A method and system for online maintenance of substation batteries

Abstract

The present invention discloses an online maintenance method and system for a substation battery, and relates to the technical field of battery maintenance. The method controls a target battery in a substation to supply power to a detection load in response to a discharge instruction obtained according to a preset detection frequency, determines whether the operating parameters of the target battery during the discharge process meet preset conditions, and when the preset conditions are not met, performs maintenance on the target battery until the operating parameters meet the preset conditions, and finally controls the target battery to stop supplying power to the detection load and charges the target battery. This solves the problem in the prior art that battery maintenance through online or offline detection cannot detect battery faults in time, which easily affects the normal operation of the substation. By detecting the operating parameters of the target battery when supplying power to the detection load in the substation at a preset detection frequency, online regular maintenance of the target battery is achieved, battery faults are detected in time, and reliable operation of the substation is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery maintenance, and more specifically, to an online maintenance method and system for a substation battery. Background Art

[0002] With the development of power grids, batteries are an important part of the DC power supply system in the power supply system. As a DC power supply, it is mainly responsible for providing safe, stable and reliable power guarantee for the secondary system load in the power system, and ensuring the normal operation of relay protection and communication equipment. In the case of a complete shutdown of the substation, the AC input of the DC system disappears, the charging module stops working, and only the battery pack can provide DC power for the equipment. When the station loses power, the battery provides power for the protection device, communication device, and control device to ensure that the protection device can reliably cut off the fault when a fault occurs. The battery in the substation is the emergency power supply for the electricity used, and it can be said to be the last line of defense for the safety of the substation. Therefore, ensuring the safety of the battery is related to the emergency response capability of the entire substation.

[0003] However, the current maintenance work for batteries in substations usually includes online monitoring and offline testing after disconnecting from the DC bus. In the actual operation or charging process of the battery, only online monitoring can detect the faults and potential risks of the battery, which is easy to affect the normal operation of the substation. Offline testing requires disconnecting the battery from the DC bus of the substation and then manually testing the battery. Not only is the operation cumbersome and consumes a lot of manpower and material resources, but it may also fail to detect battery faults in time. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for online maintenance of substation batteries, so as to solve the problem that in the prior art, battery maintenance through online detection or offline detection cannot detect battery faults in time, which easily affects the normal operation of the substation. By detecting the operating parameters of the target battery when supplying power to the detection load in the substation at a preset detection frequency, online regular maintenance of the target battery is achieved, thereby detecting battery faults in time and ensuring reliable operation of the substation.

[0005] In a first aspect, the present invention provides a method for online maintenance of a substation battery, comprising:

[0006] Obtaining a discharge instruction, wherein the discharge instruction is generated at a preset detection frequency;

[0007] In response to the discharge instruction, control the target storage battery in the substation to supply power to the detection load, wherein the detection load is a load preselected from the loads with the lowest priority in the substation, and the priority is divided based on the demand of each load in the substation for power supply reliability;

[0008] Acquiring operating parameters of the target battery during the discharge process, and determining whether the operating parameters meet preset conditions;

[0009] When the operating parameter does not satisfy the preset condition, maintaining the target battery until the operating parameter satisfies the preset condition;

[0010] The target battery is controlled to stop supplying power to the detection load, and the target battery is charged.

[0011] In a preferred solution, the operating parameters include single cell voltage and internal resistance of the target battery.

[0012] In a preferred solution, the preset condition is that the target battery does not have a single cell whose cell voltage is higher than a first preset voltage standard or lower than a second preset voltage standard, and the internal resistance of the target battery is lower than a preset resistance standard.

[0013] In a preferred solution, the maintaining of the target battery includes:

[0014] Performing discharge balancing on the single cell batteries whose voltage is higher than the first preset voltage standard;

[0015] Supplementary charging of the single cell battery whose voltage is lower than the second preset voltage standard;

[0016] When the internal resistance of the target battery is higher than the preset resistance standard, a forward spike pulse excitation maintenance is performed on the target battery.

[0017] In a preferred solution, the substation battery online maintenance method further includes:

[0018] Real-time monitoring of the ambient temperature around the target battery;

[0019] When the ambient temperature exceeds the upper limit of the preset temperature range, cooling the surrounding environment of the target battery;

[0020] When the ambient temperature exceeds a lower limit of the preset temperature range, the ambient temperature of the target battery is increased.

