A power supply side electrochemical energy storage monitoring system

Abstract

The present invention discloses a power supply side electrochemical energy storage monitoring system, which relates to the field of chemical energy storage technology and solves the technical problems of existing energy storage systems that are caused by unreasonable design and lead to grid instability and waste of resources. The present invention collects the rated power and load power of the grid, calculates the rated power and load power, obtains the deviation power required by the energy storage system, compares the actual output power of the energy storage system with the required output power, judges whether the energy storage system meets the power demand of the stable grid and judges whether the energy used for storage in the grid meets the grid demand, and calculates whether the energy storage system meets the grid demand to solve the above-mentioned problems. Through this application, it can be determined whether the energy storage system meets the grid stability demand, avoiding the problem of resource waste and grid instability caused by the energy storage system not meeting the grid demand.

Description

Technical Field

[0001] The present invention belongs to the field of power grid energy storage, relates to chemical energy storage technology, and specifically is a power supply side electrochemical energy storage monitoring system. Background Art

[0002] With the popularization of new energy vehicles, household appliances and factory automation, the required energy consumption has gradually increased, and the power grid has also been under more pressure. Due to the usage rhythm and time attributes of power facilities, there is excess or insufficient power in the power grid. In order to maintain the stability of the power grid, chemical energy storage devices are used for voltage stabilization. Through chemical energy storage devices, not only can the excess power of the power grid be utilized, but the power grid can also be made more stable.

[0003] Electrochemical energy storage systems are used to smooth the power output of renewable energy, reduce the impact on the large power grid, and improve the grid's ability to accept renewable energy power generation; electrochemical energy storage systems participate in auxiliary services such as grid peak regulation, frequency regulation, voltage regulation, standby, and black start, serving as emergency support for grid accidents, delaying grid investment, and improving power quality; at the same time, electrochemical energy storage systems mainly play the role of peak shaving and valley filling, participating in demand-side response, and providing paid auxiliary services.

[0004] The ultimate goal of establishing an electrochemical energy storage system is to maintain the stability of the power grid. However, current energy storage systems have some irrationalities. For example, an overly large capacity leads to cost waste, while an undersized capacity leads to system overload, which affects battery life. Therefore, it is extremely important to determine whether a chemical energy storage system meets the needs of the power grid to avoid wasting resources and causing grid instability. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a power supply-side electrochemical energy storage monitoring system for solving the technical problems of unreasonable design of existing energy storage systems leading to grid instability and resource waste. The present invention collects the rated power and load power of the grid, calculates the rated power and load power, calculates the required output power (deviation power) of the energy storage system, and compares the actual output power of the energy storage system with the required output power to determine whether the energy storage system meets the power requirements of a stable grid and whether the energy stored in the grid meets the grid demand, thereby inferring whether the energy storage system meets the grid demand to solve the above-mentioned problems.

[0006] To achieve the above objectives, the first aspect of the present invention provides a power supply side electrochemical energy storage monitoring system, comprising:

[0007] Data acquisition module: collects basic data through data acquisition equipment; wherein, the basic data includes the usage data of the power grid and the basic data of the energy storage system; the usage data includes the rated power and load power; the basic data includes the energy storage capacity, charging power and discharging power; the energy storage capacity is the capacity of the energy storage system;

[0008] Data processing module: determines whether the energy storage system meets the requirements based on usage data and basic data; if yes, obtains deviation capacity based on energy storage capacity and system accumulated energy, and compares the deviation capacity with the capacity deviation threshold to obtain a comparison result; if no, no operation is performed; wherein the system accumulated energy is the energy that the energy storage system needs to absorb; the comparison result includes whether the energy storage system meets the requirements or not;

[0009] Predict the changes in rated power, load power and energy storage capacity respectively to obtain predicted rated power, predicted load power and predicted energy storage capacity;

[0010] Based on the predicted rated power, predicted load power and predicted energy storage capacity, it is evaluated whether the energy storage system meets the requirements for grid stability; if yes, the energy storage system meets the voltage stabilization requirements; if not, the energy storage system does not meet the voltage stabilization requirements.

