臺灣博碩士論文加值系統

本論文整合一個大型離岸式風場與海流場至岸上之電網，並在交流共同匯流排併聯靜態同步補償器，進而比較系統含與不含靜態同步補償器於正常工作條件與擾動條件之工作情形。本論文在三相平衡系統之條件下，採用交直軸等效電路模型來建立系統之數學模型，並以極點安置法設計靜態同步補償器之比例-積分-微分型阻尼控制器。本論文利用頻域之特徵値分析法及時域動態模擬來驗證靜態同步補償器與控制器之效能。由模擬結果顯示，靜態同步補償器能夠有效地改善系統在風速變動或流速變動及其他干擾下之動態響應。

This thesis analyzes and compares the stability improvement of an integrated hybrid large-scale offshore wind farm and marine-current farm with and without the static synchronous compensator (STATCOM) connected to the common AC bus that is fed to the onshore power grid through a transmission line. Under three-phase balanced loading conditions, the q-d axis equivalent-circuit model is developed to establish
the system models, and a proportional-integral-derivative (PID) damping controller of the STATCOM is designed using pole-assignment approach based on modal control theory. For demonstrating the performance of the proposed STATCOM joined with the designed damping controller, frequency- domain approach based on eigenvalue analysis as well as time-domain simulations under disturbance conditions are both performed. It can be concluded from the simulation results that the proposed STATCOM combined with the designed PID damping controller is capable of improving the
performance of the studied integrated hybrid system under variable wind speeds, variable marine-current speeds, and other disturbance conditions.

中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
表目錄 VII
圖目錄 IX
符號說明 XI
第一章 緒論 1
1-1 研究背景 1
1-2 研究動機 3
1-3 相關文獻回顧 3
1-4 本論文之貢獻 11
1-5 研究內容概述 11
第二章 系統之數學模型 13
2-1 前言 13
2-2 風速之數學模型 14
2-3 海流流速之數學模型 16
2-4 聚集等效風渦輪機之數學模型 17
2-5 聚集等效海流渦輪機之數學模型 20
2-6 旋角控制器之數學模型 22
2-7 感應發電機之數學模型 23
2-8 雙饋式感應發電機之數學模型 25
2-9 靜態同步補償器之數學模型 28
第三章 靜態同步補償器之控制器設計 31
3-1 前言 31
3-2 靜態同步補償器之控制系統模型 31
3-3 極點安置法設計比例-積分-微分控制器 33
3-3-1 極點安置法設計控制器之概念 33
3-3-2 控制器之設計結果 36
3-4 靈敏度分析 38
第四章 系統之穩態分析 42
4-1 前言 42
4-2 風速與流速改變之穩態分析 42
4-2-1 風速與流速改變系統之穩態工作點分析 42
4-2-2 風速與流速改變之系統特徵值分析 49
4-3 電網端電壓改變之穩態分析 50
4-3-1 電網端電壓改變系統之穩態工作點分析 50
4-3-2 電網端電壓改變之系統特徵值分析 59
4-4 電網端傳輸線長度改變之穩態分析 62
4-4-1 電網端傳輸線長度改變系統之穩態工作點分析 62
4-4-2 電網端傳輸線長度改變之系統特徵值分析 71
4-5 本地負載阻抗改變之穩態分析 74
4-5-1 本地負載阻抗改變系統之穩態工作點分析 74
4-5-2 本地負載阻抗改變之系統特徵值分析 83
4-6 海流場激磁電容器之電容值改變之穩態分析 86
4-6-1 海流場激磁電容器之電容值改變系統之穩態工作點分析 86
4-6-2 海流場激磁電容器之電容值改變之系統特徵值分析 95
4-7 傳輸線X/R比值改變之穩態分析 98
4-7-1 傳輸線X/R比值改變系統之穩態工作點分析 98
4-7-2 傳輸線X/R比值改變之系統特徵值分析 107
第五章 系統之動態分析 110
5-1 前言 110
5-2 離岸式風場發生轉矩干擾之動態分析 110
5-3 本地負載瞬間改變之動態分析 116
5-4 電網端發生電壓降之動態分析 122
5-5 電網端發生三相短路故障之動態分析 128
5-6 海流場激磁電容器切換之動態分析 135
5-7 風速變動之動態分析 142
第六章 結論與未來研究方向 148
6-1 結論 148
6-2 未來研究方向 150
參考文獻 152

