Abstract：The effectiveness of single phase and three phase detection method based on #em/em#p-#em/em#q and d-q transformer is limited by phase lock loop’s（PLL）signal error. The detecting method without PLL is difficult to detect active and reactive current of fundament frequency current. A PLL-less single phase detect method is presented to detect active, reactive and harmonics currents with little time delay. A pre-designed refereed sine signal with random frequency and phase is adopted to replace the PLL. This kind of detecting method has strong immunity to voltage distortion and frequency error, and can vary with voltage frequency automatically in case low frequency signal is detected effectively. The research on low frequency signal’s extracting method of low pass filter(LPF) and integrator shows that the later has better precision and dynamic performance. At last, theory analysis and result of simulation prove the validity of the method.
周福林, 李群湛, 解绍峰, 郭成. 无锁相环单相无功谐波电流实时检测方法[J]. 电工技术学报, 2010, 25(1): 178-182.
Zhou Fulin, Li Qunzhan, Xie Shaofeng, Guo Cheng. Real Time Detecting Method for Single-Phase Reactive and Harmonics Currents Detection Without PLL. Transactions of China Electrotechnical Society, 2010, 25(1): 178-182.
2010, Vol. 25 