[0021] In a preferred solution, the preset detection frequency is determined based on the service life and usage pattern of the target battery.

[0022] In a preferred solution, the substation battery online maintenance method further includes:

[0023] Get charging instructions;

[0024] In response to the charging instruction, charging the target battery according to a preset charging strategy;

[0025] Among them, the preset charging strategy is determined based on the charging and discharging parameters of the target battery and the preset optimal charging strategy. The charging and discharging parameters include: voltage, current, single cell voltage, internal resistance and temperature. The preset optimal charging strategy is a charging strategy that enables a new battery of the same type as the target battery and without aging to achieve the optimal charging effect.

[0026] In a preferred solution, the method for determining the preset charging strategy includes:

[0027] Acquiring charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process as actual charging and discharging parameters;

[0028] Based on the actual charge and discharge parameters, determining the actual state of the target battery during the next charging process and the fitness of the charging strategy based on which the charging process is performed;

[0029] Based on the actual state of the target battery, the fitness, and the temperature, the preset optimal charging strategy is adjusted to obtain the preset charging strategy.

[0030] In a second aspect, the present invention provides an online maintenance system for a substation battery, comprising:

[0031] A first acquisition unit, used for acquiring a discharge instruction, wherein the discharge instruction is generated at a preset detection frequency;

[0032] a first execution unit, configured to control a target storage battery in the substation to supply power to a detection load in response to the discharge instruction, wherein the detection load is a load preselected from loads with the lowest priority in the substation, and the priority is divided based on the demand for power supply reliability of each load in the substation;

[0033] a second acquisition unit, used to obtain operating parameters of the target battery during the discharge process, and determine whether the operating parameters meet preset conditions;

[0034] a second execution unit, configured to, when the operating parameter does not satisfy the preset condition, perform maintenance on the target battery until the operating parameter satisfies the preset condition;

[0035] The third execution unit is used to control the target battery to stop supplying power to the detection load and to charge the target battery.

[0036] In a third aspect, the present invention provides a substation, which includes a substation body and a substation battery online maintenance system as provided in the second aspect.

[0037] In order to achieve the above-mentioned purpose, the present invention provides a method and system for online maintenance of substation batteries. After obtaining a discharge instruction, in response to the discharge instruction, the target battery in the substation is controlled to supply power to the pre-selected detection load from the load with the lowest priority in the substation. The priority is divided based on the demand for power supply reliability of each load in the substation, so that on the one hand, when the battery is maintained online, the battery power will not be wasted. On the other hand, the operating parameters of the target battery during the discharge process can be obtained to determine whether the target battery needs maintenance by determining whether the operating parameters meet the preset conditions. That is, when it is determined that the operating parameters do not meet the preset conditions, the target battery is maintained until the operating parameters meet the preset conditions, thereby achieving the purpose of online maintenance of the target battery and timely detection of battery faults. Finally, by controlling the target battery to stop supplying power to the detection load and charging the target battery, the reliable operation of the substation when it needs to be powered by the target battery is met. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flow chart of a method for online maintenance of substation batteries provided for the implementation of the present invention.

[0039] Figure 2 This is a curve diagram showing the relationship between the service life of a valve-regulated lead-acid battery and the float charge voltage and temperature.

[0040] Figure 3 This is a curve diagram showing the relationship between the service life of a valve-regulated lead-acid battery and temperature compensation.

[0041] Figure 4 A structural diagram of a substation battery online maintenance system provided by an embodiment of the present invention.

[0042] Figure 5 A structural diagram of another substation battery online maintenance system provided in an embodiment of the present invention.

[0043] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below through the accompanying drawings and specific embodiments.

[0045] It is understandable that the battery will hardly discharge when not in operation, while the battery in the substation is charged in the floating charge state. For batteries that are not in operation, online monitoring cannot detect potential faults of the battery, and the battery parameters collected in the floating charge state cannot truly reflect the health status of the battery.

[0046] Furthermore, although offline testing can effectively detect battery failures and potential risks, it is necessary to disconnect the battery from the DC bus and then test the battery through nuclear capacity discharge and other testing methods. This process not only consumes a lot of manpower and material resources, but also wastes the battery power. At the same time, if the offline testing cycle is not arranged reasonably, it is easy to cause the problem of untimely detection of battery failures.

