Double-fed wind turbine generator transient reactive characteristic simulation method and device

Abstract

The invention provides a method and a device for simulating transient reactive characteristics of a doubly-fed wind turbine generator. The method comprises the steps of performing electromagnetic transient real-time simulation on the doubly-fed wind turbine generator based on a pre-built control hardware-in-the-loop simulation model; determining transient reactive characteristics of the double-fedwind turbine generator based on the simulation result; constructing the control hardware-in-the-loop simulation model based on the doubly-fed motor unit and the encoder unit, the simulation step length is small, the data transmission delay is small, and the simulation result accuracy is high. According to the invention, an encoder is configured for the high-speed FPGA module; Double-fed motor, aconverter, a power grid and an acquisition unit, FPGA module simulation step size is small, the simulation requirement of a converter switching device with the switching frequency of several KHz or even dozens of KHz can be sufficiently met; A display storage unit and a data processing unit are configured for a low-speed CPU module, so that the simulation step length of the whole control hardwarein a loop simulation model can be small enough, the simulation precision requirement of a converter switch element is met, and a foundation is laid for double-fed wind turbine generator single-machinemodel simulation and wind power plant model simulation.

Description

technical field [0001] The invention relates to the technical field of electromagnetic transient simulation, in particular to a method and device for simulating transient reactive power characteristics of a doubly-fed wind turbine. Background technique [0002] With the large-scale access of wind farms, wind power has become another important power source other than synchronous machines in the power system, which will have a greater impact on the safe operation of the power grid. Faced with the frequent occurrence of severe wind power off-grid accidents, countries around the world have formulated and updated grid standards, and put forward newer and higher requirements for the fault ride-through capability of grid-connected wind turbines. The fault ride-through of wind turbines is not only a problem of the wind turbine itself, but also involves the dynamic stability of the entire power system. Therefore, it is very important to study the transient characteristics of wind tur...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of low accuracy in the prior art, the present invention provides a simulation method for the transient reactive power characteristics of a doubly-fed wind turbine. Based on a pre-built control hardware-in-the-loop simulation model, the electromagnetic transient real-time Simulation; determine the transient reactive power characteristics of the DFIG based on the simulation results; the control hardware-in-the-loop simulation model includes setting the DFIG unit and the encoder unit on the FPGA module, the simulation step size is small, the data transmission delay is small, and the simulation High accuracy of results

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