Hybrid energy storage power control method and system, electronic equipment and storage medium

Abstract

The invention relates to a hybrid energy storage power control method and system, electronic equipment and a storage medium. The method comprises the following steps: acquiring low-frequency output and high-frequency output after output filtering decomposition of a new energy station; the low-frequency output and the high-frequency output are respectively divided into low-frequency direct output and low-frequency indirect output as well as high-frequency direct output and high-frequency indirect output according to respective proportions, and the low-frequency indirect output and the high-frequency indirect output are respectively input into a hybrid energy storage system consisting of at least two energy storage systems; the hybrid energy storage system generates power and outputs the power; taking the sum of the low-frequency direct output, the high-frequency direct output and the output generated by the hybrid energy storage system as total output; and establishing a target function of joint scheduling based on the total output target, and realizing power control of the hybrid energy storage system through an energy management strategy used for regulating and controlling the hybrid energy storage system. According to the invention, the hybrid energy storage system is utilized to restrain the output fluctuation problem of the new energy station unit.

Description

Technical Field

[0001] This disclosure relates to the field of new energy storage technology, and in particular to a power control method, system, electronic device and storage medium for hybrid energy storage. Background Technology

[0002] With the continuous expansion of wind power installed capacity, the inherent randomness, intermittency, and difficulty in accurately predicting the active power output of wind power inevitably reduce the inertial regulation capability of the power system. Therefore, configuring energy storage systems at new energy power plants to maintain power system frequency stability has become a feasible technical approach.

[0003] Flywheel energy storage is a power-type and physical-type energy storage device, which has advantages such as environmental friendliness, fast response, and unlimited charge and discharge cycles. Electrochemical energy storage, on the other hand, is an energy-type energy storage device, which has advantages such as large charge and discharge capacity and wide power adjustment range. However, electrochemical energy storage has problems such as slow frequency regulation rate and few charge and discharge cycles. Summary of the Invention

[0004] This disclosure provides a power control method, system, electronic device, and storage medium for hybrid energy storage to solve the problem of power output fluctuations in new energy power plants, and to ensure frequency stability of new energy power plants while completing scheduling tasks.

[0005] In a first aspect, this disclosure provides a power control method for hybrid energy storage, comprising:

[0006] Obtain the low-frequency and high-frequency power outputs after filtering and decomposition of the power output from the renewable energy power station;

[0007] The low-frequency power output and the high-frequency power output are respectively divided into low-frequency direct power output and low-frequency indirect power output, as well as high-frequency direct power output and high-frequency indirect power output according to their respective proportions. The low-frequency indirect power output and high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the hybrid energy storage system generates power output.

[0008] The total output is the sum of the low-frequency direct power output, the high-frequency direct power output, and the power generated by the hybrid energy storage system.

[0009] A joint scheduling objective function is established based on the total output target, and an energy management strategy for regulating the hybrid energy storage system is determined by minimizing the target value of the objective function. Control commands are output based on the energy management strategy to achieve power control of the hybrid energy storage system.

[0010] In some embodiments, the low-frequency indirect power output and the high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the power output generated by the hybrid energy storage system includes:

[0011] The low-frequency indirect power output is input into the first energy storage system, and the first energy storage system outputs the first power generation output.

[0012] The high-frequency indirect power output is input into the second energy storage system, and the second energy storage system outputs the second power generation output.

[0013] The sum of the first power generation output and the second power generation output is taken as the power generation output of the hybrid energy storage system.

[0014] In some embodiments, the first energy storage system is an electrochemical energy storage system, and the second energy storage system is a flywheel energy storage system.

[0015] In some embodiments, the total output, calculated as the sum of low-frequency direct power output, high-frequency direct power output, and power generated by the hybrid energy storage system, is as follows:

[0016]

[0017] in, This represents the total power output supplied to the power grid during time period t2. This indicates that the low-frequency output is direct. This represents the first power generation output, and t1 represents the first time series. This indicates direct high-frequency power output. t2 represents the second power generation output, and t2 represents the second time series; the sum of the first power generation output and the second power generation output is the power generation output of the hybrid energy storage system.

[0018] In some embodiments, dividing the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, and high-frequency direct output and high-frequency indirect output according to their respective proportions, includes:

[0019] The low-frequency output is divided into direct low-frequency output and indirect low-frequency output according to a first ratio, and the formula is expressed as follows:

[0020]

[0021] in, This indicates that the low-frequency output is direct. Indicates low-frequency indirect power output. Indicates low-frequency output. Indicates the first proportion;

[0022] It also includes: dividing the high-frequency output into high-frequency direct output and high-frequency indirect output according to a second ratio, the formula of which is as follows:

[0023]

[0024] in, This indicates direct high-frequency power output. Indicates high-frequency indirect power output. Indicates high-frequency output. This indicates the second proportion.

