基于实际风电场的双馈感应风电机组联网运行特性仿真分析

The Simulation Analysis of Integration for Doubly-fed Wind Generators Based on Actual Wind Farms

随着并网运行风电场数量逐年剧增,双馈感应风电机组作为广泛应用的主流机型之一,其联网运行特性对研究风电场与电网之间的交互作用具有重要作用。本文给出了双馈感应风电机组的数学模型,包括风力机模型、发电机模型和四象限变流器模型。以东北某实际风电场双馈感应风电机组为例,在PSCAD/EMTDC电力系统仿真平台上,搭建了双馈感应风电机组联网运行仿真系统,对双馈感应风电机组在不同工况下的联网运行特性进行了分析,揭示双馈感应风电机组联网运行特性,电气设备阻抗参数与外特性之间的内在关联关系。

With the increase of wind generators connected to the grid, integration characteristics of doubly-fed wind generators, whichare widely used in wind power system, play an important role in the interaction between wind farms and grid. Math model of doubly-fedwind generators has been set, including the wind turbine model, generators model and four-quadrant converter model. With the help ofPSCAD/EMTDC, doubly-fed wind generator model which is based on the actual wind farms in the northeastern China has been simula-ted. Networking operation characteristics of wind turbines in different working conditions are analyzed. Internal relations between electri-cal equipment impedance parameters and external characteristics have been revealed by the simulation results.