[0011] The energy storage system plays a key role in the stability of the power grid. When the load power of the power grid exceeds the rated power of the power grid, the energy storage system needs to release energy to stabilize the power of the power grid and keep the power grid stable; when the rated power of the power grid exceeds the load power, it absorbs the excess energy of the power grid to avoid waste of resources; however, the current technology has problems such as unreasonable design of energy storage systems, which leads to the failure to play a good stabilizing role for the power grid, relatively little energy absorption resulting in waste of resources, or excessively large energy storage systems resulting in high costs; this application collects the usage data of the power grid and the basic data of the energy storage system, and analyzes the usage data and energy storage data to evaluate whether the energy storage system can meet the needs and whether it is reasonable.

[0012] Preferably, judging whether the energy storage system meets the requirements based on the usage data and basic data includes:

[0013] Obtaining deviation power based on rated power and load power; wherein the deviation power is the power required to maintain grid stability;

[0014] Determine whether the deviation power is greater than the discharge power; if so, the discharge power of the energy storage system is too small and does not meet the requirements; if not, proceed to the next step;

[0015] Determine whether the grid's stored energy meets the grid's voltage stability requirements; if not, the grid's rated power is too low and does not meet the requirements; if yes, proceed to the next step; wherein the stored energy is the energy that is stored and then released to the grid when the grid's rated power is higher than the load power;

[0016] Determine whether the energy storage system's energy storage capacity meets the grid stability requirements; if yes, proceed to the next step; if not, the energy storage system capacity is too small and does not meet the requirements;

[0017] Determine whether the capacity of the energy storage system is within the healthy threshold range; if so, the energy storage system is considered to meet the requirements; if not, the energy storage system capacity is too small and does not meet the requirements;

[0018] Determine whether the capacity of the energy storage system is lower than the storage capacity threshold; if yes, the energy storage system capacity is too large, resulting in waste of resources and not meeting the requirements; if no, the energy storage system meets the requirements.

[0019] The primary purpose of an energy storage system is to stabilize grid voltage and prevent damage to grid-area equipment caused by grid fluctuations. When the grid requires external power to maintain stability, it's necessary to evaluate whether the energy storage system's discharge power can meet grid stability requirements. The key power parameters of an energy storage system for maintaining grid stability are charging power, discharging power, and energy storage capacity. Charging power affects the system's charging speed; storage capacity determines how much power the system can accept, and discharging power determines the power it can provide to stabilize the grid. While ensuring grid stability, energy storage systems avoid wasting power resources, creating greater benefits. Therefore, analyzing charging power, discharging power, and storage capacity to determine whether an energy storage system meets requirements is more comprehensive and reasonable.

[0020] Preferably, the determining whether the energy storage capacity of the power grid meets the voltage stability requirement of the power grid includes:

[0021] Preprocess the rated power and load power to obtain the optimized rated power and optimized load power respectively;

[0022] Perform curve fitting on the optimized rated power and the optimized load power to obtain the rated power curve and the load power curve;

[0023] The grid energy storage power curve and the grid demand curve are calculated based on the rated power curve and the load power curve; wherein the grid energy storage power curve is a curve showing the power that can be stored in the energy storage system when the grid meets the load power, and the grid demand curve is a curve showing the power required to stabilize the grid, which changes over time.

[0024] The grid energy storage power curve is optimized based on the conversion factor to obtain the grid optimized energy storage curve; the grid deviation energy storage curve is calculated based on the grid optimized energy storage curve and the grid demand curve; the conversion factor is the energy conversion rate during the charging and discharging process of the energy storage system;

[0025] Integrate the grid deviation energy storage curve to obtain the grid accumulated energy;

[0026] Determine whether the accumulated energy of the power grid will be less than zero. If so, the stored energy of the power grid can meet the demand; if not, the stored energy of the power grid cannot meet the demand.

[0027] By calculating historical rated power and rated load, we can determine the power and energy required to stabilize the grid, and then calculate the energy available for storage. Since energy storage systems have conversion losses, we multiply the grid's available energy by the conversion factor to determine the energy available for grid stabilization. This method can determine whether the grid's available energy for storage and stabilization meets demand. If it doesn't, the energy storage mechanism won't be able to generate enough energy to stabilize the grid.

