一种无坐标变换谐波及无功电流检测方法

he paper presents a detection method, which can expediently extract harmonic and reactive currents under asymmetric or distorted supply voltage conditions. The proposed method extracts harmonic and reactive currents through three-phase voltage and current algorithmic amendatory based on instantaneous reactive power theory. Hysteresis current control is adopted to obtain compensation currents, which has good compensation performance and control precision. Simulations of three-phase active power filter show that the proposed detection has merits of simple arithmetic and it can restrain the infection resulting from distorted supply voltage.