A comprehensive management system for distributed energy storage equipment

Abstract

The present invention relates to the technical field of energy storage device management, and specifically to an integrated management system for distributed energy storage devices; the system comprises: a server, a state extraction module and an intelligent management module; by extracting features of the operating state, charging state and discharging state of the distributed energy storage devices, the system comprehensively considers indicators of temperature distribution, charging and discharging performance and other aspects, and can comprehensively and objectively evaluate the state of the energy storage devices, help management personnel to more accurately understand the operating conditions of the devices, and provide important technical support for realizing intelligent management of distributed energy storage devices; by monitoring the comprehensive analysis and judgment of the temperature difference change index, the charging attenuation index and the discharging attenuation index, the system can timely identify the potential safety hazards of the energy storage devices; and by regulating the energy storage devices to execute energy storage regulation measures, the system can optimize the electric energy storage of the distributed energy storage devices with safety risks, and can maximize the use of the capacity of the energy storage devices while ensuring the safety of the regulated electric storage devices.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage equipment management, and in particular to a comprehensive management system for distributed energy storage equipment. Background Art

[0002] Distributed energy storage equipment refers to energy storage devices distributed at various nodes in the power system, usually including lithium-ion batteries, sodium-sulfur batteries, supercapacitors, etc. These devices can store electrical energy in the power system and release it when needed; distributed energy storage equipment plays an important role in the power system, not only relieving the load pressure of the power grid, but also providing backup power support; therefore, it is very necessary to carry out comprehensive management of distributed energy storage equipment;

[0003] At present, distributed energy storage devices are usually maintained or replaced in fixed cycles. However, due to different equipment usage and different environments, there are great differences. For example, some equipment is seriously aged and has serious abnormal operating conditions, which poses a great threat to the safe operation of the power grid. However, some equipment is in a suitable environment, has a low degree of aging, and is in normal operating condition. Therefore, it can still operate better and maintain the stability of the power grid. Therefore, maintenance or replacement based solely on fixed cycles is a single and wasteful approach, which is not intelligent enough. Summary of the invention

[0004] The purpose of the present invention is to provide a comprehensive management system for distributed energy storage equipment to solve the problems mentioned in the above background technology.

[0005] The object of the present invention can be achieved by the following technical solutions: A comprehensive management system for distributed energy storage equipment, comprising: a server, a state extraction module and an intelligent management module;

[0006] The server communicates with each sensor to obtain the operating information of the distributed energy storage device; the operating information includes charging parameters, discharging parameters, and a three-dimensional temperature distribution diagram of the device;

[0007] The state extraction module extracts state features based on the state information of the energy storage device to obtain state feature parameters, wherein the state feature parameters include a temperature difference change index, a charging attenuation index, and a discharging attenuation index; the state extraction includes operating state feature extraction, charging state extraction, and discharging state extraction;

[0008] The intelligent management module determines the state of the energy storage device based on the state characteristic parameters and generates corresponding measures; specifically:

[0009] The temperature difference change index Mc, charge attenuation index Ma, and discharge attenuation index Mb of the energy storage device are retrieved, and the management value DM of each energy storage device is calculated through the set formula DM=d1×Mc+d2×Ma+d3×Mb, where d1, d2, and d3 are respectively the set proportional coefficients; when the management value is greater than the maximum value in the set management interval, a switching instruction is generated, and the backup energy storage device is switched; when the management value is within the set management interval, the energy storage device corresponding to the management value is recorded as a control energy storage device, and a maintenance instruction is generated to the corresponding engineer; when the management value is less than the minimum value in the set management interval, the energy storage device corresponding to the management value is recorded as a coordination energy storage device;

[0010] The energy storage equipment is regulated to execute energy storage regulation measures until the maintenance completion instruction is received from the engineer; the energy storage regulation measures are specifically:

[0011] Step 1: Obtain the storage capacity of each coordinated energy storage device. When the storage capacity is less than the set storage capacity, the coordinated energy storage device is recorded as a primary coordinated device;

[0012] Step 2: Obtain the thread distance between each primary coordination device and the control energy storage device, and record it as Vg; use the set formula Calculate and obtain the coordination value VF of each preliminary coordination device and the regulating energy storage device, where f1 and f2 are respectively the set proportional coefficients; select the preliminary coordination device with the largest coordination value as the target coordination device for regulating the energy storage device;

[0013] Step 3: Divide the management value corresponding to the regulated energy storage device by the set reserve constant to obtain the standard reserve of the regulated energy storage device. When the storage capacity of the regulated energy storage device reaches the standard reserve, the electric energy flowing to the regulated energy storage device is controlled to be transmitted to the target coordination device.

