【摘要】 谐波检测方法在有源电力滤波器中起着关键作用,分析了基于瞬时无功理论的ipiq谐波检测方法的基本原理,并把他推广到任意次谐波的检测。仿真结果表明这种检测方法具有很好的稳态精度和动态性能,即使在电网频率变化的情况下,采用频率跟踪技术后ipiq法也可以快速准确地检测出电网总体谐波或任意次谐波分量。更多还原

【Abstract】 It is very important for Active Power Filter（APF） to（extract） the harmonic currents accurately and quickly.The paper discusses the principle of i_p-i_qharmonic extraction method based on Instantaneous Reactive Power Theory（IRPT） and expends it to extract a selective harmonic.The simulation proves the good dynamic performance and precision of the method.the harmonic current or（selective） harmonic currents can be extracted accurately and quickly with frequency tracing technique even if the frequency of power grid is changing.更多还原