VSI Based DSTATCOM for Compensating Nonlinear and Unbalanced Loads

Abstract

This paper presents study of distribution static compensator (D-STATCOM) for compensation of neutral current, source&PCC current harmonic distortion, PCC voltage regulation and compensation of unbalanced current waveform for the three phase four wire nonlinear and unbalanced load medium voltage distribution system. The proposed control algorithm is developed based on synchronous reference frame theory with PI controller. The obtained reference current signal from control algorithm is compared in hysteresis band current controller for better switching of D-STATCOM. The performance of system without & with D-STATCOM is also analysed and compared. The proposed control method is implemented on 11/0.4kv medium voltage distribution system and it is provided effective compensation for reactive power and harmonic distortion mitigation. The simulation results are obtained using MATLAB/SIMULINK.

Enhancement of Power Quality Utilizing Photovoltaic fed D-STATCOM Based on Zig-Zag Transformer and Fuzzy Controller

“…The compensator implemented in [22] is suitable for three-phase three-wire systems and harmonic compensation and is not able to compensate for neutral current. In [23], a study on the four-leg VSI based D-STATCOM for compensation of neutral, source current harmonic distortion and compensation of unbalanced in current waveform has been presented. The studied control system is based on synchronous reference frame theory with the PI controller.…”