[0014] Preferably, the specific process of extracting the running status features is:

[0015] Retrieve the three-dimensional temperature distribution diagram of the equipment corresponding to each acquisition moment, divide the three-dimensional temperature distribution diagram into several blocks, identify the color corresponding to each interval to obtain the chromatogram value corresponding to each block, and compare and analyze them to obtain the temperature index; construct a two-dimensional rectangular coordinate system with time as the horizontal coordinate and the temperature difference index as the vertical coordinate, input the temperature difference index into the coordinate system according to the corresponding acquisition moment, and record the position of the temperature difference index in the coordinate axis as the temperature difference point, use a smooth curve to connect the temperature difference points in sequence to obtain a relationship diagram of the temperature difference index changing with time; perform graphical analysis on the relationship diagram of the temperature difference index changing with time to obtain the temperature change index.

[0016] Preferably, the specific process of graphic analysis is:

[0017] Draw a tangent line of the curve at the temperature difference point, and calculate the slope of the tangent line to obtain the temperature difference slope of each temperature difference point; count the number of temperature difference slopes greater than zero and record it as M7, and sum up the temperature difference slopes greater than zero to obtain the temperature difference deterioration degree and record it as N5; count the number of temperature difference slopes less than zero and record it as M8, and sum up the temperature difference slopes less than zero and calculate the temperature difference improvement degree and record it as N6; count the number of temperature difference slopes equal to zero and record it as M9;

[0018] Assume that each energy storage device corresponds to a charging influence coefficient denoted as γ1, and substitute it with the number of temperature difference slopes greater than zero M7, the temperature difference deterioration degree N5, the number of temperature difference slopes less than zero M8, the temperature difference improvement degree N6, and the number of temperature difference slopes equal to zero M9 into the set formula The temperature difference variation index Mc is calculated, where c4, c5, c6, and c7 are respectively set proportional coefficients.

[0019] Preferably, the specific process of charging state extraction is:

[0020] Retrieve the charging parameters corresponding to each acquisition moment, where the charging parameters include the actual charging capacity and the actual charging current, and record them as C1j and C2j, respectively, where j = 1, 2, 3 ... J, J is a positive integer, J represents the total number of acquisition moments, and j represents the sequence number of any acquisition moment; compare the type of energy storage device with all the set types of energy storage devices to match the corresponding standard charging capacity and standard charging flow, and record them as HC1 and HC2 respectively; use the set formula The charging index Caj corresponding to each acquisition moment is calculated, where a1 and a2 are the set proportional coefficients respectively;

[0021] A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the charging index as the vertical coordinate. The charging index is input into the coordinate system according to its corresponding collection time, and the position of the charging index in the coordinate system is the charging point. A smooth curve is used to connect the charging points in sequence to obtain a curve graph of the charging index changing with time; a graphical analysis is performed on the curve graph of the charging index changing with time to obtain the charging attenuation index.

[0022] Preferably, the specific process of extracting the discharge state is:

[0023] Retrieve the discharge parameters corresponding to each acquisition moment, where the discharge parameters include the actual discharge capacity and the actual discharge flow, and record them as F1j and F2j respectively; compare the type of energy storage device with all the set types of energy storage devices to match the corresponding standard discharge capacity and standard discharge flow, and record them as HF1 and HF2 respectively; use the set formula The discharge index Fb is calculated, where b1 and b2 are respectively the set proportional coefficients;

[0024] A two-dimensional rectangular coordinate system is constructed with time as the horizontal axis and the discharge index as the vertical axis. The discharge index is input into the coordinate system according to its corresponding collection time, and the position of the discharge index in the coordinate system is taken as the discharge point. A smooth curve is used to connect the discharge points in sequence to obtain a curve graph of the discharge index changing with time. A graphical analysis is performed on the curve graph of the discharge index changing with time to obtain the discharge attenuation index.

