnected energy storage system and a control method thereof provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions 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 a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0059] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0060] Please refer to Figure 1 , Figure 1 The following is a flow chart of a flexible interconnected energy storage system and a control method thereof in some embodiments of the present application. The flexible interconnected energy storage system and a control method thereof are used in terminal devices, such as computers, mobile phone terminals, etc. The flexible interconnected energy storage system and a control method thereof include the following steps:

[0061] S11, collecting power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation;

[0062] S12, extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index;

[0063] S13, obtaining equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and processing to obtain an energy utilization index;

[0064] S14, extracting device characteristic data according to the device characteristic data, and processing the data in combination with the external environment characteristic data to obtain a responsiveness index;

[0065] S15, performing processing according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index;

[0066] S16. Perform a threshold comparison between the dispatching capability effect index and a preset dispatching capability effect threshold, determine whether the power distribution control capability of the substation energy storage system is reliable based on the comparison result, and make corresponding adjustments.

[0067] It should be noted that with the rapid development of my country's economy, the demand for industrial and residential electricity is increasing, especially during peak hours, the problem of tight power supply is becoming increasingly prominent. At the same time, there will be problems such as unbalanced three-phase load in the substation, equipment overload, increased risk of power outages, and increased harmonic content in the power grid. Therefore, it is necessary to improve the dispatching capacity of the substation energy storage system. First, by collecting the distribution monitoring information of the preset area within the preset time period and the system monitoring information of the substation energy storage system, extract the power consumption dynamic data according to the distribution monitoring information, extract the system power supply dynamic data according to the system monitoring information, and process the power consumption dynamic data and the system power supply dynamic data to obtain the substation area. The power balance index of the energy storage system is obtained, the equipment characteristic data and operation characteristic data of the substation energy storage system are obtained, and the energy utilization index is obtained by processing. The equipment characteristic data of the substation energy storage system is extracted according to the equipment characteristic data, and the data is processed in combination with the external environment characteristic data to obtain the responsiveness index of the substation energy storage system. According to the power balance index, energy utilization index and responsiveness index, the dispatching capacity effect index of the substation energy storage system is obtained, and the threshold is compared with the preset dispatching capacity effect threshold. According to the comparison result, it is judged whether the distribution control capability of the substation energy storage system is reliable, and corresponding adjustments are made, thereby realizing the technology of flexible interconnected energy storage system and its control.

[0068] According to an embodiment of the present invention, the collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of an energy storage system in a substation area includes:

[0069] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0070] The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information;

[0071] The system monitoring information includes energy storage device parameter information and line parameter information.

[0072] It should be noted that before processing the data, it is necessary to first collect the power distribution monitoring information of the preset area within the preset time period and the system monitoring information of the substation energy storage system, where the power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information, and the system monitoring information includes energy storage equipment parameter information and line parameter information.

[0073] Please refer to Figure 2 , Figure 2 The flowchart of obtaining the power balance index of the flexible interconnected energy storage system and the control method thereof in some embodiments of the present application. According to the embodiment of the present invention, the power consumption dynamic data and the system power supply dynamic data are respectively extracted according to the power distribution monitoring information and the system monitoring information, and the power balance index is obtained by processing, including:

[0074] S21, extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data;

[0075] S22, extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data and line impedance data;

[0076] S23. Processing the active load power data, reactive load power data and load change rate data in combination with the energy storage capacity data, charge and discharge power data and line impedance data to obtain a power balance index of the substation energy storage system.

[0077] It should be noted that in order to evaluate the power balance regulation level of the substation, it is necessary to extract the power consumption dynamic data based on the electrical parameter information, the load side parameter information and the power supply side parameter information, and extract the system power supply dynamic data based on the energy storage device parameter information and the line parameter information. The power consumption dynamic data includes the active load power data, reactive load power data and load change rate data of the substation energy storage system. The load change rate refers to the speed of change of the load power over time. The system power supply dynamic data includes the energy storage capacity data, charging and discharging power data and line impedance data of the substation energy storage system. Then, the above data are processed to obtain the power balance index of the substation energy storage system.

