DefinePK

Abstract

Now-a-days, the voltage and current wave-shapes of distribution system is deviated due to power-electronic controlled non-linear load devices causing severe power-quality issues. Among the various custom-compensation devices, the DSTATCOM is most suitable for eradication of harmonic currents, reactive-power control, voltage balancing, power-factor correction, etc. The DSTATCOM utilizes the inverter for mitigation, but it is un-popular because of high rated switching devices, absence of current-sharing principle, high size and low efficiency, so on. A parallel-connected dual-inverter based DSTATCOM is also available; it reduces the rated capacity of DSTATCOM. But, un-popular due to complex control circuitry and dual DC capacitors, need of more switches which increases the switching losses, size, cost, complex design and low efficiency. In this paper, a novel reduced-switch isolated-VSIs DSTATCOM has been developed for PQ enhancement in distribution system using proposed MRE-PWM control scheme. The performance evaluation of proposed reduced-switch isolated-VSIs DSTATCOM is investigated in balanced, un-balanced and variable non-linear load conditions by using Matlab-Simulink computational tool, simulation results are presented.