基于单相电路瞬时功率理论的有源电力滤波器谐波电流实时检测方法

Harmonic Current Real-Time Detection Methods for Active Power Filter Based on Instantaneous Power Theory of Single-Phase Circuit

基于单相电路瞬时功率理论,提出了单相电路谐波电流检测方法,并进行仿真和实验,进而得到了三相电路谐波电流检测方法。三相电路谐波电流检测方法的各相谐波电流检测电路相互独立,互不影响,它不仅适用于三相对称电路,而且适用于三相非对称电路,它具有普遍的适用性。该方法具有电路结构简单、计算量小、实时性好、稳定性好、可靠性高等特点。

Based on single-phase circuit instantaneous power theory, the way to detect harmonic current in single-phase circuit was proposed, then this circuit was simulated and tested, thus the way to detect harmonic current in three-phase circuit was obtained. The detecting circuit in each phase was independent. It can be applied in both symmetrical and asymmetrical three-phase circuits, which had a wide application range. This detecting way features with simple circuit, little calculation, good real-time performance, good stability and high reliability.