[0028] The grid stores energy when it has excess energy and releases it to stabilize the grid when the load is excessive. During this process, the energy comes entirely from the grid. If the grid's excess energy isn't sufficient to stabilize the grid during an overload, the energy storage mechanism won't be able to stabilize the grid. The excess energy is then retransmitted back to the grid, a process that involves energy conversion. Therefore, a conversion factor is introduced to correct the excess energy and determine the energy released to the grid. This step can determine whether the grid's energy conversion meets voltage stabilization requirements, eliminating any issues with the energy storage system itself.

[0029] Preferably, determining whether the energy storage capacity of the energy storage system meets the grid stability requirement includes:

[0030] Obtain the charging power of the energy storage system and perform data fitting to obtain a charging power curve;

[0031] Obtaining a system energy storage curve based on a charging power curve and a grid energy storage power curve;

[0032] The optimized energy storage curve of the power grid is obtained by optimizing the system energy storage curve based on the conversion factor;

[0033] The system deviation energy storage curve is obtained by calculating based on the grid optimization energy storage curve and the grid demand curve;

[0034] The system cumulative energy is obtained from the system deviation energy storage curve;

[0035] Obtaining available accumulated energy based on the system accumulated energy and the energy storage capacity; the available accumulated energy is the energy that can be stored in the energy storage system;

[0036] Determine whether the available accumulated energy will be less than zero. If so, the energy storage capacity of the energy storage system cannot meet the demand; if not, the energy storage capacity of the energy storage system can meet the demand.

[0037] The energy storage system stores energy when the grid has excess energy. The charging power of the energy storage system depends on the rated power of the energy storage system itself. When the real-time power of the grid's excess energy is lower than the rated power of the energy storage system, the energy storage system is charged according to the real-time power of the grid. When the real-time power of the energy storage system is greater than the rated power of the grid, the energy storage system is charged according to the rated power. When the energy storage system is fully charged, the energy storage system stops charging and discharges when the grid needs energy for stability. In this process, if the power of the energy storage system can meet the grid stability requirements, then the energy storage system meets the requirements.

[0038] Preferably, the steps after the energy storage capacity of the energy storage system cannot meet the demand include:

[0039] Deviation capacity is calculated based on the system cumulative energy and available cumulative energy;

[0040] The energy storage capacity curve is obtained by performing data fitting based on the capacity data of the energy storage system;

[0041] Obtain deviation costs through deviation capacity and electricity unit price;

[0042] Based on the deviation cost, electricity consumption impact coefficient and energy storage capacity curve, determine whether the energy storage system capacity needs to be increased; if yes, increase the energy storage system capacity; if no, do not increase the energy storage system capacity; wherein, the electricity consumption impact coefficient is the degree of impact of grid stability on production and life.

[0043] If the energy storage system's capacity does not meet demand, the grid's stability requires increasing its capacity, which increases the cost of the system. Insufficient grid stability can impact production and daily life. The capacity of the energy storage system also changes over time during use. Therefore, considering all these factors comprehensively determines whether grid capacity expansion is necessary.

[0044] Preferably, the step of obtaining the grid energy storage power curve includes:

[0045] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0046] The grid energy storage power curve DCG(t) is obtained by the formula DCG(t)={|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time.

[0047] In the power grid, the rated power and load power fluctuate at any time, so there are high and low conversion results of the rated power and load power. Through this calculation formula, the required result can be obtained regardless of how the rated power and load power are converted.

[0048] Preferably, the step of obtaining the grid demand curve includes:

[0049] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0050] The grid energy storage power curve DCG(t) is obtained by the formula DCG(t)={|FG(t)-EG(t)|+[FG(t)-EG(t)]} / 2; where t is time;

[0051] Preferably, the step of obtaining the grid optimization energy storage curve includes:

[0052] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0053] The grid optimization energy storage curve YCQ(t) is obtained by the formula YCQ(t)=ζ1×ζ2×{|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time, ζ1 and ζ2 are the energy conversion rates of the energy storage system for storing and releasing energy, respectively.

[0054] Preferably, obtaining the system energy storage curve includes:

[0055] By formula Obtain the system energy storage curve CNQ(t); where t is time and CS is the charging power of the energy storage system.

[0056] Preferably, obtaining the energy storage curve of the optimization system includes:

[0057] The optimized system energy storage curve YCQ(t) is obtained by the formula YCQ(t)=ζ1×ζ2×CNQ(t); where t is time, ζ1 and ζ2 are the electrical energy conversion rates of the energy storage system for storing and releasing energy, respectively.

