A method for constructing a damping controllable voltage configuration of a network-forming converter

Abstract

The application discloses a damping controllable voltage construction method of a network-constructed converter. The method comprises the following steps: acquiring a grid-connected converter output voltage, a grid voltage amplitude, a line reactance and a reactive power error signal; determining a proportional coefficient and a differential coefficient of the reactive power error according to the grid-connected converter output voltage, the grid voltage amplitude and the line reactance; performing proportional-differential control on the reactive power error signal according to the proportional coefficient and the differential coefficient of the reactive power error, so as to generate a reactive power regulating signal; and determining a voltage reference amplitude of network construction control according to a second-order critical damping tracking equation of the reactive power regulating signal and the grid-connected converter voltage amplitude. The method can guarantee accurate reactive power tracking performance, has voltage damping control capability, can effectively inhibit voltage oscillation, improve dynamic response speed and reduce overshoot, enhances the stability and robustness of the system, and improves the reactive power regulating capability.

Description

Technical Field

[0001] The present invention relates to the technical field of converter control, and in particular to a damping controllable voltage construction method and device for a grid-type converter. Background Art

[0002] Inverter grid-connection technology is an effective means of achieving reliable grid integration and stable consumption of renewable energy. Grid-connected control enables power dispatch and provides stable voltage and frequency support. Its control objectives include: grid synchronization, power sharing during parallel operation, maintaining load power supply after disconnection from the grid, and ensuring fault ride-through and voltage recovery. Currently, droop control, virtual synchronous machine control, and virtual oscillator control are widely used control methods to address power tracking and voltage and frequency stability. Reactive power-voltage control is one of the core technologies for achieving voltage configuration in grid-connected converters. Its basic principle is to stabilize voltage by adjusting reactive power output during grid disturbances. When the grid voltage decreases, reactive power output is increased; when the grid voltage increases, reactive power output is reduced, thereby achieving voltage stability. Traditional reactive power-voltage control often uses the droop control principle, using a proportional-integral (PI) controller to adjust reactive power output to stabilize voltage. However, traditional PI control strategies cannot effectively adjust system damping, and their robustness against intermittent fluctuations in renewable energy or grid-side disturbances is insufficient. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a damping controllable voltage construction method and device for a grid-type converter.

[0004] In a first aspect, an embodiment of the present invention provides a damping controllable voltage construction method for a grid-type converter, comprising:

[0005] Obtain grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signals;

[0006] Determining a proportional coefficient and a differential coefficient of a reactive power error based on the output voltage of the grid-connected converter, the grid voltage amplitude, and the line reactance;

[0007] Performing proportional and differential control on the reactive power error signal according to the proportional coefficient and differential coefficient of the reactive power error to generate a reactive power regulation signal;

[0008] The voltage reference amplitude for grid control is determined according to the reactive power regulation signal and the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter.

[0009] Furthermore, the expressions of the proportional coefficient and differential coefficient of the reactive power error are:

[0010]

[0011] Where X is the line reactance, c1 and c2 are positive real numbers, V is the output voltage amplitude of the grid-connected converter, E is the grid voltage amplitude, k p is the proportional coefficient of reactive power error, k d is the differential coefficient of reactive power error.

[0012] Furthermore, the obtaining of the grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signal comprises the following steps:

[0013] Obtain grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power reference instructions;

[0014] Determining instantaneous reactive power based on the grid-connected converter output voltage, grid voltage amplitude, and line reactance;

[0015] A reactive power error signal is generated according to the reactive power reference instruction and the instantaneous reactive power.

[0016] Furthermore, the expression of the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter is:

[0017]

[0018] in, is the first-order derivative of the grid-connected converter output voltage amplitude, is the second-order derivative of the output voltage amplitude of the grid-connected converter, V * is the voltage reference amplitude, and ζ is the damping adjustment coefficient.

