• Deepshikha Singla
• Parsh Ram Sharma

Cascaded Multilevel Inverters with isolate DC source have proven to be extremely beneficial in medium voltage and high-power applications. Using fundamental switching technique for control and modulation of multilevel inverter minimizes power losses to a great extent. This paper proposes Cuckoo Search Algorithm (CSA) for determining the switching angles for optimal minimization of THD and power losses. The optimized switching angles are further used to generate the gating pulses for driving the switches of the multilevel inverter. The proposed technique is tested using 11-level cascaded H-Bridge inverter in the MATLAB/Simulink working platform. The effectiveness of the proposed Cuckoo Search Algorithm based switching scheme is evaluated by comparing the content of harmonics present in output voltage of the multilevel inverter using Sine Pulse Width Modulation (SPWM). The results indicate that switching angles obtained using CSA effectively minimize a number of specific harmonics, thus resulting in low THD with minimized power losses.

Cascaded H-Bridge Multilevel inverter, Cuckoo Search Algorithm, Harmonics, Total Harmonic Distortion, Power Losses, Pulse Width Modulation

"OPTIMAL MINIMIZATION OF THD AND LOSS ANALYSIS IN MULTILEVEL INVERTER USING CUCKOO SEARCH ALGORITHM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.1104-1110, August-2018, Available :http://www.jetir.org/papers/JETIRA006192.pdf

"OPTIMAL MINIMIZATION OF THD AND LOSS ANALYSIS IN MULTILEVEL INVERTER USING CUCKOO SEARCH ALGORITHM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp1104-1110, August-2018, Available at : http://www.jetir.org/papers/JETIRA006192.pdf