Virtual Power Angle Control Method, System, Device and Medium for Grid-Following Inverters

Abstract

The present invention belongs to the technical field of grid-following converter control, and discloses a virtual power angle control method, system, device and medium for a grid-following converter. The method of the present invention includes: obtaining the instantaneous data of the AC port of the grid-following converter, and calculating based on the instantaneous data of the AC port to obtain the active regulation variable of the phase-locked loop; through abc / dq transformation and PI control, finally generating the trigger pulse of the grid-following converter to achieve virtual power angle control. By effectively designing the control parameters of the phase-locked loop, the output of the phase-locked loop can be related to the deviations of active power and reactive power, thereby realizing the active regulation functions of active power-frequency and reactive power-voltage of the grid-following converter based on virtual power angle control. It is applicable to all types of grid-following converters, has a wide application range, does not require changing the existing general control framework structure, has a low application cost, and takes into account both stability and economy.

Description

Technical Field

[0001] The present invention belongs to the technical field of grid-following converter control, and particularly relates to a virtual power angle control method, system, device and medium for grid-following converters. Background Art

[0002] With the continuous increase in the access ratio of new energy power generation systems such as wind energy and solar energy to the power grid, the high penetration of these new energy power generation systems poses a severe challenge to the stability of the power grid. The inherent volatility of new energy power generation systems undoubtedly exacerbates the risk of power grid stability. In this context, converters, as key components for power grid stability, are becoming increasingly important.

[0003] Currently, in commercial equipment of new energy power generation systems, the AC ports of converters interacting with the power grid generally adopt a grid-following control strategy based on a phase-locked loop (PLL), and such converters are collectively referred to as grid-following converters. However, with the wide application of grid-following converters in the power grid, the inertia, active power, and reactive power characteristics of the power grid have all changed significantly, and the stability problems of power grid frequency and voltage are particularly prominent. To address this challenge, grid-forming converters have emerged and received extensive attention. Compared with grid-following converters, a significant feature of grid-forming converters is their ability to simulate two key functions of synchronous generators: one is the generation of internal electromotive force, and the other is the simulation of the active swing equation and the reactive excitation equation. Figure 1 For the existing grid-following control framework, Figure 2 For the existing grid-forming control framework. Although grid-forming converters can, to a certain extent, solve the problems of the active regulation of the converter for grid voltage-reactive power and frequency-active power, the application of grid-forming converters is not easy. According to Figure 1 and Figure 2 it can be known that since the conventional grid-forming converter does not include a PLL (Phase-Locked-Loop), its control architecture is essentially different from that of grid-following converters. If the grid-forming converter provided by the existing technology is directly applied to achieve active regulation of the power grid, it will be necessary to change the control structure of existing commercial equipment and will have to reconstruct the control structure of existing commercial equipment, which will undoubtedly bring high economic costs.

[0004] In summary, the existing converter control technology cannot balance stability and economy and has obvious deficiencies. Summary of the Invention

[0005] Based on the above-mentioned disadvantages and deficiencies in the prior art, one of the objectives of the present invention is to at least solve one or more of the above-mentioned problems existing in the prior art. In other words, one of the objectives of the present invention is to provide a virtual power angle control method, system, device and medium for a grid-following converter that meet one or more of the aforementioned requirements, so as to be more applicable to existing commercial converter devices, reduce economic costs, and at the same time achieve active power-frequency and reactive power-voltage stability control of the converter for the power grid, so as to effectively solve the problem of the integration of the active support of the converter and the grid-following framework.

[0006] To achieve the above-mentioned invention objectives, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a virtual power angle control method for a grid-following converter, including the steps of: S1. Obtain the instantaneous data of the AC port of the grid-following converter, and the instantaneous data of the AC port includes the instantaneous voltage measurement value v m g , the instantaneous active power measurement value P m , the instantaneous reactive power measurement value Q m and the instantaneous current measurement value i m g ; S2. Calculate based on the instantaneous data of the AC port to obtain the active control variables of the phase-locked loop, and the active control variables of the phase-locked loop include the active power-frequency active control variable and the reactive power-voltage active control variable ; S3. Perform abc / dq transformation on the instantaneous voltage measurement value v m g and the reactive power-voltage active control variable respectively to obtain the corresponding dq values, and obtain the inner-loop control current values and through PI control; S4. Perform abc / dq transformation on the instantaneous current measurement value i m g to obtain the corresponding dq values, combine the inner-loop control current values and , and obtain the control output value of the three-phase voltage through PI control to generate the trigger pulse of the grid-following converter to achieve virtual power angle control.

