本研究開發一套基於MATLAB/Simulink的太陽能模組軟體模型，此模型是以C語言編寫的S-函數自訂函式，以用於搭配Simulink所提供的模擬平台，進行太陽能發電系統的模擬，協助研究處理各種太陽能發電問題。太陽能模組軟體模型模擬之結果，與實際太陽能模組間之功率誤差最大約為1.1 W(4.4 %)。
在架設太陽能相關研究實驗系統時，若採用太陽能模組當成電源，此時所需架構的周邊系統非常龐雜，成本較高，所以本研究同時開發一套以DSP和降壓式轉換器為核心，容量為300W/60V且具有部分遮陰效果之太陽能模組模擬器，供研究使用，以降低研究成本，有其實用價值。此模擬裝置的開發設計，是利用自行開發的太陽能模組軟體模型，參與模擬設計，同時驗證軟體模型的實用性。經由實作成品與實際太陽能模組之特性比對，其功率誤差最大約為1.6 W(6 %)，確認了本裝置在太陽能發電相關研究中，確實可替代實際太陽能模組。
本文嘗試針對兩個太陽能模組並聯且照度不均勻之情況進行建模，發現所建之模型在使用上有所限制。在研究解決方法時，發現了將分散式太陽能模組並聯至直流微電網這種新方案，避免了在太陽能模組這一級的並聯接線，用以解決因為部分模組被遮陰，而造成輸出功率減損之問題。因此嘗試將此太陽能軟體模型，應用在一個直流-直流順向式轉換器的模擬設計上，該轉換器是用以轉換分散式太陽能模組之電能至直流微電網，經模擬驗證，該轉換器之電壓調整率小於1 %，且於並上直流微電網後，確實可將太陽能模組之電能，傳送至電網上，除了確認本軟體模型在應用上的多樣性，同時也驗證了新方案之可行性。

This research develops a software model for photovoltaic modules based on MATLAB/Simulink platform; this software model could simulate the photovoltaic power system and assist the researchers to handle various photovoltaic power issues. The maximum error between software model and a reference reality PV module in power is about 1.1 W (4.4 %).
When using photovoltaic modules to setup research experiment system, the required peripheral systems is very complex, and high cost. Therefore, this study also develops a 300W/60V emulator considering partial shading effects which is an integration of buck converter, DSP, some detectors and rectifier. It could apply to much kind of photovoltaic researches in order to reduce research costs. The software model for photovoltaic modules which is developed in this research is applied to design and develop this emulator; by the way, the practicability of the software model is checked. The maximum error between emulator and a reference reality PV module in power is about 1.6 W (6 %). The emulator could replace reality PV module in some kinds of researches about solar power.
This disseration attempts to build a model of two PV modules in parallel and uneven illumination. A restriction of the model has been found. When looking for a solution of the restriction, a proposal that the distributed PV modules connect with a DC microgrid in parallel is found. This approach avoids the parallel connection of PV modules. When some paralleled PV modules are shaded caused the output power derogation, this issue can be resolved by the approach. Therefore, the software model of photovoltaic modules is applied to a DC-DC forward converter’s design and the proposal’s verification. The software model of photovoltaic modules is combined with some models in SimPowerSystems to build the model of a basic element of a DC microgrid. The basic element includes a photovoltaic module and a forward converter. The output voltage regulation of the forward converter is less than 1 %, and the output power of a PV module is converted to the DC microgrid by checking the simulation results of the basic element’s model and the DC microgrid system model. On the same time, the software model of the photovoltaic module is multipurpose is verified.

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