Advanced Switching Technique based High Frequency Magnetic Linked Asymmetric Multistring Inverter with Reduced THDs

摘要

This paper suggests an advanced modulation technique for the enlargement of the performance of high frequency magnetic linked asymmetric multi-string multilevel inverter. This proposed modulation technique enhances the output voltage quality by reducing total harmonic distortion. Moreover, it reduces the switching losses and enhances the efficiency of the power inverter. To ensure quality performance, recently published PWM and Proposed PWM topologies are used for this multilevel inverter having a carrier frequency of 1-5 kHz and a modulation index of 0.8-1. The total work is verified by using the MATLAB/Simulink software. From the simulation results and comparative study, the advanced switching technique is advantageous compared to all the other topologies for the modulation index 1. Also for all frequency modulation indexes, the proposed topology offers better results. The proposed technique lessens almost 20.80 %, 33.78 %, and 33.33 % of THD than the third harmonic injected thirty-degree bus clamping PWM (THTDBCPWM), conventional space vector pulse width modulation (CSVPWM), and third harmonics injected pulse width modulation (THPWM) technique respectively. The switching losses of the proposed switching technique are lower than all other techniques and almost 2.58 % less to the THPWM. The proposed technique has extraordinary potentiality for industrial applications and a sustainable solar PV system.