摘要
介绍了统一潮流控制器 (UPFC)的直流侧电容两端电压的波动影响逆变输出电压的精度 ,并针对这一问题 ,提出了一种动态的正弦脉宽调剂 (SPWM)方法。这种动态的SP WM方法根据直流侧电容电压的波动 ,动态地修正载波uc的频率 fc,从而动态地调整逆变输出脉冲的宽度。通过对仿真结果的对比分析 ,证明了这种动态的SPWM方法能够提高逆变输出的精度 。
The fluctuation of capacitor voltage in unified power flow controller(UPFC) affects the accuracy of the output. To solve this problem,a new method is put forward. The frequency of the carrier wave can be modified according to the capacitor voltage. The result of the simulation proves that the accuracy of output can be improved by applying this dynamic SPWM method.
出处
《电力情报》
2001年第2期31-33,共3页
Information on Electric Power
