Enhancement for Power Quality in Distribution Side Using Custom Power Devices

Abstract

Power quality (PQ) of power operating device is one of today's most discussed topic but also it is a most problematic subject in recent years. With increasing applications of nonlinear and electronically switched devices in distribution systems and industries, power-quality (PQ) problems, such as harmonics, neutral current elimination, reactive power has become an unavoidable issues. The introduction of Unified Power Quality Conditioner in distribution side in one feeder network has made it possible to mitigate the following problems effectively. Interline Unified Power Quality Conditioner which is installed between two feeders is its one of the advancement .The controlling algorithm determines the production of controlling signals which is used by the Voltage Source Converters for the generation of their gating signals. The variation of performance of the device occurs with the different controlling algorithms .This paper proposes the usage of Synchronous Reference Frame Controlling algorithm for the gate signal generation and the usage of modified PLL for better performance. Due to the effective usage of fuzzy controller based on PSO algorithm in the series side of the device make it more advantageous than other commonly used controllers. The main power quality issues we concentrate upon relates to reactive power compensation, harmonics elimination and neutral current elimination. The output has been plotted in MATLAB/SIMULINK.