Energy storage transformer operation control method and device, storage medium and electronic equipment

Abstract

The invention provides an energy storage transformer operation control method and device, a storage medium and electronic equipment, and relates to the field of power systems. Wherein the electronic device obtains the current relative temperature rise duration of the transformer, the relative temperature rise duration represents the part of the temperature rise duration of the transformer exceeding the temperature reduction duration of the transformer, and the transformer is used for connecting the energy storage power station to a power grid; and if the relative temperature rise duration is greater than a preset duration threshold, reducing the energy conversion power of the energy storage power station so as to reduce the temperature of the transformer. Therefore, by limiting the temperature rise duration of the transformer, the situation that the transformer breaks down due to the too high temperature is avoided, compared with the situation that the transformer is directly turned off once the current exceeds the threshold value, the transformer can be continuously in the running state, and therefore the running efficiency of the energy storage power station is improved.

Description

Technical Field

[0001] The present application relates to the field of power systems, and more specifically, to an energy storage transformer operation control method, device, storage medium and electronic equipment. Background Art

[0002] In order to solve the problem of imbalance between supply and demand in the power system, relevant technologies for regulating the input of the power grid by using energy storage power stations have been proposed. Energy storage power stations can store energy when power demand is low and release energy during peak hours, thereby improving the operating efficiency and reliability of the power grid. At the same time, they can also support the access and consumption of renewable energy (for example, wind power generation, solar power generation) and reduce energy waste.

[0003] Due to the difference in voltage required between the power grid and the energy storage power station, the energy storage power station needs to regulate the power grid through a transformer. The transformer acts as a bridge between the energy storage power station and the power grid, and can convert voltage to ensure efficient and matching energy transmission between the energy storage system and the power grid. Specifically, when the energy storage power station needs to discharge to the power grid, the transformer converts the DC power output by the battery into AC power suitable for the power grid and adjusts the voltage; when the energy storage power station needs to charge, the transformer converts the high-voltage AC power of the power grid into a voltage suitable for charging the energy storage system.

[0004] However, during the regulation process, the transformer may overheat due to heating of the internal winding resistance caused by long-term high-load operation. Summary of the invention

[0005] In order to overcome at least one of the deficiencies in the prior art, the present application provides an energy storage transformer operation control method, device, storage medium and electronic device, including:

[0006] In a first aspect, the present application provides an energy storage transformer operation control method, the method comprising:

[0007] Obtaining the current relative heating time of the transformer, wherein the relative heating time indicates the portion of the heating time of the transformer exceeding the cooling time of the transformer, and the transformer is used to connect the energy storage power station to the power grid;

[0008] If the relative temperature rise time is greater than a preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer.

[0009] In a second aspect, the application further provides an energy storage transformer operation control device, the device comprising:

[0010] A duration monitoring module, used to obtain the current relative heating duration of the transformer, wherein the relative heating duration indicates the portion of the heating duration of the transformer exceeding the cooling duration of the transformer, and the transformer is used to connect the energy storage power station to the power grid;

[0011] The temperature control module is used to reduce the energy conversion power of the energy storage power station to reduce the temperature of the transformer if the relative temperature rise time is greater than a preset time threshold.

[0012] In a third aspect, the present application further provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the energy storage transformer operation control method is implemented.

[0013] In a fourth aspect, the present application further provides an electronic device, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the energy storage transformer operation control method is implemented.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] The present application provides an energy storage transformer operation control method, device, storage medium and electronic device. Among them, the electronic device obtains the current relative heating time of the transformer, wherein the relative heating time indicates the portion of the transformer heating time that exceeds the transformer cooling time, and the transformer is used to connect the energy storage power station to the power grid; if the relative heating time is greater than the preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer. In this way, by limiting the heating time of the transformer to avoid the transformer from malfunctioning due to excessive temperature, compared to directly shutting down the transformer once the current exceeds the threshold, the transformer can be kept in operation, thereby improving the operating efficiency of the energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a scene of an energy storage power station provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a flow chart of an energy storage transformer operation control method provided in an embodiment of the present application;

[0019] Figure 3 A detailed schematic diagram of the energy storage transformer operation control method provided in an embodiment of the present application;

[0020] Figure 4A schematic diagram of the structure of the energy storage transformer operation control device provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "first", "second", "third", etc. that may be involved are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In addition, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0026] Based on the above statement, see Figure 1In the schematic diagram of the energy storage power station shown in the figure, the transformer is located between the power grid and the energy storage power station. The energy storage power station includes two energy storage units (also known as battery packs), which are represented as Bank A and Bank B, a power conversion system (PCS) and a control unit. Among them, the energy storage unit is the core part of energy storage, and its main function is to store and release electrical energy. The energy storage unit stores electrical energy through the charging process when the power grid is in surplus or the electricity price is low, and releases electrical energy to the power grid through the discharging process when the power grid demand increases or the electricity price is high.

