双馈风力发电系统实时仿真试验研究

Test and Research Platform for DFIG System Based on Real-time Simulation

研究常用双馈风力发电机组的主电路结构及控制策略,通过对同一母线上的风电机组进行等效得到风力发电系统的等值数学模型,并基于实时数字仿真技术建立了相应的仿真模型。在此基础上,构建了双馈风力发电系统实时仿真试验平台,模拟不同运行方式下风电场联络线路发生的接地故障。对仿真结果进行分析,研究得到风电场的短路故障特性。试验研究结果为进一步实现风电场保护装置及其它自动化装置的闭环测试打下基础,为风电场及电网系统安全可靠运行提供有力保障。

According to the research on the main circuit structure and control sheme of doubly-fed induction generator(DFIG), study on the equivalent mathematical model and the real-time digital simulation model for wind-power system was set up on RTDS. Based on tests and research platform for DFIG, the short-circuit characteristics of wind farm during the earth fault were derived. The simulation results under different operating conditions provide important foundation for close-loop tests on relay protection devices and other automation equipments in wind power plant. The results also provide powerful guarantee on safe and reliable operation of the wind farm and power grid.