A Random PWM with Constant  Common-Mode Voltage for PV Inverter

R. Ganesh Kishore; D. Thalapathi Udhayakumar

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25-Sep-24

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A Random PWM with Constant Common-Mode Voltage for PV Inverter

Author(s):

R. Ganesh Kishore , christian college of engineering and technology, oddanchatram, India; D. Thalapathi Udhayakumar, christian college of engineering and technology, oddanchatram, India

Keywords:

Random Pulse Width Modulation (RPWM), constant common-mode voltage, Total Harmonics Distortion (THD)

Abstract:

This paper presents a Random Pulse Width Modulation (RPWM) full bridge transformer-less photovoltaic inverter technique brings low Total Harmonics Distortion (THD). In better elimination of THD induced by the common-mode voltage, a clamping technology has the ability to hold the common-mode voltage on a constant value in the freewheeling period. The passive clamping technology consists of two diodes and a capacitor divider at the dc side of full bridge inverter topology of constant common-mode voltage (FB-CCV). RPWM technique is fed into FB-CCV. MOSFET switches are been employed in ac side because of its low switching losses. RPWM is a new and effective technique which possesses low acoustic noise and mechanical vibrations and it is suitable for many applications such as industrial motor drives and electric vehicles in which interference with neighboring equipment and environment is minimized. The performance of this modulation is simulated in Plexim/Simulink environment, to measure the THD and the results are obtained.