Multiple Harmonic Current Control Based on Adaptive Inverse Control

Abstract

In this study, a method for adaptive inverse control of multiple superimposed harmonic currents is proposed. The noise mechanism of multiple harmonic current in power capacitor is analyzed, and the multiple harmonic current is correctly reproduced under the real operation condition of the laboratory. In the converter station of high voltage direct current (HVDC) transmission, several power capacitors are required. When multiple superimposed AC harmonic signals flow through the power capacitors, they will generate vibration and noise. To study the characteristics of the noise generated by multiple superimposed AC harmonics flowing through the power capacitor, it is necessary to simulate the numerous superimposed harmonic currents under working conditions. This study uses the adaptive inverse control method to achieve accurate control of the superimposed harmonic currents of the required order, which is based on the multi-harmonic current injection system (MHCIS). The simulation findings validate the efficacy of the adaptive inverse control based multiple superimposed harmonic currents control approach put forward in this paper. The findings indicate that HVDC is simpler to control than conventional AC power supplies. HVDC transmission helps to improve the security and stability of regional power grid. It has strong transmission capacity and obvious advantages in long-distance transmission.