摘要：AbstractThe scarcity of fossil fuel in near future drove the researchers in integrating renewable energy sources with existing grid network. Among all the renewable energy sources, Photovoltaic (PV) system has its firm position in the heart of the research in power engineering owing to its advantages over the other alternatives. For connecting PV system with the grid, Cascaded H-Bridge (CHB) Multilevel Inverter (MLI) is generally preferred over conventional topology due to its isolated DC source provision. But due to the large size, cost, weight of CHBMLI, the researchers have moved to design Reduced Switch MLI (RSMLI). In line with these PV applications, a 5 level RSMLI topology has been proposed as a maiden application for solving the problem of interfacing the PV system with the grid. Moreover, the optimized firing angles for the RSMLI can be used to improve the output power quality, low value of percentage Total harmonic Distortion (THD) of the output voltage and current. In this proposed work, a grid tied PV model is used where an Islanding Switch (IS) is used for isolation of the load with PV system from the rest of the network. Three popular Maximum Power Point Tracking (MPPT) techniques i.e. the Perturb and Observe (PO), the Particle Swarm Optimization (PSO) and the Levy Flight based Cuckoo Search (LFCS) are tested and compared for extracting maximum power from the proposed system under Partial Shading (PS). Simulation results show the superiority of the LFCS techniques as MPP tracker in this work.
关键词：KeywordsIslanding ModeLevy Flight based Cuckoo SearchMultilevel InverterPhotovoltaic SystemTotal Harmonic Distortion
