分散式太陽能系統為了解決集中式在遮蔽狀況下的問題，在每一片太陽能電池輸出端接上一塊DC/DC Converter，再串並聯輸出，優點在於當某片太陽能電池故障時，不會影響到其他片，且各片都可以操作在最大功率點。星狀分散式系統不同於一般分散式的地方是以一個高階中央控制器負責所有計算工作，包括PI穩壓控制、MPPT運算及和資料蒐集。本研究則是星狀分散式系統的延伸，在架構上將運算工作分成兩個部分，一是加入微控制器負責PI穩壓控制的運算，另一個是由中央控制器負責MPPT的運算。本研究將針對多晶矽太陽能電池設計出一塊功率優化器（Power Optimizer），採用Buck結合Boost Converter，搭配自製的電壓、電流量測電路，並且擁有自給式的電源供應電路，不需要額外供電。
模擬方面將使用LabVIEW和Multisim兩套軟體，針對太陽能電池特性曲線、暫態反應以及穩態反應進行模擬。另外也有對分散式系統穩壓MPPT的模擬。
實驗方面先前是針對四片薄膜矽的太陽能電池進行星狀分散式實驗，而本次研究則是針對八片多晶矽太陽能電池進行星狀分散式實驗，將測試在長時間的運作下的發電情形，以及測試在不同遮蔭狀況下的發電情形。

Distributed photovoltaic system in order to solve the problems of the partial shadowing on concentrated photovoltaic system, setting up a DC/DC converter on each solar panel output terminal. In this system, when certain panel breakdown, other panels have no effect. Every panel also can operate at maximum power point. The Star-shaped distributed photovoltaic system has a high-level controller to do all work, including PI voltage regulator, MPPT operation and data collector. This study is the extension of star-shaped distributed photovoltaic system. The structure divides the operation work into two parts: one is PI voltage regulator by microcontroller; another one is MPPT operation by central controller. This study designs the power optimizer of polysilicon photovoltaic panel, which includes buck and boost converter, measurement circuit and self-sufficient power supply.
LabVIEW and Multisim are two software to simulate. To simulate the characteristic curve of solar cell, transient response, steady state response and distributed photovoltaic system of PI voltage regulator at MPPT mode.
Before using four thin-film photovoltaic panels to do experiment of star-shaped distributed photovoltaic system. This study uses eight polysilicon photovoltaic panels to do experiment of star-shaped distributed photovoltaic system on long duration and partial shadowing.

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