一種新型軟開(kāi)關(guān)微型光伏逆變器的研究
[Abstract]:This paper mainly studies the micro photovoltaic inverter, which is mainly suitable for low voltage input such as photovoltaic board, battery, fuel cell and so on. Based on the comparison of the existing main topologies of low power single-phase photovoltaic inverters, a new type of isolated CUK soft-switching DC-DC converter with voltage source full-bridge inverter is proposed. The topology is verified by Matlab/Simulink simulation, and the preliminary selection of system parameters and the brief analysis of the working process are completed. Then, the corresponding experimental platform is built in the laboratory to verify it. The experimental results are in good agreement with the simulation results. In this paper, the typical structure, main advantages and key technologies of micro photovoltaic inverter are analyzed. Then, the development, evolution and main advantages of CUK converter, as well as the evolution of isolated CUK converter are introduced. A novel soft-switching CUK converter with voltage doubling rectifier is proposed, and the working process of the circuit is analyzed in detail. Through the simulation analysis and mathematical calculation of the system, the main topology and output filter of the system are calculated. Then, the principle analysis and hardware circuit design of DC-DC and DC-AC are carried out respectively. This paper briefly introduces the design of main circuit structure, driving part, sampling part, power supply part and so on. Then, the software design part is analyzed, which mainly introduces the modeling of inverter, the overall control strategy, and the main flow chart of the software. Finally, the construction of the experimental platform is introduced, and based on the TMS320F28335 control chip of TI company, the debugging of the experimental platform is completed in the CCS software development environment, and the corresponding key waveforms of the system are tested and analyzed. The experimental results and simulation results are compared and analyzed, and the corresponding conclusions are given.
【學(xué)位授予單位】:上海電機(jī)學(xué)院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TM464
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