CN109858091B - An electromagnetic transient simulation method and device for a permanent magnet direct drive wind turbine - Google Patents

Abstract

The invention provides an electromagnetic transient simulation method and device for a permanent magnet direct-driven wind turbine, which are used for acquiring operation parameters of a simulated permanent magnet direct-driven wind turbine and simulation parameters of a single machine model; constructing a power amplification model; and carrying out electromagnetic transient simulation on the permanent magnet direct-driven wind turbine based on the power amplification model, wherein simulation parameters comprise main circuit parameters, direct-current bus current parameters and control parameters. The invention can realize large-scale simulation of the permanent magnet direct-driven wind turbine generator, the simulation process occupies little resources, and the simulation precision is high; the steady-state and transient-state active and reactive characteristics of the power amplification model established in the invention are consistent with the steady-state and transient-state active and reactive characteristics of a single machine model, the power of a single permanent magnet direct-drive wind turbine generator set can be amplified by N times through the power amplification model, thousands of MW wind power plant simulation models even larger scale can be built by using few power amplification models, and the requirements of large-scale wind power plant transient analysis tests are met.

Description

An electromagnetic transient simulation method and device for a permanent magnet direct drive wind turbine

technical field

The invention relates to the technical field of electromagnetic simulation, in particular to an electromagnetic transient simulation method and device for a permanent magnet direct drive wind turbine.

Background technique

In order to simulate a large wind farm, it is necessary to establish a corresponding simulation model. However, the structure of the wind power generation system is complex, and the precision of the simulation model will directly determine the accuracy of the simulation results. At present, the modeling and simulation of wind farms is generally a 1:1 detailed value model. At present, the power of a single wind turbine is generally 1.5MW, 2MW or 3MW. If you model according to the actual power of the wind turbine, if you need to build a 100MW simulation model , you need to use fifty or sixty stand-alone models of wind turbines. If you want to build a simulation model of thousands of MW, you need to use thousands of stand-alone models of wind turbines, which exceeds the capacity of the existing computer memory and simulation software memory. Some simulation platforms cannot be realized. Since there are hundreds of wind turbines in the actual operating wind farm, the single-unit model cannot meet the requirements for simulating the entire wind farm. The current general method is to multiply the current at the 35kV grid-connected point, but if this method If the number of multipliers exceeds a certain value, the voltage and current will oscillate, and the machine will trip if the oscillation is severe. The simulation of large-scale wind turbines cannot be realized. To eliminate the oscillation, a filter needs to be added, but it will affect the characteristics of the wind turbine itself. , resulting in the simulation process of wind power augmentation units occupying a huge amount of resources, and the simulation accuracy is low.

Contents of the invention

In order to overcome the shortcomings in the above-mentioned prior art that large-scale simulation cannot be realized, the simulation process takes up huge resources, and the simulation accuracy is low, the present invention provides a method and device for electromagnetic transient simulation of permanent magnet direct drive wind turbines, which can obtain the simulated permanent magnet direct drive The operating parameters of the driving wind turbine and the simulation parameters of the stand-alone model; the power amplification model is constructed based on the simulation parameters of the operating parameters and the stand-alone model; the electromagnetic transient simulation is performed on the permanent magnet direct drive wind turbine based on the power amplification model; the simulation parameters Including main circuit parameters, DC bus current parameters and control parameters, the invention can realize large-scale simulation of permanent magnet direct-drive wind turbines, and the simulation process occupies less resources and has high simulation accuracy.

In order to realize the above-mentioned purpose of the invention, the present invention takes the following technical solutions:

On the one hand, the present invention provides an electromagnetic transient simulation method for a permanent magnet direct drive wind turbine, comprising:

Obtain the operating parameters of the simulated permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model;

Constructing a power amplification model based on the simulation parameters of the operating parameters and the stand-alone model;

Carrying out electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model;

The simulation parameters include main circuit parameters, DC bus current parameters and control parameters.

