為了使電力系統得以維持安全且穩定之運轉，良好的頻率控制機制是關鍵之一。以目前風力發電之發展趨勢而言，電力系統中的風電廠容量將會越來越高，進而取代部份傳統發電機組。此時，若風力發電機無法對系統提供慣性響應，也沒有任何頻率控制機制，這將會導致系統頻率變動率增高，且剩餘之傳統發電機組的負擔也將變大。因此，本文建立出具有慣性響應及調速控制之雙饋式風力發電機頻率響應模型。經由模擬驗證，顯示這兩項輔助控制迴路確實可協助風機改善系統頻率之響應。

Frequency control is essential for the secure and stable operation of a power system. The current trend of wind development shows that more displacement of conventional units by wind generators are undergoing. In this situation, if the wind generator neither provides inertial response nor any frequency control, the increase in the rate of frequency change will lead to additional regulation burden on conventional units. This thesis establishes a frequency response model of a doubly-fed induction generator that is supplemented by the control loops for inertial and speed-droop responses. Simulation results validate the model performance for a better frequency response in a wind penetrated power system.

[1] G.S. Stavrakakis, G.S. Kariniotakis “A General Simulation Algorithm for the Accurate Assessment of Isolated Diesel-Wind Turbines Systems Interaction. Part I: A General Multimachine Power System Model,” IEEE Transactions on Energy Conversion, Vol. 10, No. 3, pp. 577-583, September 1995.
[2] 施清芳，“風場統計與頻譜分析評估風力發電潛能”，台電工程月刊，民國九十五年七月，頁137-145。
[3] Nicholas W. Miller, Juan J. Sanchez-Gasca, William W. Price, Robert W. Delmerico, “Dynamic Modeling of GE1.5 and 3.6 MW Wind Turbine Generators for Stability Simulations,” General meeting of IEEE Power Engineering Society, pp. 1977-1983, July 2003.
[4] Rogério G. de Almeida, J.A. Peças Lopes, J.A.L. Barreiros, “Improving Power System Dynamic Behavior Through Doubly Fed Induction Machines Controlled by Static Converter Using Fuzzy Control,” IEEE Transactions on Power System, Vol. 19, No. 4, pp. 1942-1950, November 2004.
[5] H. Li, Z. Chen, J.K. Pedersen, “Optimal Power Control Strategy of Maximizing Wind Energy Tracking and Conversion for VSCF Doubly Fed Induction Generator System,” CES/IEEE 5th International Conference on Power Electronics and Motion Control Conference, Vol. 3, pp. 1-6, August 2006.
[6] E. Muljadi, C.P. Butterfield, “Pitch-Controlled Variable-Speed Wind Turbine Generation,” IEEE Transactions on Industry Applications, Vol. 17, No. 1, pp. 1942-1950, January/February 2001.
[7] Gillian Lalor, Alan Mullane, Mark O’Malley, “Frequency Control and Wind Turbine Technologies,” IEEE Transactions on Power System, Vol. 20, No. 4, pp. 1905-1913, November 2005.
[8] Alan Mullane, Mark O’Malley, “The Inertial Response of Induction-Machine-Based Wind Turbines,” IEEE Transactions on Power System, Vol. 20, No. 3, pp. 1496-1503, August 2005.
[9] L. Ran, J.R. Bumby, P.J. Tavner, “Use of Turbine Inertia for Power Smoothing of Wind Turbines with a DFIG,” 11th International Conference on Harmonics and Quality of Power, pp. 106-111, September 2004.
[10] G. Lalor, J. Ritchie, S. Rourke, D. Flynn, M.J. O'Malley, “Dynamic Frequency Control with Increasing Wind Generation,” IEEE Power Engineering Society General Meeting, Vol. 2, pp. 1715-1720, June 2004.
[11] R.G. de Almeida, E.D. Castronuovo, J.A.P. Lopes, “Optimum Generation Control in Wind Parks when Carrying Out System Operator Requests,” IEEE Transactions on Power Systems, Vol. 21, No. 2, pp. 718-725, May 2005.
[12] J.L. Rodriguez-Amenedo, S. Arnalte, J.C. Burgos, “Automatic generation control of a wind farm with variable speed wind turbines,” IEEE Transactions on Energy Conversion, Vol. 17, No. 2, pp. 516-524, June 2002.
[13] Global Wind Energy Council, “Global Wind 2006 Report,” 2007. [Online]. Available : http://www.gwec.net/index.php?id=78

