A method, system and electronic equipment for online capacity verification of storage battery in a substation

Abstract

The present invention discloses a method, system and electronic equipment for online capacity verification of a substation battery, and relates to the technical field of battery maintenance. The method, after obtaining a core capacity discharge instruction, responds to the core capacity discharge instruction, inverts the direct current output by the battery into a target alternating current with a voltage equal to the required voltage of a target load, the target load being one or more loads preselected in the substation, and the required current being the target discharge current when the battery core capacity is discharged; then, based on the target alternating current, the target load is powered, thereby realizing the core capacity discharge of the battery. Thus, the problem of consuming manpower and material resources caused by the need to disconnect the battery from the DC bus and then manually verify the capacity of the battery in the prior art is solved. By inverting the direct current output by the battery into alternating current and supplying power to the target load in the substation, the online capacity verification of the battery is realized on the basis of disconnecting from the bus, thereby greatly reducing the investment of manpower and material resources.

Description

Technical Field

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

[0002] The substation battery pack is the core component of the station DC system and the basis for ensuring the reliable operation of the DC system. The quality of the battery is directly related to the quality of the station DC system. Therefore, the maintenance of the battery pack is very important.

[0003] Among many battery maintenance tasks, only battery pack core capacity discharge can determine whether the battery capacity meets the operating requirements, while other maintenance tasks can only find some obvious faults in the battery operation process or improve the safety factor of battery operation. Battery pack core capacity discharge is to check the battery pack capacity with a current of 0.1C, and the discharge time is less than or equal to 10h, and then charge the battery pack after the discharge is completed.

[0004] With the rapid development of regional power grids, teams are faced with the difficulty of increasing workload due to the small number of people and large number of stations. Battery capacity verification has many problems, such as long labor time, inconvenient carrying of detection instruments, and delayed detection of problems. In addition, traditional on-site capacity verification operations are cumbersome, consuming a lot of manpower and material resources, and battery failures may still not be discovered in time. Therefore, the development of a safe and reliable remote control method for battery capacity verification charging and discharging has high application value. Summary of the invention

[0005] The purpose of the present invention is to provide a method, system and electronic equipment for online capacity verification of batteries in a substation, so as to solve the problem of consuming manpower and material resources in the prior art that the batteries need to be disconnected from the DC bus and then the capacity of the batteries needs to be verified manually. By inverting the DC power output by the batteries into AC power and supplying power to the target loads in the substation, the online capacity verification of the batteries is achieved on the basis of being disconnected from the bus, thereby greatly reducing the investment in manpower and material resources.

[0006] In a first aspect, the present invention provides a method for online capacity verification of a substation battery, comprising:

[0007] Get the nuclear capacity discharge instruction;

[0008] In response to the nuclear capacity discharge instruction, the DC power output by the storage battery is inverted into a target AC power having a voltage equal to a required voltage of a target load, wherein the target load is one or more loads preselected in the substation;

[0009] Based on the target AC power, supply power to the target load in the substation to discharge the core capacity of the battery;

[0010] The demand current of the target load is the target discharge current when the core capacity of the battery is discharged.

[0011] In a preferred solution, supplying power to the target load based on the target alternating current includes:

[0012] adjusting the target alternating current based on the demand current of the target load;

[0013] The target load is powered based on the regulated target AC power.

[0014] In a preferred solution, the method for determining the target load includes:

[0015] In response to the nuclear capacity discharge instruction, obtaining the demand current of each load in the substation that is connected to the battery according to a preset period;

[0016] The target load in the current preset cycle is determined based on the demand current of each load and the target discharge current.

[0017] In a preferred solution, the method for determining the target load includes:

[0018] Within a preset time period, obtaining the demand current of each load in the substation that is connected to the battery according to a preset frequency;

[0019] Determine a preselected load based on the demand current of each load, wherein the preselected load is a load whose demand for current remains unchanged during the core capacity discharge time of the battery;

[0020] The target load is determined among the preselected loads based on the target discharge current and a period during which the current demand of each of the preselected loads remains unchanged.

