The Analysis Of Grid Interconnected System At Distribution Level Using Renewable Energy Resources

ABSTRACT There is growing interest in renewable energy around the world. Since most renewable sources are intermittent in nature it is a challenging task to integrate renewable energy resources into the power grid infrastructure. Distribution systems provide standby service during utility outages and when operated during peak load hours potentially reduce energy costs. This paper presents a grid interfacing inverter that compensates power quality problems and it can also interface renewable energy sources with the electric grid. The grid interfacing inverter can effectively be utilized to perform following functions such as transfer of active power harvested from the renewable resources load reactive power demand support current harmonic compensation at PCC and current unbalance and neutral current compensation in case of 3-phase 4-wire system. Hysteresis current control method is used to generate gate pulses. Total Harmonic Distortion of the grid connected system is analysed. The grid interface inverter configuration with IGBT is designed and the graphic models of the Grid Interfacing inverter are developed.Total Harmonic Distortion of the grid connected system is analysed and it is reduced using Harmonic Current Extraction Method using SRF theory are done using MATLABSIMULINK.