Grid-Connected Modular Cascaded H-Bridge Multilevel PV Inverter Using Fuzzy Logic Controller
نویسندگان
چکیده
In this paper, the principle of modularity is used to derive the different multilevel voltage and current source converter topologies by fuzzy logic controller. The paper is primarily focused on highpower applications and specifically on high-voltage dc systems. The derived converter cells are treated as building blocks and are contributing to the modularity of the system. The modular cascaded multilevel topology helps to improve the efficiency and flexibility of PV systems by Fuzzy Controller. To realize better utilization of PV modules and maximize the solar energy extraction, a distributed maximum power point tracking control scheme is applied to both singleand three-phase multilevel inverters, which allows independent control of each dc-link voltage. For three-phase grid-connected applications, PV mismatches may introduce unbalanced supplied power, leading to unbalanced grid current. To solve this issue, a control scheme with modulation compensation is also proposed. An experimental three-phase seven-level cascaded Hbridge inverter has been built utilizing nine Hbridge modules (three modules per phase). Each Hbridge module is connected to a 185-W solar panel. Simulation and experimental results are presented to verify the feasibility of the proposed approach by Fuzzy Logic Controller.
منابع مشابه
A Grid Connected Pv System Integrated through Multilevel Modular Cascaded H-bridge Inverter by Using Fuzzy Logic Controller
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