[0021] In a preferred embodiment, the core capacity discharge instruction is generated at a target time, the target time is within a period when the target load's demand for current remains unchanged, and the duration from the target time to the end of the period when the target load's demand for current remains unchanged is greater than or equal to the core capacity discharge duration of the battery.

[0022] In a preferred solution, the method for online capacity verification of substation batteries further includes:

[0023] Real-time monitoring of whether the discharge state of the battery is normal;

[0024] When it is determined that the discharge state of the storage battery is abnormal, discharging the core capacity of the storage battery is stopped.

[0025] In a preferred solution, the method for online capacity verification of substation batteries further includes:

[0026] After the core capacity of the storage battery is discharged, the storage battery is charged.

[0027] In a second aspect, the present invention provides an online capacity verification system for a substation battery, comprising:

[0028] A collection unit, used for obtaining a nuclear capacitor discharge instruction;

[0029] an inverter unit, configured to invert the DC power output by the storage battery into a target AC power having a voltage equal to a required voltage of a target load in response to the nuclear capacity discharge instruction, wherein the target load is one or more loads preselected in the substation;

[0030] an execution unit, configured to supply power to the target load based on the target alternating current, thereby discharging the core capacity of the battery;

[0031] The demand current of the target load is the target discharge current when the core capacity of the battery is discharged.

[0032] In a third aspect, the present invention provides a substation, comprising a substation body and the substation battery online capacity verification system provided in the second aspect.

[0033] In a fourth aspect, the present invention provides an electronic device, the electronic device comprising:

[0034] processor;

[0035] a memory for storing instructions executable by the processor;

[0036] The processor is used to execute the online capacity verification method for substation batteries provided in the first aspect of the present invention.

[0037] In order to achieve the above-mentioned purpose, the method, system and electronic equipment for online capacity verification of substation batteries provided by the present invention, after obtaining the core capacity discharge instruction, respond to the core capacity discharge instruction, and invert the DC power output by the battery into a target AC power with a voltage equal to the required voltage of the target load preselected in the substation, so that the target load can be powered based on the target AC power, and the required current of the target load is the target discharge current when the battery core capacity is discharged. Therefore, on the one hand, the online core capacity discharge of the battery is realized without the battery being separated from the DC bus; on the other hand, it avoids the waste of electric energy, reduces the workload of the staff, and improves the efficiency and safety of the capacity verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1The present invention provides a flowchart of a method for online capacity verification of a substation battery.

[0039] Figure 2 A system architecture diagram for applying the online capacity verification method for substation batteries provided in an embodiment of the present invention.

[0040] Figure 3 The present invention provides an operation flow chart of the online capacity verification method for substation batteries provided by the embodiment of the present invention.

[0041] Figure 4 A structural diagram of an online battery capacity verification system for a substation provided in an embodiment of the present invention.

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

[0043] Figure 6 A structural diagram of another substation battery online capacity verification system provided by an embodiment of the present invention.

[0044] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below through the accompanying drawings and specific embodiments.

[0046] It is understandable that the traditional battery capacity verification operation requires the battery to be disconnected from the DC bus and then connected to a dedicated battery discharger as a load discharge. This method is time-consuming and labor-intensive, and there are certain operational risks, especially in recent years, the speed of power construction has accelerated, the number of substations has increased, and the operation and maintenance pressure on the team members has continued to increase.

[0047] At present, the mainstream technologies for remote core capacity of series-connected batteries include high-power discharge with dummy load, DC core capacity with load, DC / AC inverter discharge and DC / DC boost discharge. However, high-power discharge technology with dummy load has obvious disadvantages such as heat generation and energy waste, and DC core capacity with load does not meet the requirements of I 10 Discharge current requirements: DC / AC inverter discharge has high cost and large device size, and is not suitable for popularization and application. DC / DC boost discharge is suitable for communication power supply, and the main battery does not meet the DC load power supply requirements when it is increased to the discharge voltage. Therefore, how to take into account the characteristics of small on-site transformation of substations, convenient installation (small size), low cost and practical effectiveness, and completely replace the existing manual charge and discharge test is a problem that urgently needs to be solved.