[0027] The power conversion system is a key component of the energy storage power station, responsible for the conversion and regulation of electric energy. The power conversion system converts the DC power output by the energy storage unit into AC power, or converts AC power into DC power to match the power demand of the power grid and the energy storage unit. At the same time, the power conversion system adjusts the power of the output electric energy according to the instructions of the control unit to ensure precise control of energy and maintain the frequency and voltage stability of the output AC power to meet the grid access standards.

[0028] The control unit is the command center of the energy storage power station, responsible for monitoring and managing the operation of the entire energy storage system. The control unit issues control instructions by collecting and analyzing real-time data from the energy storage unit, power conversion system, and other related equipment to ensure that the energy storage power station stores and releases energy according to the preset strategy.

[0029] As introduced in the background technology, the transformer may overheat during the regulation process due to long-term high-load operation, causing the internal winding resistance to heat up. In this regard, in the relevant technology, the voltage signal obtained by the acquisition unit can be collected, and the current value can be obtained according to the voltage signal. If the current value exceeds the current threshold, the transformer operation is directly terminated to avoid overheating of the transformer. However, in the actual implementation process, it is found that since the transformer is directly shut down once the current exceeds the threshold in this technology, it means that the working time of the transformer will be reduced, which will reduce the operating efficiency of the energy storage power station.

[0030] Based on the discovery of the above technical problems, the inventors have proposed the following technical solutions to solve or improve the above problems through creative work. It should be noted that the defects in the solutions in the above prior art are the results obtained by the inventors after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in the embodiments of the present application for the above problems below should all be the contributions made by the inventors to the present application in the process of invention and creation, and should not be understood as technical contents known to those skilled in the art.

[0031] In view of the above technical problems, an embodiment of the present application (hereinafter referred to as the present embodiment) provides an energy storage transformer operation control method. Figure 2 As shown, the method includes:

[0032] S1, obtain the current relative temperature rise time of the transformer.

[0033] The relative heating time refers to the portion of the transformer heating time that exceeds the transformer cooling time. The transformer is used to connect the energy storage power station to the power grid.

[0034] S2: If the relative temperature rise time is greater than a preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer.

[0035] In this way, by limiting the heating time of the transformer, the transformer can be prevented from failing due to overtemperature. Compared with directly shutting down the transformer once the current exceeds the threshold, the transformer can be kept in operation continuously, thereby improving the operating efficiency of the energy storage power station.

[0036] In some embodiments of the present application, the electronic device implementing the energy storage transformer operation control method may be, but is not limited to, an embedded device, a desktop computer, a server, and the like. The server may be a single server or a server group. The server group may be centralized or distributed (for example, the server may be a distributed system). In some embodiments, the server may be local or remote relative to the user terminal. In some embodiments, the server may be implemented on a cloud platform; as an example only, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an inter-cloud, a multi-cloud, and the like, or any combination thereof. In some embodiments, the server may be implemented on an electronic device having one or more components.

[0037] To make the solution provided by this embodiment clearer, the following uses a server as an electronic device to implement the method. Figure 2 However, it should be understood that the operations of the flowchart may not be implemented in order, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowchart, or remove one or more operations from the flowchart, guided by the content of this application. Figure 2 As shown, the method includes:

[0038] S1, obtain the current relative temperature rise time of the transformer.

[0039] Among them, if the relative heating time is greater than the preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer. For example, assuming that the cumulative time of the transformer temperature rise is 10 minutes and the cumulative time of the temperature drop is 5 minutes, the relative heating time of the transformer is 10-5=5 minutes. In other words, the time for the transformer temperature to drop can be used to offset the time for the transformer temperature to rise, and the remaining part after the offset is called the relative heating time.