[0025] In some embodiments, the objective function for establishing joint scheduling based on the total output target is expressed as follows:

[0026]

[0027] in, This refers to the total power output supplied to the power grid during time period t2. This represents the power generation plan for time period t2, where t2 indicates the second time series.

[0028] In some embodiments, the energy management strategy includes setting the first ratio and / or the second ratio.

[0029] Secondly, this disclosure provides a power control system for hybrid energy storage, including an output acquisition unit, a direct output unit, a hybrid energy storage system, and an energy management unit;

[0030] The output acquisition unit is used to acquire the low-frequency output and high-frequency output after the output filtering and decomposition of the new energy power station;

[0031] The direct output unit is used to divide the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, as well as high-frequency direct output and high-frequency indirect output, according to their respective proportions.

[0032] The hybrid energy storage system consists of at least two energy storage systems, used to output the system's power generation output based on the input low-frequency indirect power output and high-frequency indirect power output;

[0033] The energy management unit is used to establish a joint scheduling objective function based on the total output target, and to determine the energy management strategy for regulating the hybrid energy storage system by minimizing the target value of the objective function. Based on the energy management strategy, it outputs control commands to realize power control of the hybrid energy storage system.

[0034] Thirdly, this disclosure provides an electronic device including a master controller with program code implementing the power control method of the hybrid energy storage, and a filter cooperating with the master controller.

[0035] Fourthly, this disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the power control method for hybrid energy storage described above.

[0036] This disclosure provides a power control method, system, electronic device, and storage medium for hybrid energy storage. In this method, a low-pass filter is set for the output spectrum characteristics of the new energy power station, decomposing the output of the new energy power station into high-frequency output and low-frequency output. Fast-response and large-capacity energy storage devices are used respectively to smooth the high-frequency and low-frequency fluctuations of the new energy power station, so that the output of the combined system can meet the power generation plan, thereby completing the dispatching task and ensuring the frequency stability of the new energy power station.

[0037] Compared with existing technologies, the technical solution disclosed herein has the following beneficial technical effects:

[0038] (1) Combining flywheel energy storage and electrochemical energy storage can reduce the construction cost of energy storage system and give full play to the advantages of flywheel and electrochemical energy storage.

[0039] (2) The power output of the wind farm is decomposed into low-frequency and high-frequency power outputs through a low-pass filter. Then, the high-frequency power output is adjusted by a flywheel energy storage device, and the low-frequency power output is adjusted by an electrochemical energy storage device, so that the total power output of the new energy power station and the hybrid energy storage system can meet the requirements of the power generation plan. Attached Figure Description

[0040] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0041] Figure 1 A schematic diagram of a flywheel hybrid energy storage system provided in an embodiment of this disclosure.

[0042] Figure 2 A flowchart of a power control method for hybrid energy storage provided in an embodiment of this disclosure.

[0043] Figure 3 A joint scheduling structure diagram provided for embodiments of this disclosure.

[0044] Figure 4 A schematic diagram of the joint scheduling principle provided for embodiments of this disclosure.

[0045] Figure 5 A schematic diagram of the power control system for hybrid energy storage provided in an embodiment of this disclosure.

[0046] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solutions of this disclosure, and to fully understand and implement the process of how this disclosure applies technical means to solve technical problems and achieve corresponding technical effects, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. The embodiments of this disclosure and the various features within them can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort should fall within the protection scope of this disclosure.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0050] The technical concept disclosed herein is as follows: Figure 1 The schematic diagram of the flywheel hybrid energy storage system shown combines flywheel energy storage and electrochemical energy storage, which can reduce the construction cost of the energy storage system and give full play to the advantages of each. The output of the wind farm is decomposed into low-frequency and high-frequency outputs through a low-pass filter. Then, the flywheel energy storage device is used to regulate the high-frequency output, and the electrochemical energy storage device is used to regulate the low-frequency output, so that the total output of the new energy power station and the hybrid energy storage system can meet the requirements of the power generation plan.

[0051] Example 1

[0052] Figure 2 A flowchart of a power control method for hybrid energy storage provided in this disclosure embodiment is shown below. Figure 2As shown, a power control method for hybrid energy storage includes:

[0053] S201, obtain the low-frequency and high-frequency power outputs after power output filtering and decomposition by the new energy power station;

[0054] S202, the low-frequency power output and the high-frequency power output are respectively divided into low-frequency direct power output and low-frequency indirect power output and high-frequency direct power output and high-frequency indirect power output according to their respective proportions, wherein the low-frequency indirect power output and high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the hybrid energy storage system generates power output.

