International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 04 | Apr -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 834 GRID INTERFACED RENEWABLE ENERGY SOURCE TO IMPROVE POWER QUALITY USING SAPF V. Manimegalai 1 , N. Senthilnathan 2 , M. Sabarimuthu 3 1 PG Scholar, Dept of EEE, Kongu Engineering College, Tamilnadu, India 2 Professor, Dept of EEE, Kongu Engineering College, Tamilnadu, India 3 Assistant Professor, Dept of EEE, Kongu Engineering College, Tamilnadu, India ---------------------------------------------------------------------***------------------------------------------------------------------- Abstract –The living standard demands excessive power from utility due to increasing population and depletion of fossil fuel resources. These issues leads to develop a new sources of energy ie, Renewable energy sources (RES). RES connected to the distributed system is termed as distributed generation (DG), which leads to power quality (PQ) issues such as distortion, irregularity unbalance etc. More usage of power electronics devices with renewable energy sources may reduce quality of power by injecting harmonics in the line. The power quality problem can be overcome by grid interfaced inverter control which compensates the PQ issues while integrating REU. The grid connected with renewable energy source has the capability of injecting active power to the grid, reduces source current distortion and reactive power compensation. Key Words: Renewable Energy, Distributed Generation, Power quality, shunt Active filter 1. INTRODUCTION The living standard of energy demand increases day by day due to overgrowth of population. The fossil fuels is burned and supplied in order to cope up with this energy demand. But the usage of fossil fuels leads to air pollution, global warming etc. The extensive use of fuels increases the cost, as well demands in future. This makes to look over the alternate source ie., Renewable energy sources as the future energy solution for distributed generation. This paper represents the effective solution of shunt active power filter for eliminating the harmonics to maintain the quality of utility power supply. Passive filters are traditionally used but it has the major drawback which leads to resonance problem and poor dynamic performance. Active power filters gives best solution compared to conventional passive filters for the mitigation of harmonic and reactive power disturbance . Active power filters is the device which generate the same amount of harmonic as generated by the load but 180° phase shifted. The harmonics inserted into the line are eliminated and utility supply become sinusoidal. RES is not connected directly to the grid instead it is connected to the grid interfaced inverter. DC link voltage capacitor is connected to grid interfaced inverter which play important role transferring the active power from RES to grid. Based on the control techniques, the inverter act and inject the compensating harmonics current. Fig -1: Basic shunt active power filter In figure1 shows that IGBT-based voltage source inverter (VSI) bridges with a common DC bus capacitor were used as the shunt active filter(SAF). In [1], Abhayrajsinh J. Rana et al. discussed the mitigation of voltage sag by injecting reactive current at PCC using Distribution Static Compensator (DSTATCOM). In [2], Rivas D et al. proposed hybrid scheme is able to compensate displacement power issue and current harmonics at the same time. In [3], Utkal Ranjan Muduli et al. proposed a unique reference