[0008] As a preferred solution, the step S2 of calculating based on the instantaneous data of the AC port to obtain the active control variables of the phase-locked loop includes the steps of: performing a complex form transformation on the instantaneous voltage measurement value v m g to obtain its imaginary part im(v m g ); based on the imaginary part im(v m g)Perform virtual active power deviation calculation to obtain the virtual active power deviation result; obtain the proportionality coefficient K P And perform proportional calculation based on the virtual active power deviation result to obtain the active power - frequency active regulation variable .

[0009] As a preferred solution, the step of calculating based on the instantaneous data of the AC port in step S2 to obtain the PLL active regulation variable further includes the steps: based on the imaginary part im(v m g )Perform virtual reactive power deviation calculation to obtain the virtual reactive power deviation result; obtain the proportionality coefficient K Q And perform proportional calculation based on the virtual reactive power deviation result to obtain the reactive power - voltage active regulation variable .

[0010] As a preferred solution, the formula for the virtual active power deviation calculation is:

[0011] , where Is the instantaneous voltage measurement value v m g Real part, is the filtering coefficient of the virtual active power deviation calculation link, i q ref Is the q - axis current component generated by the target reactive power.

[0012] As a preferred solution, the formula for the virtual reactive power deviation calculation is:

[0013] , where Is the instantaneous voltage measurement value v m g Real part, Is the filtering coefficient of the virtual reactive power deviation calculation link, i d ref Is the d - axis current component generated by the target active power.

[0014] As a preferred solution, the expression of the active power - frequency active regulation variable Is:

[0015] , where im(v m g )And Are respectively the imaginary part and the real part of the instantaneous voltage measurement value v m g Imaginary part and real part, i d ref Is the d - axis current component generated by the target active power, K Q Is the proportionality coefficient, is the filtering coefficient of the virtual active power deviation calculation link.

[0016] As a preferred solution, the reactive power-voltage active regulation variable has the following expression:

[0017] , where im(v m g ) and are the imaginary part and real part of the instantaneous voltage measurement value v m g respectively, i q ref is the q-axis current component generated by the target reactive power, K P is the proportionality coefficient, is the filtering coefficient of the virtual reactive power deviation calculation link.

[0018] In a second aspect, the present invention provides a virtual power angle control system for a grid-connected converter, which is used to implement the virtual power angle control method for the grid-connected converter as described in the first aspect.

[0019] In a third aspect, the present invention provides an electronic device, which includes a memory, a processor, and a computer program. When the computer program is executed by the processor, it implements the virtual power angle control method for the grid-connected converter as described in the first aspect.

[0020] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor, it implements the virtual power angle control method for the grid-connected converter as described in the first aspect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] By effectively designing the control parameters of the phase-locked loop, the output of the phase-locked loop can be related to the deviations of active power and reactive power, thereby realizing the active regulation functions of active power-frequency and reactive power-voltage based on virtual power angle control for grid-connected converters. It is applicable to all types of grid-connected converters, has a wide application range, does not require changing the existing general control framework structure, has a low application cost, and takes into account both stability and economy.

[0023] Further or more detailed beneficial effects will be described in combination with specific embodiments in the specific implementation manners. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is the existing network-following type control framework.

[0026] Figure 2 is the existing network-forming type control framework.

[0027] Figure 3 is a schematic diagram of the principle of the virtual power angle control method for the network-following type converter according to the embodiment of the present invention.

[0028] Figure 4 is a schematic diagram of the calculation principle of the d-axis and q-axis current components generated by the target active power according to the embodiment of the present invention.

[0029] Figure 5 is a schematic diagram of the structure of the phase-locked loop according to the embodiment of the present invention.

[0030] Figure 6 is a structural diagram of the electronic device provided by the embodiment of the present invention.

[0031] Reference numerals in the drawings:

[0032] 600, electronic device;

[0033] 601, processor; 602, communication bus; 603, user interface; 604, network interface; 605, memory. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0035] In the following introduction, multiple embodiments of the present invention are provided. Different embodiments can be replaced or combined. Therefore, the present invention can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present invention should also be considered to include embodiments containing all other possible combinations of A, B, C, and D, even though such embodiments may not be explicitly described in the following content.

[0036] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements described without departing from the scope of the present disclosure. Various processes or components may be appropriately omitted, substituted, or added to each example. For example, the methods described may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with respect to some examples may be combined with other examples.

[0037] To facilitate a better understanding of the embodiments of the present invention, before explaining the specific embodiments of the present invention in detail, its application scenarios will be described first.