[0040] It was found in practice that not all transformers can directly collect their own temperature change information. In this regard, the present embodiment uses the current change of the transformer to indirectly reflect its temperature change. Therefore, the present embodiment provides a cooling current range and a heating current range for the transformer. When the current of the transformer is in the cooling current range, the heat dissipation capacity of the transformer is stronger than the heat generated by the current, and the temperature of the transformer will continue to decrease. On the contrary, when the transformer operates within the heating current range, the heat dissipation capacity of the transformer is weaker than the heat generated by the current, and the temperature of the transformer will continue to rise, but it will not exceed the maximum current that the transformer can carry. In particular, in some cases, a part of the power conversion system discharges to the power grid through the transformer, and at the same time, a part of the power conversion system charges the energy storage unit through the transformer, which means that the transformer is both in a charging state and a discharging state at this time, and the current of the transformer will rise sharply, which will cause the temperature of the transformer to rise rapidly.

[0041] Therefore, this embodiment can control the temperature of the transformer by monitoring the current change of the transformer. Figure 3 As shown, as an optional implementation, step S1 may include:

[0042] S1-1, determine the current operating current of the transformer.

[0043] The working current is in the temperature-lowering current range or the temperature-raising current range, so the working current will cause the temperature of the transformer to increase or decrease. In practice, it is also found that some transformers do not have current measuring devices themselves, so the working current of the transformer cannot be directly measured.

[0044] However, research has found that the working current of the transformer is actually an unbalanced current. The so-called unbalanced current refers to the current phenomenon in which there is a difference in amplitude or phase between the currents of each phase in a multi-phase AC system. This current difference may be caused by factors such as load asymmetry, unbalanced supply voltage, asymmetric transformer parameters, harmonics generated by the wiring method, and system failure. Especially when the transformer is in the situation of simultaneous charging and discharging, the current imbalance phenomenon will be particularly obvious.

[0045] As an optional implementation, the transformer is connected to multiple energy storage units of the energy storage power station. When the current of the transformer cannot be directly measured, the server can obtain the current active power and reactive power of each energy storage unit; according to the root mean square error between the current active power and reactive power of multiple energy storage units, the current working current of the transformer is obtained. In this way, the unbalanced current of the transformer is indirectly obtained.

[0046] For example, assume that the transformer is connected to two energy storage units, and the active power of one energy storage unit is represented as x1, and the reactive power is represented as x2; the active power of the other energy storage unit is represented as y1, and the reactive power is represented as y2. At this time, the working current UC of the transformer can be calculated by the following method:

[0047]

[0048] In the formula, C0=U0×K, C0 represents the reference parameter of the energy storage system, corresponding to the rated voltage U n , K represents the normalization factor, which is calculated as CV×2, and CV represents the parameter matching the system configuration or load characteristics.

[0049] In this way, the current change of the transformer during operation can be obtained, and the duration of each operating current can be counted. Therefore, in this embodiment, step S1 also includes:

[0050] S1-2, obtaining the working time of the transformer working continuously with the working current.

[0051] S1-3, updating the historical relative heating time according to the working time to obtain the current relative heating time.

[0052] The historical relative temperature rise time indicates that the historical working current of the transformer is the accumulated relative temperature rise time of the transformer.

[0053] It should also be understood that when the transformer operates within the temperature rise current range, its operating current will change with the change of the load on the grid side, and different operating currents allow different maximum operating times. It can be understood that the larger the operating current, the shorter the time required for the transformer to reach the upper temperature limit, and conversely, the smaller the operating current, the longer the time required for the transformer to reach the upper temperature limit. It is necessary to map the operating time of different currents to the same reference standard in order to facilitate the statistics of the relative temperature rise time of the transformer. In this regard, in this embodiment, the following optional implementation of step S1-3 is also provided:

[0054] S1-3-1, mapping the working time to the equivalent working time in the reference current range.

[0055] In an optional implementation, for each working duration, the server can match the working current with a plurality of preset current intervals to obtain a target current interval including the working current, wherein the plurality of current intervals are respectively preset with a mapping ratio with a reference current interval; and the working duration is mapped to an equivalent duration of the reference current interval using the mapping ratio of the target current interval.

[0056] Exemplarily, it is assumed that the above-mentioned temperature rise current range is divided into the following two current intervals:

[0057] Interval 1: TMMRange1High current upper limit 1, TMMRange1Low current lower limit 1.

[0058] Interval 2: TMMRange2High current upper limit 2, TMMRange2Low current lower limit 2.