[0055] S203, the sum of low-frequency direct power output, high-frequency direct power output, and power output generated by the hybrid energy storage system is taken as the total power output;

[0056] S204. Establish a joint scheduling objective function based on the total output target, and determine the energy management strategy for regulating the hybrid energy storage system by minimizing the objective value of the objective function. Output control commands based on the energy management strategy to achieve power control of the hybrid energy storage system.

[0057] Specifically, the technical solution disclosed herein sets up a low-pass filter according to the power output spectrum characteristics of the new energy power station, decomposes the power output of the new energy power station into high-frequency power output and low-frequency power output, and adopts fast-response type and large-capacity type energy storage devices respectively to smooth the high-frequency fluctuations and low-frequency fluctuations of the new energy power station, so that the combined system output can meet the power generation plan.

[0058] Compared with the prior art, this disclosure provides a flywheel hybrid energy storage system and uses the hybrid energy storage system to smooth the output fluctuation of new energy power station units. While completing the scheduling task, it ensures the frequency stability of the new energy power station, and finally enables the total output of the new energy power station and the hybrid energy storage system to meet the requirements of the power generation plan.

[0059] Example 2

[0060] Based on the above embodiments, the low-frequency indirect power output and the high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the power output generated by the hybrid energy storage system includes:

[0061] The low-frequency indirect power output is input into the first energy storage system, and the first energy storage system outputs the first power generation output.

[0062] The high-frequency indirect power output is input into the second energy storage system, and the second energy storage system outputs the second power generation output.

[0063] The sum of the first power generation output and the second power generation output is taken as the power generation output of the hybrid energy storage system.

[0064] Based on the above embodiments, the first energy storage system is an electrochemical energy storage system, and the second energy storage system is a flywheel energy storage system.

[0065] It should be noted that the power output of a renewable energy power station can be considered as a synthesis of slowly changing fluctuations and randomly rapidly changing fluctuations. Frequency domain analysis of the power output of a renewable energy power station reveals that the low-frequency portion has high energy, while the high-frequency portion has low energy. Furthermore, the bandwidth occupied by each frequency component can be roughly identified, providing a basis for filter parameter selection. To achieve the purpose of scheduling and maintaining the frequency, the control strategy jointly schedules the flywheel energy storage device and the electrochemical energy storage device. The two energy storage devices cooperate and coordinate with each other. The joint scheduling structure diagram and principle diagram are shown below. Figure 3 and Figure 4 As shown.

[0066] Example 3

[0067] Based on the above embodiments, the total output, which is the sum of low-frequency direct power output, high-frequency direct power output, and power generated by the hybrid energy storage system, is calculated using the following formula:

[0068]

[0069] in, This represents the total power output supplied to the power grid during time period t2. This indicates that the low-frequency output is direct. This represents the first power generation output, and t1 represents the first time series. This indicates direct high-frequency power output. t2 represents the second power generation output, and t2 represents the second time series; the sum of the first power generation output and the second power generation output is the power generation output of the hybrid energy storage system.

[0070] Specifically, such as Figure 3 and Figure 4 As shown, wind power output is decomposed into high-frequency and low-frequency outputs after passing through a filter. Part of the low-frequency output is stored in an electrochemical energy storage station, and the rest is directly output. The sum of the electricity generated by the electrochemical energy storage station and the electricity directly output from the wind power station at low frequency is the total low-frequency output; the same applies to the high-frequency output. The sum of the total high-frequency output and the total low-frequency output is the total system output.

[0071] Depend on Figure 4 It can be seen that the power output provided to the grid by the hybrid energy storage system includes a low-frequency direct output portion, an electrochemical energy storage and power generation portion, a high-frequency energy direct output portion, and a flywheel energy storage and power generation portion. In the above formula, t1 represents the power generation part of the electrochemical energy storage system, and t1 represents the time series, with 1 hour as a time period, because the conversion speed of the electrochemical energy storage system is relatively slow.

