正弦跟踪器在谐波电流检测中的应用

基于最小均方算法的自适应电流检测法具有实现简单,自适应强等优点,但算法本身幅值与相角存在非线性耦合关系,不利于准确跟踪畸变电流基波分量。这里研究了一种正弦跟踪的电流检测算法,通过将变量旋转变换消除了上述问题,既能保证谐波检测过程中具有较快的动态响应速度,又可保证具有较小的稳态失调,同时可用于三相、单相、多谐波和不对称的负载电流谐波检测中。实验结果验证了该算法的有效性。

Harmonic Current Detection Based on Sinusoid Tracer

The self-adaptive harmonic detection method which is based on least squares algorithm,is easy to be real-ized and has strong self-adaptive ability.There has the relationship between the amplitude and phase of algorithm is nonlinear coupling,so it is not conductive to track the fundamental component of distorted current accurately.A harmonic current detection based on linear sinusoid is presented.Elimination of the issue by using rotating the variable,so it can obtain fast conver-gence speed and high steady precision at the same time.And the algorithm can be used in the three-phase,single-phase,multi-harmonics analysis and asymmetrical load current harmonic detection.Experience results show the effectiveness of the algorithm.