45 Dr.R.SEYEZHAI, Nithya, Pridhivi, R Srinivasan International Journal of Electronics, Electrical and Computational System IJ EECS ISSN 2348-117X Volume 3, Issue 3 May 2014 REVIEW OF UNCOUPLED, COUPLED INDUCTOR AND RCN BASED TWO-PHASE INTERLEAVED BOOST CONVERTER FOR PHOTO-VOLTAIC APPLICATIONS Nithya Subramanian*,Pridhivi Prasanth*,R Srinivasan*, Dr.R.Seyezhai** & R R Subesh* t*UG Students, Departmen of EEE, SSN College of Engineering, Chennai **Associate Professor, Department of EEE, SSN College of Engineering, Chennai Abstract Photo-Voltaic application basically converts direct sunlight into electricity without causing any harmful environmental pollution and any moving parts. These are superior in comparison to the conventional sources like fossil fuels to satisfy world’s energy demands and so has a wide variety of applications. Different DC-DC converter topologies have been proposed in the literature but Interleaved Boost Converter (IBC) is widely used for photovoltaic generation due to its high power density and fast dynamic response. This paper presents a comparative study of uncoupled, coupled inductor and Ripple Cancellation Network (RCN) based IBC for photo-voltaic applications. IBC is more efficient than a conventional boost converter as it reduces the input current ripple, output voltage ripple and the component size and improves the transient response. Adding the Ripple Cancellation Network to the conventional IBC converter, minimizes the input current and output voltage ripple. The parameters that will help us decide the performance of the proposed converters are input current ripple and output voltage ripple. Simulation studies are carried out in MATLAB to verify the theoretical results. Keywords:Coupled inductor, interleaved boost converter, photovoltaic, ripple cancellation network. 1 Introduction Photo-voltaic is an efficient method that captures energy from direct sunlight and transforms it into electricity. Photo-voltaic applications can be grouped into utility interactive applications and stand-alone applications. Utility interactive applications provide a backup system to make sure that the electricity is available all throughout the year irrespective of the weather conditions. Another important application of PV is in stand-alone systems. They do not have the utility connection. Direct system which uses electricity where it is produced is a good example of stand-alone systems. However, to cater to the energy demands during the non- sunny period PV-charged battery storage system is used. PV serves as an ideal source for meeting mobile and remote lighting requirements using the availability of low power DC lighting, such as low pressure sodium and fluorescent lights [1]. This paper basically presents the three converter topologies - Uncoupled Interleaved boost converter, Coupled inductor Interleaved boost converter and Inter-leaved boost converter with ripple cancellation network. It compares the performances by reducing the input current ripple, output voltage ripple and the passive component size. In conventional IBC, to make the input current ripple minimum, the inductor size increases adding to the converter weight. These shortcomings can be overcome by using the second and third converter topologies. Interleaved parallel structure has been applied in many power density applications so as to reduce the input current ripple because of its frequency doubling characteristic, output voltage ripple, passive