一种新型软开关微型光伏逆变器的研究
发布时间：2019-06-09 23:50
【摘要】：本文主要研究微型光伏逆变器,该逆变器主要适用于光伏板、蓄电池、燃料电池等低压输入场合。通过对小功率单相光伏逆变器现有主要拓扑结构的比较,提出了一种新型的隔离型CUK软开关DC-DC变换器加电压型全桥逆变为主拓扑的微型逆变器。该拓扑结构先是通过Matlab/Simulink进行仿真验证,完成了系统参数的初步选定与工作过程的简要分析,接着,在实验室搭建了相对应的实验平台对其进行了验证,实验所测结果与仿真结果一致。本论文首先分析了微型光伏逆变器的典型结构、主要优点以及关键技术,然后,介绍了CUK变换器的发展衍变和主要优点,以及隔离式CUK变换器的衍变,接着,提出了一种带倍压整流功能的新型软开关CUK变换器,并详细的分析了该电路的工作过程。通过对系统的仿真分析和数学计算,完成了系统主拓扑及输出滤波器等主要参数计算。然后,分别对DC-DC和DC-AC两部分进行了原理分析和硬件电路设计。简单介绍了主电路结构,驱动部分,采样部分,供电部分等电路的设计。接着,分析了软件设计部分,主要介绍了逆变器的建模,整体控制策略,以及软件主要流程图。最后介绍了实验平台的搭建,并基于TI公司的TMS320F28335控制芯片,在CCS软件开发环境下完成了该实验平台的调试,并测试和分析了系统对应的关键波形,对实验结果和仿真结果进行了对比和分析,并给出了相应结论。
[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.
【学位授予单位】：上海电机学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM464
本文编号：2496000
[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.
【学位授予单位】：上海电机学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM464
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