[0038] The virtual power angle control method for the grid-following converter described in the embodiments of this specification is applied in the active regulation process of the power grid. In these scenarios, the implementation of the virtual power angle control method for the grid-following converter mainly aims to achieve the stability and reliability of the power grid. By precisely controlling the virtual power angle of the converter, the power flow of the power grid can be effectively regulated, thereby ensuring the stable operation of the power grid under various operating conditions. The application of this method aims to provide a reliable performance guarantee to ensure that the power grid can remain stable, reduce power outage events, and improve the operating efficiency and reliability of the entire power system when facing load fluctuations, fault recovery, and other various operating challenges.

[0039] The following provides a simple explanation of the phase-locked loop, the AC port of the converter, and the actively regulated variables of the phase-locked loop involved in multiple embodiments of this specification:

[0040] A phase-locked loop is a closed-loop feedback control system used to achieve phase synchronization between two signals. It mainly consists of a phase detector, a loop filter, and a voltage-controlled oscillator (VCO), and sometimes includes a frequency divider. The working principle of the phase-locked loop is that the phase detector compares the phase difference between the input reference signal and the output signal of the voltage-controlled oscillator, and then generates an error signal. This error signal is processed by the loop filter and used to adjust the frequency of the voltage-controlled oscillator, so that the phase of the output signal gradually synchronizes with the phase of the input reference signal.

[0041] The AC port of the converter refers to the interface on the converter that is connected to the power grid or other AC devices. These ports are usually used to transmit AC electrical energy, including voltage and current. In a power electronics system, the converter is usually used to convert DC electrical energy into AC electrical energy, or to convert one form of AC electrical energy into another form of AC electrical energy. The design of the AC port of the converter needs to consider factors such as voltage level, current capacity, frequency characteristics, and electrical isolation to ensure safe, reliable, and efficient electrical energy transmission.

[0042] The active regulation variables of the phase-locked loop refer to the variables used to adjust the phase and frequency of the output signal of the voltage-controlled oscillator in the phase-locked loop control system. These variables are usually obtained after the error signal generated by the phase detector is processed by the loop filter. During the operation of the phase-locked loop, the active regulation variables will be dynamically adjusted according to the phase difference between the input reference signal and the output signal of the voltage-controlled oscillator to achieve phase synchronization between the two signals. The specific forms of the active regulation variables of the phase-locked loop may include voltage control signals, frequency control signals, or phase control signals, etc., depending on the design and application scenarios of the phase-locked loop. By precisely controlling these active regulation variables, the phase-locked loop can achieve high-precision phase synchronization and frequency tracking functions.

[0043] Embodiment 1:

[0044] As Figure 3 shown, this embodiment provides a virtual power angle control method for a grid-connected converter, including the steps of: S1, obtaining the instantaneous data of the AC port of the grid-connected converter, where the instantaneous data of the AC port includes the instantaneous voltage measurement value v m g , the instantaneous active power measurement value P m , the instantaneous reactive power measurement value Q m and the instantaneous current measurement value i m g ; S2, calculating based on the instantaneous data of the AC port to obtain the active regulation variables of the phase-locked loop, where the active regulation variables of the phase-locked loop include the active-frequency active regulation variable and the reactive-voltage active regulation variable ; S3, respectively performing abc / dq transformation on the instantaneous voltage measurement value v m g and the reactive voltage active regulation variable to obtain the corresponding dq values, and obtaining the inner-loop control current values and through PI control; S4, performing abc / dq transformation on the instantaneous current measurement value i m g to obtain the corresponding dq values, combining the inner-loop control current values and , and obtaining the control output value of the three-phase voltage through PI control to generate the trigger pulse of the grid-connected converter to achieve virtual power angle control.

[0045] Specifically, this embodiment provides a preferred implementation manner. The step of calculating based on the instantaneous data of the AC port in step S2 to obtain the active regulation variables of the phase-locked loop includes the steps of: for the instantaneous voltage measurement value v m gPerform a plural form transformation to obtain its imaginary part im(v m g ); Based on the imaginary part im(v m g ) perform a virtual active power deviation calculation to obtain a virtual active power deviation result; Obtain a proportionality coefficient K P and perform a proportional calculation based on the virtual active power deviation result to obtain an active - frequency active regulation variable .

[0046] Specifically, this embodiment provides a preferred implementation manner. The step of calculating based on the instantaneous data of the AC port to obtain the PLL active regulation variable in step S2 further includes the steps: Based on the imaginary part im(v m g ) perform a virtual reactive power deviation calculation to obtain a virtual reactive power deviation result; Obtain a proportionality coefficient K Q and perform a proportional calculation based on the virtual reactive power deviation result to obtain a reactive - voltage active regulation variable .