[0072] Example 4

[0073] Based on the above embodiments, the step of dividing the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, and high-frequency direct output and high-frequency indirect output according to their respective proportions, includes:

[0074] The low-frequency output is divided into direct low-frequency output and indirect low-frequency output according to a first ratio, and the formula is expressed as follows:

[0075]

[0076] in, This indicates that the low-frequency output is direct. Indicates low-frequency indirect power output. Indicates low-frequency output. Indicates the first proportion;

[0077] It also includes: dividing the high-frequency output into high-frequency direct output and high-frequency indirect output according to a second ratio, the formula of which is as follows:

[0078]

[0079] in, This indicates direct high-frequency power output. Indicates high-frequency indirect power output. Indicates high-frequency output. This indicates the second proportion.

[0080] It should be noted that, This indicates the percentage of direct low-frequency output relative to the total low-frequency power, for example... This means that 70% of the low-frequency power is directly output, and the remaining 30% is stored in an electrochemical energy storage power station. This represents the percentage of high-frequency direct output power relative to the total high-frequency power.

[0081] Example 5

[0082] Based on the above embodiments, the formula for establishing the objective function of joint scheduling based on the total output target is expressed as follows:

[0083]

[0084] in, This refers to the total power output supplied to the power grid during time period t2. This represents the power generation plan for time period t2, where t2 indicates the second time series.

[0085] In the formula, t2 represents the time series, with 5 minutes as a time interval. This is the power generation plan at time t2. Because the tracking error can be positive or negative, to prevent positive and negative errors from canceling each other out when accumulating the errors of each time period, the absolute value is used for each time period.

[0086] Example 6

[0087] Based on the above embodiments, the energy management strategy includes setting the first ratio and / or the second ratio.

[0088] It should be noted that, by Figure 4 It is evident that the electrochemical energy storage system and the flywheel energy storage system are scheduled by the same energy management unit, and the energy management strategy adopted belongs to the joint scheduling mode.

[0089] Example 7

[0090] Figure 5 This is a schematic diagram of the structure of a power control system for hybrid energy storage provided in an embodiment of this disclosure, as shown below. Figure 5 As shown, the system includes an output acquisition unit 501, a direct output unit 502, a hybrid energy storage system 503, and an energy management unit 504;

[0091] The power acquisition unit 501 is used to acquire the low-frequency power and high-frequency power after power filtering and decomposition by the new energy power station.

[0092] The direct output unit 502 is used to divide the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, as well as high-frequency direct output and high-frequency indirect output, according to their respective proportions.

[0093] The hybrid energy storage system 503 consists of at least two energy storage systems and is used to output the power generation of the system based on the input of the low-frequency indirect power output and the high-frequency indirect power output.

[0094] The energy management unit 504 is used to establish a joint scheduling objective function based on the total output target, and determine the energy management strategy for regulating the hybrid energy storage system by minimizing the target value of the objective function. Based on the energy management strategy, it outputs control commands to realize power control of the hybrid energy storage system.

[0095] Compared with the prior art, this disclosure provides a flywheel hybrid energy storage system and uses the hybrid energy storage system to smooth the output fluctuation of new energy power station units. While completing the scheduling task, it ensures the frequency stability of the new energy power station, and finally enables the total output of the new energy power station and the hybrid energy storage system to meet the requirements of the power generation plan.

[0096] Based on the above embodiments, this disclosure provides an electronic device, including a main controller with program code that implements the methods described in the above embodiments, and a filter that cooperates with the main controller.

[0097] Specifically, by Figure 4 As can be seen, the working principle of the system is as follows: the active power output of the wind farm is decomposed into high-frequency and low-frequency components after being filtered, and then the decision quantity is solved by the optimization mathematical model and sent to the controller to realize the optimization result.

[0098] In some embodiments of this example, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the steps of the method described in the above embodiments.

[0099] The processor may include, but is not limited to, one or more processors or microprocessors. Each processor may be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic component, for executing the methods in the above embodiments.

[0100] Computer-readable storage media can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Computer-readable storage media may include, but are not limited to, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, and computer storage media (e.g., hard disks, floppy disks, solid-state drives, removable disks, CD-ROMs, DVD-ROMs, Blu-ray discs, etc.).

[0101] Computer-readable storage media may also store at least one computer-executable program / instruction, such as computer-readable instructions. Computer-readable storage media include, but are not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Computer-readable storage media may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, a non-transitory computer-readable storage medium may be connected to a computing device such as a computer, and then, when the computing device executes the computer-readable instructions stored on the computer-readable storage medium, the various methods described above can be performed.

[0102] In addition, the computer device may include (but is not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (e.g., keyboard, mouse, speakers, etc.).

[0103] The processor can communicate with external devices via the I / O bus through wired or wireless networks.

[0104] In one embodiment, the at least one computer-executable instruction may also be compiled into or comprise a software product / computer program product, wherein one or more computer-executable instructions are executed by a processor to perform the steps of the various functions and / or methods in the embodiments described herein.