[0025] Preferably, the intelligent management module is also used to analyze the historical charge and discharge records of the energy storage device to obtain the charge and discharge influence coefficient. The specific analysis process is:

[0026] Obtain the number of charge and discharge times of the energy storage device and the start time, end time, and charge and discharge amount corresponding to each charge and discharge, calculate the time difference between the start time and end time of each charge of the energy storage device to obtain the charging time of each charge, and divide the charge amount by the charging time to obtain the charging efficiency of each charge; similarly, the discharge efficiency of each discharge can be obtained; sum up the charging efficiency corresponding to each charge to obtain the cumulative value of the charging efficiency, which is recorded as T1, and sum up the discharge efficiency corresponding to each discharge to obtain the cumulative value of the discharge efficiency, which is recorded as T2;

[0027] Compare and analyze the charging efficiency with the set charging interval to divide the charging efficiency into high charging efficiency, medium charging efficiency and low charging efficiency, and count the cumulative times of high charging efficiency, medium charging efficiency and low charging efficiency, which are recorded as A1, A2 and A3 respectively;

[0028] The discharge efficiency is compared and analyzed with the set discharge interval to divide the discharge efficiency into high discharge efficiency, medium discharge efficiency and low discharge efficiency, and the cumulative times of high discharge efficiency, medium discharge efficiency and low discharge efficiency are counted respectively, which are recorded as B1, B2 and B3 respectively;

[0029] Substitute T1, T2, A1, A2, A3, B1, B2 and B3 into the set formula group The charging influence coefficient γ1 and the discharging influence coefficient γ2 are calculated, wherein are respectively the set proportional coefficients; the charging influence coefficient γ1 and the discharging influence coefficient γ2 are sent to the state extraction module.

[0030] Beneficial effects of the present invention:

[0031] 1. By extracting the characteristics of the operating status, charging status and discharging status of distributed energy storage equipment, and comprehensively considering indicators such as temperature distribution and charging and discharging performance, it can comprehensively and objectively evaluate the status of energy storage equipment, help managers understand the operating status of the equipment more accurately, and provide important technical support for the intelligent management of distributed energy storage equipment;

[0032] 2. Through comprehensive analysis and judgment of monitoring temperature difference change index, charging attenuation index and discharging attenuation index, the potential safety hazards of energy storage equipment can be identified in time. When the management value exceeds the set management range, the system can quickly generate a switching instruction to switch the energy storage equipment with potential safety hazards to the backup equipment, thereby effectively avoiding possible safety accidents. At the same time, by regulating the energy storage equipment to execute energy storage regulation measures, the energy storage optimization of distributed energy storage equipment with safety risks is achieved, which can maximize the use of the capacity of the energy storage equipment while ensuring the safety of the regulated energy storage equipment and improve the power supply efficiency of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 As shown, the present invention is a comprehensive management system for distributed energy storage equipment, including: a state extraction module, a server and an intelligent management module;

[0037] The server communicates with each sensor to obtain the operating information of the distributed energy storage device; the operating information includes charging parameters, discharging parameters, and a three-dimensional temperature distribution map of the device; the three-dimensional temperature distribution map of the device is formed by using an infrared laser scanner to perform a three-dimensional scan of the energy storage device and record the temperature information of each position, and then fill the temperature information into the corresponding position; in the three-dimensional temperature distribution map, different temperatures are mapped to a color, and different colors correspond to a color spectrum value, so it can be seen that the temperature-color-color spectrum value presents a one-to-one correspondence; for example, blue represents low temperature and red represents high temperature; the color spectrum value corresponding to blue is smaller than the color spectrum value corresponding to red;

[0038] The state extraction module extracts the charging state, discharging state, and operating state of the distributed energy storage device through operation information and environmental information to obtain state characteristic parameters, which can comprehensively measure the state characteristics of the distributed energy storage device and provide support for accurately evaluating the state of the distributed energy storage device; specifically:

[0039] Running status feature extraction:

