Experimental implementation of sliding mode controller for DC-link voltage regulation in three-phase bidirectional rectifier

The proposed paper is mainly focused on achieving high performance direct power control of 3-phase bidirectional rectifier. The load impact rejection, controlled DC-link voltage at the required level and unity power factor achievement with least harmonics may not be easily handled by conventional Proportional-Integral (PI) controller due to their limited control bandwidth. Hence, a sliding mode (SM) regulator for DC-link voltage controller is designed, which is well known as a powerful tool in compensation of the aforementioned power quality problems. The proposed control strategy is modulated and implemented experimentally based on dSPACE DS1104 DSP board. The steady-state and dynamic experimental results have been presented and analyzed in detail to illustrate the operation and performance of the developed control technique.