Comparison of PWM Techniques and Selective Harmonic Elimination for 3-Level Inverter
نویسندگان
چکیده
In this paper comparison of Selective Harmonic Elimination (SHE) method with different Pulse Width Modulation (PWM) technique which are used as gate pulse for firing the IGBT‟s. Higher order harmonics are easily eliminated by selecting a proper tuned value filters but lower order harmonics such as 3rd, 5th, 7th, and 9th are not easily eliminated. This paper includes NewtonRapson method with random initial guess is used for SHE reduction and shows where the solution can exit by solving transcendental non linear equations. With the use of this method lower order harmonics as well as Total Harmonic Distortion (THD) will get reduce. In this paper a cascaded H-bridge Multilevel Inverter using MATLAB/Simulink blocks is presented. Keywords-Flexible AC Transmission System, Multilevel Inverter, Power Electronics, Selective Harmonic Elimination, SPWM-Sinusoidal Pulse Width Modulation
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