[0019] Furthermore, the method further comprises the following steps:

[0020] Establishing a Lyapunov function according to the first differential expression and the second differential expression of the reactive power error signal, and determining the first differential expression of the Lyapunov function;

[0021] According to the first differential expression, second differential expression, first differential expression of Lyapunov function and reactive voltage control equation of the reactive power error signal, the proportional coefficient of reactive power error, line impedance, relationship between grid-connected converter output voltage and grid voltage amplitude, and relationship between the differential coefficient of reactive power error, line impedance, grid-connected converter output voltage and grid voltage amplitude are determined.

[0022] Furthermore, the reactive voltage control equation is expressed as:

[0023]

[0024] in, is the reactive power reference instruction, Q s is the instantaneous reactive power.

[0025] Furthermore, the method further comprises the following steps:

[0026] The feasible domain of the proportional coefficient and the differential coefficient of the reactive power error is determined according to the relationship between the reactive power error and the output voltage of the grid-connected converter when the proportional coefficient and the differential coefficient of the reactive power error vary.

[0027] In a second aspect, the present invention further provides a damping controllable voltage construction device for a grid-type converter, comprising: a parameter acquisition module, a control parameter adjustment module, a signal generation module, and a signal tracking module; wherein:

[0028] Parameter acquisition module, used to obtain the grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signal;

[0029] A control parameter adjustment module, configured to determine a proportional coefficient and a differential coefficient of a reactive power error according to the output voltage of the grid-connected converter, the grid voltage amplitude, and the line reactance;

[0030] A signal generating module, configured to perform proportional and differential control on a reactive power error signal according to a proportional coefficient and a differential coefficient of the reactive power error to generate a reactive power regulation signal;

[0031] The signal tracking module is used to determine the voltage reference amplitude of the grid control according to the reactive power regulation signal and the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter.

[0032] In a third aspect, the present invention also provides an electronic device comprising: a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the damping controllable voltage construction method of the grid-type converter as described above is implemented.

[0033] In a fourth aspect, the present invention further provides a computer storage medium storing computer executable instructions, which, when executed, implement the damping controllable voltage construction method of the grid-type converter as described above.

[0034] The beneficial effects of the technical solution provided by the present invention include at least: obtaining the grid-connected converter output voltage, grid voltage amplitude, line reactance, and reactive power error signal; determining the proportional coefficient and differential coefficient of the reactive power error based on the grid-connected converter output voltage, grid voltage amplitude, and line reactance; performing proportional differential control on the reactive power error signal based on the proportional coefficient and differential coefficient of the reactive power error to generate a reactive regulation signal; and determining the voltage reference amplitude for network control based on the second-order critical damping tracking equation of the reactive regulation signal and voltage amplitude. This system can provide voltage damping control capability while ensuring precise reactive power tracking performance, effectively suppress voltage oscillations, improve dynamic response speed, reduce overshoot, enhance system stability and robustness, and improve reactive power regulation capability. By adjusting the proportional differential coefficient and damping adjustment coefficient, the voltage amplitude response speed is accelerated and reactive overshoot is effectively reduced. Furthermore, the proportional differential coefficient and damping adjustment coefficient are adjustable over a wide range, enabling simple controller design. In addition, it has a certain degree of robustness under DC side voltage disturbances, which can effectively improve the voltage support capability of intermittent and fluctuating new energy sources.

[0035] Other features and advantages of the present invention will be described in the following description or understood through implementation of the present invention. The purpose and other advantages of the present invention can be realized and obtained through the structures particularly pointed out in the written description, claims, and drawings.

