POWER QUALITY CONTROL & ECONOMIC OPERATION IN PV-BESDG IN AUTONOMOUS

Abstract

In this thesis, an autonomous renewable system which is backed-up by diesel generator is proposed which maintain the system’s economic performance and power quality within permissible limits of IEEE 519 standard. The system feeds Non linear loads, which will be primarily fed by Photovoltaic system in the presence of sun light and by battery energy storage, also there is diesel generator available which is operated in ON/OFF state,the generator will not be running in continuous mode, rather it will work in ON/OFF mode to maintain the system operation economic, Minimum fuel cost and maximum fuel efficiency will be obtained by maintaing the system free from harmonics which will be present in the presence of non linear load. Active filter system will be deployed to the system which will counter the unknown harmonics so that less reactive power and harmonicssustain in the system. The coordinated control among Bidirectional Buck-Boost converter and Voltage source controller will obtain the multiple objectives like maximum power point track (MPPT), battery state of charge (SoC),maximum fuel efficiency and minimum running cost while meeting the minimum critical load demands in the system.