Implementation of Direct Current Control Strategy For PWM Rectifier Under Unbalanced Input Voltage Circumstances

Abstract

This paper proposes an easy and successful current control scheme for an unbalanced supply voltage correction approach in a 3ɸPulse Width Modulation (PWM) rectifier. The voltage unbalance generates input current with higher magnitude and increased Total Harmonic Distortion (THD). The projected direct current controller concurrently minimizes total harmonic distortion and unbalanced components in the supply voltages. The technique is easy to execute and examine well even under extreme non-ideal conditions. The proposed strategy is specifically required to eliminate the second harmonic presented in the DC link. Simulation outcome reveals the best assessment of the suggested controller, despite asymmetry in input voltages. Finally, the results obtained using direct current control is contrasted with the traditional constant frequency method.