| Summary: | 碩士 === 國立交通大學 === 電控工程研究所 === 98 === The purpose of this thesis is to develop high efficiency, and high step-up ratio of photovoltaic energy conversion system. First, in order to make solar photovoltaic energy conversion system assembly with a more flexible and future expansion capability , and it's can be applied to different situations. This type power converter with solar panels may constitute divergent type of power system. The current general type boost DC / DC converter circuit topology, step-up ratio can not be too high, so this study, high step-up ratio of DC / DC conversion device to raise the output voltage can be higher than normal boost converter to the many, the circuit is integrated boost converter and flyback converter the combination of power converter. The circuit topology uses coupled-inductor techniques to achieve high output voltage gain ratio with low conduction duty cycle.
In this system, PSIM simulation software to analyze digital control system design as a basis. Software used for a FPGA (Field Programmable Gate Array) to control as the core of the system. The use of VHDL (VHSIC hardware description language; VHSIC: very-high-speed integrated circuit) hardware description language to achieve high step-up DC / DC converter voltage feedback control for the production of chips. Solar panel output DC voltage from the high step-up ratio of DC / DC converter boost to the fixed output voltage 200V.Finally implement 85W photovoltaic energy conversion system to provide simulation and experimental results to verify efficiency of the developed photovoltaic energy conversion system and correctness of the design procedure of such a digital controller.
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