[0048] In order to solve the above problems, the present invention combines the battery load capacity verification and DC / AC inverter grid discharge technology to provide a battery online capacity verification method based on inverter technology, which inverts the battery voltage into AC power with a voltage equal to the required voltage of the target load and then connects it to the grid to supply power to the target load. It can realize remote discharge capacity testing of the battery and effectively reduce the manpower and time cost of manual capacity verification, with significant economic benefits and safety improvement.

[0049] The online capacity verification method for substation batteries 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.

[0050] like Figure 1 As shown, the method for online capacity verification of a substation battery provided by an embodiment of the present invention mainly comprises the following steps:

[0051] 110. Get the nuclear capacitor discharge instruction.

[0052] Specifically, taking the example of executing the online capacity verification method of the substation battery through a controller connected to the substation control and management system, the capacity verification 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 verified, so that the controller can verify the capacity of the substation battery online after obtaining the capacity verification discharge instruction.

[0053] 120. In response to the core capacity discharge instruction, the DC power output by the battery is inverted into a target AC power having a voltage equal to a required voltage of a target load.

[0054] The target load is one or more loads preselected in the substation.

[0055] Specifically, after obtaining the core capacity discharge instruction, the controller responds to the instruction, that is, firstly inverts the direct current output by the battery into a target alternating current whose voltage is equal to the required voltage of the target load.

[0056] It is understandable that the loads in the substation are usually driven by 380V AC power. Therefore, in some optional embodiments, the DC power output by the battery can be inverted into 380V AC power to power the target load connected to the substation.

[0057] 130. Based on the target AC power, power is supplied to the target load to discharge the battery to its core capacity.

[0058] The target load demand current is the target discharge current when the battery core capacity is discharged.

[0059] It can be understood that the battery core capacity discharge is to verify the battery capacity with a current of 0.1C.

[0060] Specifically, the actual capacity of a battery is an important indicator for measuring the quality of a battery pack. It indicates the amount of electricity that a battery can release. In actual applications, the battery pack is designed with a nominal capacity for backup time. When the battery deteriorates, it is difficult to achieve the designed service time, which will pose a safety threat to the stability of the power system. The battery capacity is usually represented by C, in ampere-hours (Ah). When calculating the actual discharge capacity of a battery, it is usually expressed as the product of the discharge current and time. The calculation formula is shown in formula (1).

[0061] C = ∫ t 0i(t)dt (1)

[0062] Among them, i(t) is the real-time current, unit is A; C is the battery capacity, unit is Ah.

[0063] Based on this, when the battery that needs to be discharged to its core capacity is determined, the nominal capacity of the battery is known, so the discharge current for discharging the battery to its core capacity is also determined.

[0064] Furthermore, after the discharge current of the battery core capacity is determined, a load for consuming the discharge current can be selected as the target load in the substation based on the discharge current, that is, a load whose demand current is compatible with the discharge current is selected as the target load, thereby realizing the online core capacity discharge of the battery in the substation while supplying power to the target load based on the target AC power.

[0065] In this embodiment, after obtaining the core capacity discharge instruction, in response to the core capacity discharge instruction, the DC power output by the battery is first inverted into a target AC power having a voltage equal to the required voltage of the target load in the substation, and then the target load is powered based on the target AC power. The required current of the target load is the target discharge current when the core capacity of the battery is discharged, thereby realizing the discharge of the core capacity of the battery in the substation without disconnecting the battery from the DC bus.

[0066] It should be noted that, in actual application, the method for online capacity verification of substation batteries provided in this embodiment only needs to configure a DC / AC grid-connected inverter in the substation, and then control the connection between the inverter and the battery and the target load based on the controller. It can be seen that the method for online capacity verification of substation batteries provided in this embodiment requires little on-site modification of the substation, is easy to install, has low cost and is highly practical.

