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研究生:白奕峯
研究生(外文):PAI, YI-FENG
論文名稱:以多模糊控制方式設計PV-STATCOM改善交流電弧爐負載衍生之電壓變動問題
論文名稱(外文):Designing PV-STATCOM with Multi-Fuzzy Controls to Mitigate Voltage Fluctuation Problem Caused by AC Electric Arc Furnace Loads
指導教授:劉祐任
指導教授(外文):LIU, YU-JEN
口試委員:陳正一王宏魯呂學德
口試委員(外文):CHEN CHENG-IWANG, HONG-LULU, SHIUE-DER
口試日期:2019-07-24
學位類別:碩士
校院名稱:國立中正大學
系所名稱:電機工程研究所
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:2019
畢業學年度:107
語文別:中文
論文頁數:106
中文關鍵詞:鋼鐵廠電弧爐電力品質PV-STATCOM虛功補償電壓變動模糊控制PID控制器
外文關鍵詞:Steel plantElectric arc furnacePower qualityPV-STATCOMReactive power compensationVoltage fluctuationFuzzy controlPID controller
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許多傳統大型工業電力設施仍持續運轉於既有之電力系統;當中,被視為 工業基礎之鋼鐵廠系統因為複雜的非線性負載運轉特性,使其成為電力系統中重 大的電力品質汙染來源之一。而電力公司與用戶端更加關注由於虛功率所導致的 電壓不穩定性。通常,在大型污染設備附近,會安裝電力品質維護設備,如並聯 電容器組(Shunt Capacitors)、靜態虛功補償器(Static Var Compensator, SVC)與靜態 同步補償器(Static Synchronous Compensator, STATCOM)等,以緩解這些電壓問 題。而如今再生能源的安裝容量,隨著科技發展,逐漸提高,因此,本論文希望 能設計可廣泛使用於太陽能發電系統中的虛功補償控制方法,等同於將太陽能變 流器設計為具有 STATCOM 功能,即構成所謂 PV-STATCOM 系統,用於緩解鋼 廠饋線中的電壓波動問題。本論文所提出之 PV-STATCOM 系統加入了模糊控制 方法進行實/虛功控制以及 PID 控制器之設計。所提出的 PV-STATCOM 設計其性 能透過 MATLAB / Simulink 模擬進行模擬與測試,其結果並再與僅使用非模糊設 計之傳統 PV-STATCOM 系統進行比較,以驗證本論文所提出 PV-STATCOM 系 統之有效性。

Many large-scale industrial facilities continue to operate in power systems; among them, the steel plant system, which is regarded as an industrial foundation, is one of the most significant sources of power quality pollution in power systems because of its complex nonlinear operating characteristics. The power utilities and the customers thus pay more attention to the problem of voltage instability caused by the fluctuation of reactive power from the steel plants. Typically, power quality mitigation equipment such as parallel capacitor bank, static var compensators (SVC), and static synchronous compensators (STATCOM) are commonly used to solve the voltage instability problems. Nowadays, the installations of renewable energy are gradually increasing with the development of science and technology. This paper therefore aims to design a PV-STATCOM system for the mitigation of voltage fluctuation in a steel plant feeder. Meanwhile, applications of fuzzy theory are proposed to create fuzzy-based active/reactive power (P/Q) control method and to design multi-fuzzy PID controller for the designed PV-STATCOM. Performance of proposed PV-STATCOM design is tested and verified by MATLAB/Simulink simulations. Finally, results from traditional iv PV-STATCOM that with traditional P/Q control and non-fuzzy PID controllers are used for comparisons.

目錄
頁碼
致謝 i
中文摘要 ii
英文摘要 iii
目錄 v
圖目錄 viii
表目錄 xii
第一章 緒論 1
1.1 研究動機與目的 1
1.2 相關文獻回顧 2
1.3 論文架構 4
第二章 交流電弧爐負載運轉特性 6
2.1 交流電弧爐系統架構 6
2.2 交流電弧爐不同煉鋼階段特性 6
2.2.1 點弧期 7
2.1.2 溶解期 8
2.2.3 精煉期 11
2.3 交流電弧爐運轉造成的電壓變動問題 12
2.4 傳統電壓變動改善方式 13
第三章 PV-STATCOM控制方法與設計 16
3.1 太陽能發電系統的基本組成 16
3.1.1 太陽能模組與最大功率點追蹤 17
3.1.2直流電容與DC/DC轉換器 22
3.1.3 DC/AC電壓源形變流器 25
3.2 PV-STATCOM基本控制 30
3.2.1三相鎖相迴路 31
3.2.2電壓電流控制 32
3.2.3 脈衝寬度調變 34
3.3 PV-STATCOM實/虛功補償控制策略 34
3.3.1 實功率控制 36
3.3.2 虛功率控制 37
3.3.3變流器容量限制 38
3.4 PV-STATCOM特殊控制設計 39
3.4.1夜晚操作模式 39
3.4.2模式切換 41
第四章 PV-STATCOM結合多模糊控制應用 43
4.1 模糊理論概要 44
4.1.1歸屬函數 45
4.1.2模糊推論與規則 47
4.1.3解模糊化 48
4.2 使用模糊控制方法決定實/虛功補償量 50
4.2.1歸屬函數設定 50
4.2.2模糊規則庫設定 54
4.2.3模糊控制方法決定實/虛功率的控制結果 59
4.3 Fuzzy PID 的控制設計 61
4.3.1 PID控制器概要 62
4.3.2誤差值 63
4.3.3比例增益 65
4.3.4微分增益 66
4.3.5積分增益 66
4.3.6 Fuzzy PID的控制方法 67
4.3.7 Fuzzy PID的控制結果 71
第五章 案例模擬分析與探討 73
5.1 合併運轉階段電壓變動情境 76
5.1.1 無模式切換 77
5.1.2 加入模式切換 79
5.1.3 採用Multi-Fuzzy 控制 81
5.2 點弧期電壓過低情境 86
5.2.1 採用模式切換與Multi-Fuzzy控制方法的比較 86
5.2.2 自調節參數Fuzzy PID控制器 87
5.2.3 較高的固定參數PID控制器 89
5.2.4 較低的固定參數PID控制器 90
5.2.5 自調節參數Fuzzy PI控制器 91
5.3 夜間操作能力呈現 93
5.3.1 夜間運轉情境 93
5.3.2 無夜間運轉模式 95
5.3.3 日照變動情境 97
第六章 結論與未來工作 101
參考文獻 102


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