An additional damping control method to improve the oscillation suppression capability of networking equipment

Abstract

The present invention discloses an additional damping control method for improving the oscillation suppression capability of grid-type equipment, comprising: constructing a grid-type converter overall control structure of the converter using a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation; constructing an optimization strategy for additional power instruction limitation control, primary frequency regulation control, primary voltage regulation control and additional damping control of the overall control structure of the grid-type converter, wherein the additional damping control includes: a power oscillation damping controller and a virtual power system stabilizer; and completing the stability control voltage output of the power system through the grid-type converter overall control structure of the additional optimization strategy.

Description

Technical Field

[0001] The present invention relates to the technical field of power system safety and stability control, and more particularly to an additional damping control method for improving the oscillation suppression capability of grid-type equipment. Background Art

[0002] As the proportion of installed capacity of new energy sources continues to increase, the energy structure of the power grid will undergo tremendous changes in the future. The power generation capacity of new energy sources will be affected by the fluctuations of wind and solar resources, and its adjustment ability will be limited, making it difficult to achieve a balance between source and load power. Problems and contradictions such as wind and solar power abandonment, grid stability, and power quality will become increasingly prominent.

[0003] Currently, the control strategy for new energy converters typically adopts grid-following control, which is suitable for grid-connected operation. However, their operation relies on a stable grid and is difficult to achieve active support for voltage, frequency, and inertia, which restricts their large-scale development in new power systems with a high proportion of renewable energy and power electronics. The use of voltage source control based on grid-forming converters enables new energy power generation equipment to actively provide frequency and voltage support, which is conducive to improving the safe and stable operation of the grid and increasing the level of renewable energy power generation and consumption. However, because grid-forming control simulates the inertia and damping characteristics of synchronous motors, its reactive voltage control simulates the dynamic excitation process of synchronous generators. Under heavy loads, this may introduce an equivalent negative damping torque coefficient, causing low-frequency oscillations. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an additional damping control method for improving the oscillation suppression capability of a networking device.

[0005] According to one aspect of the present invention, there is provided an additional damping control method for improving the oscillation suppression capability of a networking device, comprising:

[0006] The overall control structure of the grid-type converter is constructed by using a virtual synchronous control method based on the generator rotor motion equation and transient voltage equation.

[0007] Construct an optimization strategy for the additional power command limit control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-connected converter, where the additional damping control includes a power oscillation damping controller and a virtual power system stabilizer;

[0008] The stability control voltage output of the power system is achieved through the overall control structure of the grid-type converter with additional optimization strategy.

[0009] Optionally, a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation is used to construct the overall control structure of the grid-type converter, including:

[0010] Through virtual synchronous control, the virtual internal potential voltage reference value E is output ref and phase angle reference value θ ref ;

[0011] The virtual internal potential voltage reference value E ref and phase angle reference value θ ref Input overcurrent limit model, output control virtual internal potential voltage reference value E ref It is converted to a three-phase stationary coordinate system and sent to the PWM generator to generate trigger pulses that meet control requirements and construct the overall control structure of the grid-type converter.

[0012] Optionally, the power oscillation damping controller uses the damping signal generated by the difference between the frequency generated inside the converter and the grid frequency as an additional input signal to the converter active power control loop, and its transfer function is:

[0013]

[0014] Where K d is the power oscillation damping control magnification, T r1 is the time constant of the filter link, T w5 、T w6 is the DC blocking time constant, T9, T 10 、T 11 、T 12 is the time constant of the lead-lag link. For a certain dominant characteristic root λ, its amplitude and phase can be expressed as:

[0015]

[0016] Optionally, the virtual power system stabilizer is introduced in the virtual excitation control link, and its transfer function expression is:

[0017]

[0018] Where K w , K P is the deviation magnification, T rw 、T rP is the time constant of the filter link, T w1 、T w2 、T w3 、T w4 is the DC isolation time constant, and T1-T8 are the lead-lag link time constants.