[1] 江榮城，台灣風力發電運轉經驗及未來展望，環保資訊月刊，第97期，2006年5月。
[2] 經濟部能源局，http://www.moeaboe.gov.tw/，2009年4月6日。
[3] 劉建宏，海流發電系統之特性分析，國立成功大學電機工程學系碩士論文，2008年6月。
[4] P. Ledesma and J. Usaola, “Doubly fed induction generator model for transient stability analysis,” IEEE Trans. Energy Conversion, vol. 20, no. 2, pp. 388-397, June 2005.
[5] F. M. Hughes, O. Anaya-Lara, N. Jenkins, and G. Strbac, “Control of DFIG-based wind generation for power network support,” IEEE Trans. Power Systems, vol. 20, no. 4, pp. 1958-1966, November 2005.
[6] M. Kayikci and J. V. Milanovic, “Reactive power control strategies for DFIG-based plants,” IEEE Trans. Energy Conversion, vol. 22, no. 2, pp. 389-396, June 2007.
[7] R. G. de Almeida and J. A. P. Lopes, “Participation of doubly fed induction wind generators in system frequency regulation,” IEEE Trans. Power Systems, vol. 22, no. 3, pp. 944-950, August 2007.
[8] F. Wu, X.-P. Zhang, K. Godfrey, and P. Ju, “Small signal stability analysis and optimal control of a wind turbine with doubly fed induction generator,” IET Generation, Transmission, and Distribution, vol. 1, no. 5, pp. 751-760, September 2007.
[9] H.-S. Ko, G.-G. Yoon, and W.-P. Hong, “Active use of DFIG-based variable-speed wind-turbine for voltage regulation at a remote location,” IEEE Trans. Power Systems, vol. 22, no. 4, pp. 1916-1925, November 2007.
[10] J. G. Slootweg and W. L. Kling, “Aggregated modeling of wind parks in power system,” in Proc. IEEE Power Tech conference, June 23-26, 2003.
[11] C. Chompoo-inwai, W.-J. Lee, P. Fuangfoo, M. Williams, and J. R. Liao, “System impact study for the interconnection of wind generation and utility system,” IEEE Trans. Industry Applications, vo1. 41, no. 1, pp. 163-168, February 2005.
[12] D. Andersson, A. Petersson, E. Agneholm, and D. Karlsson, “Kriegers Flake 640 MW off-shore wind power grid connection - A real project case study,” IEEE Trans. Enegry Conversion, vo1. 22, no. 1, pp. 79-85, March 2007.
[13] S.-S. Chen, L. Wang, W.-J. Lee, and Z. Chen, “Power flow control and damping enhancement of large wind farm using a superconducting magnetic energy storage unit,” IET Renewable Power Generation, vol. 3, no. 1, pp. 23-38, 2009.
[14] I. G. Bryden, S. Naik, P. Fraenkel, and C. R. Bullen, “Matching tidal current plants to local flow conditions,” Energy, vol. 23, no. 9, pp. 699-709, September 1998.
[15] A. S. Bahaj and L. Myers, “Analytical estimates of the energy yield potential from the Alderney Race (Channel Islands) using marine current energy converters,” Renewable Energy, vol. 29, no. 12, pp. 1931-1945, October 2004.
[16] S. E. B. Elghali, R. Balme, K. L. Saux, M. E. H. Benbouzid, J. F. Charpentier, and F. Hauville, “A simulation model for the evaluation of the electrical power potential harnessed by a marine current turbine,” IEEE Journal of Oceanic Engineering, vol. 32, no. 4, pp. 786-797, October 2007.
[17] Y. Yang, M. Kazerani, and V. H. Quintana, “Current-source converter based STATCOM�� Modeling and control,” IEEE Trans. Power Delivery, vol. 20, no. 2, pp. 795-800, April 2005.
[18] A. Jain, K. Joshi, A. Behal, and N. Mohan, “Voltage regulation with STATCOMs�� Modeling, control and results,” IEEE Trans. Power Delivery, vol. 21, no. 2, pp. 726-735, April 2006.
[19] S. V. Bozhko, R. B.-Gimenez, L. Risheng, J. C. Clare, and G. M. Asher, “Control of offshore DFIG-based wind farm grid with line-commutated HVDC connection,” IEEE Trans. Energy Conversion, vol. 22, no. 1, pp. 726-735, March 2007.
[20] H. Gaztanaga, I. E.-Otadui, D. Ocnasu, and S. Bacha, “Real-time analysis of the transient response improvement of fixed-speed wind farms by using a reduced-scale STATCOM prototype,” IEEE Trans. Power Systems, vol. 22, no. 2, pp. 658-666, May 2007.
[21] S. Bozhko, G. Asher, R. Li, J. Clare, and L. Yao, “Large offshore DFIG-based wind farm with line-commutated HVDC connection to the main grid: Engineering studies,” IEEE Trans. Energy Conversion, vol. 23, no. 1, pp. 119-127, March 2008.
[22] H. Chong, A. Q. Huang, M. E. Baran, S. Bhattacharya, W. Litzenberger, L. Anderson, A. L. Johnson, and A.-A. Edris, “STATCOM impact study on the integration of a large wind farm into a weak loop power system,” IEEE Trans. Energy Conversion, vol. 23, no. 1, pp. 226-233, March 2008.
[23] M. Molina, J. A. Suul, and T. Undeland, “Low voltage ride through of wind farms with cage generators: STATCOM versus SVC,” IEEE Trans. Power Electronics, vol. 23, no. 3, pp. 1104-1117, May 2008.
[24] 劉書瑋，市電併聯型風力感應發電機之研究，國立成功大學電機工程學系碩士論文，2005年6月。
[25] 林俊宏，含旋角控制器之市電併聯型風力感應發電機之特性分析，國立成功大學電機工程學系碩士論文，2006年6月。
[26] P. C. Krause, Analysis of Electric Machinery, New York: McGraw-Hill, 1986.
[27] 黃偉，虛功補償元件應用於風場之特性分析，國立成功大學電機工程學系碩士論文，2007年6月。
[28] 陳翔雄，利用超導儲能系統於大型離岸式風場之動態穩定度改善研究，國立成功大學電機工程學系博士論文，2009年3月。
[29] P. M. Anderson and A. A. Fouad, Power System Control and Stability, Iowa: The Iowa State University Press, Ames, 1977.
[30] P. Kundur, Power System Stability and Control, New York: McGraw-Hill, 1994.
[31] 盧志榮，飛輪儲能系統於風力發電系統之功率潮流控制及穩定度分析研究，國立成功大學電機工程學系碩士論文，2008年6月。
[32] 江榮城、張偉能，風場之系統暫態穩定度衝擊模擬，電機技師，第113期，2005年10月。