自适应谐波电流检测算法

摘要

Adaptive method (AM) is the shortened form of the adaptive detection method for harmonic current, a method that uses adaptive noise canceling technology as its detection principle and adopts hardware circuits to realize. AM has a strong adaptive ability.However,AM still doesn't have a corresponding digitized algorithm,aiming at this problem,a corresponding digitized algorithm of AM,namely,an adaptive detecting algorithm for harmonic current is obtained according to the detecting circuit of AM.In order to test the validity of this algorithm, digital simulation and experiment have been conducted.Digital simulation opens out how the sampling number in a cycle and the integral gain of AM influences on the detection performance of the algorithm.Experiment validates: The algorithm can authentically compute the harmonic current of load current and it has nice stability,high reliability,fine real-time performance, and fast tracking speed.%自适应法是以自适应噪声对消技术为检测原理,采用硬件电路实现的自适应谐波电流检测方法的简称,它具有强的自适应能力.自适应法尚无对应的数字化算法,针对此问题,根据自适应法的检测电路,得到了自适应法对应的数字化算法即自适应谐波电流检测算法.为了验证该算法的有效性,对其进行了数字仿真和实验.仿真揭示了一个周期内的采样个数和自适应法中的积分增益对该算法检测性能的影响.实验证实,该算法可以计算出负载电流中的谐波电流,并具有稳定性好、可靠性高、实时性好、跟踪速度快等特点.