The construction of the power amplification model includes:

Determine the multiple N of the power amplification model to the stand-alone model according to the number of simulated permanent magnet direct drive wind turbines;

Adjusting the parameters of the stand-alone model to obtain the parameters of the power amplification model;

Wherein, adjusting the parameters of the stand-alone model includes: expanding the parameters of the stand-alone model by N times, reducing them by N times or keeping them unchanged.

The main circuit parameters include permanent magnet direct drive motor parameters, machine-side converter filter parameters, DC bus capacitance parameters and grid-side converter filter parameters;

The parameters of the permanent magnet direct drive motor include stator resistance, positive sequence inductance and negative sequence inductance;

The filter parameters of the machine-side converter and the grid-side converter include a filter capacitor, a filter inductance, and a filter resistor;

The control parameters include current loop control parameters of the machine-side converter controller and current loop control parameters of the grid-side converter controller;

The current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient.

The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including:

When the simulation parameters are parameters of the permanent magnet direct drive motor and filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and filter parameters of the machine-side converter remain unchanged.

The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including:

When the simulation parameter is a DC bus capacitance parameter: expanding the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model.

The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including:

When the simulation parameter is a filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model;

When the simulation parameters are filter resistance and filter inductance: the filter resistance and filter inductance of the stand-alone model are respectively reduced by N times to obtain the filter resistance and filter inductance of the power amplification model.

The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including:

When the simulation parameter is the current loop control parameter of the grid-side converter controller: the current loop control parameter of the grid-side converter controller is reduced by N times to obtain the current loop control of the grid-side converter controller of the power amplification model parameter;

When the simulation parameter is a current loop control parameter of the generator-side converter controller: the current-loop control parameter of the generator-side converter controller remains unchanged.

The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including:

Dividing the stand-alone model from the DC bus into a machine-side part and a grid-side part, connecting the controlled current source to the DC bus of the grid-side part, and using the current of the controlled current source as the grid-side DC bus current;

The grid-side DC bus current is N times larger than the machine-side DC bus current;

The machine-side part includes a permanent magnet direct-drive wind turbine and a machine-side converter, and the grid-side part includes a grid-side converter.

On the other hand, the present invention also provides an electromagnetic transient simulation device for a permanent magnet direct drive wind turbine, including:

The obtaining module is used to obtain the operating parameters of the simulated permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model;

A modeling module, configured to construct a power amplification model based on the operating parameters and the simulation parameters of the stand-alone model;

A simulation module, for performing electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model;

The simulation parameters include main circuit parameters, DC bus current parameters and control parameters.

The modeling modules include:

A determining unit, configured to determine the multiple N of the power amplification model to the stand-alone model according to the number of simulated permanent magnet direct drive wind turbines;

an adjustment unit, configured to adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model;

Wherein, adjusting the parameters of the stand-alone model includes: expanding the parameters of the stand-alone model by N times, reducing them by N times or keeping them unchanged.

The main circuit parameters include permanent magnet direct drive motor parameters, machine-side converter filter parameters, DC bus capacitance parameters and grid-side converter filter parameters;

The parameters of the permanent magnet direct drive motor include stator resistance, positive sequence inductance and negative sequence inductance;

The filter parameters of the machine-side converter and the grid-side converter include a filter capacitor, a filter inductance, and a filter resistor;

The control parameters include current loop control parameters of the machine-side converter controller and current loop control parameters of the grid-side converter controller;

The current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient.

The adjustment unit is specifically used for:

When the simulation parameters are parameters of the permanent magnet direct drive motor and filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and filter parameters of the machine-side converter remain unchanged.

The adjustment unit is specifically used for:

When the simulation parameter is a DC bus capacitance parameter: expanding the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model.

The adjustment unit is specifically used for:

When the simulation parameter is a filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model;

When the simulation parameters are filter resistance and filter inductance: the filter resistance and filter inductance of the stand-alone model are respectively reduced by N times to obtain the filter resistance and filter inductance of the power amplification model.