[0058] Preferably, the acquisition of the system accumulated energy includes:

[0059] By formula Obtain the system cumulative energy LXNQ(t); where t0 is the start time and t is the current time.

[0060] Preferably, determining whether the deviation power is greater than the discharge power includes:

[0061] The deviation curve PQ(t) is obtained by the formula PQ(t)=EG(t)-FG(t);

[0062] When EG(t) is less than FG(t), the discharge power FDG(t) required by the energy storage system is obtained by the formula FDG(t)=|EG(t)-FG(t)|;

[0063] Determine whether FG(t) is greater than the discharge power of the energy storage system. If yes, the deviation power is greater than the discharge power; if not, the deviation power is not greater than the discharge power.

[0064] Preferably, obtaining the available accumulated energy based on the system accumulated energy and the energy storage capacity includes:

[0065] S21: Obtaining the energy storage capacity saturation of the current energy storage system; the energy storage capacity saturation is the ratio of the current energy storage capacity to the rated energy storage capacity of the energy storage system;

[0066] S22: Determine whether the energy storage capacity saturation of the energy storage system is greater than the energy storage threshold; if yes, proceed to S23; if no, proceed to S21;

[0067] S23: The energy storage system stops charging and waits to discharge when the grid needs it.

[0068] Compared with the prior art, the beneficial effect of the present invention is that: through this application, it can be determined whether the energy storage system meets the grid stability requirements, avoiding the problem of resource waste and grid instability caused by the energy storage system not meeting the grid requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0070] Figure 1 Schematic diagram of a power supply side electrochemical energy storage monitoring system according to an embodiment of the present invention;

[0071] Figure 2 A schematic diagram of a process for evaluating whether an energy storage system meets requirements according to an embodiment of the present invention;

[0072] Figure 3 2 is a flow chart of evaluating whether a power grid meets requirements according to an embodiment of the present invention. DETAILED DESCRIPTION

[0073] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0074] See also Figure 1 The first embodiment of the present invention provides a power supply side electrochemical energy storage monitoring system, comprising:

[0075] Data acquisition module: collects basic data through data acquisition equipment; wherein, the basic data includes the usage data of the power grid and the basic data of the energy storage system; the usage data includes the rated power and load power; the basic data includes the energy storage capacity, charging power and discharging power; the energy storage capacity is the capacity of the energy storage system;

[0076] Data processing module: determines whether the energy storage system meets the requirements based on usage data and basic data; if yes, obtains deviation capacity based on energy storage capacity and system accumulated energy, and compares the deviation capacity with the capacity deviation threshold to obtain a comparison result; if no, no operation is performed; wherein the system accumulated energy is the energy that the energy storage system needs to absorb; the comparison result includes whether the energy storage system meets the requirements or not;

[0077] Predict the changes in rated power, load power and energy storage capacity respectively to obtain predicted rated power, predicted load power and predicted energy storage capacity;

[0078] Based on the predicted rated power, predicted load power and predicted energy storage capacity, it is evaluated whether the energy storage system meets the requirements for grid stability; if yes, the energy storage system meets the voltage stabilization requirements; if not, the energy storage system does not meet the voltage stabilization requirements.

[0079] It should be noted that the load of the power grid changes over time, especially household electricity consumption, factory electricity consumption and car charging, which have certain time patterns. By statistically analyzing the relationship between these load changes and time, a data set is obtained. These data sets are segmented and curve fitting is performed on these data to obtain the corresponding change curve. Multiple segments of fitting data are then added together to obtain the fitting curve data.

[0080] Data processing is performed on the fitting curve to determine whether the energy storage system meets the needs of the power grid.

[0081] By analyzing historical data and inferring forecast data, it is determined whether the energy storage system meets the needs of the energy storage system after the preset time, and then it is evaluated whether the energy storage system needs to be improved.