[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 Flowchart of a damping controllable voltage construction method for a grid-type converter according to an embodiment of the present invention;

[0039] Figure 2 A control principle diagram of a damping controllable voltage construction method for a grid-type converter according to an embodiment of the present invention;

[0040] FIG3( a ) is a diagram showing the reactive power PD adjustment parameter k in an embodiment of the present invention. p The relationship between e and output voltage under changes;

[0041] FIG3( b ) shows the reactive power PD adjustment parameter k in an embodiment of the present invention. d The relationship between e and output voltage under changes;

[0042] Figure 41 is a transient response comparison waveform diagram of the damped controllable voltage construction method and the PI method of the grid-type converter in an embodiment of the present invention;

[0043] Figure 5 FIG. 4 is a schematic structural diagram of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0045] my country has proposed building a new power system dominated by renewable energy. As the power system evolves toward cleaner and more intelligent power generation, the scale of renewable energy units connected to the grid continues to grow, gradually replacing traditional thermal power units. This large-scale replacement of conventional synchronous generators by renewable energy has resulted in insufficient voltage support for the main grid. In the event of a fault, high transient overvoltage levels can cause wind turbines to disconnect from the grid and force DC transmission systems to operate at reduced capacity. Large-scale DC feed-in to the receiving grid has led to a continuous reduction in the operating capacity of local conventional thermal power units, resulting in a decrease in the transient voltage support capacity of the receiving grid and a significant increase in transient voltage stability issues.

[0046] Inverter grid-connection technology is an effective means of achieving reliable grid integration and stable consumption of renewable energy. Grid-connected control enables power dispatch and provides stable voltage and frequency support. Its control objectives are: grid synchronization, power balancing during parallel operation, maintaining load power supply after disconnection from the grid, and ensuring fault ride-through and voltage recovery. Currently, droop control, virtual synchronous machine control, and virtual oscillator control are widely used control methods to address power tracking and voltage and frequency stability. Reactive power-voltage control is one of the core technologies for achieving voltage configuration in grid-connected converters. Its basic principle is to stabilize voltage by adjusting reactive power output during grid disturbances. When the grid voltage decreases, reactive power output is increased; when the grid voltage increases, reactive power output is reduced, thereby achieving voltage stability. Traditional reactive power-voltage control often uses the droop control principle, using a proportional-integral (PI) controller to adjust reactive power output to stabilize voltage. However, the traditional PI control strategy cannot effectively adjust the system damping, and its anti-disturbance performance is insufficient under the intermittent volatility of renewable energy or grid-side disturbances. In this context, taking into account both fast reactive power tracking and voltage damping regulation is the key control goal to improve the voltage stability of renewable energy grid converters.

[0047] The large-scale integration of renewable energy and the subsequent commissioning of ultra-high voltage direct current (UHVDC) transmission projects have profoundly changed the operational characteristics of power grids, with transient voltage issues becoming particularly prominent. Virtual synchronous generators (VMSs) employ reactive power-voltage control to simulate the excitation regulation of traditional synchronous generators, achieving reactive power and voltage droop characteristics. However, they lack damping regulation capabilities, making it difficult to maintain precise voltage and reactive power setpoints during grid voltage fluctuations and load changes, resulting in suboptimal transient system performance. Furthermore, in situations such as grid faults or sudden load changes, especially large disturbances, the nonlinear effects of the system become more pronounced. Traditional linear damping control methods struggle to effectively address these nonlinear dynamic characteristics, potentially leading to excessive oscillation or instability. Traditional PI-based reactive power-voltage control is highly sensitive to line impedance and short-circuit conditions. Parameter variations or uncertainties can significantly degrade control performance and even cause system instability.

[0048] Effective damping regulation can enhance the grid's adaptability to large-scale renewable energy integration, mitigate the voltage fluctuations and instability associated with this integration, and promote its integration and utilization. Current grid construction techniques focus on damping regulation in the active power-frequency link, adjusting damping by increasing the first-order frequency coefficient while neglecting the damping control capabilities of the reactive power-voltage link. Furthermore, system dynamic response is the speed at which the voltage recovers from a disturbance. Excessive damping can result in a slow system response, while insufficient damping can lead to excessive system oscillations. Therefore, damping regulation requires a balance between response speed and oscillation suppression. Appropriate damping regulation ensures that the system smoothly returns to steady state in the shortest possible time.