[0105] In the embodiments provided in this disclosure, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0106] It should be noted that, in this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0107] While the embodiments disclosed herein are as described above, the foregoing content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope of this disclosure; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A power control method for hybrid energy storage, characterized in that, include: Obtain the low-frequency and high-frequency power outputs after filtering and decomposition of the power output from the renewable energy power station; The low-frequency power output and the high-frequency power output are respectively divided into low-frequency direct power output and low-frequency indirect power output, as well as high-frequency direct power output and high-frequency indirect power output according to their respective proportions. The low-frequency indirect power output and high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the hybrid energy storage system generates power output. The total output is the sum of the low-frequency direct power output, the high-frequency direct power output, and the power generated by the hybrid energy storage system. A joint scheduling objective function is established based on the total output target, and an energy management strategy for regulating the hybrid energy storage system is determined by minimizing the target value of the objective function. Control commands are output based on the energy management strategy to achieve power control of the hybrid energy storage system.

2. The power control method for hybrid energy storage according to claim 1, characterized in that, The low-frequency indirect power output and the high-frequency indirect power output are respectively input into a hybrid energy storage system composed of at least two energy storage systems, and the power output generated by the hybrid energy storage system includes: The low-frequency indirect power output is input into the first energy storage system, and the first energy storage system outputs the first power generation output. The high-frequency indirect power output is input into the second energy storage system, and the second energy storage system outputs the second power generation output. The sum of the first power generation output and the second power generation output is taken as the power generation output of the hybrid energy storage system.

3. The power control method for hybrid energy storage according to claim 2, characterized in that, The first energy storage system is an electrochemical energy storage system, and the second energy storage system is a flywheel energy storage system.

4. The power control method for hybrid energy storage according to claim 1, characterized in that, The total output, which is the sum of low-frequency direct power output, high-frequency direct power output, and power generated by the hybrid energy storage system, is calculated using the following formula: in, This represents the total power output supplied to the power grid during time period t2. This indicates that the low-frequency output is direct. This represents the first power generation output, and t1 represents the first time series. This indicates direct high-frequency power output. t2 represents the second power generation output, and t2 represents the second time series; the sum of the first power generation output and the second power generation output is the power generation output of the hybrid energy storage system.

5. The power control method for hybrid energy storage according to claim 1 or 4, characterized in that, The step of dividing the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, and high-frequency direct output and high-frequency indirect output according to their respective proportions includes: The low-frequency output is divided into direct low-frequency output and indirect low-frequency output according to a first ratio, and the formula is expressed as follows: in, This indicates that the low-frequency output is direct. Indicates low-frequency indirect power output. Indicates low-frequency output. Indicates the first proportion; It also includes: dividing the high-frequency output into high-frequency direct output and high-frequency indirect output according to a second ratio, the formula of which is as follows: in, This indicates direct high-frequency power output. Indicates high-frequency indirect power output. Indicates high-frequency output. This indicates the second proportion.

6. The power control method for hybrid energy storage according to claim 1, characterized in that, The objective function for joint scheduling based on the total output target is expressed as follows: in, This refers to the total power output supplied to the grid during time period t2. This represents the power generation plan for time period t2, where t2 indicates the second time series.

7. The power control method for hybrid energy storage according to claim 5, characterized in that, The energy management strategy includes setting the first ratio and / or the second ratio.

8. A power control system for hybrid energy storage, characterized in that, It includes power acquisition units, direct power output units, hybrid energy storage systems, and energy management units; The output acquisition unit is used to acquire the low-frequency output and high-frequency output after the output filtering and decomposition of the new energy power station; The direct output unit is used to divide the low-frequency output and the high-frequency output into low-frequency direct output and low-frequency indirect output, as well as high-frequency direct output and high-frequency indirect output, according to their respective proportions. The hybrid energy storage system consists of at least two energy storage systems, used to output the system's power generation output based on the input low-frequency indirect power output and high-frequency indirect power output; The energy management unit is used to establish a joint scheduling objective function based on the total output target, and to determine the energy management strategy for regulating the hybrid energy storage system by minimizing the target value of the objective function. Based on the energy management strategy, it outputs control commands to realize power control of the hybrid energy storage system.

9. An electronic device, characterized in that, It includes a master controller with program code for implementing the power control method of hybrid energy storage as described in any one of claims 1 to 7, and a filter that works in conjunction with the master controller.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the power control method for hybrid energy storage as described in any one of claims 1 to 7.

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