[0082] See also Figure 2 , the process steps for evaluating whether the energy storage capacity of the power grid meets the demand include: obtaining a deviation power based on the rated power and the load power; wherein the deviation power is the power required to maintain the stability of the power grid;

[0083] Determine whether the deviation power is greater than the discharge power; if so, the discharge power of the energy storage system is too small and does not meet the requirements; if not, proceed to the next step;

[0084] Determine whether the grid's stored energy meets the grid's voltage stability requirements; if not, the grid's rated power is too low and does not meet the requirements; if yes, proceed to the next step; wherein the stored energy is the energy that is stored and then released to the grid when the grid's rated power is higher than the load power;

[0085] Determine whether the energy storage system's energy storage capacity meets the grid stability requirements; if yes, proceed to the next step; if not, the energy storage system capacity is too small and does not meet the requirements;

[0086] Determine whether the capacity of the energy storage system is within the healthy threshold range; if so, the energy storage system is considered to meet the requirements; if not, the energy storage system capacity is too small and does not meet the requirements;

[0087] Determine whether the capacity of the energy storage system is lower than the storage capacity threshold; if yes, the energy storage system capacity is too large, resulting in waste of resources and not meeting the requirements; if no, the energy storage system meets the requirements.

[0088] It should be noted that the energy storage system is built to stabilize the power grid and absorb excess energy from the power grid. Therefore, whether the power grid meets the energy storage stability conditions is crucial. Only when the excess energy in the power grid is sufficient can the energy storage system receive enough energy to adjust the stability of the power grid.

[0089] The grid data includes rated power and load power. By calculating the rated power and load power, we can determine whether the excess energy can meet the grid adjustment needs during the peak period of the grid, so as to meet the stability requirements of the grid.

[0090] In a preferred embodiment, the health threshold range is 20%-80% of the rated capacity of the energy storage system.

[0091] In a preferred embodiment, the step of obtaining the grid energy storage power curve includes:

[0092] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0093] The grid energy storage power curve DCG(t) is obtained by the formula DCG(t)={|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time.

[0094] It should be noted that the rated power is the output power of the power grid itself, while the load power is the power consumed by the power grid. The load power of the power grid changes over time. When the rated power is greater than the load power, there is surplus power for storage. Therefore, by calculating the difference between the rated power and the load power, the excess energy of the power grid can be obtained.

[0095] In a preferred embodiment, the step of obtaining the grid demand curve includes:

[0096] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0097] The grid demand curve DCG(t) is obtained by the formula DCG(t)={|FG(t)-EG(t)|+[FG(t)-EG(t)]} / 2; where t is time;

[0098] It should be noted that when the rated power is less than the load power, the grid needs to absorb energy to maintain grid stability. Therefore, by calculating the difference between the load power and the rated power, the energy that the grid needs to absorb can be obtained.

[0099] In a preferred embodiment, the step of obtaining the grid optimized energy storage curve includes:

[0100] Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively;

[0101] The grid optimization energy storage curve YCQ(t) is obtained by the formula YCQ(t)=ζ1×ζ2×{|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time, ζ1 and ζ2 are the energy conversion rates of the energy storage system for storing and releasing energy, respectively.

[0102] The excess energy of the power grid will suffer energy loss during the storage and release process. Therefore, the corresponding conversion rate is obtained according to the changes in the power grid's stored energy and released energy. The stored energy of the power grid is optimized through this conversion rate to obtain the actual energy that can be released to the power grid.

[0103] See also Figure 3 , the process steps for assessing whether the grid meets the requirements include:

[0104] Obtain the charging power of the energy storage system and perform data fitting to obtain a charging power curve;

[0105] Obtaining a system energy storage curve based on a charging power curve and a grid energy storage power curve;

[0106] The optimized energy storage curve of the power grid is obtained by optimizing the system energy storage curve based on the conversion factor;

[0107] The system deviation energy storage curve is obtained by calculating based on the grid optimization energy storage curve and the grid demand curve;

[0108] The system cumulative energy is obtained from the system deviation energy storage curve;

[0109] Obtaining available accumulated energy based on the system accumulated energy and the energy storage capacity; the available accumulated energy is the energy that can be stored in the energy storage system;

[0110] Determine whether the available accumulated energy will be less than zero. If so, the energy storage capacity of the energy storage system cannot meet the demand; if not, the energy storage capacity of the energy storage system can meet the demand.

[0111] It should be noted that when the grid has sufficient energy, whether the energy storage system can absorb excess energy depends on the design of the energy storage system itself. By analyzing the basic data of the energy storage system itself, it can be determined whether the battery system meets the requirements.

