IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 05 Issue: 01 | Jan-2016, Available @ http://www.ijret.org 44 SIMULATION OF PHOTOVOLTAIC SYSTEM CONNECTED WITH FULL BRIDGE INVERTER USING MATLAB / SIMULINK Anwarul M Haque 1 , Swati Sharma 2 , Devendra Nagal 3 1 Assistant Professor, Power Electronics Department, Vishwakarma Government Engineering College, Chandkheda, Ahmedabad, Gujarat, India 2 Associate Professor, Electrical Engineering Department, Jodhpur National University, Jodhpur, Rajasthan, India 3 Assistant Professor, Electrical Engineering Department, Jodhpur National University, Jodhpur, Rajasthan, India Abstract When sunlight shines on a PV cell, the absorbed light produces electricity. Though PV technologies use both direct and dispersed sunlight to create electricity, harnessing efficiency is 68% eventually against the claim of 85% by the various manufacturers worldwide. Power Electronics Interface are incorporated with Photovoltaic (PV) System to intensify the efficiency of the PV system and undoubtedly we have reached to the goalmouth. There are two stages where power electronics converter are used. First DC-DC converter stage in which lower level PV voltage is boosted-up at the required higher level; and second DC-AC inverter stage in which increased DC link voltage is efficiently converted into AC. Purpose of this paper is to elaborate the Full- Bridge inverter used in PV System and switching schemes adopted for the operation and to realize the best switching scheme. Simulation results are taken at various stages to visualize the effect of interface. For whole PV system simulation, PV module is connected to the converter system. The output of the Buck Boost converter is connected to the single-phase inverter and the inverter output is fed to the AC grid. Key Words: H- Bridge Inverter, Switching Scheme, PV module, Converter, Simulink block-sets. --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION For developing countries, providing energy to its stakeholders in an efficient and cost effective manner is a highly challenging task. In spite of significant harnessing of the fossil fuel reserves, the breach between supply and demand of energy is ever growing. One of the possible options to tie this breach is by making extensive use of solar power [4]. The need for a clean surroundings and the incessant increase in energy demand makes decentralized renewable energy production more and more substantial [4]. Photovoltaic generate electric power when illuminated by sunlight or artificial light. It directly convert the sun's energy into electricity which can be easily transported and converted to other forms for the benefit of society [16]. Though PV technologies use both direct and dispersed sunlight to create electricity, harnessing efficiency is 68% eventually against the claim of 85% by the various manufacturers worldwide. Power Electronics Interface are incorporated with PV System to intensify the efficiency of the PV system and undoubtedly we have reached to the goalmouth. Power Electronics is the field of engineering which deals with the use of electronics for the conversion, control and conditioning of bulk electrical power. It also plays an important role in the solar system [11], [12], [13], [15]. There are two stage where power electronics converter are used. First DC-DC converter stage in which lower level PV voltage is stepped-up at the required higher level [24]; and second DC-AC inverter stage in which boosted DC link voltage is converted into AC [17], [18]. If Maximum Power Point Tracking (MPPT) is accountable for optimizing the efficiency of the photovoltaic system, power electronics interface is the solver. The power loses incurred at the converter stage is reimbursed at inverter stage. This proposed PV module gives the maximum power, voltage and current independent of the load. 2. DC-AC INVERTER STAGE The power produced by a PV module is in the form of direct current. Conversion of direct current to alternating current required by many common appliances and for grid- connection is realized with an inverter. Inverter is basically an interface between photovoltaic cell and AC grids. There are several inverter topologies but output current distortion and efficiency are the two key parameters for the selection of inverters. Power inverters produce one of three different types of wave output [1] [2] [3] [4].  Square Wave  Modified Sine Wave  Pure Sine Wave Based on their operation the inverters can be broadly classified into  Voltage source inverter (VSI)  Current source inverter (CSI) The output voltage waveform of Voltage Source Inverter are independently controlled and mostly remain unaffected by the load. Due to this phenomenal behavior, the VSI have many industrial applications such as adjustable speed drives and also in Power system for FACTS (Flexible AC