[0059] For the above two intervals, the maximum allowable operating time of the transformer within the current range of interval 1 is set to TMMRange1Time; when it is detected that the operating current of the transformer is greater than TMMRange1High, an alarm message is issued; similarly, the maximum allowable operating time of the transformer within the current range of interval 2 is set to TMMRange2Time; when the operating current of the transformer is less than TMMRange2Low, the transformer's own heat dissipation device can provide sufficient heat dissipation capacity, which means that the temperature of the transformer will not continue to rise at this time.

[0060] Then, the reference current interval is set as the current interval in which the transformer can be restored to normal temperature, and the recovery time of the transformer is assumed to be TMMRecoverTime, and the mapping ratio of the above two intervals is obtained in the following way:

[0061]

[0062]

[0063] In addition, in the embodiment of the present application, it is also considered that when the working current of the transformer is less than TMMRange2Low, the heat dissipation device of the transformer itself can provide sufficient heat dissipation capacity, which means that the temperature of the transformer will not continue to rise, but will continue to decrease. Therefore, when the working current of the transformer is less than TMMRange2Low, the accumulated equivalent time needs to be deducted. In this regard, a corresponding mapping ratio is also provided:

[0064]

[0065] It should be noted that the above-mentioned division of the temperature rise current range is only for the convenience of explaining the examples listed, and should not be regarded as a limitation of the present application. In other words, when implementing this solution, the temperature rise current range can be divided into more or fewer current intervals as needed. In addition, the recovery time TMMRecoverTime can also be set as needed. For example, the recovery time can be the duration of continuous operation at the maximum current of the temperature rise current range.

[0066] In this way, the working time of the current working current can be mapped to the equivalent working time in the reference current interval. Based on the equivalent working time, step S1-3 also includes:

[0067] S1-3-2, if the working current is less than the preset temperature rise threshold, the equivalent time is subtracted from the historical relative temperature rise time to obtain the current relative temperature rise time.

[0068] S1-3-2, if the working current is greater than or equal to the temperature rise threshold, the equivalent time and the historical relative temperature rise time are accumulated to obtain the current relative temperature rise time.

[0069] Exemplarily, continuing with the above two current ranges as an example, when it is detected that the operating current of the transformer is within the heating current range, the mapped equivalent time is added to the existing historical relative heating time; conversely, when it is detected that the operating current of the transformer is within the cooling current range, the mapped equivalent time is deducted from the existing historical relative heating time until the accumulated relative heating time exceeds the time threshold.

[0070] S2: If the relative temperature rise time is greater than a preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer.

[0071] In an embodiment of the present application, the transformer is connected to multiple energy storage units of the energy storage power station, and the transformer is cooled by reducing the energy conversion power of the multiple energy storage units. Therefore, as an optional embodiment, the server can determine the recovery power of the transformer, where the recovery power represents the power that can cool the transformer; and determine the charging and discharging work of each of the multiple energy storage units based on the recovery power.

[0072] Exemplarily, assuming that the upper limit of the apparent power of the energy storage unit in the energy storage power station is TransAPLimit, the server can use half of TransAPLimit as the recovery power; then, the recovery power is evenly calculated and output to each energy storage unit as the current charging and discharging power.

[0073] Finally, the server controls multiple energy storage units to operate at their respective charge and discharge powers for target durations. The target duration is greater than or equal to the preset duration threshold, so that the transformer has enough time to cool down. After the target duration, the transformer is allowed to operate at an operating current greater than the minimum value of the heating current range.

[0074] In this way, for energy storage power stations, especially those that need to be frequently charged and discharged at the same time, the server accurately calculates the operating time of charging and discharging through the control strategy. When the current exceeds the set time threshold for a period of time, the control strategy controls the power output of the system according to the time configuration, allowing the transformer to run at low power for a period of time, and then adjust it back to high-power charging and discharging operation, accurately ensuring that the transformer will not maintain overcurrent operation for a long time, causing damage to the transformer, and will not affect the continuous charging and discharging of the system, thereby improving the operating efficiency of the entire energy storage station.

[0075] Based on the same inventive concept as the energy storage transformer operation control method provided in this embodiment, this embodiment also provides an energy storage transformer operation control device, which includes at least one software function module that can be stored in a memory or fixed in an electronic device in the form of software. The processor in the electronic device is used to execute the executable module stored in the memory. For example, the software function module and computer program included in the device. Please refer to Figure 4 , functionally speaking, the device may include:

[0076] The duration monitoring module 11 is used to obtain the current relative heating duration of the transformer, wherein the relative heating duration indicates the portion of the heating duration of the transformer exceeding the cooling duration of the transformer, and the transformer is used to connect the energy storage power station to the power grid;

[0077] The temperature control module 12 is used to reduce the energy conversion power of the energy storage power station to reduce the temperature of the transformer if the relative temperature rise time is greater than a preset time threshold.