[0078] The calculation formula of the power balance index is:

[0079] ;

[0080] in, is the power balance index, , , They are active load power data, reactive load power data, and load change rate data. , , They are energy storage capacity data, charge and discharge power data, and line impedance data. , , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0081] Please refer to Figure 3 , Figure 3 The flowchart of obtaining the energy utilization index of the flexible interconnected energy storage system and the control method thereof in some embodiments of the present application. According to the embodiment of the present invention, the device characteristic data and operation characteristic data of the substation energy storage system are obtained, and the energy utilization index is obtained by processing, including:

[0082] S31, obtaining equipment characteristic data and operation characteristic data of the energy storage system in the substation;

[0083] S32, the device characteristic data includes charge and discharge efficiency data and self-discharge rate data;

[0084] S33, the operation characteristic data includes charge and discharge depth data and charge and discharge rate data;

[0085] S34, according to the charging and discharging efficiency data and the self-discharge rate data, combined with the charging and discharging depth data and the charging and discharging rate data, the energy utilization index of the substation energy storage system is obtained.

[0086] It should be noted that energy utilization is one of the important indicators of the substation energy storage system. Therefore, improving energy utilization will affect its deployment capacity. First, the equipment characteristic data and operation characteristic data of the substation energy storage system are obtained. The equipment characteristic data include the charge and discharge efficiency data and self-discharge rate data of the energy storage equipment. The self-discharge rate refers to the rate of energy loss of the energy storage equipment in a static state. The operation characteristic data includes the charge and discharge depth data and charge and discharge rate data of the energy storage equipment. The charge and discharge depth refers to the proportion of the capacity actually used by the energy storage equipment during the charge and discharge process to the total capacity. Then, the above data are processed to obtain the energy utilization index of the substation energy storage system.

[0087] The calculation formula of the energy utilization index is:

[0088] ;

[0089] in, is the energy utilization index, , They are charge and discharge efficiency data and self-discharge rate data respectively. , They are charge and discharge depth data and charge and discharge rate data respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0090] Please refer to Figure 4 , Figure 4 The flowchart of obtaining the responsiveness index of the flexible interconnected energy storage system and the control method thereof in some embodiments of the present application. According to the embodiment of the present invention, the device characteristic data is extracted according to the device characteristic data, and the responsiveness index is obtained by processing the device characteristic data in combination with the external environment characteristic data, including:

[0091] S41, extracting device characteristic data of the energy storage system in the substation according to the device characteristic data, including power density data, energy density data and charge and discharge rate data;

[0092] S42, obtaining external environment characteristic data, including operating temperature data and operating humidity data of the device;

[0093] S43, processing the power density data, energy density data and charge and discharge rate data in combination with the operating temperature data and the operating humidity data to obtain a responsiveness index of the substation energy storage system.

[0094] It should be noted that, similarly, improving the response speed of the substation energy storage system can also correspondingly improve its deployment capacity. Therefore, the equipment characteristic data of the substation energy storage system is extracted based on the equipment characteristic data, including the power density data, energy density data and charge and discharge rate data of the substation energy storage system, wherein the charge and discharge rate refers to the charge and discharge rate indicating the ratio of the amount of electricity that can be charged or discharged by the energy storage device per unit time to the rated capacity. In addition, the external environment characteristic data including the working temperature and humidity are obtained, and then the above data are processed to obtain the responsiveness index of the substation energy storage system;

[0095] The calculation formula of the responsiveness index is:

[0096] ;

[0097] in, is the responsiveness index, , , They are rate density data, energy density data, and charge and discharge rate data. , They are working temperature data and working humidity data respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0098] According to an embodiment of the present invention, the processing according to the power balance index, the energy utilization index and the responsiveness index to obtain the deployment capability effect index includes:

[0099] According to the power balance index, energy utilization index and responsiveness index, a preset distribution energy storage evaluation model is used to process and obtain a dispatching capability effect index of the substation energy storage system;

[0100] The calculation formula of the deployment capability effect index is:

[0101] ;

[0102] in, is the energy storage supply deviation index, , , They are power balance index, energy utilization index and responsiveness index respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0103] It should be noted that in order to evaluate whether the dispatching capacity of the substation energy storage system is reliable, it is necessary to process the power balance index, energy utilization index and responsiveness index through the calculation formula of the preset distribution energy storage evaluation model to obtain the dispatching capacity effect index of the substation energy storage system.

