| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 105 === The subject of this thesis is to design and implement an input-parallel
and output-series-parallel DC/DC converter for wide voltage range
application such as photovoltaic (PV) generation system. The proposed
circuit consists of three phase-shift H-bridge converters with different
power ratings and a series-parallel-switching circuit. The input ports of
three H-bridges are parallel directly while the output ports can be parallel
and/or series through a switching mechanism which provide nine different
configurations of the output ports determined by the value of input voltage
and the power provided by solar power panel. When the input voltage of
the three H-bridge converters are low, connecting the output sides of the
converters in series to obtain high voltage gain. And when the power of
solar power panel rises, the converters connect in parallel to share the
power. In this thesis, to achieve the maximum power point tracking from
the input source by using the perturbation and observation method.
Moreover, this thesis investigates the strategy of power dispatch when
parallel configuration operating. By utilizing on-line particle swarm
algorithm, the system dispatches the input power to maximize the system
efficiency when in parallel mode. Finally, this paper established a 5kW
prototype and using the digital signal processor (DSP TMS320F28069) as
the controller. Experimental results demonstrate the validity of the
proposed converter.
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