Research on Harmonic Detection Algorithm Based on Atomic Sparse Decomposition

With the development of power grids, the access of non-linear loads such as uninterruptible power system (UPS), switching power supplies, rectifiers, frequency converters, inverters, etc., fundamental wave currents are prone to distortion and harmonics. Harmonic detection and decomposition are the preconditions for harmonic control. In this paper, the atomic sparse decomposition method is studied for power system harmonic detection problems. Based on the overcomplete sine quantity atomic library, the optimized matching pursuit algorithm is used to analyze the signal. Gradually decompose. This paper elaborates on the four aspects of the construction of the atomic library, the implementation of the algorithm, the complexity of the algorithm and the detection performance of the algorithm, and compares it with the ip-iq detection method in the instantaneous reactive power theory to verify that the algorithm is effective and superior in harmonic detection.