[0049] Currently, there is no grid reactive power-voltage loop control strategy that takes into account both accurate reactive power tracking and controllable voltage damping.

[0050] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a damping controllable voltage construction method and device for a grid-type converter.

[0051] The embodiment of the present invention provides a damping controllable voltage construction method for a grid-type converter, the process of which is as follows: Figure 1 As shown in the control principle diagram Figure 2 As shown, the following steps are included:

[0052] Step S1: Obtain the grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signal.

[0053] Step S2: determining a proportional coefficient and a differential coefficient of a reactive power error according to the grid-connected converter output voltage, the grid voltage amplitude, and the line reactance.

[0054] Step S3: performing proportional differential control on the reactive power error signal according to the proportional coefficient and differential coefficient of the reactive power error to generate a reactive power regulation signal.

[0055] Step S4: determining a voltage reference amplitude for grid control according to the reactive power regulation signal and a second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter.

[0056] In the above method of this embodiment, the expressions of the proportional coefficient and differential coefficient of the reactive power error are:

[0057]

[0058] Where X is the line reactance, c1 and c2 are positive real numbers, V is the output voltage amplitude of the grid-connected converter, E is the grid voltage amplitude, k p is the proportional coefficient of reactive power error, k d is the differential coefficient of reactive power error.

[0059] In the above method of this embodiment, the step of obtaining the grid-connected converter output voltage, grid voltage amplitude, line reactance, and reactive power error signal comprises the following steps:

[0060] Obtain grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power reference instructions;

[0061] Determining instantaneous reactive power based on the grid-connected converter output voltage, grid voltage amplitude, and line reactance;

[0062] A reactive power error signal is generated according to the reactive power reference instruction and the instantaneous reactive power.

[0063] In the above method of this embodiment, the expression of the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter is:

[0064]

[0065] in, is the first-order derivative of the grid-connected converter output voltage amplitude, is the second-order derivative of the output voltage amplitude of the grid-connected converter, V * is the voltage reference amplitude, and ζ is the damping adjustment coefficient.

[0066] Through Laplace transform, the transfer function of the system is obtained as:

[0067]

[0068] It can be seen that this system is a second-order system with a natural angular frequency of 0.5ζ, a damping coefficient of 1, and a low-frequency gain of 0dB, which allows it to stably track the reference input signal. The larger the ζ, the greater the system damping, and the slower the voltage tracking convergence speed.

[0069] In the above method of this embodiment, the expression of the reactive voltage control equation is:

[0070]

[0071] in, is the reactive power reference instruction, Q s is the instantaneous reactive power.

[0072] The above method of this embodiment further includes the following steps:

[0073] Establishing a Lyapunov function according to the first differential expression and the second differential expression of the reactive power error signal, and determining the first differential expression of the Lyapunov function;

[0074] According to the first differential expression, second differential expression, first differential expression of Lyapunov function and reactive voltage control equation of the reactive power error signal, the proportional coefficient of reactive power error, line impedance, relationship between grid-connected converter output voltage and grid voltage amplitude, and relationship between the differential coefficient of reactive power error, line impedance, grid-connected converter output voltage and grid voltage amplitude are determined.

[0075] For a purely inductive line, the reactance is X, and the expression for instantaneous reactive power is:

[0076]

[0077] Take the reactive power error signal Assuming that the grid voltage and line reactance are constants, their first and second differential expressions are:

[0078]

[0079] Establish the Lyapunov function as Its first differential expression is Substituting the two equations into the reactive voltage control equation, we get:

[0080]

[0081] If guaranteed If the negative rule is true, the system is stable, then e and Need to be negative. So k p and k d The design formula is:

[0082]

[0083] Where c1 and c2 are positive real numbers, ensuring that the reactive power has a certain damping adjustment capability.