[0078] In some implementations of the present application, the duration monitoring module 11 is used to implement Figure 2 In step S1, the temperature control module 12 is used to implement Figure 2 Therefore, for the detailed description of each of the above modules, please refer to the specific implementation of the corresponding step. Of course, in view of the same inventive concept as the above energy storage transformer operation control method, the energy storage transformer operation control device can also implement other steps or sub-steps of the method through the above modules. For example:

[0079] Optionally, the duration monitoring module 11 is further specifically used for:

[0080] Determine the current operating current of the transformer, wherein the operating current may cause the temperature of the transformer to increase or decrease;

[0081] Obtain the working time of the transformer working continuously with the working current;

[0082] The historical relative temperature rise time is updated according to the working time to obtain the current relative temperature rise time, wherein the historical relative temperature rise time indicates that the historical working current of the transformer has been the accumulated relative temperature rise time of the transformer.

[0083] Optionally, the duration monitoring module 11 is further specifically used for:

[0084] Mapping the working time to an equivalent working time in a reference current range;

[0085] If the working current is less than the preset temperature rise threshold, the equivalent time is subtracted from the historical relative temperature rise time to obtain the current relative temperature rise time;

[0086] If the working current is greater than or equal to the temperature rise threshold, the equivalent time and the historical relative temperature rise time are accumulated to obtain the current relative temperature rise time.

[0087] Optionally, the duration monitoring module 11 is further specifically used for:

[0088] Matching the working current with a plurality of preset current intervals to obtain a target current interval including the working current, wherein the plurality of current intervals are respectively preset with a mapping ratio with the reference current interval;

[0089] The working time is mapped to the equivalent time of the reference current interval using the mapping ratio of the target current interval.

[0090] Optionally, the working current is an unbalanced current of the transformer, the energy storage power station includes a plurality of energy storage units, and the duration monitoring module 11 is further specifically used for:

[0091] Obtain the current active power and reactive power of each energy storage unit;

[0092] The current operating current of the transformer is obtained according to the root mean square error between the current active power and reactive power of the multiple energy storage units.

[0093] Optionally, the transformer is connected to a plurality of energy storage units of an energy storage power station, and the temperature control module 12 is further specifically used for:

[0094] Determine the recovery power of the transformer, wherein the recovery power represents the power capable of cooling the transformer;

[0095] The charging and discharging powers of the multiple energy storage units are determined according to the restored power.

[0096] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0097] It should also be understood that if the above implementation is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0098] Therefore, this embodiment further provides a storage medium, which stores a computer program. When the computer program is executed by a processor, the energy storage transformer operation control method provided in this embodiment is implemented. The storage medium can be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc., which can store program codes.

[0099] This embodiment provides an electronic device for implementing an energy storage transformer operation control method. Figure 5 As shown, the electronic device may include a processor 22 and a memory 21. In addition, the memory 21 stores a computer program, and the processor implements the energy storage transformer operation control method provided in this embodiment by reading and executing the computer program corresponding to the above implementation in the memory 21.

[0100] Continue to see Figure 5 The electronic device further includes a communication unit 23. The memory 21, the processor 22 and the communication unit 23 are electrically connected to each other directly or indirectly through a system bus 24 to achieve data transmission or interaction.

[0101] The memory 21 may be an information recording device based on any electronic, magnetic, optical or other physical principle, used to record execution instructions, data, etc. In some embodiments, the memory 21 may be, but is not limited to, a volatile memory, a non-volatile memory, a storage drive, etc.

[0102] In some embodiments, the volatile memory may be a random access memory (RAM); in some embodiments, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), a flash memory, etc.; in some embodiments, the storage drive may be a disk drive, a solid-state drive, any type of storage disk (such as a CD, a DVD, etc.), or a similar storage medium, or a combination thereof, etc.

[0103] The communication unit 23 is used to send and receive data through a network. In some embodiments, the network may include a wired network, a wireless network, a fiber optic network, a telecommunication network, an intranet, the Internet, a local area network (LAN), a wide area network (WAN), a wireless local area network (WLAN), a metropolitan area network (MAN), a wide area network (WAN), a public switched telephone network (PSTN), a Bluetooth network, a ZigBee network, or a near field communication (NFC) network, or any combination thereof. In some embodiments, the network may include one or more network access points. For example, the network may include a wired or wireless network access point, such as a base station and / or a network switching node, through which one or more components of the service request processing system may be connected to the network to exchange data and / or information.