[0019] According to another aspect of the present invention, there is provided an additional damping control device for improving the oscillation suppression capability of a networking device, comprising:

[0020] The first building module is used to build a grid-type converter overall control structure of the converter using a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation;

[0021] The second building block is used to construct an optimization strategy for additional power command limit control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-type converter, where the additional damping control includes a power oscillation damping controller and a virtual power system stabilizer;

[0022] The output module is used to complete the stability control voltage output of the power system through the overall control structure of the grid-type converter with additional optimization strategy.

[0023] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute the method according to any one of the above aspects of the present invention.

[0024] According to another aspect of the present invention, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor for reading the executable instructions from the memory and executing the instructions to implement the method described in any one of the above aspects of the present invention.

[0025] Therefore, this paper proposes an additional damping control method to enhance the oscillation suppression capability of grid-connected equipment. By introducing a virtual power system stabilizer and a power oscillation damping controller, this enhanced virtual damping control capability is achieved. This method offers flexible control, strong scalability, and high system reliability. It is beneficial for smoothing fluctuations in renewable energy power output, improving the grid's ability to accommodate renewable energy generation, and promoting the development and utilization of renewable energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0027] Figure 1 1 is a flow chart of an additional damping control method for improving the oscillation suppression capability of a network-type device provided by an exemplary embodiment of the present invention;

[0028] Figure 2 1 is a schematic structural diagram of an additional damping control method for improving the oscillation suppression capability of a network-type device provided by an exemplary embodiment of the present invention;

[0029] Figure 3 1 is a schematic structural diagram of an additional damping control device for improving the oscillation suppression capability of a network-type device provided by an exemplary embodiment of the present invention;

[0030] Figure 4This is a structure of an electronic device provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0031] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0032] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0033] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0034] It should also be understood that, in the embodiments of the present invention, “a plurality of” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0035] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0036] In addition, the term "and / or" in this invention merely describes an association relationship between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this invention generally indicates that the related objects are in an "or" relationship.

[0037] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced with each other. For the sake of brevity, they will not be described one by one.

[0038] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] Embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate in conjunction with numerous other general-purpose or specialized computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments, and / or configurations suitable for use with terminal devices, computer systems, servers, and other electronic devices include, but are not limited to, personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputer systems, mainframe computer systems, and distributed cloud computing technology environments including any of the above.

[0043] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system-executable instructions (such as program modules) executed by a computer system. Generally, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in a distributed cloud computing environment, where tasks are performed by remote processing devices linked via a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media, including storage devices.

[0044] Exemplary Methods

[0045] Figure 1 This is a flow chart of an additional damping control method for improving the oscillation suppression capability of a network-type device provided by an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as Figure 1 As shown, the additional damping control method 100 for improving the oscillation suppression capability of a network-type device includes the following steps:

[0046] Step 101, constructing a grid-type converter overall control structure of the converter using a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation;

[0047] Step 102: constructing an optimization strategy for additional power command limit control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-connected converter, wherein the additional damping control includes a power oscillation damping controller and a virtual power system stabilizer;

[0048] Step 103 : Complete the stability control voltage output of the power system through the overall control structure of the grid-connected converter with the additional optimization strategy.

[0049] Specifically, the present invention proposes an additional damping control method to enhance the oscillation suppression capability of grid-type equipment. By introducing a virtual power system stabilizer and a power oscillation damping controller, the virtual damping control capability is enhanced, which is beneficial to solving the power oscillation problem caused by the grid connection of a high proportion of new energy units.

