电力系统保护与控制2018，Vol.46Issue(10)：102-107,6.DOI:10.7667/PSPC170634
应用于风力发电系统中的撬棒阻值整定新方法
A new method of Crowbar resistance setting used in wind power generation system
摘要
Abstract
Doubly-Fed Induction Generator (DFIG) often adopts Crowbar protective circuit to realize Low Voltage Ride Through (LVRT) under voltage drop fault of power grid.Crowbar resistance will affect LVRT effect of the unit significantly.Time domain expression of transient current of the wind turbine generator system under the voltage drop fault and the calculation formula of fault current at the rotor side are deduced through space vector analysis and Laplace transformation based on the transient mathematical model of DFIG system under voltage drop.A Crowbar resistance adjustment method conforming to engineering practices is proposed,which overcomes the overcurrent at the rotor side and overvoltage of DC bus after Crowbar protective circuit is applied.Both case study and the simulation test demonstrate that the proposed method can inhibit the transient fault component effectively and increase the LVRT level of DFIG system significantly.关键词
双馈异步发电机/低电压穿越/撬棒阻值/电压跌落/暂态故障电流Key words
doubly-fed induction generator/low voltage ride though/Crowbar resistance/voltage drop/transient fault current引用本文复制引用
李圣清,明瑶,张煜文,吴文凤,马定寰..应用于风力发电系统中的撬棒阻值整定新方法[J].电力系统保护与控制,2018,46(10):102-107,6.基金项目
This work is supported by Natural Science Foundation of Hunan Province (No.2017JJ4024).湖南省自然科学基金资助项目(2017JJ4024) （No.2017JJ4024）
湖南省重点实验室(2016TP1018) （2016TP1018）
湖南省教育厅开放基金项目(15k036) （15k036）