[0047] In order to solve the above problems, the present invention provides a method for performing online maintenance on a target battery by analyzing the operating parameters of the target battery when it supplies power to a specific load in a substation according to a preset detection frequency, thereby avoiding waste of battery power on the one hand, and discovering potential battery failures in advance on the other hand, and effectively improving the health management level of the substation power supply system and battery.

[0048] The substation battery online maintenance method provided by the present invention is executed on an electronic device, which may be a controller configured on the substation, or a controller independent of the substation, or an intelligent terminal device such as a laptop, a personal computer, and a tablet computer that can be connected to the substation. Of course, in some cases, it may also be a server on the network side.

[0049] like Figure 1 As shown, the substation battery online maintenance method provided by the embodiment of the present invention mainly includes the following steps:

[0050] 110. Obtain a discharge instruction.

[0051] The discharge instruction is generated at a preset detection frequency.

[0052] Specifically, taking the example of executing the substation battery online maintenance method through a controller connected to the substation control and management system, a discharge instruction can be sent to the controller by the substation control and management system or the battery management system of the battery when the substation battery needs to be checked, so that the controller can perform online maintenance on the substation battery after obtaining the discharge instruction.

[0053] More specifically, the preset detection frequency is set based on experience and the historical failure frequency of the target battery, etc., and is not specifically limited here.

[0054] 120. In response to the discharge instruction, control the target storage battery in the substation to supply power to the detection load.

[0055] The detection load is a load preselected from the loads with the lowest priority in the substation. The priority is divided based on the demand for power supply reliability of each load in the substation.

[0056] Specifically, taking a common substation as an example, the loads connected to it have different requirements for power supply reliability. For example, medical departments such as hospitals and pharmacies have higher requirements for power supply reliability, while general residential power supply has lower requirements for power supply reliability. Therefore, based on the different requirements of different loads for power supply reliability, the loads connected to the substation can be prioritized. For example, medical departments such as hospitals and pharmacies are given the highest priority, followed by network communication departments and government functional departments, factories, schools, commercial departments, etc., and residential power supply has the lowest priority.

[0057] More specifically, after the loads connected to the substation are prioritized according to the requirements for power supply reliability, the detection load can be selected from the loads with the lowest priority, thereby avoiding the impact of power supply fluctuations on the detection load when using a load with a higher priority as the detection load and switching from AC power supply to the target battery.

[0058] It is understandable that the selection of the detection load is usually determined based on the power supply requirements of the target battery. For example, taking the requirement of constant current core capacity discharge of the target battery as an example, constant current core capacity discharge generally requires constant current discharge with a current of 0.1C of the target battery. Therefore, a load with a demand current or a sum of demand currents of 0.1C can be selected as the detection load from the loads with the lowest priority, and then when the controller responds to the discharge instruction, the target battery is controlled to power the detection load, so as to detect and maintain the health status of the target battery during the discharge process of the target battery, and also realize the online core capacity discharge of the target battery.

[0059] 130. Obtain operating parameters of the target battery during the discharge process, and determine whether the operating parameters meet preset conditions.

[0060] It is understandable that a battery is composed of multiple cells. When the voltage or internal resistance of multiple cells is unbalanced, the performance of the entire battery will be affected. Therefore, maintaining the voltage and internal resistance balance between the cells in the battery is an important means to extend the battery life and ensure battery performance.

[0061] Based on this, in an optional embodiment, the operating parameters include the single cell voltage and internal resistance of the target battery.

[0062] It should be noted that the single cell voltage and internal resistance are two important parameters that affect the performance and life of the battery. In order to further improve the accuracy of detecting the health status of the target battery, in some optional embodiments, the operating parameters may also include pole temperature, discharge current, etc., which are not specifically limited here.

[0063] It is understandable that the internal resistance of the battery is generally very small and can be ignored under low current conditions, but will cause a large voltage divider effect under high current conditions. Therefore, the smaller the internal resistance of the battery, the better. At the same time, the progress of the chemical reaction inside the battery will affect the size of the battery's internal resistance. As the degree of battery degradation continues to increase, the size of the battery's internal resistance tends to increase.

[0064] Furthermore, when the voltages of the cells in the battery are unbalanced, a "lagging cell" will be generated, which will cause the cell to fail, thereby affecting the performance of the entire battery.

[0065] Based on this, in an optional embodiment, the preset condition can be set as: the target battery does not have a single cell whose cell voltage is higher than the first preset voltage standard or lower than the second preset voltage standard, and the internal resistance of the target battery is lower than the preset resistance standard.

