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Browsing Project Reports by Author "ABHIJEET, SINHA"

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    Photovoltaic Array Based Power Generation System using Nine Level Inverter
    (2017-08-24T05:05:35Z) AYUSH, SEN; PRIYANKA; ABHIJEET, SINHA; ANAND, RAJ
    Now days, there is a large scarcity of electric energy in our world and at the same time the demand is also increased. Many distributed power system have been developed to meet this high demand by using renewable energy resources like solar systems, wind energy systems and other distributed energy resources. Photovoltaic technology currently being the most popular solar power technology gives rise to a reliable DC power generation source. The solar energy is becoming more important because it produces less pollution. The cost of fossil fuel is increasing, while the cost of solar arrays is decreasing. Recently small capacity distributed power generation systems using photovoltaic energy may be widely used in residential applications. Photovoltaic system is interconnected to a grid through two power stages, dc-dc converter and dc-ac converter. Power electronic converters, especially dc/ac PWM converters have been extending their range of use in industry because they provide reduced energy consumption, better system efficiency, improved quality of product, good maintenance and so on. The output voltage of a PV array is low; a dc–dc power converter is used in a solar photovoltaic system to boost the output voltage. It should be insure that there is no waste of the energy generated by the PV array because of the important of power conversion efficiency of the power conversion interface. There are mainly two power losses such as conduction losses and switching losses. Conduction loss is due to the use of active devices, and the switching loss is proportional to the voltage changes and the current changes for every switching and switching frequency. For a multilevel inverter, the voltage change in each switching operation is reduced for improving its power conversion efficiency and the switching stress of the active devices.