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Comparative Study of SPWM & SVPWM Based Three Phase Voltage Source Inverter for an Ups System Operating Under Non Linear Loads

M A Wajid Mudassir, Mohammed Ismail.B, Mohammad Haseeb Khan, Arshia Azam

This research paper present the design, comparison of two different PWM techniques i.e. The sinusoidal PWM (SPWM) technique, and the space vector PWM (SVPWM) technique for three phase uninterruptible power supply (UPS) systems that are operating under nonlinear loads. First a model for Sinusoidal PWM is made and simulated using Matlab/Simulink software and its performance is compared with Space vector PWM. Matlab/Simulink is used to analyse, design & develop, the controller of the inverter. The controller is designed & compared by discussing their ease of implementation and by analysing the output harmonic spectra of various output voltages poles voltages, line to neutral voltages, and line to line voltages Power factor (PF) & their Total harmonic distortion (THD). Designing of the controller adds inner loops to the closed loop control system effectively that enables successful reduction of harmonics and compensation of distortion at the outputs. The performance is simulated using a three phase 10 kVA UPS Systems under all types of load conditions.