- 學位論文
太陽能電池最大功率追蹤控制分析研究
Analysis and Research of Maximum Power Point Tracking for Photovoltaic Cells
摘要
在太陽能發電系統中，太陽能最大功率追蹤對於提昇系統效率是非常重要的技術，對於傳統的太陽能電池轉換效率現階段已到達瓶頸，若是追蹤效率高，則減少多餘的效能損失，使系統運用上能達到更高的發電量。 應用各種方法追蹤太陽能電池最大功率，太陽能電池有最佳工作點，當在於此點工作可獲得最大功率，可是最佳工作點不僅受於日照強度和角度的影響，且受環境及負載的改變影響，因處在不斷變化之中，而用數學模型需透過大量之運算方式才能精確的找出最佳工作點，所以本文主要利用滯環比較法和模糊控制理論來找出太陽能電池最佳工作點，以及利用一種非即時控制之方法，尋找太陽能電池參數後，探討最大功率點所在。 為了驗證以上方法之有效性，本文採用Matlab/Simulink 建立太陽能電池之模型，採用本校所建置太陽光電示範系統之太陽能電池規格，輸入模型中，進行模擬比較，對於三種方法分析討論，所模擬之結果能對於太陽能電池最大功率追蹤方面之研究有所貢獻。
並列摘要
In solar power generating system, tracking the maximum power of solar power plays an important part in raising system’s efficiency. As the traditional solar cell transforming efficiency has now reached a choke point, the higher the tracking efficiency, the lower the power loss and the greater the power generation foe the system. Within several ways to track the maximum power of solar cell, there exists a best working-point in which the solar cell can gain maximum power. However, the best working-point is not only affected by the intensity and degree of sun light, it is also affected by the change of environment and loading. As a result, it needs mathematic models and a large amount of computing to accurately find the best working-point. Consequently, in this paper, we will find the best working-point by Three-point Weight Comparison Method and Fuzzy Logic Control, and discuss where the maximum power point is after using a none-instantaneous method to find the variables of the solar cell.