[0040] Retrieve the three-dimensional temperature distribution map of the equipment corresponding to each acquisition moment, divide the three-dimensional temperature distribution map into several blocks, identify the color corresponding to each interval to obtain the chromatogram value corresponding to each block, record it as Si, i=12,3...I, I is a positive integer, I represents the total number of blocks, and i represents the sequence number of any block; select any two blocks, and calculate the difference between their corresponding chromatogram values ​​to obtain the chromatogram difference; compare and analyze the chromatogram difference with the set difference interval. When the chromatogram difference is greater than the set difference interval, accumulate the chromatogram height difference once, and record the chromatogram difference as the primary chromatogram difference; when the chromatogram difference is in When the chromatographic difference is within the set difference interval, the chromatographic medium difference is accumulated once, and the chromatographic difference is recorded as the secondary chromatographic difference; when the chromatographic difference is less than the minimum value in the set difference interval, the chromatographic low difference is accumulated once, and the chromatographic difference is recorded as the tertiary chromatographic difference; the accumulated times of chromatographic height difference, chromatographic medium difference and chromatographic low difference are counted respectively, and they are recorded as L1, L2 and L3 respectively; the primary chromatographic difference, the secondary chromatographic difference and the tertiary chromatographic difference are summed up to obtain the primary chromatographic total difference, the secondary chromatographic total difference and the tertiary chromatographic total difference, and they are recorded as L1, L2 and L3 respectively; using the set formula The temperature difference index Lc is calculated, where c1, c2, and c3 are the set proportional coefficients, and c1>c2>c3>0, and e is a natural constant. is the mean of the chromatogram values ​​of each block in the three-dimensional temperature distribution diagram; the temperature difference index corresponding to the energy storage device at each acquisition time is thus recorded as Lcj; it can be seen from the formula that the greater the temperature difference between each position in the three-dimensional temperature distribution diagram of the energy storage device, the more serious the temperature unevenness of the energy storage device is, the greater the possibility of a threat to the operation of the energy storage device, and the greater the temperature difference index; a two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the temperature difference index as the vertical coordinate, the temperature difference index is input into the coordinate system according to the corresponding acquisition time, and the position of the temperature difference index in the coordinate axis is recorded as the temperature difference point, and a smooth curve is used to connect the temperature difference points in sequence to obtain a temperature difference index changing with time relationship diagram;

[0041] Draw a tangent to the curve at the temperature difference point, and calculate the slope of the tangent to obtain the temperature difference slope of each temperature difference point; when the temperature difference slope is greater than zero, it means that the temperature difference index at the temperature difference point presents an upward trend, indicating that at the temperature difference point, the temperature unevenness of the energy storage device is in a state of continued deterioration; when the temperature difference slope is less than zero, it means that the temperature difference index at the temperature difference point presents a downward trend, indicating that at the temperature difference point, the temperature unevenness of the energy storage device is in a state of continued improvement; the number of temperature difference slopes greater than zero is recorded as M7, and the temperature difference slopes greater than zero are summed up to obtain the temperature difference deterioration degree, recorded as N5; the number of temperature difference slopes less than zero is recorded as M8, and the temperature difference slopes less than zero are summed up to obtain the temperature difference improvement degree, recorded as N6; the number of temperature difference slopes equal to zero is recorded as M9; using the set formula The temperature difference change index Mc is calculated, where c4, c5, c6, and c7 are respectively the set proportional coefficients;

[0042] Charging state feature extraction:

[0043] Retrieve the charging parameters corresponding to each acquisition moment, where the charging parameters include the actual charging capacity and the actual charging current, and record them as C1j and C2j, respectively, where j = 1, 2, 3 ... J, J is a positive integer, J represents the total number of acquisition moments, and j represents the sequence number of any acquisition moment;

[0044] Different types of energy storage devices are set to correspond to different standard charging capacities and standard charging flows. It should be noted that the standard charging capacity and standard charging flow are determined by the manufacturing process of the energy storage device. The closer the actual charging capacity and actual charging flow are to the standard charging capacity and standard charging flow, it usually means that the device can operate under more ideal conditions when charging, thereby reducing the degree of attenuation of the charging performance of the energy storage device; the type of energy storage device is compared with all the types of energy storage devices set to match the corresponding standard charging capacity and standard charging flow, and they are recorded as HC1 and HC2 respectively; using the set formula The charging index Caj corresponding to each acquisition moment is calculated, where a1 and a2 are the set proportional coefficients respectively; it can be seen from the formula that when the actual charging capacity is closer to the standard charging capacity (i.e. The closer it is to zero), the closer the actual charging flow is to the standard charging flow (i.e. The closer it is to zero), the better the charging state of the energy storage device, and the greater the charging index; a two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the charging index as the vertical coordinate, the charging index is input into the coordinate system according to its corresponding collection time, and the position of the charging index in the coordinate system is the charging point, and a smooth curve is used to connect the charging points in sequence to obtain a curve graph of the charging index changing with time;