[0066] 140. When the operating parameters do not meet the preset conditions, the target battery is maintained until the operating parameters meet the preset conditions.

[0067] It should be noted that the change in the internal resistance of the battery and the balance of the single cell voltage are linearly related to the performance of the battery. By detecting the size of the internal resistance of the battery cells, deteriorated cells and cells with too low or too high cell voltage can be found and maintained in time to prevent the battery performance from being affected by cell damage.

[0068] Based on this, in an optional embodiment, maintaining the target battery includes:

[0069] Performing discharge balancing on the single cell battery whose voltage is higher than the first preset voltage standard;

[0070] Supplementary charging of single cell batteries whose voltage is lower than a second preset voltage standard;

[0071] When the internal resistance of the target battery is higher than the preset resistance standard, the target battery is subjected to forward spike pulse excitation maintenance.

[0072] Specifically, when it is determined that the operating parameters do not meet the preset conditions, the method provided in the above embodiment is used to maintain the target battery until the operating parameters of the target battery meet the preset conditions, so that the target battery can be maintained online under normal operation of the substation, thereby effectively improving the service life of the battery, and timely discovering potential faults of the battery, thereby ensuring the reliable operation of the substation.

[0073] 150. Control the target battery to stop supplying power to the detection load and charge the target battery.

[0074] Specifically, after the operating parameters of the target battery meet the preset conditions, the target battery is controlled to stop supplying power to and charging the detection load, so that the online maintenance of the target battery can be fully operated, while ensuring that the target battery has sufficient power to ensure the reliability of the substation when it needs to be powered by the target battery.

[0075] It is understandable that most substations currently use valve-regulated lead-acid batteries. The life of valve-regulated lead-acid batteries is closely related to the ambient temperature. For example: Figure 2 The relationship between the life of valve-regulated lead-acid batteries and the floating charge voltage and ambient temperature is shown. Figure 2 It can be seen that the ambient temperature has a significant impact on the service life of the valve-regulated lead-acid battery. For example, when the floating charge voltage is 13.4V and the ambient temperature is 26℃, the life of the valve-regulated lead-acid battery is 11 years; when the ambient temperature is 56℃, the life of the valve-regulated sealed lead-acid battery is only 5 years. Therefore, it is beneficial to allow the valve-regulated lead-acid battery to work at an ambient temperature of about 26℃ to extend the life of the valve-regulated lead-acid battery.

[0076] Based on this, in order to improve the maintenance effect of the battery, in an optional embodiment, the substation battery online maintenance method is characterized by further comprising:

[0077] Real-time monitoring of the ambient temperature around the target battery;

[0078] When the ambient temperature exceeds the upper limit of the preset temperature range, the ambient temperature of the target battery is adjusted to reduce the temperature;

[0079] When the ambient temperature exceeds the lower limit of the preset temperature range, the ambient temperature of the target battery is increased and regulated.

[0080] Specifically, the ambient temperature around the target battery can be adjusted by the temperature compensation function of the rectifier.

[0081] More specifically, in some optional embodiments, the temperature regulation capability of the surrounding environment of the target battery can be further improved by providing a heat dissipation device and a heating resistor or other temperature increasing device around the target battery.

[0082] Further, Figure 3 The figure shows the relationship between the life and ambient temperature of a certain valve-regulated lead-acid battery obtained by temperature compensation test. Among them, η is the ratio between the actual service life of the battery and the ideal service life. Then Figure 3 It can be seen that after temperature compensation of the valve-regulated lead-acid battery, the actual service life is significantly improved.

[0083] It is understandable that by maintaining the substation battery according to a reasonable cycle, the battery failure and abnormal hidden dangers can be discovered in time, thereby ensuring the reliable operation of the substation. Therefore, if the cycle is set too long, it is easy to cause untimely maintenance, and if the cycle is set too short, it will waste resources and computing power.

[0084] Based on this, in an optional embodiment, the preset detection frequency is determined based on the service life and usage pattern of the target battery.

[0085] Specifically, each battery has its own service life. As the service life increases, the battery degradation will gradually increase. Therefore, the service life of the target battery has a great impact on the preset detection frequency. As the service life of the target battery increases, the preset detection frequency should be appropriately increased.

