摘要
针对不对称故障引起的电压跌落,求解得出三种不对称故障期间转子感应电动势峰值,结合对转子侧变流器控制能力的分析揭示了转子侧过流的根本原因。以转子侧变流器的最大控制电压为准则,推导出三种不对称故障的低电压穿越域。采用PSCAD搭建带有撬棒保护Crowbar的双馈风电机组暂态模型,仿真结果验证了所提出的低电压穿越域的正确性。
According to the voltage dip caused by asymmetric faults,the peak value of the rotor voltage was calculated during the three asymmetric faults. The root cause of the rotor over current was revealed combined with the analysis of the control ability of the rotor side converter. On the basis of the maximum control voltage of the rotor side converter, the riding - through domain of the low voltage during the three different asymmetric faults was deduced. The transient model of the doubly - fed induction generator with crowbar protection was built by PSCAD. The simulation results verified the correctness of the riding - through domain of the low voltage proposed in this paper.
出处
《电测与仪表》
北大核心
2014年第13期42-46,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51207018)
吉林省科技发展计划资助项目(20130522174JH)
关键词
双馈感应发电机
低电压穿越
撬棒保护
不对称故障
doubly - fed induction generator
low voltage ride through
crowbar protection
asymmetric fault