[0104] The processor 22 may be an integrated circuit chip having a signal processing capability, and the processor may include one or more processing cores (e.g., a single-core processor or a multi-core processor). By way of example only, the processor may include a central processing unit (CPU), an application specific integrated circuit (ASIC), an application specific instruction set processor (ASIP), a graphics processing unit (GPU), a physical processing unit (PPU), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a controller, a microcontroller unit, a reduced instruction set computer (RISC), or a microprocessor, or any combination thereof.

[0105] Understandably, Figure 5 The structure shown is for illustration only. The electronic device may also have Figure 5 More or fewer components than shown, or with Figure 5 Different configurations are shown. Figure 5 The components shown may be implemented in hardware, software or a combination thereof.

[0106] It should be understood that the apparatus and method disclosed in the above-mentioned embodiments can also be implemented in other ways. The apparatus embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the apparatus, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0107] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the operation of an energy storage transformer, characterized in that: The method comprises: Obtaining the current relative heating time of the transformer, wherein the relative heating time indicates the portion of the heating time of the transformer exceeding the cooling time of the transformer, and the transformer is used to connect the energy storage power station to the power grid; If the relative temperature rise time is greater than a preset time threshold, the energy conversion power of the energy storage power station is reduced to reduce the temperature of the transformer.

2. The energy storage transformer operation control method according to claim 1, characterized in that: Get the current relative temperature rise time of the transformer, including: Determining a current operating current of the transformer, wherein the operating current will cause a temperature of the transformer to increase or decrease; Obtaining a working time during which the transformer continuously works at the working current; The historical relative temperature rise time is updated according to the working time to obtain the current relative temperature rise time, wherein the historical relative temperature rise time indicates that the historical working current of the transformer has been the accumulated relative temperature rise time of the transformer.

3. The energy storage transformer operation control method according to claim 2 is characterized in that: The updating of the historical relative temperature rise time according to the working time to obtain the current relative temperature rise time includes: Mapping the working time to an equivalent working time in a reference current interval; If the working current is less than the preset temperature rise threshold, the equivalent time is subtracted from the historical relative temperature rise time to obtain the current relative temperature rise time; If the operating current is greater than or equal to the temperature rise threshold, the equivalent time and the historical relative temperature rise time are accumulated to obtain the current relative temperature rise time.

4. The energy storage transformer operation control method according to claim 3 is characterized in that: Mapping the working time to an equivalent working time in a reference current interval includes: Matching the operating current with a plurality of preset current intervals to obtain a target current interval including the operating current, wherein the plurality of current intervals are respectively preset with a mapping ratio with the reference current interval; The working duration is mapped to an equivalent duration of the reference current interval using a mapping ratio of the target current interval.

5. The energy storage transformer operation control method according to claim 2, characterized in that: The working current is an unbalanced current of the transformer, the energy storage power station includes a plurality of energy storage units, and determining the current working current of the transformer includes: Obtaining the current active power and reactive power of each of the energy storage units; The current operating current of the transformer is obtained according to the root mean square error between the current active power and reactive power of the multiple energy storage units.

6. The energy storage transformer operation control method according to claim 1, characterized in that: The transformer is connected to a plurality of energy storage units of the energy storage power station, and reduces the energy conversion power of the energy storage power station, including: Determining a recovery power of the transformer, wherein the recovery power represents a power capable of cooling the transformer; The charging and discharging powers of the respective energy storage units are determined according to the restored powers.

7. The energy storage transformer operation control method according to any one of claims 1 to 6, characterized in that: The transformer discharges to the power grid and also charges the energy storage power station.

8. An energy storage transformer operation control device, characterized in that: The device comprises: A duration monitoring module, used to obtain the current relative heating duration of the transformer, wherein the relative heating duration indicates the portion of the heating duration of the transformer exceeding the cooling duration of the transformer, and the transformer is used to connect the energy storage power station to the power grid; The temperature control module is used to reduce the energy conversion power of the energy storage power station to reduce the temperature of the transformer if the relative temperature rise time is greater than a preset time threshold.

9. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the energy storage transformer operation control method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The electronic device includes a processor and a memory, the memory stores a computer program, and when the computer program is executed by the processor, the energy storage transformer operation control method according to any one of claims 1 to 7 is implemented.

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