CN109858091B - Electromagnetic transient simulation method and device for permanent magnet direct-driven wind turbine generator - Google Patents
Electromagnetic transient simulation method and device for permanent magnet direct-driven wind turbine generator Download PDFInfo
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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
Technical Field
The invention relates to the technical field of electromagnetic simulation, in particular to a method and a device for electromagnetic transient simulation of a permanent magnet direct-driven wind turbine generator.
Background
In order to simulate a large wind farm, a corresponding simulation model needs to be established. However, the wind power generation system has a complex structure, and the accuracy of the simulation result is directly determined by the fineness of the simulation model. The current wind farm modeling simulation is generally a 1:1 detailed value model, the current power of a single wind turbine is generally 1.5MW, 2MW or 3MW, if the wind turbine is modeled according to the actual power of the wind turbine, if a 100MW simulation model needs to be built, a single model of five sixty wind turbines is needed, if thousands MW simulation models need to be built, a single model of thousands of wind turbines is needed, and the capacity of the memory of the existing computer and the capacity of the simulation software are exceeded, and the existing simulation platform cannot be realized. Because hundreds of wind turbines are arranged in the actually operated wind power plant, the whole wind power plant is simulated, a single machine model cannot meet the requirement, the current multiplication is carried out on a 35kV grid-connected point by a common method at present, but if the multiplier quantity exceeds a certain value, the voltage and the current can oscillate, the oscillation can seriously jump, the simulation of the large-scale wind turbines is not realized, if the oscillation is eliminated, a filter is needed to be added, the characteristics of the wind turbines are influenced, the simulation process of the wind turbine is huge in occupied resources, and the simulation precision is low.
Disclosure of Invention
In order to overcome the defects that large-scale simulation cannot be realized, the occupied resources in the simulation process are huge and the simulation precision is low in the prior art, the invention provides an electromagnetic transient simulation method and device for a permanent magnet direct-driven wind turbine, and operation parameters of the simulated permanent magnet direct-driven wind turbine and simulation parameters of a single machine model are obtained; constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model; performing electromagnetic transient simulation on the permanent magnet direct-driven wind turbine based on the power amplification model; the simulation parameters comprise the main circuit parameters, the direct current bus current parameters and the control parameters, the invention can realize large-scale simulation of the permanent magnet direct drive wind turbine generator, the occupied resources in the simulation process are small, and the simulation precision is high.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in one aspect, the invention provides an electromagnetic transient simulation method of a permanent magnet direct-driven wind turbine, which comprises the following steps:
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 based on the operation parameters and simulation parameters of the single machine model;
performing electromagnetic transient simulation on the permanent magnet direct-driven wind turbine based on the power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters.
The construction of the power amplification model comprises the following steps:
determining the multiple N of a power amplification model to the single machine model according to the number of the simulated permanent magnet direct-driven wind turbines;
adjusting the parameters of the single machine model to obtain power amplification model parameters;
wherein the adjusting of the parameters of the stand-alone model includes: and expanding the parameters of the single machine model by N times, shrinking the parameters by N times or keeping the parameters unchanged.
The main circuit parameters comprise permanent magnet direct drive motor parameters, machine side converter filtering parameters, direct current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive motor parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient.
The step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are permanent magnet direct drive motor parameters and machine side converter filtering parameters: the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter are kept unchanged.
The step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is a DC bus capacitance parameter: and expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model.
The step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is a filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are a filter resistor and a filter inductance: and respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model.
The step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are current loop control parameters of the grid-side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model;
when the simulation parameters are current loop control parameters of the machine side variable current controller: the current loop control parameters of the machine side variable current controller remain unchanged.
The step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
dividing the single machine model into a machine side part and a network side part from a direct current bus, connecting a controlled current source to the direct current bus of the network side part, and taking the current of the controlled current source as the current of the network side direct current bus;
the current of the net side direct current bus is N times of that of the machine side direct current bus;
the machine side part comprises a permanent magnet direct-driven wind turbine generator and a machine side converter, and the grid side part comprises a grid side converter.
On the other hand, the invention also provides an electromagnetic transient simulation device of the permanent magnet direct-driven wind turbine generator, which comprises:
the acquisition module is used for acquiring the operation parameters of the simulated permanent magnet direct-driven wind turbine generator and the simulation parameters of the single machine model;
the modeling module is used for constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model;
the simulation module is used for carrying out electromagnetic transient simulation on the permanent magnet direct-driven wind turbine generator based on the power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters.
The modeling module includes:
the determining unit is used for determining the multiple N of the power amplification model to the single machine model according to the number of the simulated permanent magnet direct-driven wind turbines;
the adjusting unit is used for adjusting the parameters of the single machine model to obtain the parameters of the power amplification model;
wherein the adjusting of the parameters of the stand-alone model includes: and expanding the parameters of the single machine model by N times, shrinking the parameters by N times or keeping the parameters unchanged.
