Photo Voltaic Peak-power Tracker Using a Square- Wave Inverter

Energy conversion from PV arrays received a lot of attention, especially in outer-space power system applications. Different methods of peak-power tracking have been proposed to capture the maximum power at different levels of insulation. Many peak-power trackers are implemented with a microprocessor or microcontroller, by using different control strategies. Water pumping from a PV array is a valid option to pollution-generating diesel and human-powered water pumps. However, with the battery module, the battery needs to be checked regularly. In the system with a battery, the peak power tracking can be handled by varying the duty ratio of a dcdc converter, which is generally installed between the battery and the PV array. But in this paper we are not using battery. We are generating the power from PV module and by using MPPT feeding power to the induction by an inverter. INTRODUCTION The fuel consumption is increase day by day is the major problem in the world. So by utilizing some natural renewable energy we can resolve the problem and along with we can protect the environment related to warming and damage ecological. Due to this we need to increment the utilization of renewable energy in the environment, there are so many renewable energy in the environment. Solar energy is obtainable by using photovoltaic module. But the insolation and temperature of the panel change in the same day itself so we have to use some technique by that maximum power can be obtained and utilize it with minimum losses. So if the load is an induction motor by using integrated inverter DC voltage can be converted into AC with minimum losses . For conversion of DC to AC in inverter circuit we need firing pulse to trigger the switches so by using MPPT we are generating pulse so that obtained output should be maximum. INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY [IJIERT] A PV system is very popular because of their matching l system there are total four stage to the complete process. In first stage generation of DC takes place in the second stage generation of gate signal in third conversion of DC into AC and finally induction motor to the load. Fig.1 PV system with MPPT, inverter and load. Main focus here on the conversion of DC into AC with maximum power point tracking. The control of the system is more complicated than that for the system with a dc battery on the dc bus. The block diagram of the system is shown in fig.1. The PV array receives energy from the sunlight. The PV array generates electric power, which is fed to the induction motor via an inverter. The induction motor is mechanically coupled to the water pump. As the insolation level varies during the day, the output of the PV array follows the change. The water pump is a centrifugal pump, with the output torque varying as the square of its output of the water pump, the speed of the water pump is increased by adjusting the frequency of the inverter. The solar PV power is mostly suitable for stand load . The centrifugal pump has parabolic torque load characteristics water pumping application in domestic, agricultural and industrial sectors. So, it will be a better option to use the solar PV power for water pumping application. This encourages on electric motor-pump integrated with PV system, with better performance and efficiency. power fed D.C motors are already in use for water pumping application. Fig.2 insolation and temperature effect NOVATEUR PUBLICATIONS VOLUME 2, ISSUE 4, APR. oad characteristics application rotor speed. To increase the -alone system which drives a parabolic torque which are mostly used for ISSN: 2394-3696 -2015 2 | P a g e . In this