[0045] Draw a tangent line at each charging point, and calculate the slope of the tangent line to obtain the charging slope of each charging point. The charging slope represents the changing trend of the charging index at the charging point. When the charging slope is greater than zero, it means that the charging index at the charging point is on an upward trend, indicating that at the charging point, the charging state of the energy storage device is improving; when the charging slope is less than zero, it means that the charging index at the charging point is on a downward trend, indicating that at the charging point, the charging state of the energy storage device is deteriorating; the number of charging slopes greater than zero is recorded as M1, and the charging slopes greater than zero are summed up to obtain the charging improvement degree, recorded as N1; the number of charging slopes less than zero is recorded as M2, and the charging slopes less than zero are summed up to obtain the charging deterioration degree, recorded as N2; the number of charging slopes equal to zero is recorded as M3; using the set formula The charging attenuation index Ma is calculated, where a3, a4, a5, and a6 are respectively the set proportional coefficients, and γ1 is the charging influence coefficient;

[0046] Discharge state feature extraction:

[0047] Retrieve the discharge parameters corresponding to each acquisition moment, where the discharge parameters include the actual discharge capacity and the actual discharge flow, and record them as F1j and F2j respectively; set different types of energy storage devices to correspond to different standard discharge capacities and standard discharge currents. It should be noted that the standard discharge capacity and standard discharge current are determined by the manufacturing process of the energy storage device, and the closer the actual discharge capacity and the actual discharge flow are to the standard discharge capacity and the standard discharge current, it usually means that the device can operate under more ideal conditions during discharge, thereby reducing the degree of attenuation of the discharge performance of the energy storage device; compare the type of energy storage device with all the set types of energy storage devices to match the corresponding standard discharge capacity and standard discharge flow, and record them as HF1 and HF2 respectively; use the set formula The discharge index Fb is calculated, where b1 and b2 are the set proportional coefficients. It can be seen from the formula that the closer the actual discharge capacity is to the standard charge capacity (i.e. The closer it is to zero), the closer the actual discharge flow is to the standard discharge flow (i.e. The closer to zero), the better the discharge state of the energy storage device, and the greater the discharge index; a two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the discharge index as the vertical coordinate, the discharge index is input into the coordinate system according to its corresponding collection time, and the position of the discharge index in the coordinate system is the discharge point, and a smooth curve is used to connect the discharge points in sequence to obtain a curve graph of the discharge index changing with time;

[0048] Draw a tangent line at each discharge point, and calculate the tangent slope to obtain the discharge slope of each discharge point. The discharge slope represents the change trend of the discharge index at the discharge point. When the discharge slope is greater than zero, it means that the discharge index at the discharge point is on an upward trend, indicating that at the discharge point, the discharge state of the energy storage device is improving; when the discharge slope is less than zero, it means that the discharge index at the discharge point is on a downward trend, indicating that at the discharge point, the discharge state of the energy storage device is deteriorating; the number of discharge slopes greater than zero is recorded as M4, and the discharge slopes greater than zero are summed up to obtain the discharge improvement degree, recorded as N3; the number of discharge slopes less than zero is recorded as M5, and the discharge slopes less than zero are summed up to obtain the discharge deterioration degree, recorded as N4; the number of discharge slopes equal to zero is recorded as M6; using the set formula The discharge attenuation index Mb is calculated, where b3, b4, b5, and b6 are the set proportional coefficients, and γ2 is the discharge influence coefficient;

[0049] The temperature difference change index Mc, the charge attenuation index Ma, and the discharge attenuation index Mb are recorded as state characteristic parameters and sent to the intelligent management module;

[0050] By extracting features from the operating status, charging status, and discharging status of distributed energy storage devices, and comprehensively considering multiple indicators such as temperature distribution and charging and discharging performance, it is possible to comprehensively and objectively evaluate the status of energy storage devices, help managers understand the operating status of the equipment more accurately, and provide important technical support for the realization of intelligent management of distributed energy storage devices.