[0067] Furthermore, the controller may be arranged as a remote controller remotely connected to the controller in the substation, thereby realizing remote control of the discharge of the battery core capacity.

[0068] It should be noted that, as shown in the above formula (1), the actual capacity of the battery is determined by the target discharge current and the core capacity discharge time, so as to detect potential faulty batteries in advance and ensure the safe and reliable operation of the substation.

[0069] Based on the contents of the above embodiment, powering a target load based on the target AC power includes:

[0070] adjusting the target AC power based on the demand current of the target load;

[0071] A target load is powered based on the regulated target AC power.

[0072] In this embodiment, the target AC power is adjusted based on the demand current of the target load, and the demand current of the target load is the target discharge current when the battery core capacity is discharged. Therefore, when the target load is powered based on the adjusted target AC power, the battery can be discharged at a constant current with the target discharge current when the battery core capacity is discharged, thereby improving the accuracy of the battery core capacity discharge, and further ensuring the accuracy of the battery actual capacity detection.

[0073] It is understandable that keeping the battery discharged at a constant current of the target discharge current during the core capacity discharge cycle can improve the accuracy of the actual capacity detection of the battery. However, there are many loads in the substation, and the demand current of each load is not necessarily the same, and even for a load, the demand current in different time periods is not necessarily the same. Based on this, in order to ensure that the battery is discharged at a constant current of the target discharge current, it is necessary to first determine the load that can keep the battery discharged at a constant current of the target discharge current when it is powered.

[0074] Therefore, in an optional embodiment, the present invention provides a method for determining a target load, comprising:

[0075] In response to the nuclear capacity discharge instruction, the demand current of each load connected to the battery in the substation is obtained according to a preset cycle;

[0076] Based on the demand current and the target discharge current of each load, the target load in the current preset cycle is determined.

[0077] In this embodiment, the preset period is set according to actual needs, and can be determined by pre-acquiring the changing rules of the current demand of each load connected to the battery, thereby ensuring that the set preset period can basically cover the changes in the current demand of each load.

[0078] Furthermore, after reasonably setting the preset cycle, by obtaining the demand current of each load connected to the battery in the substation according to the preset cycle when responding to the nuclear capacity discharge instruction, real-time acquisition of the demand current changes of each load connected to the battery can be achieved.

[0079] Furthermore, because the target discharge current is determined, after obtaining the demand current of each load connected to the battery, the load that can match the demand current with the target discharge current can be determined in real time based on the relationship between each demand current and the target discharge current, and then when these loads are powered by the target discharge current, the online core capacity of the battery can be realized by discharging the battery at a constant current.

[0080] In this embodiment, the target load is determined based on the target discharge current and the demand current of each load connected to the battery obtained according to a preset period, and dynamic adjustment of the target load is achieved, thereby effectively ensuring that the battery is discharged at a constant current with the target discharge current.

[0081] It should be noted that, because the target load determined by the target load determination method provided by the above embodiment changes in real time, the power supply relationship between the battery and the load also changes in real time. However, at the moment when the power supply relationship between the battery and the load is switched, the power supply current may change, thereby affecting the constant current discharge of the battery.

[0082] Based on this, in some possible embodiments, it is possible to first determine through experiments the change in the power supply current when the target load changes and the battery switches to supply power to the new target load, and then determine the power supply current loss based on the change. For example, if the power supply current decreases at the moment of switching, a load that matches the demand current and the current reduction is selected as a compensation load in the substation, and at the moment of power supply switching, the battery also supplies power to the compensation load, and then when the current fluctuation caused by the switching ends, the power supply relationship between the battery and the compensation load is cut off. If the power supply current increases at the moment of switching, a load that matches the demand current and the current increase is selected as a current suppression load in the newly determined target load, and at the moment of power supply switching, the battery does not supply power to the current suppression load, and then when the current fluctuation caused by the switching ends, the power supply relationship between the battery and the current suppression load is established.

