Improved Detection Method of Current Component Based on Instantaneous Reactive Power Theory

Due to i_p-i_q current detection method based on instantaneous reactive power theory will produce detecting error when voltage is unbalance, This paper proposed a method which uses the phase angle of positive sequence fundamental voltage to correct the error, Simulation results show that the active and reactive component of positive sequence fundamental current and the active and reactive component of negative sequence fundamental current can be obtained rapidly and accurately.