39 International Journal for Modern Trends in Science and Technology Renewable Energy Resources Interfacing to Grid at Distribution Level Using I d -I q Current Control Strategy for Power Quality Improvement D.Surya Teja 1 | K.Lakshmi 2 | K.Manoz Kumar Reddy 3 1 PG Scholar, Department of EEE, Aditya College of Engineering, Surampalem, Andhra Pradesh, India. 2 Sr.Assistant Professor, Department of EEE, Aditya College of Engineering, Surampalem, Andhra Pradesh, India. 3 Professor & Head, Department of EEE, Aditya College of Engineering, Surampalem, Andhra Pradesh, India. To Cite this Article D.Surya Teja, K.Lakshmi and K.Manoz Kumar Reddy, DzRenewable Energy Resources Interfacing to Grid at Distribution Level Using Id-Iq Current Control Strategy for Power Quality Improvement dz, International Journal for Modern Trends in Science and Technology, Vol. 03, Issue 09, August 2017, pp.-39-45. Electric utilities and end users of electric power are becoming increasingly concerned about meeting the growing energy demand. Urbanization and industrialization have changed the lifestyle of human society and the need for electrical energy has enhanced significantly. As the conventional energy sources are not capable of serving the purpose, the researchers have turned their face towards Renewable Energy Sources (RES). Energy sources are scattered across the globe, therefore the available green energy at the distribution level is also used to generate electricity. The hybrid combination of wind/solar systems has proved to be a reliable source to the utility. For extracting maximum power from the RES, battery bank is connected across it. Due to the problem associated with the chemical batteries the wind/solar hybrid combination is directly connected to the grid. There are many issues related to the interconnection of RES to the grid which are addressed with the growth in power electronics field. However the power quality issue occurs due to the presence of non-linear loads at the point of common coupling . Shunt active filter has proved to mitigate the problems associated with the non-linear loads. Researchers have limited their work to interconnection of RES to ideal grid voltages which is not the practical case. In this paper the wind/solar hybrid system is modeled and is interconnected to the unbalanced and distorted grid. Also, RES interfacing inverter is added with shunt active filter functionality and hence overall cost curtailment of the project can be achieved. Keywords: renewable energy; wind-solar hybrid system; grid integration; shunt active filter; power quality; unbalanced and distorted grid. Copyright © 2017 International Journal for Modern Trends in Science and Technology All rights reserved. I. INTRODUCTION Electric utilities and end users of electric power are becoming increasingly concerned about meeting the growing energy demand. Seventy five percent of total global energy demand is supplied by the burning of fossil fuels. But increasing air pollution, global warming concerns, diminishing fossil fuels and their increasing cost have made it necessary to look towards renewable sources as a future energy solution. Since the past decade, there has been an enormous interest in many countries on renewable energy for power generation. The market liberalization and government’s incentives have further accelerated the renewable energy sector growth. Renewable energy source (RES) integrated at distribution level is termed as distributed ABSTRACT International Journal for Modern Trends in Science and Technology Volume: 03, Issue No: 09, September 2017 ISSN: 2455-3778 http://www.ijmtst.com