[0104] According to an embodiment of the present invention, it also includes:

[0105] Obtaining total power consumption data, total power data, maximum power demand data, and voltage fluctuation data of the area;

[0106] Processing the total power consumption data, the total power data, the maximum power demand data, and the voltage fluctuation data to obtain a regional power demand index;

[0107] Performing a threshold comparison between the regional electricity demand index and a preset regional electricity demand threshold, and charging or discharging the regional energy storage system according to the threshold comparison result;

[0108] If the threshold comparison result is less than a first preset threshold, charging the energy storage system in the substation;

[0109] If the threshold comparison result is greater than a second preset threshold, discharging the energy storage system in the station area;

[0110] The calculation formula of the regional electricity demand index is:

[0111] ;

[0112] in, is the regional electricity demand index, , , , They are total power consumption data, total power data, maximum power demand data, and voltage fluctuation data. , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0113] It should be noted that in order to achieve peak shaving and valley filling and reduce electricity consumption during peak hours, it is necessary to obtain the total electricity consumption data, total power data, maximum electricity demand data and voltage fluctuation data of the region, and process the above data to obtain the regional electricity demand index, and then compare the regional electricity demand index with the preset threshold, and judge whether the regional electricity consumption is peak or valley based on the comparison result. During the peak period, the substation energy storage system is discharged, and during the valley period, the substation energy storage system is charged, thereby achieving peak shaving and valley filling.

[0114] In a second aspect, the present invention further discloses a flexible interconnected energy storage system and a control system thereof, comprising a memory and a processor, wherein the memory comprises a flexible interconnected energy storage system and a control method program thereof, and when the flexible interconnected energy storage system and the control method program thereof are executed by the processor, the following steps are implemented:

[0115] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0116] Extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index;

[0117] Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and process and obtain an energy utilization index;

[0118] Extracting device characteristic data according to the device characteristic data, and processing the data in combination with external environment characteristic data to obtain a responsiveness index;

[0119] Processing is performed according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index;

[0120] A threshold comparison is performed based on the dispatching capability effect index and a preset dispatching capability effect threshold, and whether the power distribution control capability of the substation energy storage system is reliable is determined based on the comparison result, and corresponding adjustments are made.

[0121] It should be noted that with the rapid development of my country's economy, the demand for industrial and residential electricity is increasing, especially during peak hours, the problem of tight power supply is becoming increasingly prominent. At the same time, there will be problems such as unbalanced three-phase load in the substation, equipment overload, increased risk of power outages, and increased harmonic content in the power grid. Therefore, it is necessary to improve the dispatching capacity of the substation energy storage system. First, by collecting the distribution monitoring information of the preset area within the preset time period and the system monitoring information of the substation energy storage system, extract the power consumption dynamic data according to the distribution monitoring information, extract the system power supply dynamic data according to the system monitoring information, and process the power consumption dynamic data and the system power supply dynamic data to obtain the substation area. The power balance index of the energy storage system is obtained, the equipment characteristic data and operation characteristic data of the substation energy storage system are obtained, and the energy utilization index is obtained by processing. The equipment characteristic data of the substation energy storage system is extracted according to the equipment characteristic data, and the data is processed in combination with the external environment characteristic data to obtain the responsiveness index of the substation energy storage system. According to the power balance index, energy utilization index and responsiveness index, the dispatching capacity effect index of the substation energy storage system is obtained, and the threshold is compared with the preset dispatching capacity effect threshold. According to the comparison result, it is judged whether the distribution control capability of the substation energy storage system is reliable, and corresponding adjustments are made, thereby realizing the technology of flexible interconnected energy storage system and its control.

[0122] According to an embodiment of the present invention, the collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of an energy storage system in a substation area includes:

[0123] Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area;

[0124] The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information;

[0125] The system monitoring information includes energy storage device parameter information and line parameter information.

[0126] It should be noted that before processing the data, it is necessary to first collect the power distribution monitoring information of the preset area within the preset time period and the system monitoring information of the substation energy storage system, where the power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information, and the system monitoring information includes energy storage equipment parameter information and line parameter information.

[0127] According to an embodiment of the present invention, extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index includes:

[0128] Extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data;

[0129] Extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data, and line impedance data;

[0130] The active load power data, reactive load power data and load change rate data are processed in combination with the energy storage capacity data, charge and discharge power data and line impedance data to obtain a power balance index of the substation energy storage system.

[0131] It should be noted that in order to evaluate the power balance regulation level of the substation, it is necessary to extract the power consumption dynamic data based on the electrical parameter information, the load side parameter information and the power supply side parameter information, and extract the system power supply dynamic data based on the energy storage device parameter information and the line parameter information. The power consumption dynamic data includes the active load power data, reactive load power data and load change rate data of the substation energy storage system. The load change rate refers to the speed of change of the load power over time. The system power supply dynamic data includes the energy storage capacity data, charging and discharging power data and line impedance data of the substation energy storage system. Then, the above data are processed to obtain the power balance index of the substation energy storage system.