[0084] The above method of this embodiment further includes the following steps:

[0085] The feasible domain of the proportional coefficient and the differential coefficient of the reactive power error is determined according to the relationship between the reactive power error and the output voltage when the proportional coefficient and the differential coefficient of the reactive power error change.

[0086] As shown in Figure 3(a), the reactive power PD adjustment parameter k p The relationship between e and output voltage under changing conditions is shown in Figure 3(b), which shows the reactive power PD adjustment parameter k d The relationship between e and output voltage under changing conditions. p When the reactive voltage loop is greater than 0.5, it ensures that the output voltage is tracked and the reactive power deviation is 0. p When k is 1, d <1.85, the reactive power deviation is kept at 0. Based on the above formula, it can be deduced that the design k p and k d feasible domain.

[0087] Preferably, the average power value of the instantaneous reactive power is calculated by a first-order low-pass filter link, and the cut-off frequency of the low-pass filter is ω c The relationship between it and the designed damping adjustment coefficient is:

[0088] ω c >0.5ζ.

[0089] like Figure 4 As shown in the figure, in the grid-connected mode, a reactive power command of 1 pu is applied after 15 seconds. This scheme can quickly and accurately track the reactive power command. Compared with the traditional PI controller, it effectively reduces the overshoot while ensuring rapid reactive power regulation, reduces the output voltage fluctuation of the grid, and can adjust the voltage damping according to the grid demand.

[0090] In the above method of this embodiment, the output voltage of the grid-connected converter, the grid voltage amplitude, the line reactance, and the reactive power error signal are obtained; a proportional coefficient and a differential coefficient of the reactive power error are determined based on the grid-connected converter output voltage, the grid voltage amplitude, and the line reactance; proportional and differential control is performed on the reactive power error signal based on the proportional and differential coefficients of the reactive power error to generate a reactive regulation signal; and a voltage reference amplitude for network control is determined based on a second-order critical damping tracking equation for the reactive regulation signal and the voltage amplitude. This method can provide voltage damping control capability while ensuring precise reactive power tracking performance, effectively suppress voltage oscillations, improve dynamic response speed, reduce overshoot, enhance system stability and robustness, and improve reactive power regulation capability. By adjusting the proportional and differential coefficients and the damping adjustment coefficients, the voltage amplitude response speed is accelerated and the reactive overshoot is effectively reduced. The proportional and differential coefficients and the damping adjustment coefficients are adjustable over a wide range, achieving a simple controller design. In addition, the method has a certain degree of robustness under DC side voltage disturbances, effectively improving the voltage support capability of intermittent and fluctuating renewable energy sources.

[0091] Those skilled in the art can change the above sequence without departing from the scope of protection of the present disclosure.

[0092] Another embodiment of the present invention provides a damping controllable voltage configuration device for a grid-type converter, comprising: a parameter acquisition module, a control parameter adjustment module, a signal generation module, and a signal tracking module, wherein:

[0093] Parameter acquisition module, used to obtain the grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signal;

[0094] A control parameter adjustment module, configured to determine a proportional coefficient and a differential coefficient of a reactive power error according to the output voltage of the grid-connected converter, the grid voltage amplitude, and the line reactance;

[0095] A signal generating module, configured to perform proportional and differential control on a reactive power error signal according to a proportional coefficient and a differential coefficient of the reactive power error to generate a reactive power regulation signal;

[0096] The signal tracking module is used to determine the voltage reference amplitude of the grid control according to the reactive power regulation signal and the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter.

[0097] Regarding the system in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0098] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, the structure of which is as follows: Figure 5As shown, it includes: a memory, a processor and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the damping controllable voltage construction method of the grid-type converter is implemented.

[0099] Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, the damping controllable voltage construction method of the aforementioned grid-type converter is implemented.

[0100] Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention shall still fall within the scope of the patent coverage of the present invention.