[0086] Furthermore, online maintenance of the battery needs to be performed away from the battery usage time to avoid affecting the normal operation of the substation. Therefore, the usage pattern of the target battery also has an impact on the preset detection frequency. Among them, there are many ways to obtain the usage pattern of the target battery, for example: by continuously recording the usage time of the target battery, to summarize the usage pattern of the target battery; by obtaining its operating parameters during the operation of the substation, and then learning to predict the abnormality of the substation AC power and the time when the target battery needs to be powered, and then obtain the usage pattern of the target battery, etc., which are not specifically limited here.

[0087] In this embodiment, by determining the preset detection frequency based on the service life and usage pattern of the target battery, the online maintenance cycle of the substation battery can be made more reasonable, thereby ensuring the timely discovery of faults and hidden dangers of the target battery.

[0088] It should be noted that if the charging control is unreasonable, it will also affect the performance of the battery. It is understandable that during the charging process, parameters such as voltage, current, single cell voltage, internal resistance and temperature all have an impact on the service life and performance of the battery. For example: by adjusting the input voltage of the battery, it can be ensured that the battery is charged within a safe range, thereby avoiding overcharging, thereby improving the service life and performance of the battery. By adjusting the temperature of the battery during charging, the battery can be prevented from overheating or overcooling, improving the safety and stability of the battery. By measuring the internal resistance, internal problems of the battery, such as aging or damage, can be detected, so that timely measures can be taken to improve the performance and life of the battery.

[0089] Based on this, in an optional embodiment, the substation battery online maintenance method further includes:

[0090] Get charging instructions;

[0091] In response to the charging instruction, charging the target battery according to a preset charging strategy;

[0092] Among them, the preset charging strategy is determined based on the charging and discharging parameters of the target battery and the preset optimal charging strategy. The charging and discharging parameters include: voltage, current, single cell voltage, internal resistance and temperature. The preset optimal charging strategy is a charging strategy that enables a new battery of the same type as the target battery and without aging to achieve the optimal charging effect.

[0093] Specifically, the whole life cycle of a battery is a process from a new battery without aging to gradually aging and needing to be replaced. Even for batteries of the same type, the degree of aging will be different due to differences in their working environment, charging and discharging parameters, and usage methods. Therefore, for batteries of the same type, the charging strategy that guarantees the charging effect of a new battery without aging is a representative and universal charging strategy. As the battery ages, the charging strategy that is more suitable for the current state of the battery is an update on this charging strategy.

[0094] Based on this, in an optional embodiment, a method for determining a preset charging strategy includes:

[0095] Acquire the charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process as actual charging and discharging parameters;

[0096] Based on the actual charging and discharging parameters, determine the actual state of the target battery during the next charging process and the fitness of the charging strategy based on which the charging process is performed;

[0097] Based on the actual state, fitness, and temperature of the target battery, the preset optimal charging strategy is adjusted to obtain a preset charging strategy.

[0098] Specifically, by analyzing the charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process, it is possible to determine whether the charging strategy executed by the target battery during the charging process can guarantee the charging effect of the target battery, and the actual state of the target battery can be determined. Then, the preset optimal charging strategy is adjusted based on the actual state, fitness and temperature of the target battery to obtain the preset charging strategy.

[0099] It is understandable that the preset optimal charging strategy can be determined by charging a new battery under different ambient temperatures and charging parameters. Therefore, the preset optimal charging strategy obtained includes not only parameters such as input voltage and current, but also the appropriate charging temperature.

[0100] In this embodiment, by setting the basis for adjusting the preset optimal charging strategy to the actual state of the target battery, the adaptability of the charging strategy based on which the last charging process was performed, and the temperature, it can be ensured that the adjusted preset charging strategy is consistent with the current health state and environment of the target battery, thereby further improving the maintenance effect on the target battery.

[0101] In some optional embodiments, the actual state of the target battery during the next charging process is predicted by inputting the acquired charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process into a time series prediction model.

[0102] Furthermore, the time series prediction model is trained based on the historical charge and discharge parameters of the target battery and batteries of the same type as the target battery, wherein the weight of each historical charge and discharge parameter in predicting the actual state of the target battery during the next charging process is automatically adjusted by algorithms such as particle swarm.

[0103] The substation battery online maintenance system provided in an embodiment of the present invention is introduced below. The substation battery online maintenance system described below can be considered as a module architecture for implementing the substation battery online maintenance method provided in an embodiment of the present invention; the content described below can be cross-referenced with the above.