The main circuit parameters comprise permanent magnet direct drive motor parameters, machine side converter filtering parameters, direct current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive motor parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters include a current loop proportional coefficient and a current loop integral coefficient.
The adjusting unit is specifically configured to:
when the simulation parameters are permanent magnet direct drive motor parameters and machine side converter filtering parameters: the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter are kept unchanged.
The adjusting unit is specifically configured to:
when the simulation parameter is a DC bus capacitance parameter: and expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model.
The adjusting unit is specifically configured to:
when the simulation parameter is a filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are a filter resistor and a filter inductance: and respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model.
The adjusting unit is specifically configured to:
when the simulation parameters are current loop control parameters of the grid-side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model;
when the simulation parameters are current loop control parameters of the machine side variable current controller: the current loop control parameters of the machine side variable current controller remain unchanged.
The adjusting unit is specifically configured to:
dividing the single machine model into a machine side part and a network side part from a direct current bus, connecting a controlled current source to the direct current bus of the network side part, and taking the current of the controlled current source as the current of the network side direct current bus;
the current of the net side direct current bus is N times of that of the machine side direct current bus;
the machine side part comprises a permanent magnet direct-driven wind turbine generator and a machine side converter, and the grid side part comprises a grid side converter.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
in the electromagnetic transient simulation method of the permanent magnet direct-driven wind turbine, the operation parameters of the simulated permanent magnet direct-driven wind turbine and the simulation parameters of a single machine model are obtained; constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model; performing electromagnetic transient simulation on the permanent magnet direct-driven wind turbine based on the power amplification model; the 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, and the simulation process occupies little resources and has high simulation precision;
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.
Drawings
FIG. 1 is a flow chart of an electromagnetic transient simulation method of a permanent magnet direct drive wind turbine in an embodiment of the invention;
FIG. 2 is a block diagram of a stand-alone model in an embodiment of the invention;
fig. 3 is a schematic diagram of a network-side converter controller of a power amplification model according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a machine side variable current controller of a power amplification model in an embodiment of the invention;
fig. 5 is a schematic diagram of dc bus current control of a power amplification model in an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Example 1
The embodiment 1 of the invention provides an electromagnetic transient simulation method of a permanent magnet direct-driven wind turbine, a specific flow chart is shown in fig. 1, and the specific process is as follows:
s101: acquiring operation parameters of a simulated permanent magnet direct-driven wind turbine and simulation parameters of a single machine model;
s102: constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model;
s103: performing electromagnetic transient simulation on the permanent magnet direct-driven wind turbine generator based on a power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters.
The construction of the power amplification model comprises the following steps:
determining the multiple N of the power amplification model to the single machine model according to the number of the simulated permanent magnet direct-driven wind turbines;
parameters of the single machine model are adjusted to obtain parameters of the power amplification model;
wherein, the adjusting the parameters of the single machine model comprises: the parameters of the single machine model are enlarged by N times, reduced by N times or kept unchanged.
The structure of the single machine model is shown in fig. 2, wherein AC is an alternating current power supply, T is a transformer, WC Controller is a grid-side converter Controller, JC Controller is a machine-side converter Controller, and L wcl 、R wcl 、C wcl The filter inductance, the filter resistance and the filter inductance are respectively the filter inductance of the grid-side converter, L jcl 、R jcl 、C jcl Filter inductance, filter resistance and filter inductance of the machine side converter respectively, C dc And the direct current bus capacitor is adopted, and M is a permanent magnet direct drive wind turbine generator.
The main circuit parameters comprise permanent magnet direct-drive unit parameters, machine side converter filtering parameters, direct-current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive unit parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters include a current loop scaling factor and a current loop integration factor.
The method for adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter: the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter are kept unchanged.
The method for adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is a DC bus capacitance parameter: and expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model.
The method for adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is the filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are filter resistance and filter inductance: and respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model.
The method for adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are the current loop control parameters of the network side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model; as shown in FIG. 3, U' dc DC bus voltage of power amplification model, U' gabc For power amplification model grid voltage, I' wabc For power amplification model grid-side converter current, K' WIp For the current loop ratio coefficient, K 'of the power amplification model network side converter controller' WIi For integrating coefficient, K of current loop of power amplification model network side converter controller WIp The current loop ratio coefficient, K of the single-machine model network side converter controller WIi Integrating coefficients of current loops of the single-machine model network side variable current controller;
when the simulation parameter is a current loop control parameter of the machine side variable current controller: the current loop control parameters of the machine side variable current controller remain unchanged as shown in fig. 4, U' dc DC bus voltage of power amplification model, U' jabc For power amplification model grid voltage, I' jabc For power amplification model side converter current, K' JIp For the current loop ratio coefficient, K 'of the power amplification model machine side variable current controller' JIi For the integration coefficient, K of the current loop of the side converter controller of the power amplification model JIp The current loop ratio coefficient, K, of the single-machine model machine side variable current controller JIi The integral coefficient of the current loop of the single-machine model machine side variable current controller is obtained.