[0051] The intelligent management module manages the energy storage equipment through state characteristic parameters to maximize the utilization of the energy storage equipment; specifically:

[0052] Retrieve the state characteristic parameters of the energy storage device, where the state characteristic parameters include the temperature difference change index Mc, the charge attenuation index Ma, and the discharge attenuation index Mb. Use the set formula DM=d1×Mc+d2×Ma+d3×Mb to calculate the management value DM of each energy storage device, where d1, d2, and d3 are the set proportional coefficients respectively; when the management value is greater than the maximum value in the set management interval, it means that the energy storage device corresponding to the management value has a very large safety hazard, then a switching instruction is generated, and it is controlled to switch to the backup energy storage device; when the management value is within the set management interval, the energy storage device corresponding to the management value is recorded as a control energy storage device, and a maintenance instruction is generated to the corresponding engineer; when the management value is less than the minimum value in the set management interval, it means that the energy storage device corresponding to the management value is in good condition and the safety hazard can be ignored, then the energy storage device corresponding to the management value is recorded as a coordination energy storage device; it should be noted that the distributed energy storage devices are in a series relationship;

[0053] The energy storage equipment is regulated to execute energy storage regulation measures until the maintenance completion instruction is received from the engineer; the energy storage regulation measures are specifically:

[0054] Step 1: Obtain the storage capacity of each coordinated energy storage device. When the storage capacity is less than the set storage capacity, the coordinated energy storage device is recorded as a primary coordinated device;

[0055] Step 2: Obtain the thread distance between each preliminary coordination device and the regulating energy storage device, and record it as Vg. It should be noted that the thread distance refers to the line length between the preliminary coordination device and the regulating energy storage device; use the set formula Calculate and obtain the coordination value VF of each preliminary coordination device and the regulating energy storage device, where f1 and f2 are respectively the set proportional coefficients; select the preliminary coordination device with the largest coordination value as the target coordination device for regulating the energy storage device;

[0056] Step 3: Divide the management value corresponding to the regulated energy storage device by the set reserve constant (the reserve constant is set by the technicians in this field) to obtain the standard reserve of the regulated energy storage device. When the storage capacity of the regulated energy storage device reaches the standard reserve, the electric energy flowing to the regulated energy storage device is controlled to be transmitted to the target coordination device, so as to optimize the electric energy storage of the distributed energy storage device, ensure the safe operation of the distributed energy storage device, and minimize the safety problems caused by the sudden failure of the energy storage device to the power grid. It should be noted that the larger the management value corresponding to the regulated energy storage device, the smaller the corresponding standard reserve, which means that the state of the regulated energy storage device is worse and the greater the safety risk.

[0057] Step 4: Obtain the number of charge and discharge times of the energy storage device and the start time, end time, and charge and discharge amount corresponding to each charge and discharge, calculate the time difference between the start time and the end time of each charge of the energy storage device to obtain the charging time of each charge, and divide the charge amount by the charging time to obtain the charging efficiency of each charge; similarly, calculate the time difference between the start time and the end time of each discharge of the energy storage device to obtain the discharge time of each discharge, and divide the discharge amount by the discharge time to obtain the discharge efficiency of each discharge; sum up the charging efficiency corresponding to each charge to obtain the cumulative value of the charging efficiency and record it as T1, and sum up the discharge efficiency corresponding to each discharge to obtain the cumulative value of the discharge efficiency and record it as T2;

[0058] Compare and analyze the charging efficiency with the set charging interval. When the charging efficiency is greater than the maximum value in the set charging interval, a high charging efficiency is accumulated; when the charging efficiency is within the set charging interval, a medium charging efficiency is accumulated; when the charging efficiency is less than the minimum value in the set charging interval, a low charging efficiency is accumulated; the accumulated times of high charging efficiency, medium charging efficiency and low charging efficiency are counted respectively, and recorded as A1, A2 and A3 respectively;

[0059] Compare and analyze the discharge efficiency with the set discharge interval. When the discharge efficiency is greater than the maximum value in the set discharge interval, a high discharge efficiency is accumulated; when the discharge efficiency is within the set discharge interval, a medium discharge efficiency is accumulated; when the discharge efficiency is less than the minimum value in the set discharge interval, a low discharge efficiency is accumulated; the accumulated times of high discharge efficiency, medium discharge efficiency and low discharge efficiency are counted respectively, and recorded as B1, B2 and B3 respectively;