[0047] Specifically, this embodiment provides a preferred implementation manner. The formula for the virtual active power deviation calculation is: , where is the instantaneous voltage measurement value v m g real part, is the filtering coefficient of the virtual active power deviation calculation link, i q ref is the q - axis current component generated by the target reactive power. More specifically, i q ref can be calculated based on the principle shown in Figure 4 .

[0048] Specifically, this embodiment provides a preferred implementation manner. The formula for the virtual reactive power deviation calculation is: , where is the instantaneous voltage measurement value v m g real part, is the filtering coefficient of the virtual reactive power deviation calculation link, i d ref is the d - axis current component generated by the target active power. More specifically, i d ref can be calculated based on the principle shown in Figure 4 .

[0049] Specifically, this embodiment provides a preferred implementation manner. The expression of the active - frequency active regulation variable is: , where \(im(v m g )\) and are the imaginary part and real part of the instantaneous voltage measurement value \(v m g \) respectively, \(i d ref \) is the d-axis current component generated by the target active power, \(K Q \) is the proportional coefficient, is the filtering coefficient of the virtual active power deviation calculation link.

[0050] Specifically, this embodiment provides a preferred implementation manner, and the expression of the reactive-voltage active regulation variable is: , where \(im(v m g )\) and are the imaginary part and real part of the instantaneous voltage measurement value \(v m g \) respectively, \(i q ref \) is the q-axis current component generated by the target reactive power, \(K P \) is the proportional coefficient, is the filtering coefficient of the virtual reactive power deviation calculation link.

[0051] Furthermore, the phase-locked loop in this embodiment is as Figure 5 shown. Considering that there is a right-angle relationship between the imaginary part \(im( m g \) of the instantaneous voltage measurement value \(v v m g )\) and the real part \(re( v m g )\) in the complex frequency domain. Therefore, in the s domain, there is a relationship . Based on this, the expression of the active regulation variable of the phase-locked loop can be transformed into . And the overall transfer function of the active-power-frequency in the prior art is . By comparing the above two expressions, it can be seen that the virtual power angle control method of the grid-following converter in this embodiment does not need to change the control architecture of the phase-locked loop, and only needs to optimize the parameter design to achieve stable control, that is, this embodiment is applicable to existing commercial converter devices, effectively solving the problem of the integration of converter active support and the grid-following framework.

[0052] Embodiment 2:

[0053] This embodiment provides a virtual power angle control system for a grid-following converter, which is used to implement the virtual power angle control method of the grid-following converter as described in Embodiment 1.

[0054] Embodiment 3:

[0055] As Figure 5 shown, this embodiment provides an electronic device, which may include: at least one processor, at least one network interface, a user interface, a memory, and at least one communication bus.

[0056] Among them, the communication bus can be used to realize the connection and communication of the above-mentioned various components.

[0057] Among them, the user interface may include buttons, and the optional user interface may further include a standard wired interface and a wireless interface.

[0058] Among them, the network interface may but is not limited to include a Bluetooth module, an NFC module, a Wi-Fi module, etc.

[0059] Among them, the processor may include one or more processing cores. The processor uses various interfaces and lines to connect various parts within the entire electronic device, and by running or executing instructions, programs, code sets, or instruction sets stored in the memory, and calling data stored in the memory, it executes various functions of the electronic device and processes data. Optionally, the processor may be implemented in at least one of the hardware forms of DSP, FPGA, and PLA. The processor may integrate one or a combination of several of CPU, GPU, and modem, etc. Among them, the CPU mainly processes the operating system, the user interface, and application programs, etc.; the GPU is responsible for the rendering and drawing of the content to be displayed on the display screen; the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor and may be implemented separately by a single chip.

[0060] Among them, the memory may include RAM and may also include ROM. Optionally, the memory includes a non-transitory computer-readable medium. The memory can be used to store instructions, programs, codes, code sets, or instruction sets. The memory may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store the data involved in the above-mentioned various method embodiments, etc. Optionally, the memory may further be at least one storage device located away from the aforementioned processor. As a computer storage medium, the memory may include an operating system, a network communication module, a user interface module, and a control application program. The processor may be used to call the control application program stored in the memory and execute the steps of the network-type converter virtual power angle control method mentioned in the foregoing embodiments.

[0061] Embodiment 4:

[0062] This embodiment provides a computer-readable storage medium, in which instructions are stored. When the instructions are run on a computer or a processor, the computer or the processor is caused to execute one or more steps in the above Figure 3 illustrated embodiments. If each component module of the above electronic device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in the computer-readable storage medium.

