Ecology, Environment and Conservation Paper

POWER QUALITY IMPROVEMENTS IN DISTRIBUTION LEVEL INTERCONNECTION OF RENEWABLE RESOURCES CONTROLLED BY DSP & ULTRA-CAPACITOR LINK

R. Srinivasan and R. Arulmozhiyal

Abstract

Due to disperse nature of renewable energy resources (RES), electricity generation is often taking place in small scale but main drawback is power quality. So to improve power quality issues, integration of renewable energy into the utility grid can be done either at transmission level or the distribution level depending on the scale of generation. The renewable resources are interconnecting using various power electronics converters. Generally voltage source inverters are used to interface the intermittent RES in distributed system. This paper presents integration of solar energy and wind energy resources for distribution level using Four leg inverter and its control strategy to achieve the voltage profile of system. Usually, the photovoltaic energy sources generate power at variable low dc voltage, while the variable speed wind turbines generate power at variable ac voltage. Thus, the power generated from these renewable sources is interconnect using various converters before connecting on dc-link. The voltage source inverter is a key element of a distributed generation system as it interfaces the renewable energy source to the grid and delivers the generated power. This concept of interconnection of solar and wind energy is designed and simulated in MATLAB-Simulink for non-linear load.