[0112] In a preferred embodiment, obtaining the system energy storage curve includes:

[0113] By formula Obtain the system energy storage curve CNQ(t); where t is time and CS is the charging power of the energy storage system.

[0114] How much energy the energy storage system can absorb depends on its energy storage capacity, and the speed at which the energy storage system absorbs excess energy depends on the charging power of the energy storage system. When the excess energy power of the grid is greater than the charging power of the energy storage system, the energy storage system can only absorb the electrical energy of the charging power. When the excess energy power of the grid is less than the charging power of the energy storage system, the energy storage system is charged according to the actual excess energy power of the grid.

[0115] In a preferred embodiment, obtaining the energy storage curve of the optimization system includes:

[0116] The optimized system energy storage curve YCQ(t) is obtained by the formula YCQ(t)=ζ1×ζ2×CNQ(t); where t is time, ζ1 and ζ2 are the electrical energy conversion rates of the energy storage system for storing and releasing energy, respectively.

[0117] In a preferred embodiment, the acquisition of system accumulated energy includes:

[0118] By formula Obtain the system cumulative energy LXNQ(t); where t0 is the start time and t is the current time.

[0119] In a preferred embodiment, determining whether the deviation power is greater than the discharge power includes:

[0120] The deviation curve PQ(t) is obtained by the formula PQ(t)=EG(t)-FG(t);

[0121] When EG(t) is less than FG(t), the discharge power FDG(t) required by the energy storage system is obtained by the formula FDG(t)=|EG(t)-FG(t)|;

[0122] Determine whether FG(t) is greater than the discharge power of the energy storage system. If yes, the deviation power is greater than the discharge power; if not, the deviation power is not greater than the discharge power.

[0123] Some of the data in the above formula are calculated by removing the dimensions and taking their numerical values. The formula is a formula that is closest to the actual situation obtained by software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are set by technical personnel in this field according to actual conditions or obtained through simulation of a large amount of data.

[0124] The working principle of the present invention: This application obtains the rated power and load power of the power grid through data acquisition equipment. When the rated power is greater than the load power, the power grid generates excess energy. When the rated power is less than the load power, the power grid needs to absorb the energy of the energy storage system to stabilize, and the energy storage is calculated.

[0125] The present invention collects the rated power and load power of the power grid, and calculates the rated power and load power.

[0126] Obtain the deviation power required by the energy storage system based on the rated power and load power.

[0127] By comparing the actual output power of the energy storage system with the required output power, it is determined whether the energy storage system meets the power requirements of the stable power grid and whether the energy stored by the grid meets the grid demand, and whether the energy storage system meets the grid demand.