Parameters of a single machine model are adjusted to obtain parameters of a power amplification model, the single machine model is divided into a machine side part and a network side part from a direct current bus, the direct current bus of a controlled current source access network side part is adopted, and the current of the controlled current source is used as the current of the network side direct current bus; as shown in fig. 5, I is a machine side dc bus current, NI is a net side dc bus current, and the net side dc bus current is N times greater than the machine side dc bus current; the machine side part comprises a permanent magnet direct drive wind turbine and a machine side converter, and the net side part comprises a net side converter.
Example 2
Based on the same inventive concept, embodiment 2 of the present invention further provides an electromagnetic transient simulation device of a permanent magnet direct drive wind turbine generator, which includes an acquisition module, a modeling module and a simulation module, and the functions of the above modules are described in detail below:
the acquisition module is used for acquiring the operation parameters of the simulated permanent magnet direct-driven wind turbine generator and the simulation parameters of the single machine model;
the modeling module is used for constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model;
the simulation module is used for carrying out electromagnetic transient simulation on the permanent magnet direct-driven wind turbine generator based on the power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters.
The modeling module includes:
the determining unit is used for determining the multiple N of the power amplification model to the single machine model according to the number of the simulated permanent magnet direct-driven wind turbines;
the adjusting unit is used for adjusting the parameters of the single-machine model to obtain the parameters of the power amplification model;
wherein, the adjusting the parameters of the single machine model comprises: the parameters of the single machine model are enlarged by N times, reduced by N times or kept unchanged.
The main circuit parameters comprise permanent magnet direct drive motor parameters, machine side converter filtering parameters, direct current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive motor parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters include a current loop scaling factor and a current loop integration factor.
The adjusting unit adjusts parameters of the single machine model to obtain parameters of the power amplification model, and the parameters are as follows:
when the simulation parameters are the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter: the parameters of the permanent magnet direct drive motor and the filtering parameters of the machine side converter are kept unchanged.
The adjusting unit adjusts parameters of the single machine model to obtain parameters of the power amplification model, and the parameters are as follows:
when the simulation parameter is a DC bus capacitance parameter: and expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model.
The adjusting unit adjusts parameters of the single machine model to obtain parameters of the power amplification model, and the parameters are as follows:
when the simulation parameter is the filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are filter resistance and filter inductance: and respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model.
The adjusting unit adjusts parameters of the single machine model to obtain parameters of the power amplification model, and the parameters are as follows:
when the simulation parameters are the current loop control parameters of the network side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model;
when the simulation parameter is a current loop control parameter of the machine side variable current controller: the current loop control parameters of the machine side variable current controller remain unchanged.
The adjusting unit divides the single machine model into a machine side part and a network side part from a direct current bus, the direct current bus of the controlled current source access network side part, and the current of the controlled current source is used as the current of the network side direct current bus;
the current of the net side direct current bus is N times of that of the machine side direct current bus;
the machine side part comprises a permanent magnet direct drive wind turbine and a machine side converter, and the net side part comprises a net side converter.
For convenience of description, the parts of the above apparatus are described as being functionally divided into various modules or units, respectively. Of course, the functions of each module or unit may be implemented in the same piece or pieces of software or hardware when implementing the present application.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. 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, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and a person skilled in the art may still make modifications and equivalents to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims of the present invention as filed herewith.
