Paper Key : IRJ************681
Author: Suhas P. Walde,Dr. D. R. Tutakane,Prof. Priyanka Deshmukh
Date Published: 03 Mar 2025
Abstract
Sun energy is abundantly available and coal energy is depleting fast at every level we are trying to utilize the electrical solar energy. Making use of it in various ways we are directly using it, we are converting into the heat and many other things. In this Project the Battery is charged continuously with Solar Panel or panels. The ratings of the Solar panel and battery are so chosen that a charge controller stage can be avoided to improve the efficiency of the solar charging system. A simple push-pull inverter using 246 MOSFETS IRF 150 have been fabricated initially to test the performance of the system for 150 W,230 V Quasi Square Wave Inverter to minimize the harmonics using 9V-0-9V240V, 50 Hz, Centre tap transformer is connected as shown in Fig. 1. Two 1800 phase shifted gate pulses are generated and fed to the two MOSFETs are alternately are provided from our control circuits shown in Fig.2 The reason behind selecting the 9V-0-9V AC at the low voltage side of a step-up transformer is because the fundamental component of RMS square wave 12 Volts 50 Hz AC is approximately 9 V 50 Hz. AC the Gate pulses with 100% duty ratio are shown in Fig. 3 The practical gate pulse controller have been fabricated using IC 555, IC 324 and IC 4017 to generate controllable variable Gate pulses with variable pulse width as shown in Fig.4. These pulses are generated either independently or in synchronized mode depending upon whether we wish to operate in stand-alone or grid connected mode. In Standalone mode Power is available even in absence of solar power due to energy stored during day time. In synchronized mode the power can be fed back to grid to minimize electric bills by using net metering. The Solar Power to be feedback to grid is be controlled by controlling phase shift and pulse width of the gate pulses from control circuit. Prototype working model is developed and tested.