[0132] The calculation formula of the power balance index is:

[0133] ;

[0134] in, is the power balance index, , , They are active load power data, reactive load power data, and load change rate data. , , They are energy storage capacity data, charge and discharge power data, and line impedance data. , , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0135] According to an embodiment of the present invention, the step of acquiring the equipment characteristic data and the operation characteristic data of the substation energy storage system and processing to obtain the energy utilization index includes:

[0136] Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area;

[0137] The device characteristic data includes charge and discharge efficiency data and self-discharge rate data;

[0138] The operation characteristic data includes charge and discharge depth data and charge and discharge rate data;

[0139] The energy utilization index of the substation energy storage system is obtained by processing the charge and discharge efficiency data and the self-discharge rate data in combination with the charge and discharge depth data and the charge and discharge rate data.

[0140] It should be noted that energy utilization is one of the important indicators of the substation energy storage system. Therefore, improving energy utilization will affect its deployment capacity. First, the equipment characteristic data and operation characteristic data of the substation energy storage system are obtained. The equipment characteristic data include the charge and discharge efficiency data and self-discharge rate data of the energy storage equipment. The self-discharge rate refers to the rate of energy loss of the energy storage equipment in a static state. The operation characteristic data includes the charge and discharge depth data and charge and discharge rate data of the energy storage equipment. The charge and discharge depth refers to the proportion of the capacity actually used by the energy storage equipment during the charge and discharge process to the total capacity. Then, the above data are processed to obtain the energy utilization index of the substation energy storage system.

[0141] The calculation formula of the energy utilization index is:

[0142] ;

[0143] in, is the energy utilization index, , They are charge and discharge efficiency data and self-discharge rate data respectively. , They are charge and discharge depth data and charge and discharge rate data respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0144] According to an embodiment of the present invention, extracting device characteristic data according to the device characteristic data and processing it in combination with external environment characteristic data to obtain a responsiveness index includes:

[0145] Extracting device characteristic data of the energy storage system in the substation according to the device characteristic data, including power density data, energy density data and charge and discharge rate data;

[0146] Obtain external environment characteristic data, including the equipment's operating temperature data and operating humidity data;

[0147] The power density data, energy density data and charge and discharge rate data are processed in combination with the working temperature data and the working humidity data to obtain the responsiveness index of the substation energy storage system.

[0148] It should be noted that, similarly, improving the response speed of the substation energy storage system can also correspondingly improve its deployment capacity. Therefore, the equipment characteristic data of the substation energy storage system is extracted based on the equipment characteristic data, including the power density data, energy density data and charge and discharge rate data of the substation energy storage system, wherein the charge and discharge rate refers to the charge and discharge rate indicating the ratio of the amount of electricity that can be charged or discharged by the energy storage device per unit time to the rated capacity. In addition, the external environment characteristic data including the working temperature and humidity are obtained, and then the above data are processed to obtain the responsiveness index of the substation energy storage system;

[0149] The calculation formula of the responsiveness index is:

[0150] ;

[0151] in, is the responsiveness index, , , They are rate density data, energy density data, and charge and discharge rate data. , They are working temperature data and working humidity data respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0152] According to an embodiment of the present invention, the processing according to the power balance index, the energy utilization index and the responsiveness index to obtain the deployment capability effect index includes:

[0153] According to the power balance index, energy utilization index and responsiveness index, a preset distribution energy storage evaluation model is used to process and obtain a dispatching capability effect index of the substation energy storage system;

[0154] The calculation formula of the deployment capability effect index is:

[0155] ;

[0156] in, is the energy storage supply deviation index, , , They are power balance index, energy utilization index and responsiveness index respectively. , , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0157] It should be noted that in order to evaluate whether the dispatching capacity of the substation energy storage system is reliable, it is necessary to process the power balance index, energy utilization index and responsiveness index through the calculation formula of the preset distribution energy storage evaluation model to obtain the dispatching capacity effect index of the substation energy storage system.

