Journal Title : International Journal of Modern Trends in Engineering and Science
Volume 03 Issue 06 2016
ISSN no: 2348-3121
Page no: 133-138
Abstract – Converters are used in the utility interface of renewable energy system to reduce harmonic contents in line current/voltage and to increase reliability. These converters suffer from high level of Total Harmonic Distortion (THD) in the utility line currents/voltages which creates a lot of problems in the power system. In this paper harmonics are reduced by pwm technique and selected harmonic elimination technique. Pulse width modulation (PWM) is a powerful technique for controlling analog circuits with a processor’s digital outputs. PWM is employed in a wide variety of applications, ranging from measurement and communications to power control and conversion. Selective harmonics are eliminated to reduce the THD, that is, the problem is to determine optimal switching angles for eliminate harmonics while maintaining the required fundamental currents/ voltages. The THD reduction is achieved by the help of multilevel inverter equal separate dc sources using particle swarm optimization.
Keywords— Inverter, PWM, THD, pso
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