[0060] Using the set formula group Calculate and obtain the charging influence coefficient γ1 and the discharging influence coefficient γ2, wherein they are respectively the set proportional coefficients; send the charging influence coefficient γ1 and the discharging influence coefficient γ2 to the state extraction module;

[0061] By monitoring the temperature difference change index, charging attenuation index and discharging attenuation index for comprehensive analysis and judgment, the potential safety hazards of energy storage equipment can be identified in a timely manner. When the management value exceeds the set management range, the system can quickly generate a switching instruction to switch the energy storage equipment with potential safety hazards to the backup equipment, thereby effectively avoiding possible safety accidents. At the same time, by regulating the energy storage equipment to execute energy storage regulation measures, the energy storage optimization of distributed energy storage equipment with safety risks is achieved, which can maximize the use of the capacity of the energy storage equipment while ensuring the safety of the regulated energy storage equipment and improve the power supply efficiency of the power grid.

[0062] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A comprehensive management system for distributed energy storage equipment, characterized in that: include: Status extraction module and intelligent management module; The state extraction module extracts state features based on the state information of the energy storage device to obtain state feature parameters, wherein the state feature parameters include a temperature difference change index, a charging attenuation index, and a discharging attenuation index; the state extraction includes operating state feature extraction, charging state extraction, and discharging state extraction; The intelligent management module determines the state of the energy storage device based on the state characteristic parameters and generates corresponding measures; specifically: The temperature difference change index Mc, charge attenuation index Ma, and discharge attenuation index Mb of the energy storage device are retrieved, and the management value DM of each energy storage device is calculated through the set formula DM=d1×Mc+d2×Ma+d3×Mb, where d1, d2, and d3 are respectively the set proportional coefficients; when the management value is greater than the maximum value in the set management interval, a switching instruction is generated and switched to the backup energy storage device; when the management value is within the set management interval, the energy storage device corresponding to the management value is recorded as a control energy storage device, and a maintenance instruction is generated and sent to the corresponding engineer; when the management value is less than the minimum value in the set management interval, the energy storage device corresponding to the management value is recorded as a coordination energy storage device; The energy storage equipment is regulated to execute energy storage regulation measures until the maintenance completion instruction is received from the corresponding engineer; the energy storage regulation measures are specifically: Step 1: Obtain the storage capacity of each coordinated energy storage device. When the storage capacity is less than the set storage capacity, the coordinated energy storage device is recorded as a primary coordinated device; Step 2: Obtain the thread distance between each preliminary coordination device and the regulating energy storage device, and perform a formula calculation and analysis on it and the management value to obtain the coordination value of each preliminary coordination device and the regulating energy storage device, and select the preliminary coordination device with the largest coordination value as the target coordination device of the regulating energy storage device; Step 3: Divide the management value corresponding to the regulated energy storage device by the set reserve constant to obtain the standard reserve of the regulated energy storage device. When the storage capacity of the regulated energy storage device reaches the standard reserve, the electric energy flowing to the regulated energy storage device is controlled to be transmitted to the target coordination device.

2. The integrated management system for distributed energy storage equipment according to claim 1, characterized in that: The specific process of running status feature extraction is as follows: Retrieve the three-dimensional temperature distribution diagram of the equipment corresponding to each acquisition moment, divide the three-dimensional temperature distribution diagram into several blocks, identify the color corresponding to each interval to obtain the chromatogram value corresponding to each block, and compare and analyze them to obtain the temperature index; construct a two-dimensional rectangular coordinate system with time as the horizontal coordinate and the temperature difference index as the vertical coordinate, input the temperature difference index into the coordinate system according to the corresponding acquisition moment, and record the position of the temperature difference index in the coordinate axis as the temperature difference point, use a smooth curve to connect the temperature difference points in sequence to obtain a relationship diagram of the temperature difference index changing with time; perform graphical analysis on the relationship diagram of the temperature difference index changing with time to obtain the temperature change index.

