Harmonic Reduction in Two-level Power Inverter using Enhanced-Direct Current (DC) Based-Modulation Technique

Abstract

Harmonic reduction in a two-level power inverter using an enhanced-direct current (dc) based modulation technique is presented in this paper. A buck-boost power inverter is the test system used in this study with an enhanced-DC-based based-modulation technique. In this research, an enhanced-based modulation technique is made up of negative bias-rectified sinewave signals and triangular wave signals. The negative rectified-bias sinewave and carrier wave modulation techniques are compared to produce firing signals for triggering the DC-DC buck-boost power switch. The anticipated system is exceptional because the triggering signals for switching the DC-DC power section generated positive trains of signals with two exclusive sections that handle both the higher and lower harmonics distortions concurrently unlike conventional techniques. The overall AC voltage output of the system produces 323.5V 50Hz pure sine wave with THD of 0.1072% and AC of 5.97A with THD of 0.0521% as well as efficiency of 96.68%. The proposed system experimental work was carried out.