The adjustment unit is specifically used for:

When the simulation parameter is the current loop control parameter of the grid-side converter controller: the current loop control parameter of the grid-side converter controller is reduced by N times to obtain the current loop control of the grid-side converter controller of the power amplification model parameter;

When the simulation parameter is a current loop control parameter of the generator-side converter controller: the current-loop control parameter of the generator-side converter controller remains unchanged.

The adjustment unit is specifically used for:

Dividing the stand-alone model from the DC bus into a machine-side part and a grid-side part, connecting the controlled current source to the DC bus of the grid-side part, and using the current of the controlled current source as the grid-side DC bus current;

The grid-side DC bus current is N times larger than the machine-side DC bus current;

The machine-side part includes a permanent magnet direct-drive wind turbine and a machine-side converter, and the grid-side part includes a grid-side converter.

Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

In the electromagnetic transient simulation method of the permanent magnet direct drive wind turbine provided by the present invention, the operating parameters of the simulated permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model are obtained; the power amplification is constructed based on the operating parameters and the simulation parameters of the stand-alone model model; based on the power amplification model, electromagnetic transient simulation is performed on the permanent magnet direct drive wind turbine; the simulation parameters include main circuit parameters, DC bus current parameters and control parameters. , the present invention can realize the large-scale simulation of the permanent magnet direct drive wind turbine, the simulation process occupies less resources, and the simulation accuracy is high;

The steady-state and transient active and reactive power characteristics of the power amplification model established in the present invention are consistent with those of the single-machine model, and the power amplification model of a single permanent magnet direct drive wind turbine can be The power is amplified by N times, and a few thousand MW or even larger wind farm simulation models can be built with a few power amplification models to meet the requirements of large-scale wind farm transient analysis tests.

Description of drawings

Fig. 1 is the flowchart of the electromagnetic transient simulation method of the permanent magnet direct drive wind turbine in the embodiment of the present invention;

Fig. 2 is the structural diagram of stand-alone model in the embodiment of the present invention;

3 is a schematic diagram of a grid-side converter controller of a power amplification model in an embodiment of the present invention;

Fig. 4 is a schematic diagram of the machine-side converter controller of the power amplification model in the embodiment of the present invention;

Fig. 5 is a schematic diagram of the DC bus current control of the power amplification model in the embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example 1

Embodiment 1 of the present invention provides an electromagnetic transient simulation method for a permanent magnet direct drive wind turbine, the specific flow chart is shown in Figure 1, and the specific process is as follows:

S101: Obtain the operating parameters of the simulated permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model;

S102: Construct a power amplification model based on the operating parameters and the simulation parameters of the stand-alone model;

S103: Perform electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model;

Simulation parameters include main circuit parameters, DC bus current parameters and control parameters.

The construction of the above power amplification model includes:

Determine the multiple N of the power amplification model to the stand-alone model according to the number of simulated permanent magnet direct drive wind turbines;

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model;

Wherein, adjusting the parameters of the stand-alone model includes: enlarging the parameters of the stand-alone model by N times, reducing them by N times or keeping them unchanged.

The structure diagram of the above stand-alone model is shown in Figure 2. AC is the AC power supply, T is the transformer, WC Controller is the grid-side converter controller, JC Controller is the machine-side converter controller, and L _wcl , R _wcl , and C _wcl are respectively are the filter inductance, filter resistance and filter inductance of the grid-side converter, L _jcl , R _jcl , and C _jcl are the filter inductance, filter resistance and filter inductance of the machine-side converter respectively, C _dc is the DC bus capacitance, and M is Permanent magnet direct drive wind turbine.

Main circuit parameters include permanent magnet direct drive unit parameters, machine-side converter filter parameters, DC bus capacitance parameters and grid-side converter filter parameters;

The parameters of the permanent magnet direct drive unit include stator resistance, positive sequence inductance and negative sequence inductance;

The filter parameters of the machine-side converter and the grid-side converter include filter capacitor, filter inductance and filter resistor;

The control parameters include the current loop control parameters of the machine-side converter controller and the current loop control parameters of the grid-side converter controller;

Current loop control parameters include current loop proportional coefficient and current loop integral coefficient.