3. The integrated management system of a distributed energy storage device according to claim 2, characterized in that: The specific process of graphic analysis is as follows: Draw a tangent line of the curve at the temperature difference point, and calculate the slope of the tangent line to obtain the temperature difference slope of each temperature difference point; count the number of temperature difference slopes greater than zero, and sum the temperature difference slopes greater than zero to obtain the temperature difference deterioration degree; Count the number of temperature difference slopes less than zero, and sum the temperature difference slopes less than zero to obtain the temperature difference improvement degree; count the number of temperature difference slopes equal to zero; A charging influence coefficient is set for each energy storage device, and the temperature difference change index is obtained by formulating and analyzing the number of temperature difference slopes greater than zero, the temperature difference deterioration degree, the number of temperature difference slopes less than zero, the temperature difference improvement degree, and the number of temperature difference slopes equal to zero.

4. The integrated management system for distributed energy storage equipment according to claim 1, characterized in that: The specific process of charging state extraction is: Retrieve the charging parameters corresponding to each acquisition moment, where the charging parameters include the actual charging capacity and the actual charging current, and record them as C1j and C2j, respectively, where j = 1, 2, 3 ... J, J is a positive integer, J represents the total number of acquisition moments, and j represents the sequence number of any acquisition moment; compare the type of energy storage device with all the set types of energy storage devices to match the corresponding standard charging capacity and standard charging flow, and record them as HC1 and HC2 respectively; use the set formula The charging index Caj corresponding to each acquisition moment is calculated, where a1 and a2 are the set proportional coefficients respectively; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the charging index as the vertical coordinate. The charging index is input into the coordinate system according to its corresponding collection time, and the position of the charging index in the coordinate system is the charging point. A smooth curve is used to connect the charging points in sequence to obtain a curve graph of the charging index changing with time. The charging index is analyzed graphically over time to obtain the charging attenuation index.

5. The integrated management system for distributed energy storage equipment according to claim 1, characterized in that: The specific process of discharge state extraction is: Retrieve the discharge parameters corresponding to each acquisition moment, where the discharge parameters include the actual discharge capacity and the actual discharge flow, and record them as F1j and F2j respectively; compare the type of energy storage device with all the set types of energy storage devices to match the corresponding standard discharge capacity and standard discharge flow, and record them as HF1 and HF2 respectively; use the set formula The discharge index Fbj is calculated, where b1 and b2 are respectively the set proportional coefficients; A two-dimensional rectangular coordinate system is constructed with time as the horizontal axis and the discharge index as the vertical axis. The discharge index is input into the coordinate system according to its corresponding collection time, and the position of the discharge index in the coordinate system is taken as the discharge point. A smooth curve is used to connect the discharge points in sequence to obtain a curve graph of the discharge index changing with time. A graphical analysis is performed on the curve graph of the discharge index changing with time to obtain the discharge attenuation index.

6. The integrated management system for distributed energy storage equipment according to claim 1, characterized in that: The intelligent management module is also used to analyze the historical charge and discharge records of the energy storage device to obtain the charge and discharge influence coefficient. The specific analysis process is as follows: Obtain the number of charge and discharge times of the energy storage device and the start time, end time, and charge and discharge amount corresponding to each charge and discharge, calculate the time difference between the start time and end time of each charge of the energy storage device to obtain the charging time of each charge, and divide the charge amount by the charging time to obtain the charging efficiency of each charge; similarly, the discharge efficiency of each discharge can be obtained; The charging efficiency corresponding to each charge is summed up to obtain a cumulative charging efficiency value, and the discharge efficiency corresponding to each discharge is summed up to obtain a cumulative discharge efficiency value; Compare and analyze the charging efficiency with the set charging interval to divide the charging efficiency into high charging efficiency, medium charging efficiency and low charging efficiency, and count the cumulative times of high charging efficiency, medium charging efficiency and low charging efficiency respectively; Compare and analyze the discharge efficiency with the set discharge interval to divide the discharge efficiency into high discharge efficiency, medium discharge efficiency and low discharge efficiency, and count the cumulative times of high discharge efficiency, medium discharge efficiency and low discharge efficiency respectively; The cumulative value of charging efficiency, the cumulative value of discharging efficiency, the cumulative number of high charging efficiency, the cumulative number of medium charging efficiency, the cumulative number of low charging efficiency, the cumulative number of high discharging efficiency, the cumulative number of medium discharging efficiency and the cumulative number of low discharging efficiency are formulated and analyzed to obtain the charging influence coefficient and the discharging influence coefficient, and the charging influence coefficient and the discharging influence coefficient are sent to the state extraction module.

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