分切合整數位控制之 20 kVA 三相四線式多功能換流器研製

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研究生：	李柏宏 Lee, Po Hung
論文名稱：	分切合整數位控制之 20 kVA 三相四線式多功能換流器研製 Design and Implementation of a 20 kVA D-Σ Digital Controlled Three-Phase Four-Wire Multi-Function Inverter System
指導教授：	吳財福 Wu, Tsai Fu
口試委員:	羅有綱陳裕愷吳財福余國瑞
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：	2015
畢業學年度：	103
語文別：	中文
論文頁數：	116
中文關鍵詞：	三相四線式換流器、分切合整數位控制
外文關鍵詞：	three-phase four-wire inverter, D-Σ digital control
相關次數：	點閱：2 下載：0
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本研究提出分切合整數位控制之20 kVA三相四線式多功能換流器研製，此換流器可操作成併網型或獨立型的再生能源交流供電系統與電池儲能裝置。此兩種應用的獨立型系統控制皆為電壓追蹤型分切合整數位控制法，其涵蓋了負載阻抗估測以及重複控制，使得換流器在任意三相平衡線性負載、三相不平衡負載與非線性負載的條件下能夠穩定輸出弦波電壓。而併網型系統的控制則係電流追蹤型分切合整數位控制法，加上垂降控制的線性實虛功補償方式，以達成特定功率因數的輸出以及維持電網電壓和頻率不變。此外，所應用的分切合整數位控制法係以兩相調變作為基礎，同時引入由向量空間脈寬調變轉換而得的開關時序，並且進一步考慮電感值變化，故對前述兩種系統皆可允許寬廣的電感值變化，達到降低鐵芯體積與成本之目的，增加能夠應用於產業界的可能性。本研究的要點著重於建立分切合整數位控制法在數學上的理論分析模型，並且以控制系統的基本理論來分析分切合整數位控制法在數學理論上所定義的系統穩定度與輸出追蹤能力。文章後段係使用最新功率半導體材料碳化矽所製的金屬氧化物半導體場效電晶體(MOSFET)來實際量測與製作一部20 kVA之三相四線式換流器，以驗證此控制法的可行性。文末則是點出本研究所提出之控制法與傳統控制法的差別何在以及未來的延伸方向。

This thesis presents design and implementation of a 20 kVA division-summation (D-Σ) digital controlled three-phase four-wire multi-function inverter system. The in-verter can be operated in grid-connected or stand-alone mode to act as a renewa-ble-energy ac power-supply system. In the stand-alone mode, the control of this in-verter uses the D-Σ digital control law for voltage tracking which includes load im-pedance estimation and repetitive control, causing the inverter can stabilize sinusoidal output voltage for unbalanced load and nonlinear load. For the grid-connected mode, in order to achieve a specific PF and stabilize grid voltage and frequency, the control is the D-Σ digital control law for current tracking which supplemented by a droop control based linear P-Q compensation. Moreover, the D-Σ digital control law in this research is based on Two-Phase Modulation (TPM) scheme and associated with the switching sequence transformed from space vector pulse width modulation (SVPWM) scheme, and thus, the inductance variation can be taken into account, reducing core size significantly. Finally, the control laws are verified with measured results from a 20 kVA three-phase four-wire inverter system.

總目錄
摘要    i
Abstract    ii
總目錄    iv
圖目錄    viii
表目錄    xiii
第一章    緒論    1
1-1    研究背景與動機    1
1-2    文獻回顧    2
1-2-1    換流器架構    2
1-2-2    換流器控制    5
1-3    論文大綱    9
第二章    D-Σ數位控制    11
2-1    換流器開關切換時序圖    11
2-2    受控體    13
2-2-1    區間Ⅰ(0°~60°)    15
2-2-2    區間Ⅱ(60°~120°)    18
2-2-3    區間Ⅲ(120°~180°)    19
2-2-4    區間Ⅳ(180°~240°)    20
2-2-5    區間Ⅴ(240°~300°)    21
2-2-6    區間Ⅵ(300°~360°)    23
2-3    控制法則    25
2-4    電壓型控制    28
2-4-1    負載阻抗估測    28
2-4-2    電壓型控制系統穩定度分析    32
2-5    電流型控制    36
2-5-1    修正電流型控制的受控體及控制法則    36
2-5-2    垂降控制    36
2-5-3    電流型控制系統穩定度分析    37
第三章    系統程式規劃    41
3-1    主程式流程規劃    41
3-2    類比/數位中斷副程式流程規劃    42
3-3    子程式流程規劃    42
第四章    系統電路設計    46
4-1    微控制器RX62T簡介    46
4-2    輔助電源    48
4-3    電壓箝位電路    50
4-4    精密全波整流電路    51
4-5    交流側電壓電流偵測電路    51
4-5-1    電壓感測電路    51
4-5-2    電流感測電路    52
4-6    直流鏈電壓偵測電路    53
4-7    直流鏈充電電路    54
4-8    開關隔離驅動電路    55
4-9    電網零交越偵測電路    56
4-10    繼電器驅動電路    56

第五章    實驗結果    59
5-1    電氣規格    59
5-2    實務考量    59
5-2-1    電感值變化考量    59
5-2-2    開關死區    63
5-2-3    PWM設定    63
5-2-4    輸出濾波電容補償    64
5-2-5    迴授電路濾波電容    64
5-3    零組件    65
5-4    換流器系統圖及實體照片    65
5-5    換流器模擬系統建模    66
5-6    電壓型控制系統模擬與實測波形    68
5-6-1    電阻性負載    68
5-6-2    電感性負載    70
5-6-3    電容性負載    72
5-6-4    不平衡負載    74
5-7    電流型控制系統模擬與實測波形    75
5-7-1    PF = 1    75
5-7-2    PF = 0.707 leading    78
5-7-3    PF = 0.866 lagging    80
5-7-4    整流模式    82
5-7-5    垂降控制線性實虛功補償    84
5-8    耗損分析    86
5-8-1    電感損耗    86
5-8-2    開關損耗    88
5-8-3    控制電路損耗    89
5-8-4    總損耗與效率    89
5-9    總諧波失真    91
第六章    結論與未來研究方向    93
6-1    結論    93
6-2    未來研究方向    94
6-2-1    LCL濾波器設計    94
6-2-2    多模組並聯    94
參考文獻    96

                                

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