[0050] The present invention provides an additional damping control method for improving the oscillation suppression capability of network-type equipment, such as Figure 2 As shown, the control strategy includes the following steps:

[0051] (1) Overall control structure of grid-connected converter. The control strategy of grid-connected converter adopts virtual synchronous control method based on generator rotor motion equation and transient voltage equation. At the same time, it can add optimization control strategies such as power command limit control, primary frequency regulation control, primary voltage regulation control and additional damping control (virtual power system stabilizer), and make the converter equivalent to a controllable voltage source with synchronous generator output characteristics. The structured control framework of grid-connected converter is as follows: Figure 2 As shown. The typical model of network-type outer loop control can be expressed as:

[0052]

[0053] Among them, T J is the virtual inertia time constant; ω is the virtual angular velocity of the converter output internal potential; P ref is the power reference value, corresponding to the input mechanical power of the traditional synchronous machine; P e is the actual output active power of the converter; D is the virtual damping coefficient; ω0 is the rated angular velocity of the system; θ is the virtual internal potential phase angle output by the energy storage converter. m is the virtual internal potential amplitude of the converter output; G(s) is the converter virtual excitation control transfer function; V ref is the reference voltage; V is the actual voltage signal of the control point calculated.

[0054] Through virtual synchronous control, the virtual internal potential voltage reference value E is output ref and phase angle reference value θ ref , and then through the overcurrent limiting model, current limiting can be achieved through virtual impedance or vector reshaping. The final output control voltage is converted to the three-phase stationary coordinate system and sent to the PWM generator to generate trigger pulses that meet the control needs and complete the overall output control.

[0055] (2) Power oscillation damping controller. The power oscillation damping suppressor uses the damping signal generated by the difference between the frequency generated inside the converter and the grid frequency as the input additional signal of the converter active power control loop. The control structure is shown in Figure 2 , its transfer function expression is:

[0056]

[0057] Among them, K d is the power oscillation damping control magnification, T r1 is the time constant of the filter link, T w5 、T w6 is the DC blocking time constant, T9, T 10 、T 11 、T 12 is the time constant of the lead-lag link. When oscillation occurs, the power oscillation damping controller generates a virtual incremental torque opposite to the virtual speed deviation of the grid-type converter, providing a virtual positive damping torque for the system. The filtering link and two-stage DC isolation link in this model provide bandpass filtering of the oscillation frequency band. Adjusting the time constant of the lead-lag link can reconfigure the dominant oscillation poles and improve the system's damping characteristics. For a dominant characteristic root λ, its amplitude and phase can be expressed as:

[0058]

[0059] (3) Virtual power system stabilizer. A control strategy similar to the power system stabilizer (PSS) in synchronous machines is introduced into the virtual excitation control link. Phase compensation is designed using the two signals of grid-type speed deviation and power deviation to prevent the reverse adjustment problem that may be caused by a single input signal. The control structure is shown in Figure 2 . Its transfer function expression is:

[0060]

[0061] Among them, K w , K P is the deviation magnification, T rw 、T rP is the time constant of the filter link, T w1 、T w2 、T w3 、T w4 is the DC isolation time constant, and T1-T8 are the lead-lag link time constants. The principle of the virtual power system stabilizer is to process the additional control signal so that the input signal produces a phase shift after passing through the transfer function, ultimately causing the virtual electromagnetic torque to generate a positive damping torque component, providing a positive damping effect.

[0062] Therefore, this paper proposes an additional damping control method to enhance the oscillation suppression capability of grid-connected equipment. By introducing a virtual power system stabilizer and a power oscillation damping controller, this enhanced virtual damping control capability is achieved. This method offers flexible control, strong scalability, and high system reliability. It is beneficial for smoothing fluctuations in renewable energy power output, improving the grid's ability to accommodate renewable energy generation, and promoting the development and utilization of renewable energy.

[0063] Exemplary devices

[0064] Figure 3 FIG. 1 is a schematic diagram of the structure of an additional damping control device for improving the oscillation suppression capability of a network-type device provided by an exemplary embodiment of the present invention. Figure 3 As shown, the apparatus 300 includes:

[0065] A first construction module 310 is used to construct a grid-type converter overall control structure of the converter using a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation;

[0066] A second building module 320 is used to build an optimization strategy for additional power command limit control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-type converter, wherein the additional damping control includes: a power oscillation damping controller and a virtual power system stabilizer;

[0067] The output module 330 is used to complete the stability control voltage output of the power system through the overall control structure of the grid-type converter with additional optimization strategy.

