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研究生：	陳威呈 Chen, Wei-Cheng
論文名稱：	單級三相連續導通模式風能電力轉換器 Single-Stage Three-Phase CCM Wind-Power Converter
指導教授：	林瑞禮 Lin, Ray-Lee
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2013
畢業學年度：	101
語文別：	英文
論文頁數：	188
中文關鍵詞：	單級、三相、連續導通模式、風能、風力發電機、平均電流模式控制、減法器、最大功率追蹤、功率因數修正
外文關鍵詞：	single-stage, three-phase, continuous-conduction-mode (CCM), wind-power, wind turbine generator (WTG), average-current-mode control (ACMC), subtracting amplifier, maximum-power-point-tracking (MPPT), power-factor-correction (PFC)
相關次數：	點閱：133 下載：3
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本論文提出一單級三相連續導通模式風能電力轉換器。傳統風力發電轉換系統須使用兩組轉換器，以實現最大功率追蹤和功率因數修正的功能。其不僅造成電路體積過大、元件增加、成本提高、控制複雜，更導致系統整體效率下降。因此，本論文提出之電路將可同時實現最大功率追蹤與三相功率因數修正之功能，以改善上述之缺點，並且提高風力發電機的機電轉換效率。
本論文提出電路架構和控制機制，分別採用三相功率因數修正轉換器和平均電流模式控制技術，以改善風力發電轉換器的功率因數。此外，依據風力發電機之輸出特性，利用平均電流模式控制法並搭配減法器，使風力發電機的輸出電壓、電流和功率操作在最大功率點，以達成最大功率追蹤之目的。
本論文提出之電路將使用風力發電模擬機組做為雛型電路之交流電源，其模擬風速介於5m/s至9m/s間，最低功率為185W，最高功率則為1079W。最後，實作一單級三相連續導通模式風能電力轉換器的雛型電路，以驗證所擬研製之雛型電路同時具有最大功率追蹤與三相功率因數修正之功能。

This thesis presents a single-stage three-phase CCM wind-power converter. In order to achieve both maximum-power-point-tracking (MPPT) and three-phase power-factor-correction (PFC) mechanisms, two stages are employed in the conventional wind energy conversion system (WECS). However, the two-stage system results in some drawbacks, including larger volume, more components, higher circuit cost, more complicated control scheme and lower system efficiency. Therefore, the proposed converter of this thesis is developed to avoid these problems and increase the electromechanical conversion efficiency of the wind turbine generator (WTG), the MPPT and three-phase PFC mechanisms are employed simultaneously.
In the proposed circuit, a three-phase PFC converter and an average-current-mode control (ACMC) scheme are utilized to improve the power factor of the converter for the WEC. Besides, according to the characteristics of the WTG, the output voltage, current, and power of the WTG can be operated at MPP for each wind speed by using the ACMC scheme and subtracting amplifier.
In this thesis, a wind turbine emulator (WTE) is used as the AC source for the proposed circuit with the emulated wind speed ranging from 5m/s to 9m/s. The lowest and highest powers at MPP of the WTE are 185W and 1079W, respectively. Finally, a prototype circuit of the single-stage three-phase CCM wind-power converter is built to verify the performances using MPPT and three-phase PFC mechanisms.

CHAPTER 1. INTRODUCTION	 1
1. Background	 1
1.1.	Wind Turbine Generator  1
1.2.	Conventional Wind Energy Conversion Systems  3
2. Motivation	 6
3. Thesis Outline  7
CHAPTER 2. THREE-PHASE PFC CONVERTER FOR WIND ENERGY CONVERSION  8
1. Introduction  8
2. Conventional Three-Phase Boost PFC Converter  8
3. Conventional Single-Switch Three-Phase Boost Rectifier  12
4. Conventional Three-Phase Boost Rectifier  13
5. Three-Phase PFC Converter for Wind Energy Conversion  15
6. Measured Characterization Curves of WTG  18
7. PFC Mechanism using UC3854	 20
7.1. Control circuit of PFC mechanism using UC3854  20
7.2. Wye-connection three-phase voltage sensing circuit  22
7.3. Line-current sensing circuit  24
7.4. PFC mechanisms design using UC3854  30
7.5.Problem of three-phase PFC converter for WEC  35
8. Summary  38
CHAPTER 3. PROPOSED SINGLE-STAGE THREE-PHASE CCM WIND-POWER CONVERTER  39
1. Introduction  39
2. MPPT and Three-Phase PFC Mechanisms using UC3854  39
3. Proposed Single-Stage Three-Phase CCM Wind-Power Converter  43
3.1. Prototype circuit of proposed single-stage three-phase CCM wind-power converter  43
3.2. Design of proposed single-stage three-phase CCM wind-power converter  46
3.3. MPPT efficiencies between targeted and operating MPPs  52
4. Summary  54
CHAPTER 4. IMPLEMENTATION AND EXPERIMENTAL RESULTS  55
1. Introduction  55
2. Implementation of Proposed Single-Stage Three-Phase CCM Wind-Power Converter  55
3. Experimental Results  58
4. Summary  77
CHAPTER 5. CONCLUSIONS AND FUTURE WORK  78
REFERENCES  80
APPENDIX A. MATHCAD® EQUATION DERIVATION  84
APPENDIX B. EXPERIMENTAL RESULTS OF DIFFERENT LOAD CONDITIONS AT WIND SPEEDS OF 9M/S, 8M/S, 7M/S, 6M/S, AND 5M/S  93
APPENDIX C. PHOTOGRAPH OF PROTOTYPE CIRCUIT FOR PROPOSED CONVERTER  186
VITA  188


                                    

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校外：2018-08-30公開

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