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model, including:

When the simulation parameters are the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter remain unchanged.

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model, including:

When the simulation parameter is the DC bus capacitance parameter: expand the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model.

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model, including:

When the simulation parameter is the filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model;

When the simulation parameters are filter resistance and filter inductance: respectively reduce the filter resistance and filter inductance of the stand-alone model by N times to obtain the filter resistance and filter inductance of the power amplification model.

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model, including:

When the simulation parameters are the current loop control parameters of the grid-side converter controller: reduce the current loop control parameters of the grid-side converter controller by N times to obtain the current loop control parameters of the grid-side converter controller of the power amplification model; As shown in Figure 3, in Figure 3, U′ _dc is the DC bus voltage of the power amplification model, U′ _gabc is the power grid voltage of the power amplification model, I′ _wabc is the grid-side converter current of the power amplification model, and K′ _WIp is The power amplification model grid-side converter controller current loop proportional coefficient, K′ _WIi is the power amplification model grid-side converter controller current loop integral coefficient, K _WIp is the stand-alone model grid-side converter controller current loop proportional coefficient, K _WIi is the current loop integral coefficient of the grid-side converter controller of the stand-alone model;

When the simulation parameters are the current loop control parameters of the generator-side converter controller: the current-loop control parameters of the generator-side converter controller remain unchanged, as shown in Figure 4. In Figure 4, _U′dc is the power amplification model DC bus voltage, U′ _jabc is the power grid voltage of the power amplification model, I′ _jabc is the machine-side converter current of the power amplification model, K′ _JIp is the current loop proportional coefficient of the power amplification model machine-side converter controller, and K′ _JIi is The current loop integral coefficient of the machine-side converter controller of the power amplification model, _KJIp is the current loop proportional coefficient of the machine-side converter controller of the single-machine model, and _KJIi is the current-loop integral coefficient of the machine-side converter controller of the single-machine model.

Adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model. Specifically, the stand-alone model is divided into the machine-side part and the grid-side part from the DC bus, and the controlled current source is connected to the DC bus of the grid-side part, and the controlled current source As shown in Figure 5, in Figure 5, I is the DC bus current on the machine side, NI is the DC bus current on the grid side, and the DC bus current on the grid side is enlarged by N times for the DC bus current on the machine side; The machine side part includes the permanent magnet direct drive wind turbine and the machine side converter, and the grid side part includes the grid side converter.

Example 2

Based on the same inventive concept, Embodiment 2 of the present invention also provides an electromagnetic transient simulation device for permanent magnet direct drive wind turbines, including an acquisition module, a modeling module and a simulation module. The functions of the above modules will be described in detail below :

The obtaining module is used to obtain the operating parameters of the simulated permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model;

A modeling module is used to build a power amplification model based on the operating parameters and the simulation parameters of the stand-alone model;

The simulation module is used to perform electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model;

Simulation parameters include main circuit parameters, DC bus current parameters and control parameters.

Modeling modules include:

A determination unit is used to determine the multiple N of the power amplification model to the stand-alone model according to the number of simulated permanent magnet direct drive wind turbines;

The adjustment unit is used to adjust the parameters of the stand-alone model to obtain the parameters of the power amplification model;

Wherein, adjusting the parameters of the stand-alone model includes: enlarging the parameters of the stand-alone model by N times, reducing them by N times or keeping them unchanged.

Main circuit parameters include permanent magnet direct drive motor parameters, machine-side converter filter parameters, DC bus capacitor parameters and grid-side converter filter parameters;

Permanent magnet direct drive motor parameters include stator resistance, positive sequence inductance and negative sequence inductance;

The filter parameters of the machine-side converter and the grid-side converter include filter capacitor, filter inductance and filter resistor;

The control parameters include the current loop control parameters of the machine-side converter controller and the current loop control parameters of the grid-side converter controller;

Current loop control parameters include current loop proportional coefficient and current loop integral coefficient.

The adjustment unit adjusts the parameters of the stand-alone model to obtain the parameters of the power amplification model, as follows:

When the simulation parameters are the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter remain unchanged.