[0068] Optionally, the first building block 310 includes:

[0069] The first output submodule is used to output a virtual internal potential voltage reference value E through virtual synchronous control. ref and phase angle reference value θ ref ;

[0070] The second output submodule is used to convert the virtual internal potential voltage reference value E ref and phase angle reference value θ ref Input overcurrent limit model, output control virtual internal potential voltage reference value E ref It is converted to a three-phase stationary coordinate system and sent to the PWM generator to generate trigger pulses that meet control requirements and construct the overall control structure of the grid-type converter.

[0071] Optionally, the power oscillation damping controller uses the damping signal generated by the difference between the frequency generated inside the converter and the grid frequency as an additional input signal to the converter active power control loop, and its transfer function is:

[0072]

[0073] Where K d is the power oscillation damping control magnification, T r1 is the time constant of the filter link, T w5 、T w6 is the DC blocking time constant, T9, T 10 、T 11 、T 12 is the time constant of the lead-lag link. For a certain dominant characteristic root λ, its amplitude and phase can be expressed as:

[0074]

[0075] Optionally, the virtual power system stabilizer is introduced in the virtual excitation control link, and its transfer function expression is:

[0076]

[0077] Where K w , K P is the deviation magnification, T rw 、T rP is the time constant of the filter link, T w1 、T w2 、T w3 、T w4 is the DC isolation time constant, and T1-T8 are the lead-lag link time constants.

[0078] Exemplary electronic devices

[0079] Figure 4 This is the structure of an electronic device provided by an exemplary embodiment of the present invention. Figure 4 As shown, the electronic device 40 includes one or more processors 41 and a memory 42 .

[0080] The processor 41 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0081] The memory 42 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may, for example, include read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 41 may execute the program instructions to implement the methods of the software programs of the various embodiments of the present invention described above and / or other desired functions. In one example, the electronic device may further include: an input device 43 and an output device 44, which are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0082] In addition, the input device 43 may also include, for example, a keyboard, a mouse, and the like.

[0083] The output device 44 can output various information to the outside. The output device 44 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto.

[0084] Of course, to simplify, Figure 4 Only some of the components related to the present invention in the electronic device are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, the electronic device may further include any other appropriate components according to specific application conditions.

[0085] Exemplary computer program products and computer-readable storage media

[0086] In addition to the above-mentioned methods and devices, an embodiment of the present invention may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to perform the steps of the method according to various embodiments of the present invention described in the above "Exemplary Method" section of this specification.

[0087] The computer program product may be written in any combination of one or more programming languages ​​to implement the operations of embodiments of the present invention, including object-oriented programming languages ​​such as Java, C++, and conventional procedural programming languages ​​such as C or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a stand-alone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0088] In addition, an embodiment of the present invention may also be a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present invention described in the above "Exemplary Method" section of this specification.

[0089] The computer-readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, include but is not limited to a system, system or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0090] The basic principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in the present invention are merely illustrative and non-limiting, and should not be construed as necessarily possessed by each embodiment of the present invention. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, and are not intended to be limiting. These details do not necessarily limit the present invention to being implemented using these specific details.

[0091] Each embodiment in this specification is described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. References to the same or similar parts between the various embodiments are sufficient. For system embodiments, since they largely correspond to method embodiments, their description is relatively simple. For relevant parts, references to the description of the method embodiments are sufficient.

[0092] The block diagrams of the devices, systems, equipment, and systems involved in the present invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, systems, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "including," "comprising," "having," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0093] The method and system of the present invention may be implemented in many ways. For example, the method and system of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above sequence of steps for the method is for illustration only, and the steps of the method of the present invention are not limited to the sequence specifically described above, unless otherwise specified. In addition, in some embodiments, the present invention may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present invention. Thus, the present invention also covers recording media that store programs for executing the method according to the present invention.