[0104] Optional, see Figure 4 , Figure 4 This is a structural block diagram of a substation battery online maintenance system provided by an embodiment of the present invention. The system may include:

[0105] A first acquisition unit 10 is used to obtain a discharge instruction, where the discharge instruction is generated at a preset detection frequency;

[0106] A first execution unit 20, configured to control a target storage battery in the substation to supply power to a detection load in response to a discharge instruction, wherein the detection load is a load preselected from loads with the lowest priority in the substation, and the priority is divided based on the demand for power supply reliability of each load in the substation;

[0107] The second acquisition unit 30 is used to obtain the operating parameters of the target battery during the discharge process and determine whether the operating parameters meet the preset conditions;

[0108] The second execution unit 40 is used to perform maintenance on the target battery when the operating parameters do not meet the preset conditions until the operating parameters meet the preset conditions;

[0109] The third execution unit 50 is used to control the target battery to stop supplying power to the detection load and to charge the target battery.

[0110] Optionally, the operating parameters include single cell voltage and internal resistance of the target battery.

[0111] Optionally, the preset condition is that the target battery does not have a single cell whose cell voltage is higher than a first preset voltage standard or lower than a second preset voltage standard, and the internal resistance of the target battery is lower than a preset resistance standard.

[0112] Optionally, the second execution unit 40 is specifically configured to:

[0113] Performing discharge balancing on the single cell battery whose voltage is higher than the first preset voltage standard;

[0114] Supplementary charging of single cell batteries whose voltage is lower than a second preset voltage standard;

[0115] When the internal resistance of the target battery is higher than the preset resistance standard, the target battery is subjected to forward spike pulse excitation maintenance.

[0116] Optional, see Figure 5 , Figure 5 FIG. 1 is a structural block diagram of another substation battery online maintenance system provided by an embodiment of the present invention. Figure 4 Based on the embodiment shown, the system further includes:

[0117] The fourth execution unit 60 is used to monitor the ambient temperature around the target battery in real time;

[0118] When the ambient temperature exceeds the upper limit of the preset temperature range, the ambient temperature of the target battery is adjusted to reduce the temperature;

[0119] When the ambient temperature exceeds the lower limit of the preset temperature range, the ambient temperature of the target battery is increased and regulated.

[0120] Optionally, the preset detection frequency is determined based on the age and usage pattern of the target battery.

[0121] Optional, see Figure 5 , the system further comprises:

[0122] A fifth execution unit 70, configured to obtain a charging instruction;

[0123] In response to the charging instruction, charging the target battery according to a preset charging strategy;

[0124] Among them, the preset charging strategy is determined based on the charging and discharging parameters of the target battery and the preset optimal charging strategy. The charging and discharging parameters include: voltage, current, single cell voltage, internal resistance and temperature. The preset optimal charging strategy is a charging strategy that enables a new battery of the same type as the target battery and without aging to achieve the optimal charging effect.

[0125] Optionally, the fifth execution unit 70 is further configured to:

[0126] Acquire the charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process as actual charging and discharging parameters;

[0127] Based on the actual charging and discharging parameters, determine the actual state of the target battery during the next charging process and the fitness of the charging strategy based on which the charging process is performed;

[0128] Based on the actual state, fitness, and temperature of the target battery, the preset optimal charging strategy is adjusted to obtain a preset charging strategy.

[0129] Optionally, an embodiment of the present invention further provides a substation, including a substation body and a substation battery online maintenance system as provided in any of the above embodiments.

[0130] Below, reference Figure 6 To describe the electronic device provided by the embodiment of the present application, the electronic device provided by the embodiment may include: at least one processor 100, at least one communication interface 200, at least one memory 300 and at least one communication bus 400;

[0131] In the embodiment of the present invention, the number of the processor 100, the communication interface 200, the memory 300, and the communication bus 400 is at least one, and the processor 100, the communication interface 200, and the memory 300 communicate with each other through the communication bus 400; obviously, Figure 6 The communication connections shown for the processor 100, the communication interface 200, the memory 300, and the communication bus 400 are merely optional;

[0132] Optionally, the communication interface 200 may be an interface of a communication module, such as an interface of a GSM module; the processor 100 may be a central processing unit CPU, or an application specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0133] The memory 300 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0134] The processor 100 is specifically used to execute the application program in the memory to implement the steps of the above-mentioned crane hoisting wire rope installation control method.

