Research on Improved p-q Reactive Current Detection Method Based on Synchronous Rotary Angle

Abstract

Based on the analysis of the reactive current detection method based on the instantaneous power theory, a voltage detection method based on the synchronous rotary angle is proposed. At the same time, the voltage detection method is introduced into the traditional p-q detection method to form an improved p-q reactive current detection method based on the synchronous rotary angle. This method realizes the accurate detection of reactive current when the three-phase grid voltage is unbalanced or contains harmonics. The Matlab/Simulink simulation verification proves that the method has high detection accuracy, good dynamic performance, and can meet the requirements of reactive power compensation current detection.