隨著環保意識高漲及提高能源使用效率，分散式電源近年來備受重視。然而分散式電源併接於低壓配電系統會引起電壓變動，大量的單相分散式電源或單相負載會造成電壓不平衡。本文提出一配電型靜態同步補償器(Distributed STATCOM) D-STATCOM來同時抑制正序基頻電壓與負序基頻電壓的變動，D-STATCOM可視為各別操作在正序基頻電納和負序基頻電導，電納與電導命令可以根據安裝點電壓的變動來動態地調整，將正序基頻電壓回復至正常值以及將負序基頻電壓抑制在允許範圍。本文所提出之控制策略將分別利用電腦模擬與實際電路之實驗結果驗證。

Distributed generation (DG) has received much attention recently due to environmental consciousness and rising of the energy efficiency. However, DG interconnecting to low-voltage distribution system may cause voltage variation, and a lot of single-phase DG or single-phase load may result in voltage unbalance. This thesis presents a distributed-STATCOM (D-STATCOM) to alleviate variation of both positive-sequence and negative-sequence voltages at the fundamental frequency. The D-STATCOM operates as susceptance and conductance at the fundamental positive-and negative-sequence frequency, respectively. The susceptance and conductance commands are dynamically tuned according to voltage fluctuation at the installation location. Therefore, the positive-sequence voltage can be restored to the nominal value as well as the negative-sequence voltage can be suppressed to an allowable level. Computer simulations and experimental results verify the effectiveness of the proposed control strategy.

論文審定書………………………………………………….i
致謝…………………………………………………………ii
摘要.......................................................................................iii
Abstract. ...............................................................................iv
目錄....………………………………………………………v
圖目錄..................................................................................viii
表目錄 .................................................................................xiii
第一章 緒論........................................................................1
1.1 研究背景........................................................................1
1.2 研究動機........................................................................4
1.3 論文大綱........................................................................5
第二章 文獻回顧................................................................6
2.1 簡介................................................................................6
2.2 電壓驟升與三相電壓不平衡的定義、來源、影響及管制規範....................................................................................6
2.2.1電壓驟升(Voltage Swell)............................................6
2.2.2電壓變動管制規範.......................................................7
2.2.3三相電壓不平衡(Three Phase Voltage Unbalance) ................................................................................................8
2.2.4電壓不平衡管制規範.................................................10
2.3 電壓變動分析..............................................................11
2.4 彈性交流傳輸系統(FACTS) ......................................15
2.4.1 彈性交流傳輸系統家族之基本介紹...…….............17
2.4.2 並聯補償的原理……………………………………21
2.5 靜態虛功補償器..........................................................27
2.6 靜態同步補償器..........................................................34
2.7 總結..............................................................................39
第三章 操作原理..............................................................40
3.1 簡介..............................................................................40
3.2 控制架構......................................................................40
3.3 電流調節器..................................................................40
3.4 電納與電導命令控制..................................................48
3.5 向量分析......................................................................51
3.6 總結..............................................................................53
第四章 模擬結果與分析..................................................54
4.1 簡介..............................................................................54
4.2 穩態分析......................................................................55
4.2.1 分散式電源電流控制................................................55
4.2.2 各匯流排電壓驟升和電壓不平衡改善情形............57
4.2.3 電納與電導命令調節................................................62
4.2.4 D-STATCOM之輸入電流.........................................67
4.3 D-STATCOM安裝在不同匯流排...............................68
4.4 暫態分析......................................................................69
4.5 總結..............................................................................71
第五章 實驗結果與分析..................................................72
5.1 簡介..............................................................................72
5.2 數位訊號處理與週邊電路..........................................75
5.2.1 數位訊號處理器簡介................................................75
5.2.2 週邊電路簡介............................................................75
5.3 直流端電壓控制..........................................................76
5.4 穩態操作......................................................................77
5.4.1 三相電壓....................................................................77
5.4.2 正序電壓與電壓不平衡因素....................................78
5.4.3 正序與負序電導命令................................................79
5.4.4 D-STATCOM輸入電流.............................................80
5.5 暫態操作......................................................................84
5.6 結論..............................................................................87
第六章 結論與未來研究方向..........................................88
參考文獻…....……………………………………………..87
附錄………………………………………………………..91

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