Enhancing HVRT Capability of DFIG-based Wind Farms Using Cooperative Rotor-side SMES Considering the Blocking Fault of LCC-HVDC System  

作　　者：Qi Xie Zixuan Zheng Xianyong Xiao Chunjun Huang Jiaqu Zheng Jie Ren 

机构地区：[1]College of Electrical Engineering,Sichuan University,Chengdu 610065,China [2]Center for Electric Power and Energy,Technical University of Denmark.4000 Roskilde,Denmark

出　　处：《CSEE Journal of Power and Energy Systems》2021年第4期698-707,共10页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51907134).

摘　　要：Line-commutated converter based high voltage direct current(LCC-HVDC)has been applied for transferring bulk power from wind farms to load centers through long distances in many countries.When the blocking fault of the LCC-HVDC system occurs,the surplus reactive power accumulated at the sending end will lead to an overvoltage,thus causing the discon・nection of the wind turbines.To maintain the reliable connection of wind turbines and ensure the stability of the power system,this paper introduces a superconducting magnetic energy storage(SMES)unit to connect in parallel with the rotor side of the doubly fed induction generator(DFIG).By controlling the energy side converter and rotor side converter to inject demagnetizing current and reactive current into the rotor,the proposed scheme can effectively stabilize key parameters of the wind turbine and provide desirable reactive power support,showing a favorable high voltage ride through(HVRT)performance.Several cases based on PSCAD/EMTDC&MATLAB/Simuiink co-simulation together with economic analysis are conducted to demonstrate the feasibility and superiority of the proposed scheme on enhancing HVRT capability of DFIG-based wind farms.

关 键 词：HVDC blocking fault DFIG superconducting magnetic energy storage'HVRT 

分 类 号：TM614[电气工程—电力系统及自动化]