[0158] According to an embodiment of the present invention, it also includes:

[0159] Obtaining total power consumption data, total power data, maximum power demand data, and voltage fluctuation data of the area;

[0160] Processing the total power consumption data, the total power data, the maximum power demand data, and the voltage fluctuation data to obtain a regional power demand index;

[0161] Performing a threshold comparison between the regional electricity demand index and a preset regional electricity demand threshold, and charging or discharging the substation energy storage system according to the threshold comparison result;

[0162] If the threshold comparison result is less than a first preset threshold, charging the energy storage system in the substation;

[0163] If the threshold comparison result is greater than a second preset threshold, discharging the energy storage system in the station area;

[0164] The calculation formula of the regional electricity demand index is:

[0165] ;

[0166] in, is the regional electricity demand index, , , , They are total power consumption data, total power data, maximum power demand data, and voltage fluctuation data. , , It is the preset characteristic coefficient (the characteristic coefficient is obtained by querying the preset substation energy storage monitoring platform database).

[0167] It should be noted that in order to achieve peak shaving and valley filling and reduce electricity consumption during peak hours, it is necessary to obtain the total electricity consumption data, total power data, maximum electricity demand data and voltage fluctuation data of the region, and process the above data to obtain the regional electricity demand index, and then compare the regional electricity demand index with the preset threshold, and judge whether the regional electricity consumption is peak or valley based on the comparison result. During the peak period, the substation energy storage system is discharged, and during the valley period, the substation energy storage system is charged, thereby achieving peak shaving and valley filling.

[0168] A third aspect of the present invention provides a readable storage medium, which stores a program for a flexible interconnected energy storage system and a control method thereof. When the program for the flexible interconnected energy storage system and a control method thereof is executed by a processor, the steps of the flexible interconnected energy storage system and a control method thereof as described in any one of the above items are implemented.

[0169] The flexible interconnected energy storage system and its control method, system and medium disclosed in the present invention collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of a substation energy storage system, extract power consumption dynamic data according to the power distribution monitoring information, extract system power supply dynamic data according to the system monitoring information, process the power consumption dynamic data and the system power supply dynamic data to obtain a power balance index of the substation energy storage system, obtain equipment characteristic data and operation characteristic data of the substation energy storage system, process to obtain an energy utilization index, extract equipment characteristic data of the substation energy storage system according to the equipment characteristic data, and process in combination with external environment characteristic data to obtain a responsiveness index of the substation energy storage system, process according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capacity effect index of the substation energy storage system, and compare the threshold with the preset dispatching capacity effect threshold, judge whether the power distribution control capability of the substation energy storage system is reliable according to the comparison result, and make corresponding adjustments, thereby realizing a flexible interconnected energy storage system and its control technology.

[0170] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units 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 can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0171] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; 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.

[0172] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0173] Those skilled in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, the aforementioned program can be stored in a readable storage medium, and when the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), disks or optical disks, and other media that can store program codes.

[0174] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A flexible interconnected energy storage system and a control method thereof, characterized in that: The following steps are involved: Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area; Extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index; Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and process and obtain an energy utilization index; Extracting device characteristic data according to the device characteristic data, and processing the data in combination with external environment characteristic data to obtain a responsiveness index; Processing is performed according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index; Comparing the dispatching capability effect index with a preset dispatching capability effect threshold, judging whether the power distribution control capability of the substation energy storage system is reliable according to the comparison result, and making corresponding adjustments; The collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of an energy storage system in a substation area includes: Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area; The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information; The system monitoring information includes energy storage device parameter information and line parameter information; The extracting power consumption dynamic data and system power supply dynamic data according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index, includes: Extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data; Extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data, and line impedance data; According to the active load power data, reactive load power data and load change rate data, combined with the energy storage capacity data, charge and discharge power data and line impedance data, a power balance index of the substation energy storage system is obtained; The step of acquiring the equipment characteristic data and the operation characteristic data of the energy storage system in the substation area and processing to obtain the energy utilization index includes: Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area; The device characteristic data includes charge and discharge efficiency data and self-discharge rate data; The operation characteristic data includes charge and discharge depth data and charge and discharge rate data; According to the charge and discharge efficiency data and the self-discharge rate data, combined with the charge and discharge depth data and the charge and discharge rate data, the energy utilization index of the substation energy storage system is obtained; The calculation formula of the power balance index is: ； in, is the power balance index, , , They are active load power data, reactive load power data, and load change rate data. , , They are energy storage capacity data, charge and discharge power data, and line impedance data. , , , , is the preset characteristic coefficient; The calculation formula of the energy utilization index is: ； in, is the energy utilization index, , They are charge and discharge efficiency data and self-discharge rate data respectively. , They are charge and discharge depth data and charge and discharge rate data respectively. , , , is the preset characteristic coefficient; The calculation formula of the responsiveness index is: ； in, is the responsiveness index, , , They are rate density data, energy density data, and charge and discharge rate data. , They are working temperature data and working humidity data respectively. , , , is the preset characteristic coefficient.

