并网型双馈风力发电机组的动态模型仿真研究

Study of Dynamic Model Simulation Based on Incorporated Double-fed Wind Turbine Generator

本文在介绍双馈电机数学模型的基础上,对变流器模型采用定子磁链的定向矢量控制,为满足研究风速变化情况下的风力发电机组的运行特性和电网电压跌落时风电机组不脱网运行,通过分析风速变化和电网电压跌落情况下的双馈风力发电机组的运行特点,建立了风力发电机组的模型并利用PSCAD软件对风电并网建模、并对风速变化以及电网电压跌落进行仿真分析。仿真结果验证了风速变化情况下,风电机组具有一定的动态适应能力,以及矢量控制可以改善系统的低电压穿越能力。

In this paper ,we use oriented vector control of the stator flux based on introducing mathematical model of DFIG In order to satisfy the study of the operating characteristics of wind turbine generators in changing wind speed situation and not off-grid operation when grid voltage drops off, we build model of the wind turbine generators by analysising the operating characteristics of double-fed wind turbine generators in the condition that the wind speed changes and grid voltage drops off. Use PSCAD to model the wind turbine incorporation, and simulate the condition that the wind speed changes and grid voltage drops off. The result of the simulation verifies that the wind turbine has dynamic adaptive ability when wind speed changed and that vector control can improve low voltage ride through of the system.