The adjustment unit adjusts the parameters of the stand-alone model to obtain the parameters of the power amplification model, as follows:

When the simulation parameter is the DC bus capacitance parameter: expand the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model.

The adjustment unit adjusts the parameters of the stand-alone model to obtain the parameters of the power amplification model, as follows:

When the simulation parameter is the filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model;

When the simulation parameters are filter resistance and filter inductance: respectively reduce the filter resistance and filter inductance of the stand-alone model by N times to obtain the filter resistance and filter inductance of the power amplification model.

The adjustment unit adjusts the parameters of the stand-alone model to obtain the parameters of the power amplification model, as follows:

When the simulation parameters are the current loop control parameters of the grid-side converter controller: reduce the current loop control parameters of the grid-side converter controller by N times to obtain the current loop control parameters of the grid-side converter controller of the power amplification model;

When the simulation parameters are the current loop control parameters of the generator-side converter controller: the current-loop control parameters of the generator-side converter controller remain unchanged.

The adjustment unit divides the stand-alone model from the DC bus into the machine-side part and the grid-side part, connects the controlled current source to the DC bus of the grid-side part, and uses the current of the controlled current source as the grid-side DC bus current;

The grid-side DC bus current is N times larger than the machine-side DC bus current;

The machine side part includes the permanent magnet direct drive wind turbine and the machine side converter, and the grid side part includes the grid side converter.

For the convenience of description, each part of the device described above is divided into various modules or units by function and described separately. Of course, when implementing the present application, the functions of each module or unit can be implemented in one or more pieces of software or hardware.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Those of ordinary skill in the art can still modify or equivalently replace the specific implementation methods of the present invention with reference to the above embodiments. Any modifications or equivalent replacements departing from the spirit and scope of the present invention are within the protection scope of the claims of the pending application of the present invention.

Claims (2)

