电力系统自动化2018，Vol.42Issue(1)：125-131,7.DOI:10.7500/AEPS20170305002
动态调整转子撬棒阻值的双馈风电机组低电压穿越方法
Low Voltage Ride-through Method of DFIG Based Wind Turbines by Dynamically Adjusting Crowbar Resistance of Rotor
摘要
Abstract
The doubly-fed induction generator(DFIG)on the power grid changes the transient performance of sources in power system.A rotor Crowbar is usually used to realize low voltage ride-through(LVRT)during short-circuit fault.The transient performance of DFIG is determined by the fault inception and the system fault severity.It is hard to achieve LVRT in various degrees of fault severity using the fixed resistance Crowbar.The expression of transient rotor current with Crowbar resister input is deduced.A LVRT scheme of DFIG by dynamically adjusting Crowbar resistance is proposed.An adaptive control strategy and the resistance setting method are given.Applying the scheme proposed,the LVRT performance of DFIG is simulated during different voltage dips.The results show that it is effective to suppress rotor current and DC bus voltage using the scheme proposed.Meanwhile the working time of Crowbar is shortened and action times are cut down.关键词
双馈感应发电机/自适应控制/低电压穿越/转子撬棒Key words
doubly-fed induction generator(DFIG)/adaptive control/low voltage ride-through(LVRT)/rotor Crowbar引用本文复制引用
姜惠兰,范中林,陈娟..动态调整转子撬棒阻值的双馈风电机组低电压穿越方法[J].电力系统自动化,2018,42(1):125-131,7.基金项目
国家自然科学基金资助项目(51477115).This work is supported by National Natural Science Foundation of China(No.51477115). （51477115）