[0135] The above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for online maintenance of a substation battery, characterized in that: include: Obtaining a discharge instruction, wherein the discharge instruction is generated at a preset detection frequency; In response to the discharge instruction, control the target storage battery in the substation to supply power to the detection load, wherein the detection load is a load preselected from the loads with the lowest priority in the substation, and the priority is divided based on the demand of each load in the substation for power supply reliability; Acquiring operating parameters of the target battery during the discharge process, and determining whether the operating parameters meet preset conditions; When the operating parameter does not satisfy the preset condition, maintaining the target battery until the operating parameter satisfies the preset condition; Controlling the target battery to stop supplying power to the detection load and charging the target battery; Get charging instructions; In response to the charging instruction, charging the target battery according to a preset charging strategy; The preset charging strategy is determined based on the charging and discharging parameters of the target battery and the preset optimal charging strategy. The charging and discharging parameters include voltage, current, single cell voltage, internal resistance and temperature. The preset optimal charging strategy is a charging strategy that enables a new battery of the same type as the target battery and without aging to achieve the optimal charging effect. The method for determining the preset charging strategy includes: Acquiring charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process as actual charging and discharging parameters; Based on the actual charge and discharge parameters, determining the actual state of the target battery during the next charging process and the fitness of the charging strategy based on which the charging process is performed; Based on the actual state of the target battery, the fitness, and the temperature, the preset optimal charging strategy is adjusted to obtain the preset charging strategy.

2. The method for online maintenance of substation batteries according to claim 1, characterized in that: The operating parameters include the single cell voltage and internal resistance of the target battery.

3. The method for online maintenance of substation batteries according to claim 2, characterized in that: The preset conditions are that the target battery does not have a single cell whose single cell voltage is higher than a first preset voltage standard or lower than a second preset voltage standard, and the internal resistance of the target battery is lower than a preset resistance standard.

4. The method for online maintenance of substation batteries according to claim 3, characterized in that: The maintaining of the target battery comprises: Performing discharge balancing on the single cell batteries whose voltage is higher than the first preset voltage standard; Supplementary charging of the single cell battery whose voltage is lower than the second preset voltage standard; When the internal resistance of the target battery is higher than the preset resistance standard, a forward spike pulse excitation maintenance is performed on the target battery.

5. The method for online maintenance of substation batteries according to claim 1, characterized in that: Also includes: Real-time monitoring of the ambient temperature around the target battery; When the ambient temperature exceeds an upper limit of a preset temperature range, cooling the surrounding environment of the target battery; When the ambient temperature exceeds a lower limit of the preset temperature range, the ambient temperature of the target battery is increased.

6. The method for online maintenance of substation batteries according to any one of claims 1 to 5, characterized in that: The preset detection frequency is determined based on the service life and usage pattern of the target battery.

7. A substation battery online maintenance system, characterized in that: include: A first acquisition unit, used for acquiring a discharge instruction, wherein the discharge instruction is generated at a preset detection frequency; a first execution unit, configured to control a target storage battery in the substation to supply power to a detection load in response to the discharge instruction, wherein the detection load is a load preselected from loads with the lowest priority in the substation, and the priority is divided based on the demand for power supply reliability of each load in the substation; a second acquisition unit, used to obtain operating parameters of the target battery during the discharge process, and determine whether the operating parameters meet preset conditions; a second execution unit, configured to, when the operating parameter does not satisfy the preset condition, perform maintenance on the target battery until the operating parameter satisfies the preset condition; a third execution unit, configured to control the target battery to stop supplying power to the detection load and to charge the target battery; A fifth execution unit, configured to obtain a charging instruction; In response to the charging instruction, charging the target battery according to a preset charging strategy; The preset charging strategy is determined based on the charging and discharging parameters of the target battery and the preset optimal charging strategy. The charging and discharging parameters include voltage, current, single cell voltage, internal resistance and temperature. The preset optimal charging strategy is a charging strategy that enables a new battery of the same type as the target battery and without aging to achieve the optimal charging effect. The fifth execution unit is further used to obtain the charging and discharging parameters of the target battery during the charging process and the discharging process corresponding to the charging process as actual charging and discharging parameters; Based on the actual charge and discharge parameters, determining the actual state of the target battery during the next charging process and the fitness of the charging strategy based on which the charging process is performed; Based on the actual state of the target battery, the fitness, and the temperature, the preset optimal charging strategy is adjusted to obtain the preset charging strategy.

8. A substation, characterized in that: It comprises a substation body and the substation battery online maintenance system as claimed in claim 7.

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