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研究生:許維倫
研究生(外文):Wei-LunHsu
論文名稱:太陽能電池最大功率快速追蹤方法
論文名稱(外文):A Fast MPPT Method for Solar PV System
指導教授:楊宏澤楊宏澤引用關係
指導教授(外文):Hong-Tzer Yang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電機工程學系碩博士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:英文
論文頁數:59
中文關鍵詞:太陽能最大功率追蹤追蹤速度環境條件變動最佳化擾動觀察法開路電壓法
外文關鍵詞:PhotovoltaicMPPTtracking speedvaried environmental conditionsdP-P&O methodfractional VOC method
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由於太陽能板輸出功率與輸出電壓為非線性關係,為了達到整體最佳效率,最大功率追蹤技術對於太陽能系統應用而言是必須的,本文旨在提出一種新型最大功率追蹤法,改善傳統方法追蹤速度較慢,以及在環境條件如日照量和溫度變動時追蹤錯誤的問題。本文提出之新型最大功率追蹤法合併傳統之最佳化擾動觀察法(dP-P&O)以及開路電壓法,最佳化擾動觀察法藉由在原本最大功率操作週期間額外量測太陽能板輸出功率,消除環境變動造成之功率變化量影響,避免追蹤方向錯誤的問題,但此方法因為擾動量為定值,造成追蹤速度較慢,開路電壓法在系統尚未啟動前先量測開路電壓,並計算出最大功率點的大約位置後直接穩定於此操作點,省略擾動的額外時間,因此選擇開路電壓法加速起始追蹤速度。根據模擬以及實驗結果可證實,本文提出之新型最大功率追蹤法與傳統方法相比,無論是在固定或是瞬間變動環境條件下,皆具有較快及較準確之追蹤結果。
Due to the nonlinear relation of the output power versus the voltage of the photovoltaic (PV) module, the maximum power point tracking (MPPT) technique is necessary for the PV system to have higher efficiency. This thesis proposes a fast MPPT method, which improves the disadvantages of the conventional methods, including slow dynamic tracking speed and tracking error caused by varying environmental conditions of solar irradiation and ambient temperature. The MPPT method proposed by the thesis combines the optimized perturbation and observation (dP-P&O) method and the fractional open-circuit voltage (VOC) method. In order to avoid the tracking error, the dP-P&O method performs an additional measurement of the PV module power during the MPPT tracking process to avoid the influence of the varying environmental conditions. Since the perturbation step is fixed, the dynamic tracking speed is slow. The fractional VOC method directly shifts the operating point to the approximate maximum power point (MPP) estimated based on the measured VOC in the beginning of the MPPT process. Since the additional perturbation time is omitted, the fractional VOC method is used to accelerate the initial tracking speed. Compared with the conventional methods, the simulated and experimental results show that the proposed MPPT method provides a quick and accurate tracking in steady and varying environmental conditions.
摘 要 i
ABSTRACT ii
誌 謝 iv
TABLE OF CONTENTS v
LIST OF FIGURES vii
LIST OF TABLES x
CHAPTER 1. INTRODUCTION 1
1.1 Backgrounds and Motivations 1
1.2 Review of Literature 2
1.3 Research Method 4
1.4 Contributions of the Thesis 5
1.5 Organization of the Thesis 6
CHAPTER 2. MPPT OF PV MODULE 7
2.1 Introduction 7
2.2 Model of Solar PV Module 7
2.3 Conventional MPPT Algorithms 11
2.3.1 P&O Method 11
2.3.2 dP–P&O Method 12
2.3.3 INC Method 14
2.3.4 Variable Step-Size Incremental Conductance Method 16
2.3.5 Fractional Open-Circuit Voltage Method 18
2.4 Summary 19
CHAPTER 3. PROPOSED MPPT METHOD 21
3.1 Introduction 21
3.2 The System Topology for the MPPT 22
3.2.1 The Hardware Architecture 22
3.2.2 The Control Process and Features of the Micro-controller 27
3.2.3 The Proposed MPPT Method 30
3.2.4 Structure of the Proposed MPPT Method 32
3.3 Summary 35
CHAPTER 4. SIMULATION AND EXPERIMENTAL RESULTS 36
4.1 Introduction 36
4.2 Simulation Results 36
4.3 Experimental Results 44
4.4 Summary 51
CHAPTER 5. CONCLUSIONS AND FUTURE PROSPECTS 53
5.1 Conclusions 53
5.2 Future Prospects 54
REFERENCES 55

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