Claims (2)
1. The electromagnetic transient simulation method of the permanent magnet direct-driven wind turbine generator is characterized by comprising the following steps of:
acquiring operation parameters of the permanent magnet direct-driven wind turbine and simulation parameters of a single machine model;
constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model;
performing electromagnetic transient simulation on the permanent magnet direct-driven wind turbine based on the power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters;
the construction of the power amplification model comprises the following steps:
determining the multiple N of the power amplification model to the single machine model according to the number of the permanent magnet direct drive wind turbines;
adjusting the simulation parameters of the single machine model to obtain power amplification model parameters;
wherein, the adjusting the simulation parameters of the single machine model comprises:
expanding the simulation parameters of the single machine model by N times, shrinking the simulation parameters by N times or keeping the simulation parameters unchanged;
the main circuit parameters comprise permanent magnet direct drive motor parameters, machine side converter filtering parameters, direct current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive motor parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters comprise a current loop proportional coefficient and a current loop integral coefficient;
the step of adjusting the simulation parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are permanent magnet direct drive motor parameters and machine side converter filtering parameters: the permanent magnet direct-drive motor parameters and the machine side converter filtering parameters are kept unchanged, so that the permanent magnet direct-drive motor parameters and the machine side converter filtering parameters of the power amplification model are obtained;
the step of adjusting the parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is a DC bus capacitance parameter: expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model;
the step of adjusting the simulation parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameter is a filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are a filter resistor and a filter inductance: respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model;
the step of adjusting the simulation parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
when the simulation parameters are current loop control parameters of the grid-side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model;
when the simulation parameters are current loop control parameters of the machine side variable current controller: the current loop control parameters of the machine side variable current controller are kept unchanged, and the current loop control parameters of the machine side variable current controller of the power amplification model are obtained;
the step of adjusting the simulation parameters of the single machine model to obtain the parameters of the power amplification model comprises the following steps:
dividing the single machine model into a machine side part and a network side part from a direct current bus, connecting a controlled current source to the direct current bus of the network side part, and taking the current of the controlled current source as the current of the network side direct current bus;
the current of the net side direct current bus is N times of that of the machine side direct current bus;
the machine side part comprises a permanent magnet direct-driven wind turbine generator and a machine side converter, and the grid side part comprises a grid side converter.
2. An electromagnetic transient simulation device of a permanent magnet direct-driven wind turbine generator, which is characterized by comprising:
the acquisition module is used for acquiring the operation parameters of the permanent magnet direct-driven wind turbine generator and the simulation parameters of the single machine model;
the modeling module is used for constructing a power amplification model based on the operation parameters and simulation parameters of the single machine model;
the simulation module is used for carrying out electromagnetic transient simulation on the permanent magnet direct-driven wind turbine generator based on the power amplification model;
the simulation parameters comprise main circuit parameters, direct current bus current parameters and control parameters;
the modeling module includes:
the determining unit is used for determining the multiple N of the power amplification model to the single machine model according to the number of the permanent magnet direct-driven wind turbines;
the adjusting unit is used for adjusting the simulation parameters of the single machine model to obtain the parameters of the power amplification model;
wherein, the adjusting the simulation parameters of the single machine model comprises: expanding the parameters of the single machine model by N times, shrinking the parameters by N times or keeping the parameters unchanged;
the main circuit parameters comprise permanent magnet direct drive motor parameters, machine side converter filtering parameters, direct current bus capacitance parameters and network side converter filtering parameters;
the permanent magnet direct-drive motor parameters comprise stator resistance, positive sequence inductance and negative sequence inductance;
the filtering parameters of the machine side converter and the filtering parameters of the network side converter comprise a filtering capacitor, a filtering inductor and a filtering resistor;
the control parameters comprise a current loop control parameter of the machine side variable current controller and a current loop control parameter of the network side variable current controller;
the current loop control parameters comprise a current loop proportional coefficient and a current loop integral coefficient;
the adjusting unit is specifically configured to:
when the simulation parameters are permanent magnet direct drive motor parameters and machine side converter filtering parameters: the permanent magnet direct-drive motor parameters and the machine side converter filtering parameters are kept unchanged, so that the permanent magnet direct-drive motor parameters and the machine side converter filtering parameters of the power amplification model are obtained;
the adjusting unit is specifically configured to:
when the simulation parameter is a DC bus capacitance parameter: expanding the direct current bus capacitance parameter of the single machine model by N times to obtain the direct current bus capacitance parameter of the power amplification model;
the adjusting unit is specifically configured to:
when the simulation parameter is a filter capacitance: expanding the filter capacitance of the single machine model by N times to obtain the filter capacitance of the power amplification model;
when the simulation parameters are a filter resistor and a filter inductance: respectively reducing the filter resistor and the filter inductance of the single machine model by N times to obtain the filter resistor and the filter inductance of the power amplification model;
the adjusting unit is specifically configured to:
when the simulation parameters are current loop control parameters of the grid-side converter controller: reducing the current loop control parameter of the grid-side converter controller by N times to obtain the current loop control parameter of the grid-side converter controller of the power amplification model;
when the simulation parameters are current loop control parameters of the machine side variable current controller: the current loop control parameters of the machine side variable current controller are kept unchanged, and the current loop control parameters of the machine side variable current controller of the power amplification model are obtained;
the adjusting unit is specifically configured to:
dividing the single machine model into a machine side part and a network side part from a direct current bus, connecting a controlled current source to the direct current bus of the network side part, and taking the current of the controlled current source as the current of the network side direct current bus;
the current of the net side direct current bus is N times of that of the machine side direct current bus;
the machine side part comprises a permanent magnet direct-driven wind turbine generator and a machine side converter, and the grid side part comprises a grid side converter.
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