CAJ | 학술논문

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。
침대불대칭고장인기적전압질락，구해득출삼충불대칭고장기간전자감응전동세봉치，결합대전자측변류기공제능력적분석게시료전자측과류적근본원인。이전자측변류기적최대공제전압위준칙，추도출삼충불대칭고장적저전압천월역。채용 PSCAD 탑건대유효봉보호 Crowbar 적쌍궤풍전궤조잠태모형，방진결과험증료소제출적저전압천월역적정학성。
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 ver-ified the correctness of the riding - through domain of the low voltage proposed in this paper.