基于DFIG风电并网的VSC-HVDC电压稳定性分析  

Analysis on Voltage Stability Enhancement of VSC-HVDC Based on Grid-connected Wind Power with DFIG

作　　者：张明光[1] 张彦凯[1] 赵金亮[1] 刘进文 

机构地区：[1]兰州理工大学电信学院,甘肃兰州730050 [2]甘肃省第一建设集团责任有限公司安装工程公司,甘肃兰州730050

出　　处：《电气自动化》2011年第3期38-42,共5页Electrical Automation

摘　　要：研究了基于双馈感应电机(doubly-fed induction generator,DFIG)的电压源高压直流输电(voltage source convertor-high voltagedi-rect current,VSC-HVDC)系统的风电并网技术。为解决风电并网运行存在的电压稳定性的问题,通过对风电机组无功电压特性的分析,提出了无功补偿电容量的不同投切方法和计算方式。结合风电场无功需求的特点,应用静止无功补偿器(StaticVarCompensator,SVC)进行无功补偿优化。利用Matlab/Smiulink仿真软件对该方案进行了仿真分析。仿真结果表明:SVC可以提供动态电压支撑,能够降低风电功率波动对电网电压的影响,改善系统运行性能,确保电网安全稳定。Studied voltage source convertor-high voltage direct current system grid-connected wind power technology based on doubly-fed induction generator.To solve the voltage stability problem of the grid-connected wind farm,various calculation methods for the capacity of the reactive compensation capacitor as well as its switching modes were proposed based on the var-voltage characteristics of the wind turbine generator.According to the reactive power demand features of the wind power,used the SVC for reactive power compensation optimization.Simulations were carried out on the platform of Matlab/Simulink.The results show that SVC can provide dynamic voltage support,reduce wind power fluctuations on the grid voltage and improve the system operation performance and insure grid security and stability.

关 键 词：风力发电 双馈电机 电压稳定 无功补偿 电压源高压直流输电 

分 类 号：TM614[电气工程—电力系统及自动化]