本論文主旨在設計與製作一應用於寬電壓範圍如太陽能發電系
統之並聯輸入串並聯輸出直流/直流轉換器，所提架構包含三組不同
額定功率之相移式全橋轉換器與一串並聯切換電路。三組相移式全橋
轉換器的輸入端以並聯型式連接，輸出端則連接至串並聯切換電路，
並根據系統輸入電壓和輸入功率，改變切換機制使其具有並聯或串聯
等九種不同的連接狀態。當輸入電壓較低時，輸出端以串聯型式連接
以達到高電壓增益；當輸入功率上升時，三組轉換器的輸出端採用並
聯型式連接，以分擔輸出電流應力。為使系統輸入源獲得最大功率輸
出，使用擾動觀察法作為最大功率追蹤策略。另一方面，藉由線上粒
子群演算法，探討系統在並聯模式時的功率調度策略，使之在並聯時
調度輸入功率以最佳化系統效率。最後，本論文建立一 5kW 系統進
行評估以及測試，以數位處理器 TMS320F28069 作為控制器，並透過
實驗結果驗證所提架構之可行性。

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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