1. An electromagnetic transient simulation method of a permanent magnet direct drive wind turbine, characterized in that it comprises: Obtain the operating parameters of the permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model; Constructing a power amplification model based on the simulation parameters of the operating parameters and the stand-alone model; Carrying out electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model; The simulation parameters include main circuit parameters, DC bus current parameters and control parameters; The construction of the power amplification model includes: Determine the multiple N of the power amplification model to the stand-alone model according to the number of permanent magnet direct drive wind turbines; Adjusting the simulation parameters of the stand-alone model to obtain power amplification model parameters; Wherein, adjusting the simulation parameters of the stand-alone model includes: Expanding the simulation parameters of the stand-alone model by N times, shrinking by N times or keeping it unchanged; The main circuit parameters include permanent magnet direct drive motor parameters, machine-side converter filter parameters, DC bus capacitance parameters and grid-side converter filter parameters; The parameters of the permanent magnet direct drive motor include stator resistance, positive sequence inductance and negative sequence inductance; The filter parameters of the machine-side converter and the grid-side converter include a filter capacitor, a filter inductance, and a filter resistor; The control parameters include current loop control parameters of the machine-side converter controller and current loop control parameters of the grid-side converter controller; The current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient; The adjustment of the simulation parameters of the stand-alone model to obtain the parameters of the power amplification model includes: When the simulation parameters are the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter remain unchanged, and the permanent magnet direct drive model of the power amplification model is obtained. drive motor parameters and machine-side converter filter parameters; The parameters of the stand-alone model are adjusted to obtain the parameters of the power amplification model, including: When the simulation parameter is a DC bus capacitance parameter: expanding the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model; The adjustment of the simulation parameters of the stand-alone model to obtain the parameters of the power amplification model includes: When the simulation parameter is a filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model; When the simulation parameters are filter resistance and filter inductance: the filter resistance and filter inductance of the stand-alone model are respectively reduced by N times to obtain the filter resistance and filter inductance of the power amplification model; The adjustment of the simulation parameters of the stand-alone model to obtain the parameters of the power amplification model includes: When the simulation parameter is the current loop control parameter of the grid-side converter controller: the current loop control parameter of the grid-side converter controller is reduced by N times to obtain the current loop control of the grid-side converter controller of the power amplification model parameter; When the simulation parameter is the current loop control parameter of the machine-side converter controller: the current loop control parameter of the machine-side converter controller remains unchanged, and the current loop of the machine-side converter controller of the power amplification model is obtained Control parameters; The adjustment of the simulation parameters of the stand-alone model to obtain the parameters of the power amplification model includes: Dividing the stand-alone model from the DC bus into a machine-side part and a grid-side part, connecting the controlled current source to the DC bus of the grid-side part, and using the current of the controlled current source as the grid-side DC bus current; The grid-side DC bus current is N times larger than the machine-side DC bus current; The machine-side part includes a permanent magnet direct-drive wind turbine and a machine-side converter, and the grid-side part includes a grid-side converter. 2. An electromagnetic transient simulation device of a permanent magnet direct drive wind turbine, characterized in that it comprises: The obtaining module is used to obtain the operating parameters of the permanent magnet direct drive wind turbine and the simulation parameters of the stand-alone model; A modeling module, configured to construct a power amplification model based on the operating parameters and the simulation parameters of the stand-alone model; A simulation module, for performing electromagnetic transient simulation on the permanent magnet direct drive wind turbine based on the power amplification model; The simulation parameters include main circuit parameters, DC bus current parameters and control parameters; The modeling modules include: A determination unit is used to determine the multiple N of the power amplification model to the single machine model according to the number of permanent magnet direct drive wind turbines; An adjustment unit, configured to adjust the simulation parameters of the stand-alone model to obtain power amplification model parameters; Wherein, adjusting the simulation parameters of the stand-alone model includes: expanding the parameters of the stand-alone model by N times, reducing them by N times or keeping them unchanged; The main circuit parameters include permanent magnet direct drive motor parameters, machine-side converter filter parameters, DC bus capacitance parameters and grid-side converter filter parameters; The parameters of the permanent magnet direct drive motor include stator resistance, positive sequence inductance and negative sequence inductance; The filter parameters of the machine-side converter and the grid-side converter include a filter capacitor, a filter inductance, and a filter resistor; The control parameters include current loop control parameters of the machine-side converter controller and current loop control parameters of the grid-side converter controller; The current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient; The adjustment unit is specifically used for: When the simulation parameters are the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter: the parameters of the permanent magnet direct drive motor and the filter parameters of the machine-side converter remain unchanged, and the permanent magnet direct drive model of the power amplification model is obtained. drive motor parameters and machine-side converter filter parameters; The adjustment unit is specifically used for: When the simulation parameter is a DC bus capacitance parameter: expanding the DC bus capacitance parameter of the stand-alone model by N times to obtain the DC bus capacitance parameter of the power amplification model; The adjustment unit is specifically used for: When the simulation parameter is a filter capacitor: expand the filter capacitor of the stand-alone model by N times to obtain the filter capacitor of the power amplification model; When the simulation parameters are filter resistance and filter inductance: the filter resistance and filter inductance of the stand-alone model are respectively reduced by N times to obtain the filter resistance and filter inductance of the power amplification model; The adjustment unit is specifically used for: When the simulation parameter is the current loop control parameter of the grid-side converter controller: the current loop control parameter of the grid-side converter controller is reduced by N times to obtain the current loop control of the grid-side converter controller of the power amplification model parameter; When the simulation parameter is the current loop control parameter of the machine-side converter controller: the current loop control parameter of the machine-side converter controller remains unchanged, and the current loop of the machine-side converter controller of the power amplification model is obtained Control parameters; The adjustment unit is specifically used for: Dividing the stand-alone model from the DC bus into a machine-side part and a grid-side part, connecting the controlled current source to the DC bus of the grid-side part, and using the current of the controlled current source as the grid-side DC bus current; The grid-side DC bus current is N times larger than the machine-side DC bus current; The machine-side part includes a permanent magnet direct-drive wind turbine and a machine-side converter, and the grid-side part includes a grid-side converter.

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