[0083] In an optional embodiment, the present invention further provides another method for determining a target load, comprising:

[0084] Obtaining the demand current of each load in the substation that is connected to the battery according to a preset frequency within a preset time period;

[0085] Based on the demand current of each load, a preselected load is determined, wherein the load is a load whose demand for current remains unchanged during the core capacity discharge time of the battery;

[0086] A target load is determined among the preselected loads based on the target discharge current and a period of time during which the current demand of each preselected load remains constant.

[0087] In this embodiment, by obtaining the demand current of each load connected to the battery in the substation according to a preset frequency within a preset time period, it is possible to fully understand the changes in the current demand of each load connected to the battery within the preset time period, and thus determine the load whose current demand remains unchanged within the core capacity discharge time of the battery based on the demand current of each load. Finally, based on the target discharge current, it is possible to further determine from the determined pre-selected loads the load whose current demand remains unchanged within the same time period and whose total demand current matches the target discharge current, that is, determine the target load.

[0088] In this embodiment, the current demand patterns of various loads connected to the battery are understood in advance, and then based on the demand patterns, loads that are in the same time period and that meet the core capacity discharge time of the battery are found. This allows the battery to ensure constant current discharge when supplying power to the selected loads in this time period, thereby meeting the core capacity discharge requirements of the battery.

[0089] Further, in an optional embodiment, the core capacity discharge instruction is generated at a target time, the target time is within a period in which the target load's demand for current remains unchanged, and the duration from the target time to the end of the period in which the target load's demand for current remains unchanged is greater than or equal to the core capacity discharge duration of the battery.

[0090] In this embodiment, after the target load is determined, because the target loads have the same period of stable current demand, the core capacity discharge instruction is generated at the target time, and the target time is within the period of time when the target load's demand for current remains unchanged, and the duration from the target time to the end of the period of time when the target load's demand for current remains unchanged is greater than or equal to the core capacity discharge duration of the battery, so that the timed automatic generation of the core capacity discharge instruction can be achieved, and then the automatic online capacity control of the substation battery is achieved, thereby further reducing the workload of the staff and improving the capacity control efficiency.

[0091] Furthermore, in order to ensure the safety of online capacity verification, in an optional embodiment, the method for online capacity verification of a substation battery provided by an embodiment of the present invention further includes:

[0092] Real-time monitoring of whether the battery discharge status is normal;

[0093] When it is determined that the discharge state of the storage battery is abnormal, the discharge of the core capacity of the storage battery is stopped.

[0094] In this embodiment, the discharge state of the battery is monitored in real time during the discharge of the battery core capacity, and when it is determined that the discharge state of the battery is abnormal, the discharge of the battery core capacity is stopped, thereby effectively ensuring the safety of the discharge of the battery core capacity.

[0095] In an optional embodiment, the method for online capacity verification of a substation battery provided by the embodiment of the present invention further includes:

[0096] After the core capacity of the battery is discharged, the battery is charged.

[0097] It is understandable that after the core capacity of the battery is discharged, the battery is in a low-power state. By charging the battery, the battery power can be guaranteed, and then when necessary, the substation can be reliably powered by the battery, which improves the operating reliability of the substation.

[0098] It should be noted that in order to improve the operational safety of the substation, during the charging process of the battery, the charging status of the battery can also be monitored in real time, and then when it is determined that the charging status is abnormal or the charging reaches the cut-off condition, the charging of the battery is stopped.

[0099] Figure 2 This is a system architecture diagram of the online capacity verification method for substation batteries provided by the above embodiment of the present invention, wherein the battery pack is the battery recorded in the embodiment of the present invention, and the monitoring device is the controller recorded in the embodiment of the present invention. The battery monitoring device can obtain various operating parameters of the battery pack in the process of capacity verification and discharge in real time by connecting to the monitoring device, such as internal resistance, single cell voltage, surface temperature, etc., so as to realize the diagnosis of the health status of the battery pack. Figure 2 As shown, after obtaining the core capacity discharge instruction, the monitoring device controls the inverter module to invert the DC power output by the battery pack into a target AC power whose voltage is equal to the required voltage of the target load, and then supplies power to the target loads A, B, C and N in the substation based on the target AC power, thereby realizing the core capacity discharge of the battery pack.

