International Journal of Engineering Research-Online A Peer Reviewed International Journal Email:editorijoer@gmail.com http://www.ijoer.in Vol.4., Issue.4., 2016 (July-August) 52 B.LATHA MADHURI, D.V.N. ANANTH, Y. NAVEEN KUMAR 1. INTRODUCTION Solar power is the conversion of sunlight into electricity using photovoltaic (PV), which converts light into electric current using the photoelectric effect. India is located in the equatorial sun belt of the earth, thereby receiving abundant radiant energy from the sun [3].The India Meteorological Department maintains a nationwide network of radiation stations, which measure solar radiation, and also the daily duration of sunshine [5]. In most parts of India, clear sunny weather is experienced 250 to 300 days a year [4]. The annual global radiation varies from 1600 to 2200 kWh/m 2 , which is comparable with radiation received in the RESEARCH ARTICLE ISSN: 2321-7758 PERFORMANCE OF SOLAR PV SYSTEM WITH BATTERY BACKUP FOR UNINTERRUPTED LOADS AND COMPENSATION FOR UNBALANCED AND DISTORTED LOADS B.LATHA MADHURI 1 , D.V.N. ANANTH 2 , Y. NAVEEN KUMAR 3 1,2,3 VITAM College of Engineering, Visakhapatnam, India ABSTRACT A simple and cost effective control technique has been proposed for MPPT from the photovoltaic array under varying climatic conditions (Irradiance w/m2 of the photovoltaic). This paper proposes an energy system combing solar photovoltaic with battery backup as a small-scale alternative source of electricity in rural areas. The proposed system is an attractive owing to its simplicity, ease of control and reliability. The paper also discusses about the in detail results for low and average irradiance cases are presented and analyzed in order to determine, how output power and other quantities are affected by changes in solar irradiance. In this, the solar cell is delivering power to both AC and DC loads with battery backup. The role of MPPT algorithm is to charge battery quickly, maximum utilization of solar power and also uninterrupted power supply when solar power fails. This solar PV system can be applicable to remote located industrial loads like heating, welding and small arc furnace type distorted loads and also for unbalanced loads. The PV inverter is designed such that it will maintain nearly constant voltage magnitude and can mitigate harmonics in voltage and current near the load terminals. The system performance is analyzed with and without MPPT algorithm, if failure in solar power how the system responds with and without battery backup were evaluated using MATLAB/ SIMULINK. The proposed technique shows that the inverter is effective for supplying uninterrupted load supplying, better performance during unbalanced and distorted loads. The proposed technique is having very less voltage and current harmonic content and can maintain nearly constant voltage profile for highly unbalanced system. Keywords: Solar photovoltaic, buck-boost dc-dc converter, maximum power point tracking, solar irradiance, AC and DC loads, Lithium-ion battery. ©KY Publications