[0063] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this specification are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Versatile Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)), etc.

[0064] Those of ordinary skill in the art can understand that all or part of the processes in implementing the method in the above Embodiment 1 can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above various methods. The foregoing storage medium includes: various media such as ROM, RAM, magnetic disks, or optical discs that can store program codes. Without conflict, the technical features in this embodiment and the implementation solutions can be combined arbitrarily.

[0065] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0066] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The foregoing are only exemplary embodiments of the present invention and should not be used to limit the scope of the present invention. That is, all equivalent changes and modifications made in accordance with the teachings of the present invention still fall within the scope of the present invention. After considering the specification and practicing the disclosure herein, those skilled in the art will readily think of other implementations of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not recorded in the present invention. The specification and embodiments are only regarded as exemplary, and the scope and spirit of the present invention are defined by the claims.

Claims

1. A virtual power angle control method for a grid-following converter, characterized in that Including the steps: S1. Obtain the instantaneous data of the AC port of the grid-connected converter, where the instantaneous data of the AC port includes the instantaneous voltage measurement value v m g , the instantaneous active power measurement value P m , the instantaneous reactive power measurement value Q m and the instantaneous current measurement value i m g ; S2. Calculate based on the instantaneous data of the AC port to obtain the PLL active regulation variables, where the PLL active regulation variables include the active - frequency active regulation variable and the reactive - voltage active regulation variable ; Calculating based on the instantaneous data of the AC port to obtain the active regulation variables of the phase-locked loop, including: performing a complex form transformation on the instantaneous voltage measurement value v m g to obtain its imaginary part im(v m g ), calculating the virtual active power deviation and the virtual reactive power deviation respectively based on the imaginary part im(v m g ) to obtain the virtual active power deviation result and the virtual reactive power deviation result respectively, obtaining the proportionality coefficient K P and performing a proportional calculation based on the virtual active power deviation result to obtain the active-frequency active regulation variable , obtaining the proportionality coefficient K Q and performing a proportional calculation based on the virtual reactive power deviation result to obtain the reactive-voltage active regulation variable ; S3. Perform abc / dq transformation on the instantaneous voltage measurement value v m g and the reactive voltage active regulation variable respectively to obtain the corresponding dq values, and obtain the inner-loop control current value through PI control and ; S4. Measure the instantaneous value i of the current m g Perform abc / dq transformation to obtain the corresponding dq values, and combine with the inner-loop controlled current value and , and obtain the controlled output value of the three-phase voltage through PI control , so as to generate the trigger pulse of the grid-connected converter to achieve virtual power angle control.

2. The virtual power angle control method of a grid-following converter according to claim 1, wherein The formula for calculating the virtual active power deviation is: ， In the formula, is the instantaneous value v of the voltage measurement m g real part, is the filtering coefficient of the virtual active power deviation calculation link, i q ref is the q-axis current component generated by the target reactive power.

3. A virtual power angle control method for a grid-following converter according to claim 2, characterized in that The formula for calculating the virtual reactive power deviation is: ， Wherein, is the instantaneous value v of the voltage measurement m g real part, is the filtering coefficient of the virtual reactive power deviation calculation link, i d ref is the d-axis current component generated by the target active power.

4. A virtual power angle control method for a grid-following converter according to claim 3, characterized in that The active power-frequency active regulation variable has the following expression: ， wherein, im(v m g ) and are respectively the imaginary part and the real part of the instantaneous value v m g of the voltage measurement, i q ref is the q-axis current component generated by the target reactive power, K P is the proportionality coefficient, is the filtering coefficient of the virtual active power deviation calculation link.

5. A virtual power angle control method for a grid-following converter according to claim 4, characterized in that The reactive power-voltage active regulation variable has the following expression: ， wherein, im(v m g ) and are respectively the imaginary part and the real part of the instantaneous voltage measurement value v m g , i d ref is the d-axis current component generated by the target active power, i q ref is the q-axis current component generated by the target reactive power, K Q is the proportionality coefficient, is the filtering coefficient of the virtual reactive power deviation calculation link.

6. A virtual power angle control system for a grid-following converter, characterized in that, For implementing the virtual power angle control method of the grid-following converter according to any one of claims 1 to 5.

7. A computer device, the computer device comprising a memory, a processor, and a computer program, characterized in that, When the computer program is executed by a processor, it implements the virtual power angle control method of the grid-following converter according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the virtual power angle control method of the grid-following converter according to any one of claims 1 to 5.

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