[0100] Furthermore, when the nuclear capacity discharge is completed or the discharge state is abnormal, the monitoring device controls the discharge to end, and then after a preset delay time, controls the inverter module to convert AC power into DC power to charge the battery pack with constant current and voltage limitation, and monitors the charging process in real time.

[0101] Figure 3The figure shows an operation flow chart of the battery capacity verification charging and discharging using the online capacity verification method for substation batteries provided by the embodiment of the present invention. Among them, the initialization process is to load the program, initialize the interrupt program, and set the default parameters; the equipment self-check is to detect each module of the battery charging and discharging device, including the bus switch relay state, the charging and discharging switch state, the two-way DC / AC module communication detection, etc.; if the initialization and self-check fail, subsequent operations cannot be performed. During the discharge process, the main program cyclically detects the discharge state and the discharge cut-off judgment condition. When an abnormality occurs and the discharge cut-off condition is triggered, the discharge process ends; after the delay program ends, the battery charging is started, and the main program continues to judge the charging end condition until the charging ends.

[0102] The operation process can adopt a dual-loop control method of local control and remote control, among which, the local control can use a touch panel to control the charging and discharging process, and the upper computer software communication control program can realize the communication between the lower computer and the upper computer through remote signaling, remote control, remote setting and other functions, remotely monitor the charging and discharging process, and issue real-time alarms, so that the device can complete the expected designed functions under the instructions of the software.

[0103] Further, Figure 3 The charge and discharge status detection steps set in can ensure the orderly charging and discharging of the battery core capacity and prevent accidents caused by abnormal status.

[0104] Specifically, you can set a variety of fault status responses, such as:

[0105] (1) AC interruption. If an AC voltage interruption or low voltage is detected, the charging and discharging process is stopped immediately, and the backup power supply function is automatically activated through the seamless connection device to prevent the reliability of the DC system from being affected by continued discharge or charging.

[0106] (2) Communication interruption. During remote control, communication interruption will make the host computer unable to monitor the charging and discharging process, resulting in major safety hazards. After the host computer software fails to receive the return signal from the lower computer, the device sends a preset number of reconnection requests in succession. If communication is still not restored, it is determined that the communication is interrupted. If the device does not receive any instructions from the host computer software within a fixed time period, the charging and discharging process will be automatically terminated.

[0107] (3) Abnormal relay status. The microcontroller detects the relay position status. If it detects that the relay does not match the status description, charging and discharging will be automatically terminated.

[0108] (4) Abnormal battery status: When the battery is under-voltage, overcharged, over-discharged, or the pole temperature is too high, an alarm is issued and charging and discharging are stopped.

[0109] (5) Bidirectional DC / AC conversion module abnormality. During inverter discharge, the discharge voltage is detected to be higher than the standard value of the boost module voltage, or the discharge current detection value is negative; the communication interface data transmission and reception is abnormal, and the bidirectional DC / AC conversion module is determined to be abnormal, and charging and discharging are interrupted.

[0110] (6) Abnormal device temperature. The temperature sensor detects that the internal temperature of the device exceeds the set range, determines that the device temperature is abnormal, and interrupts charging and discharging to prevent damage to the device.

[0111] In summary, the online capacity verification method for substation batteries provided by the embodiment of the present invention allows operation and maintenance personnel to remotely and independently carry out online capacity verification testing of batteries without affecting the safety and reliability of the DC system operation in the station. At the same time, it can completely replace the traditional manual method, effectively reduce the risk of manual misoperation, and detect potential battery failures in advance, effectively improve the health management level of the substation power supply system and batteries, and has great significance for equipment safety and the digital transformation of operation and maintenance work to improve quality and efficiency.

