A Summary of Harmonic Detection in Electricity Distribution Based on the Instantaneous Power Theory

In order to prove that the Instantaneous power theory can be applied to the power quality research field, applications of the harmonic detection method based on the instantaneous power theory in three-phase four-wire electricity distribution and single-phase electricity distribution were discussed. Moreover, basic approaches of the instantaneous power, \( pq \) method and \( {i_p}-{i_q} \) method were introduced. Simulations about \( pq \) method and \( {i_p}-{i_q} \) method were built by the MATLAB software to confirm the validity of the method. The harmonic detection method based on instantaneous power theory in three-phase four-wire electricity distribution and single-phase electricity distribution was easy to implement, and harmonic current can be detected accurately and real-time in the case of voltage distortion or frequency changes.