IJIRST –International Journal for Innovative Research in Science & Technology| Volume 1 | Issue 6 | November 2014 ISSN (online): 2349-6010
Implementation Soft Switching Bidirectional DCDC Converter For Stand Alone Photovoltaic Power Generation System M Swami Nathan. M.E Student Department of electronics and electrical engineering Sri lakshmi ammaal engineering college, Chennai 73
R Rajasakeran. Assistant Professor Department of electronics and electrical engineering Sri lakshmi ammaal engineering college, Chennai 73
Abstract In this paper hybrid storage system is proposed for the transient load management. Battery act as a primary source and supercapacitor act as a secondary source. This hybrid system is controlled by the canonical switching system designed in this converter. This proposed converter is derived simply adding switches in each leg. Zero voltage source is achieve for all the switches, by placing inductor in front of each switches. In this topology two unidirectional and two bidirectional power flow has designed for manage the power balance for this system. Circuit analysis and design consideration are proposed by the MATLAB modeling. Simulation results has verify by the close-loop design and confirm its ability to achieve independent control over power flow. The proposed converter reduced the component losses for to harvest from the renewable energy. Keywords: multi-input converters, battery, supercapacitor, ZVS, fuzzy controller. _______________________________________________________________________________________________________
I. INTRODUCTION In all the counters, renewable energy based single energy storage system implementing for transient load demand. Due to this system indirectly increases the component cost and also reduces the overall efficiency of the system. Major drawback of SSS based standalone renewable energy systems are not suitable for transient load conditions. Bidirectional DC – DC converter is designed to power management between supercapacitor, battery, source and load. Control and power management algorithm is developed based on the load voltage. Where supercapacitor, batteries are connected to bidirectional port and source to load are connected to the unidirectional port. Storage devices SCs and batter are used for smoothing the power output, improving startup transitions and dynamic characteristics, and enhance the transient power capacity. So they are best placed in applications where high power levels are needed during a short period of time, from milliseconds to few hundreds of seconds. In this hybrid storage system has the ability to provide high quality and high efficient power. Traditional converters are replaced into multi-input converter (MIC), which combines different power sources in a simple power structure. This converter has providing the centralized control, bidirectional power flow for the storage element, high reliability, and reduce cost and size. The pulsating voltage source is supplied as a input for MICs. Besides, a systematic method to synthesize MICs is proposed. MIC has the ability to operating in different converter topologies and directional operation without any additional transformer.
SOLAR PANNEL
SCAP
CONTROLLER
DC/DC BIDIRECTIONAL CONVERTER
SINGLE SOURCE MULTILEVEL INVERTER
BATTERY
AC LOA D
All rights reserved by www.ijirst.org
298