New Hepwm Optimization In Three Ohase Inverter

Nor Azizah, Mohd Yusoff (2012) New Hepwm Optimization In Three Ohase Inverter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is represent New Harmonic Elimination Pulse Width Modulation (HEPWM) methods to the control of high power voltage-source inverter, where the main concerns are about the application of differential evolution to obtain switching angle until for higher harmonic order. Problem statement: PWM waveform have harmonic at low frequency. Differential evolution is one of method regarding to provide lower total harmonic distortion to generate highest quality output by calculate the accurate value of switching angle. Approach: It consists of four basic in Differential Evolution which is starting by initialize the population of switching angle. Then it proceed by mutation, recombination and lastly is selection. The objective function of the DE is designed to minimize (to near zero) the selected harmonic and at the same time allow for the fundamental component of the output voltage to be controlled independently. In this project, MATLAB Simulink programming is use to find suitable switching angle using differential evolution (DE) algorithm in order to drive VSI and to verify the eliminating number of harmonic through amount of Total Harmonic Distortion (THD) until higher harmonic order. Result: The result can be proving in order to accomplish this project through the reduction of distortion which can observe through the Total of Harmonic Distortion by MATLAB from the output of phase voltage and line voltage. The value of switching angle can be observed through the trajectories waveform certain harmonic order. Conclusion: So, this report are successfully explain the term of algorithm of Differential Evolution that has been used in order determine the value of switching angle that will be used to obtained the good quality of output.

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