[0112] In addition, the online capacity verification method for substation batteries provided by the embodiment of the invention has the direct benefit of saving the labor cost of discharging operations each year and saving the power loss of discharging each year. The indirect benefit is energy saving and emission reduction, reducing the carbon emissions generated by discharging. At the same time, it reduces the risk of misoperation during manual operation, effectively improves work efficiency, and improves the safety level of personnel, equipment and power grid.

[0113] The following is an introduction to the substation battery online capacity verification system provided by an embodiment of the present invention. The substation battery online capacity verification system described below can be considered as a module architecture for implementing the substation battery online capacity verification method provided by an embodiment of the present invention; the content described below can be cross-referenced with the above.

[0114] Optional, see Figure 4 , Figure 4 : is a structural block diagram of a substation battery online capacity verification system provided by an embodiment of the present invention, and the system may include:

[0115] The acquisition unit 10 is used to obtain the nuclear capacity discharge instruction;

[0116] The inverter unit 20 is used to respond to the core capacity discharge instruction and invert the DC power output by the battery into a target AC power whose voltage is equal to the required voltage of the target load;

[0117] The execution unit 30 is used to supply power to the target load based on the target AC power to discharge the core capacity of the battery;

[0118] The target load demand current is the target discharge current when the battery core capacity is discharged.

[0119] Optionally, the execution unit 30 is specifically configured to:

[0120] adjusting the target AC power based on the demand current of the target load;

[0121] A target load is powered based on the regulated target AC power.

[0122] Optional, see Figure 5 , Figure 5 FIG. 1 is a structural block diagram of another substation battery online capacity verification system provided by an embodiment of the present invention. Figure 4 Based on the embodiment shown, the system further includes:

[0123] The first load determination unit 40 is used to obtain the demand current of each load connected to the battery in the substation according to a preset period in response to the nuclear capacity discharge instruction;

[0124] Based on the demand current and the target discharge current of each load, the target load in the current preset cycle is determined.

[0125] Optional, see Figure 6 , Figure 6 FIG. 1 is a structural block diagram of another substation battery online capacity verification system provided by an embodiment of the present invention. Figure 4 Based on the embodiment shown, the system further includes:

[0126] The second load determination unit 50 is used to obtain the demand current of each load connected to the battery in the substation according to a preset frequency within a preset time period;

[0127] Based on the demand current of each load, a pre-selected load is determined, where the pre-selected load is a load whose demand for current remains unchanged during the core capacity discharge time of the battery;

[0128] A target load is determined among the preselected loads based on the target discharge current and a period of time during which the current demand of each preselected load remains constant.

[0129] Optionally, the core capacity discharge instruction is generated at a target time, the target time is within a period when the target load's demand for current remains unchanged, and the duration from the target time to the end of the period when the target load's demand for current remains unchanged is greater than or equal to the core capacity discharge duration of the battery.

[0130] Optionally, the execution unit 30 is further configured to:

[0131] Real-time monitoring of whether the battery discharge status is normal;

[0132] When it is determined that the discharge state of the storage battery is abnormal, the discharge of the core capacity of the storage battery is stopped.

[0133] Optionally, the execution unit 30 is further configured to:

[0134] After the core capacity of the battery is discharged, the battery is charged.

[0135] Optionally, an embodiment of the present invention further provides a substation, including a substation body and a substation battery online capacity verification system as provided in any of the above embodiments.

[0136] Below, reference Figure 7 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;

[0137] 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 7 The communication connections shown for the processor 100, the communication interface 200, the memory 300, and the communication bus 400 are merely optional;