[0094] It should also be noted that, in the system, device and method of the present invention, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. The above description of the disclosed aspects is provided to enable any technician in this field to make or use the present invention. Various modifications to these aspects will be very obvious to those skilled in the art, and the general principles defined here can be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown here, but according to the widest scope consistent with the principles disclosed here and novel features.

[0095] The above description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An additional damping control method for improving the oscillation suppression capability of a network-type device, characterized in that: include: The overall control structure of the grid-type converter is constructed by using a virtual synchronous control method based on the generator rotor motion equation and transient voltage equation. Constructing an optimization strategy for additional power command limitation control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-connected converter, wherein the additional damping control includes: a power oscillation damping controller and a virtual power system stabilizer; The stability control voltage output of the power system is completed by adding the optimization strategy to the overall control structure of the grid-type converter; The virtual power system stabilizer is introduced in the virtual excitation control link, and its transfer function expression is: Where K w , K P is the deviation magnification, T rw 、T rP is the time constant of the filter link, T w1 、T w2 、T w3 、T w4 is the DC isolation time constant, T1-T8 is the lead-lag link time constant, △w is the speed deviation, and △P is the power deviation.

2. The method according to claim 1, characterized in that The overall control structure of the grid-type converter is constructed by using a virtual synchronous control method based on the generator rotor motion equation and transient voltage equation, including: Through virtual synchronous control, the virtual internal potential voltage reference value E is output ref and phase angle reference value θ ref ; The virtual internal potential voltage reference value E ref and phase angle reference value θ ref Input the overcurrent limiting model and output the virtual internal potential voltage reference value E ref The data is converted into a three-phase stationary coordinate system and sent to a PWM generator for generating trigger pulses that meet control requirements, thereby constructing the overall control structure of the grid-type converter.

3. The method according to claim 2, characterized in that The power oscillation damping controller uses the damping signal generated by the difference between the frequency generated inside the converter and the grid frequency as the input additional signal of the converter active control loop, and its transfer function is: Where K d is the power oscillation damping control magnification, T r1 is the time constant of the filter link, T w5 、T w6 is the DC blocking time constant, T9, T 10 、T 11 、T 12 is the time constant of the lead-lag link. For the dominant characteristic root λ, its amplitude and phase are expressed as:

4. An additional damping control device for improving the oscillation suppression capability of a network-type device, characterized in that: include: The first building module is used to build a grid-type converter overall control structure of the converter using a virtual synchronous control method based on the generator rotor motion equation and the transient voltage equation; A second building block is used to construct an optimization strategy for additional power instruction limit control, primary frequency regulation control, primary voltage regulation control, and additional damping control of the overall control structure of the grid-type converter, wherein the additional damping control includes: a power oscillation damping controller and a virtual power system stabilizer; An output module, configured to achieve stability control voltage output of the power system by adding the optimization strategy to the overall control structure of the grid-type converter; The virtual power system stabilizer is introduced in the virtual excitation control link, and its transfer function expression is: Where K w , K P is the deviation magnification, T rw 、T rP is the time constant of the filter link, T w1 、T w2 、T w3 、T w4 is the DC isolation time constant, T1-T8 is the lead-lag link time constant, △w is the speed deviation, and △P is the power deviation.

5. The device according to claim 4, characterized in that The first building block includes: The first output submodule is used to output a virtual internal potential voltage reference value E through virtual synchronous control. ref and phase angle reference value θ ref ; The second output submodule is used to output the virtual internal potential voltage reference value E ref and phase angle reference value θ ref Input the overcurrent limiting model and output the virtual internal potential voltage reference value E ref The data is converted into a three-phase stationary coordinate system and sent to a PWM generator for generating trigger pulses that meet control requirements, thereby constructing the overall control structure of the grid-type converter.

6. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 1 to 3.

7. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method according to any one of claims 1 to 3.

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