Abstract
Power converter is one of the essential elements for effective utilization of renewable power sources. This paper focuses on the development of a circuit simulation model for solar power maximum power point tracking (MPPT) evaluation with different buck-boost converter topologies including SEPIC, ZETA, and four-switch type buck-boost DC/DC converters. The circuit simulation model mainly includes three subsystems, namely, a PV emulator model, a buck-boost converter based MPPT system, and a fuzzy logic MPPT controller. A buck-boost converter based dual regulation (voltage regulation and current regulation) modes PV emulator is built to emulate the characteristics of the PV panel. The PV emulator is used to power the MPPT system. The MPPT system also contains a buck-boost power converter for power transfer. The maximum power point tracking function is achieved through proper control of the power switches of the power converter. A fuzzy logic controller is then developed to perform the MPPT function for obtaining maximum power from the PV panel. The MATLAB based Simulink piecewise linear electric circuit simulation tool is used to verify the complete circuit simulation model.
Highlights
Solar energy is the most abundant resource on Earth, and is expected to become one of the primary energy supply resources in the future [1,2]
This paper presents the development of a circuit simulation model for maximum power point tracking (MPPT) evaluation of solar power that involves using different buck-boost converter topologies including single-ended primary-inductor converter (SEPIC), Zeta, and four-switch type buck-boost DC/DC converters
Circuit simulations for the complete buck-boost converter-based MPPT systems using SEPIC, Zeta, and four-switch type converter topologies were successfully verified in the MATLAB/Simulink PLECS environment
Summary
Solar energy is the most abundant resource on Earth, and is expected to become one of the primary energy supply resources in the future [1,2]. A power converter for maximal power point tracking (MPPT) and voltage or current regulation is inserted between the solar cell panel and the load to control power flow This power converter directly affects the efficiency and performance of the solar power management system. To maximize the use of available solar power drawn from the solar panel and to widen the applications of solar energy, several studies have investigated the design and applications of buck-boost converters [3,4,5,6,7]. We conducted a comparative study for MPPT evaluation by using different buck-boost converter topologies through circuit simulation, including Zeta, a single-ended primary-inductor converter (SEPIC), and four-switch type synchronous buck-boost converters. Circuit simulations for the complete buck-boost converter-based MPPT system were successfully verified in the MATLAB/Simulink PLECS environment
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