[0101] Unless otherwise stated, the term "connected" refers to a logical relationship for current transmission and does not necessarily indicate a direct electrical connection. Furthermore, the terms "first," "second," etc. do not indicate a sequential order but are merely used to identify related units, devices, etc.

[0102] The present invention is not limited to the above voltage levels, which are merely voltage levels in the embodiment.

Claims

1. A damping controllable voltage construction method for a grid-type converter, characterized in that: The following steps are involved: Obtain grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signals; Determining a proportional coefficient and a differential coefficient of a reactive power error based on the output voltage of the grid-connected converter, the grid voltage amplitude, and the line reactance; Performing proportional and differential control on the reactive power error signal according to the proportional coefficient and differential coefficient of the reactive power error to generate a reactive power regulation signal; The voltage reference amplitude for grid control is determined according to the reactive power regulation signal and the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter, wherein the expression of the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter is: ， in, is the first-order derivative of the grid-connected converter output voltage amplitude, is the second-order derivative of the grid-connected converter output voltage amplitude, is the voltage reference amplitude, is the damping adjustment coefficient; Determining a proportional coefficient and a differential coefficient of a reactive power error according to the grid-connected converter output voltage, the grid voltage amplitude, and the line reactance includes: Establishing a Lyapunov function according to the first differential expression and the second differential expression of the reactive power error signal, and determining the first differential expression of the Lyapunov function; Determining a proportional coefficient of the reactive power error and a differential coefficient of the reactive power error based on a first differential expression, a second differential expression, a first differential expression of a Lyapunov function, a reactive voltage control equation, an output voltage of the grid-connected converter, a grid voltage amplitude, and a line reactance of the reactive power error signal; The method of obtaining the grid-connected converter output voltage, grid voltage amplitude, line reactance, and reactive power error signal comprises the following steps: Obtain grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power reference instructions; Determining instantaneous reactive power based on the grid-connected converter output voltage, grid voltage amplitude, and line reactance; A reactive power error signal is generated according to the reactive power reference instruction and the instantaneous reactive power.

2. The method according to claim 1, wherein The expressions of the proportional coefficient and differential coefficient of the reactive power error are: ， in, X is the line reactance, and is a positive real number, is the output voltage amplitude of the grid-connected converter, is the grid voltage amplitude, k p is the proportional coefficient of reactive power error, k d is the differential coefficient of reactive power error.

3. The method according to claim 1, wherein The expression of the reactive voltage control equation is: ， in, is the reactive power reference instruction, and Qs is the instantaneous reactive power.

4. The method according to claim 3, wherein The following steps are also included: The feasible domain of the proportional coefficient and the differential coefficient of the reactive power error is determined according to the relationship between the reactive power error and the output voltage of the grid-connected converter when the proportional coefficient and the differential coefficient of the reactive power error vary.

5. A damping controllable voltage construction device for a grid-type converter, characterized in that: The method for implementing claim 1 comprises: a parameter acquisition module, a control parameter adjustment module, a signal generation module and a signal tracking module; wherein: Parameter acquisition module, used to obtain the grid-connected converter output voltage, grid voltage amplitude, line reactance and reactive power error signal; A control parameter adjustment module, configured to determine a proportional coefficient and a differential coefficient of a reactive power error according to the output voltage of the grid-connected converter, the grid voltage amplitude, and the line reactance; A signal generating module, configured to perform proportional and differential control on a reactive power error signal according to a proportional coefficient and a differential coefficient of the reactive power error to generate a reactive power regulation signal; The signal tracking module is used to determine the voltage reference amplitude of the grid control according to the reactive power regulation signal and the second-order critical damping tracking equation of the output voltage amplitude of the grid-connected converter.

6. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the damping controllable voltage construction method of the grid-type converter according to any one of claims 1 to 4 is implemented.

7. A computer storage medium, characterized in that The computer storage medium stores computer executable instructions, which, when executed, implement the damping controllable voltage construction method of the grid-type converter according to any one of claims 1 to 4.

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