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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 capacity verification of substation batteries, characterized in that: include: Get the nuclear capacity discharge instruction; In response to the nuclear capacity discharge instruction, the DC power output by the storage battery is inverted into a target AC power having a voltage equal to a required voltage of a target load, wherein the target load is one or more loads preselected in the substation; Based on the target alternating current, supply power to the target load to discharge the core capacity of the battery; Wherein, the required current of the target load is the target discharge current when the battery core capacity is discharged; The method for determining the target load includes: In response to the nuclear capacity discharge instruction, obtaining the demand current of each load in the substation that is connected to the battery according to a preset period; Determining the target load in the current preset cycle based on the demand current of each load and the target discharge current; The method for determining the target load further includes: Determine through experiments that when the target load changes, the change in the power supply current at the moment when the battery switches to supply power to the new target load; If the power supply current decreases at the moment of switching, a load whose demand current matches the decrease of the power supply current is selected in the substation as a compensation load; at the moment of power supply switching, the storage battery supplies power to the compensation load while supplying power to the new target load; and when the current fluctuation caused by the switching ends, the power supply relationship between the storage battery and the compensation load is cut off; If the supply current increases at the moment of switching, a load that matches the demand current and the increase in the supply current is selected as a current suppression load in the newly determined target load; at the moment of power supply switching, the battery is not used to supply power to the current suppression load; and when the current fluctuation caused by the switching ends, the power supply relationship between the battery and the current suppression load is established.

2. The method for online capacity verification of substation batteries according to claim 1, characterized in that: The step of supplying power to the target load based on the target alternating current includes: adjusting the target alternating current based on the demand current of the target load; The target load is powered based on the regulated target AC power.

3. The method for online capacity verification of substation batteries according to claim 1, characterized in that: The method for determining the target load includes: Within a preset time period, obtaining the demand current of each load in the substation that is connected to the battery according to a preset frequency; Determine a preselected load based on the demand current of each load, wherein the preselected load is a load whose demand for current remains unchanged during the core capacity discharge time of the battery; The target load is determined among the preselected loads based on the target discharge current and a period during which the current demand of each of the preselected loads remains unchanged.

4. The method for online capacity verification of substation batteries according to claim 3, characterized in that: The core capacity discharge instruction is generated at a target time, the target time is within a period in which the target load's demand for current remains unchanged, and the duration from the target time to the end time of the period in which the target load's demand for current remains unchanged is greater than or equal to the core capacity discharge duration of the battery.

5. The method for online capacity verification of a substation battery according to any one of claims 1 to 4, characterized in that: Also includes: Real-time monitoring of whether the discharge state of the battery is normal; When it is determined that the discharge state of the storage battery is abnormal, discharging the core capacity of the storage battery is stopped.

6. The method for online capacity verification of substation batteries according to claim 5, characterized in that: Also includes: After the core capacity of the storage battery is discharged, the storage battery is charged.

7. A substation battery online capacity verification system, characterized in that: include: A collection unit, used for obtaining a nuclear capacitor discharge instruction; an inverter unit, configured to invert the DC power output by the storage battery into a target AC power having a voltage equal to a required voltage of a target load in response to the nuclear capacity discharge instruction, wherein the target load is one or more loads preselected in the substation; an execution unit, configured to supply power to the target load based on the target alternating current, thereby discharging the core capacity of the battery; Wherein, the required current of the target load is the target discharge current when the battery core capacity is discharged; A first load determination unit, configured to obtain, in response to a nuclear capacity discharge instruction, a demand current of each load in the substation that is connected to the battery according to a preset cycle; Determine the target load in the current preset cycle based on the demand current and target discharge current of each load; The first load determination unit is further used to determine, through experiments, when the target load changes, the change in the power supply current at the moment when the storage battery switches to supply power to the new target load; If the power supply current decreases at the moment of switching, a load whose demand current matches the decrease of the power supply current is selected in the substation as a compensation load; at the moment of power supply switching, the storage battery supplies power to the compensation load while supplying power to the new target load; and when the current fluctuation caused by the switching ends, the power supply relationship between the storage battery and the compensation load is cut off; If the supply current increases at the moment of switching, a load that matches the demand current and the increase in the supply current is selected as a current suppression load in the newly determined target load; at the moment of power supply switching, the battery is not used to supply power to the current suppression load; and when the current fluctuation caused by the switching ends, the power supply relationship between the battery and the current suppression load is established.

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

9. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; The processor is used to execute the online capacity verification method for substation batteries as described in any one of claims 1 to 6.

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