基于瞬时无功功率理论的无功电流检测

三相电路瞬时无功功率理论在谐波和无功电流的实时检测方面得到成功的应用,最早提出的ip-iq法和d-q法都需要锁相环和低通滤波器.此处对只能检测基波的基于幅值积分的方法进行改进,提出一种能同时检测无功、谐波电流的方法,并采用基于幅值积分的方法直接检测单相电路的基波电流,进行仿真分析.结果表明,该方法能准确检测出谐波电流和...

Detection for Reactive Current Based on the Theory of Instantaneous Reactive Power

Three-phase circuit instantaneous reactive power theory is applied in detecting harmonic and reactive cur-rent timely successful,the ip-iq and d-q method which is first proposed require the phase-locked loop and low-pass filter.This paper makes corresponding improvement on the basis of the method based on amplitude integration which only can detect fundamental current,proposes a method which can detect the active and reactive current,and the method based on amplitude integration can detect fundamental current of single-phase circuit directly.The simulation results show that the method can detect the harmonic and reactive current accurately and timely,and is suitable for various circumstances that three-phase power supply distortion and asymmetry and so on.The paper deduces the theo-ry of the method and it verified by experiment.