2. The flexible interconnected energy storage system and control method thereof according to claim 1, characterized in that: The extracting device characteristic data according to the device characteristic data and processing it in combination with the external environment characteristic data to obtain the responsiveness index includes: Extracting device characteristic data of the energy storage system in the substation according to the device characteristic data, including power density data, energy density data and charge and discharge rate data; Obtain external environment characteristic data, including the equipment's operating temperature data and operating humidity data; The power density data, energy density data and charge and discharge rate data are processed in combination with the working temperature data and the working humidity data to obtain the responsiveness index of the substation energy storage system.

3. The flexible interconnected energy storage system and control method thereof according to claim 2, characterized in that: The processing according to the power balance index, the energy utilization index and the responsiveness index to obtain the deployment capability effect index includes: According to the power balance index, energy utilization index and responsiveness index, a preset distribution energy storage evaluation model is used to process and obtain a dispatching capability effect index of the substation energy storage system; The calculation formula of the deployment capability effect index is: ； in, is the energy storage supply deviation index, , , They are power balance index, energy utilization index and responsiveness index respectively. , , , is the preset characteristic coefficient.

4. A flexible interconnected energy storage system and its control system, characterized in that: The system includes: a memory and a processor, wherein the memory includes a program of a flexible interconnected energy storage system and a control method thereof, and when the program of the flexible interconnected energy storage system and the control method thereof is executed by the processor, the following steps are implemented: Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area; Extracting power consumption dynamic data and system power supply dynamic data respectively according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index; Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area, and process and obtain an energy utilization index; Extracting device characteristic data according to the device characteristic data, and processing the data in combination with external environment characteristic data to obtain a responsiveness index; Processing is performed according to the power balance index, energy utilization index and responsiveness index to obtain a dispatching capability effect index; Comparing the dispatching capability effect index with a preset dispatching capability effect threshold, judging whether the power distribution control capability of the substation energy storage system is reliable according to the comparison result, and making corresponding adjustments; The collecting of power distribution monitoring information of a preset area within a preset time period and system monitoring information of an energy storage system in a substation area includes: Collect power distribution monitoring information of a preset area within a preset time period and system monitoring information of the energy storage system in the substation area; The power distribution monitoring information includes electrical parameter information, load side parameter information and power supply side parameter information; The system monitoring information includes energy storage device parameter information and line parameter information; The extracting power consumption dynamic data and system power supply dynamic data according to the power distribution monitoring information and the system monitoring information, and processing to obtain a power balance index, includes: Extracting power consumption dynamic data according to the electrical parameter information, load side parameter information and power supply side parameter information, including active load power data, reactive load power data and load change rate data; Extracting system power supply dynamic data according to the energy storage device parameter information and line parameter information, including energy storage capacity data, charge and discharge power data, and line impedance data; According to the active load power data, reactive load power data and load change rate data, combined with the energy storage capacity data, charge and discharge power data and line impedance data, a power balance index of the substation energy storage system is obtained; The step of acquiring the equipment characteristic data and the operation characteristic data of the energy storage system in the substation area and processing to obtain the energy utilization index includes: Acquire equipment characteristic data and operation characteristic data of the energy storage system in the substation area; The device characteristic data includes charge and discharge efficiency data and self-discharge rate data; The operation characteristic data includes charge and discharge depth data and charge and discharge rate data; According to the charge and discharge efficiency data and the self-discharge rate data, combined with the charge and discharge depth data and the charge and discharge rate data, the energy utilization index of the substation energy storage system is obtained; The calculation formula of the power balance index is: ； in, is the power balance index, , , They are active load power data, reactive load power data, and load change rate data. , , They are energy storage capacity data, charge and discharge power data, and line impedance data. , , , , is the preset characteristic coefficient; The calculation formula of the energy utilization index is: ； in, is the energy utilization index, , They are charge and discharge efficiency data and self-discharge rate data respectively. , They are charge and discharge depth data and charge and discharge rate data respectively. , , , is the preset characteristic coefficient; The calculation formula of the responsiveness index is: ； in, is the responsiveness index, , , They are rate density data, energy density data, and charge and discharge rate data. , They are working temperature data and working humidity data respectively. , , , is the preset characteristic coefficient.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a flexible interconnected energy storage system and a control method program thereof. When the flexible interconnected energy storage system and a control method program thereof is executed by a processor, the steps of the flexible interconnected energy storage system and a control method thereof according to any one of claims 1 to 3 are implemented.

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