研究生: |
許賀翔 He-Hsiang Hsu |
---|---|
論文名稱: |
基於類神經網路之混合型太陽能全域最大功率追蹤技術 An Artificial Neural Network Based Hybrid Method for Photovoltaic Global Maximum Power Point Tracking |
指導教授: |
劉益華
Yi-Hua Liu |
口試委員: |
邱煌仁
Huang-Jen Chiu 鄧人豪 Jen-Hao Teng 王順忠 Shun-Chung Wang 鄭于珊 Yu Shan Cheng |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2022 |
畢業學年度: | 110 |
語文別: | 中文 |
論文頁數: | 75 |
中文關鍵詞: | 太陽能發電系統 、部分遮蔭 、全域最大功率追蹤 、類神經網路 |
外文關鍵詞: | Solar Power Generation System, Partial Shading Conditions, Global Maximum Power Point Tracking, Artificial Neural Network |
相關次數: | 點閱:281 下載:0 |
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當太陽能發電系統發生部分遮蔭時,其功率-電壓特性曲線將由單峰變為複雜之多峰曲線,傳統最大功率追蹤(Maximum Power Point Tracking, MPPT)技術應用於部分遮蔭時容易陷入局部最大功率點而使太陽能發電系統無法輸出最大功率,因此能夠追蹤全域最大功率點的技術對太陽能發電系統就顯得格外重要。本文開發一基於類神經網路之混合型太陽能全域最大功率追蹤(Global MPPT, GMPPT)演算法,部分遮蔭發生時先透過第一階段類神經網路及後續計算估測出當時遮蔭樣式下之近似最大功率點電壓,接著利用第二階段自適應步階調變擾動觀察法(Adaptive Variable Step-Size Perturbation and Observation, Adaptive VSS P&O)來正確鎖定全域最大功率點;而於均勻照度下則使用類神經網路估測出第一區間最大功率點電壓後再乘以串聯太陽能電池模組數作為初始操作點,接著執行自適應步階調變擾動觀察法以獲得MPP。
為了驗證本文提出之演算法的可行性及成效,本文利用相同的平台進行模擬,並與近年文獻所提出之8篇基於類神經網路的太陽能全域最大功率追蹤演算法於部分遮蔭情況下針對GMPPT性能進行比較,模擬結果顯示所提方法之平均電能損失僅0.12 W,平均追蹤時間僅1.48 s。為驗證模擬之正確性,本文亦實際完成一1000 W之最大功率追蹤電路,其於隨機挑選的3種遮蔭樣式下之穩態追準確度皆高達99%以上。
When the solar power generation system (SPGS) is partially shaded, its power-voltage characteristic curve will change from a single peak to a complex multi-peak curve. When the traditional maximum power point tracking (MPPT) technology is applied under partially shaded conditions (PSCs), it is easy to fall into a local maximum, and consequently, the SPGS cannot output the maximum power available. Therefore, a technology that can track the global maximum power point (GMPP) is particularly important for the solar power generation system. In this thesis, a neural network-based hybrid global maximum power point tracking (GMPPT) algorithm is developed. When PSC occurs, the first-stage neural network and subsequent calculations are used to estimate the shading pattern and the approximated maximum power point voltage, then the second-stage adaptive variable step-size perturb and observation (VSS P&O) method is used to correctly acquire the GMPP. On the other hand, the neural network is used to estimate the maximum power point voltage of the first interval and then multiplied with the number of solar cell modules in series as the initial operating point under uniform illumination, and then the adaptive VSS P&O method is performed to obtain the exact MPP.
To verify the feasibility and effectiveness of the algorithm proposed in this thesis, this study uses the same platform to perform simulation and compares the obtained results with 8 neural network-based GMPPT algorithms proposed in recent literature in various PSCs. The simulation results show that the average power loss of the proposed method is only 0.12W, and the average tracking time is only 1.48s. To verify the correctness of the proposed technique, a 1000W GMPPT prototyping circuit is also implemented in this thesis, and its GMPP tracking accuracy under three randomly selected shading patterns is all over 99%.
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