Accident of Large-scale Wind Turbines Disconnecting from Power Grid and Its Protection

作     者：Dong, X.Z. Shi, S.X. Wang, B. Bak, D.J. Cao, R.B. Ren, L. Lan, L. He, S.E. 

作者机构：State Key Lab. of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China Wind Power Technology Center Gansu Electric Power Corporation Lanzhou 730050 China 

出 版 物：《电力系统自动化》 (Automation of Electric Power Systems)

年 卷 期：2012年第36卷第8期

页      面：105-109页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by Major International Collaborative Project of National Natural Science Foundation of China(No.51120175001) Key Project of National Natural Science Foundation of China(No.50937003) 

主　　题：大型风力发电机组 低电压保护 电网事故 断开 单相接地故障 风力涡轮机 故障检测 切断电源 

摘      要：There were many accidents of large-scale wind turbines disconnecting from power grid in *** singlephase-to-ground fault cannot be correctly detected,single-phase-to-ground fault evolved to phase-to-phase ***-to-phase fault was isolated slowly,thus leading to low *** wind turbines without enough low voltage ride-through capacity had to be disconnected from the *** some wind turbines being disconnected from the grid,overvoltage caused by reactive power surplus made more wind turbines disconnect from the *** on the accident analysis,this paper presents solutions to above problems,including travelling waves based single-phase-to-ground protection,adaptive low voltage protection,integrated protection and control,and high impedance fault *** solutions lay foundations in theory and technology to prevent large-scale wind turbines disconnecting from the operating power grid.