CAJ | 학술논문

有源电力滤波器的工作性能很大程度上取决于是否能够准确、实时地检测无功及谐波电流。针对单相系统瞬时无功与谐波检测算法复杂的问题，提出了一种改进的检测方法。不需要锁相环（PLL）和复杂的硬件电路，利用正交波形特性检测出电压相位，不仅减少了计算量，并且可根据需求分别检测出总谐波电流或特定次谐波的大小。该算法还能直接推广应用于三相三线制、三相四线制系统无功及谐波电流检测。
유원전력려파기적공작성능흔대정도상취결우시부능구준학、실시지검측무공급해파전류。침대단상계통순시무공여해파검측산법복잡적문제，제출료일충개진적검측방법。불수요쇄상배（PLL）화복잡적경건전로，이용정교파형특성검측출전압상위，불부감소료계산량，병차가근거수구분별검측출총해파전류혹특정차해파적대소。해산법환능직접추엄응용우삼상삼선제、삼상사선제계통무공급해파전류검측。
Detecting reactive and harmonic currents highly precise and real-time makes important influence on active power filter. In this paper, an improved method is proposed in order to detect the reactive and harmonic currents in single-phase power systems. It can detect the grid voltage phase angle based on the orthogonal characteristics without using the phase lock loop ( PLL ) and complex hardware circuit . The improved method can not only decrease the calculation capacity, but also detect the sum harmonic currents or the specific harmonic currents according to different requirements. It can be directly used in three-phase three-wire or three-phase four-wire systems to detect the reactive and harmonic current.