Research about Simulation of New Algorithm for Random Harmonic Current Detection

A new detection method for random harmonic current which was suitable for 3-wire and 3-phase unbalance system was put forward.The method was based on d-q rotating coordinate transformation,rotated in diffe-rent rotating angular velocity to detect the positive and negative phase sequence of different order harmonic current.The harmonic component to be detected could be got by adding the positive and negative phase sequence.Theoretical analysis and simulation proved the correctness of the method.