Bonfring International Journal of Power Systems and Integrated Circuits

Online ISSN: 2277-5072 | Print ISSN: 2250-1088 | Frequency: 4 Issues/Year

Impact Factor: 0.651 | International Scientific Indexing(ISI) calculate based on International Citation Report(ICR)

Single Phase Seven Level Stand Alone Inverter for Photovoltaic System

N. Shanmugavadivu and T. Annamalai

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Abstract:

Solar Energy is one of the favourable renewable energy resources and the multilevel inverter has been proven to be one of the important enabling technologies in photovoltaic (PV) utilization. Photovoltaic (PV) power systems are getting more and more widespread with the increase in the energy demand and the concern for the environmental pollution around the world. This paper proposes a single phase seven level stand alone inverter for photovoltaic systems, with a multi reference pulse-width modulated (PWM) control scheme. Three reference signals that are identical to each other with an offset that is equivalent to the amplitude of the triangular carrier signal were used to generate the PWM signals. The inverter is capable of producing seven levels of output voltage from the dc supply voltage. With multilevel inverters harmonic content gets reduced and with more levels the output approaches the sine wave. The voltage stress also gets reduced. This work presents simulation of single phase seven level inverter for stand alone applications.

Keywords: Multilevel inverter (MLI), Photovoltaic (PV) System, Pulse-Width Modulated (PWM), Total Harmonic Distortion (THD)

Volume: 2 | Issue: Special Issue on Communication Technology Interventions for Rural and Social Development

Pages: 49-53

Issue Date: February , 2012