[0128] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A power supply side electrochemical energy storage monitoring system, characterized in that: include: Data acquisition module: collects grid usage data and basic data of the energy storage system through data acquisition equipment; the usage data includes rated power and load power; the basic data includes energy storage capacity, charging power and discharging power; the energy storage capacity is the capacity of the energy storage system; Data processing module: determines whether the energy storage system meets the requirements based on usage data and basic data; if yes, obtains deviation capacity based on energy storage capacity and accumulated system energy, and compares the deviation capacity with the capacity deviation threshold to obtain a comparison result; if no, no operation is performed; wherein the accumulated system energy is the energy that the energy storage system needs to absorb; the comparison result includes whether the energy storage system meets the requirements or not; Predict the changes in rated power, load power and energy storage capacity respectively to obtain predicted rated power, predicted load power and predicted energy storage capacity; Based on the predicted rated power, predicted load power, and predicted energy storage capacity, the energy storage system is evaluated to see whether it meets the requirements for grid stability. If yes, the energy storage system meets the voltage stabilization requirements; if no, the energy storage system does not meet the voltage stabilization requirements. The determination of whether the energy storage system meets the requirements based on the usage data and basic data includes: Obtaining deviation power based on rated power and load power; wherein the deviation power is the power required to maintain grid stability; Determine whether the deviation power is greater than the discharge power; if so, the energy storage system does not meet the requirements; if not, proceed to the next step; Determine whether the energy storage capacity of the power grid meets the voltage stability requirements of the power grid; if not, the energy storage system does not meet the requirements; if yes, proceed to the next step; wherein, the energy storage capacity is the energy stored and then released to the power grid when the rated power of the power grid is higher than the load power; Determine whether the energy storage system's energy storage capacity meets the grid stability requirements; if yes, proceed to the next step; if not, the energy storage system does not meet the requirements; Determine whether the capacity of the energy storage system is within the health threshold range; if yes, the energy storage system is considered to meet the requirements; if not, the energy storage system does not meet the requirements; Determine whether the capacity of the energy storage system is lower than the storage capacity threshold; if yes, the energy storage system does not meet the requirements; if no, the energy storage system meets the requirements; The determining whether the energy storage capacity of the power grid meets the voltage stability requirement of the power grid includes: Preprocess the rated power and load power to obtain the optimized rated power and optimized load power respectively; Perform curve fitting on the optimized rated power and the optimized load power to obtain the rated power curve and the load power curve; The grid energy storage power curve and the grid demand curve are calculated based on the rated power curve and the load power curve; wherein the grid energy storage power curve is a curve showing the power that can be stored in the energy storage system when the grid meets the load power, and the grid demand curve is a curve showing the power required to stabilize the grid, which changes over time. The grid energy storage power curve is optimized based on the conversion factor to obtain the grid optimized energy storage curve; the grid deviation energy storage curve is calculated based on the grid optimized energy storage curve and the grid demand curve; the conversion factor is the energy conversion rate during the charging and discharging process of the energy storage system; Integrate the grid deviation energy storage curve to obtain the grid accumulated energy; Determine whether the accumulated energy of the power grid is less than zero. If so, the energy storage of the power grid can meet the demand; if not, the energy storage of the power grid cannot meet the demand; Determining whether the energy storage capacity of the energy storage system meets the grid stability requirement includes: Obtain the charging power of the energy storage system and perform data fitting to obtain a charging power curve; Obtaining a system energy storage curve based on a charging power curve and a grid energy storage power curve; The optimized energy storage curve of the power grid is obtained by optimizing the system energy storage curve based on the conversion factor; The system deviation energy storage curve is obtained by calculating based on the grid optimization energy storage curve and the grid demand curve; Integrate the system deviation energy storage curve to obtain the system cumulative energy; Obtaining available accumulated energy based on the system accumulated energy and the energy storage capacity; the available accumulated energy is the energy that can be stored in the energy storage system; Determine whether the available accumulated energy is less than zero. If so, the energy storage capacity of the energy storage system cannot meet the demand; if not, the energy storage capacity of the energy storage system can meet the demand; The step of obtaining the grid energy storage power curve includes: Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively; The grid energy storage power curve DCG(t) is obtained by the formula DCG(t)={|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time; The step of obtaining the grid optimized energy storage curve includes: Obtain the rated power curve and the load power curve, and mark them as EG(t) and FG(t) respectively; The grid optimization energy storage curve YCQ(t) is obtained by the formula YCQ(t)=ζ1×ζ2×{|EG(t)-FG(t)|+[EG(t)-FG(t)]} / 2; where t is time, ζ1 and ζ2 are the energy conversion rates of the energy storage system for storing and releasing energy, respectively. The acquisition of the system energy storage curve includes: By formula Obtain the system energy storage curve CNQ(t); where t is time and CS is the charging power of the energy storage system; The acquisition of the system accumulated energy includes: By formula Obtain the system cumulative energy LXNQ(t); where t0 is the start time; t is the current time; The determining whether the deviation power is greater than the discharge power includes: When EG(t) is less than FG(t), the discharge power FDG(t) required by the energy storage system is obtained by the formula FDG(t)=|EG(t)-FG(t)|.

2. A power supply side electrochemical energy storage monitoring system according to claim 1, characterized in that: After the grid's stored energy cannot meet demand, the following steps are also included: The energy storage capacity curve is obtained by performing data fitting based on the capacity data of the energy storage system; Obtain deviation costs through deviation capacity and electricity unit price; Based on the deviation cost, electricity consumption impact coefficient and energy storage capacity curve, determine whether the energy storage system capacity needs to be increased; if yes, increase the energy storage system capacity; if no, do not increase the energy storage system capacity; wherein, the electricity consumption impact coefficient is the degree of impact of grid stability on production and life.

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