[14] 姚孝其、邱詠兆、郭玉樹，“再談國內與國際風力發電之現況與發展”，台電工程月刊，民國九十五年九月，頁123-133。
[15] R. Bergen, Power System Analysis, Prentice-Hall, 1986.
[16] 盧展南、李東、王醴、張簡樂仁、張榮芳，“台灣電力系統頻率轉規範之研擬”，台灣電力公司94年度研究計畫546-2101-9403完整報告。
[17] 涂正義，蔡利郎，曾重富，“電力系統頻率品質之提昇”， 臺電工程月刊，民國九十四年三月，頁29-41。
[18] 林胤均，因應獨立型電力系統的即時偶發事故備載規劃，國立成大學電機工程學系碩士論文，民國95年6月。
[19] Stephen J. Chapman, Electric Machinery Fundamentals 3/E, McGraw-Hill, 1999.
[20] I. Cadirci, M. Ermis, “Double-Output Induction Generator Operating at Subsynchronous and Supersynchronous Speeds,” IEE Proceedings- Electric Power Applications, Vol. 139, No. 5, pp. 429-442, September 1992.
[21] S. Muller, M. Deicke, Rik W. De Doncher, “Doubly Fed Induction Generator System for Wind Turbines,” IEEE Industry Application Magazine, Vol. 8, No. 3, pp. 26-32, May 2002.
[22] L.M. Fernández, C.A. García, F. Jurado, J. R. Saenz, “Control System of Doubly Fed Induction Generators Based Wind Turbines with Production Limits,” IEEE International Conference on Electric Machines and Drives, pp. 1936-1947, May 2005.
[23] L. Holdsworth, X.G. Wu, J.B. Ekanayake, N. Jenkins, “Comparison of Fixed Speed and Doubly-Fed Induction Wind Turbines During Power System Disturbances,” IEE Proceedings-Generation, Transmission and Distribution, Vol. 150, No. 3, pp. 343-352, May 2003.
[24] 林伯峰，“風力機產業技術之趨勢分析”，機械工業期刊，民國九十五年五月，頁27-50。
[25] J.G. Slootweg, H. Polinder, W.L. Kling, “Representing Wind Turbine Electrical Generating System in Fundamental Frequency Simulations,” IEEE Transactions on Energy Conversion, Vol. 18, No. 4, pp. 516-524, December 2004.
[26] Siegfried Heier, Grid Integration of Wind Energy Conversion Systems, Wiley, 1998.
[27] 張偉能，江榮城，“風場之系統暫態穩定度衝擊模擬”，第二十六屆電力研討會，民國九十四年十二月，頁199-204。
[28] Hadi Saadat, Power System Analysis, McGraw-Hill, 2002.
[29] Janaka Ekanayke, Nick Jenkins, “Comparison of the Response of Doubly Fed and Fixed-Speed Induction Generator Wind Turbines to Changes in Network Frequency,” IEEE Transactions on Energy Conversion, Vol. 19, No. 4, pp. 800-802, December 1995.
[30] Chee-Mun Ong, Dynamic Simulation of Electric Machinery Using MATLAB/SIMULINK, Prentice-Hall, 1998.
[31] J. Ekanayake, N. Jenkins, Holdsworth Lee, “Control of DFIG Wind Turbines,” Power Engineer, Vol. 17, No. 1, pp. 28-32, February 1995.
[32] 鄭雅堂，“全球再生能源發電現況及未來展望”，臺電工程月刊，民國九十四年五月，頁40-59。
[33] General Electric Company, 1.5MW Series WTG System Summaries, 2002.
[34] P. Kuandur, Power System Stability and Control, McGraw-Hill, 1994.
[35] J.D. Glover, M. Sarma, Power System Analysis and Design, International Thomson Publishing, 1987.
[36] 吳進忠，獨立電力系統合理備轉容量規劃與調度之研究，國立台灣科技大學電機工程系博士論文，民國九十二年七月。
[37] 張標盛，“台電電力系統之運轉”，臺電工程月刊，民國八十五年五月，頁188-209。
[38] 蔡鴻澤，應用MATLAB圖形使用者介面架構於發電調度模擬系統之設計，國立成大學電機工程學系碩士論文，民國九十五年七月。
[39] 潘宣宏，小型風力發電機之混和型交直流轉換器之研製，國立成大學電機工程學系碩士論文，民國九十五年七月。
[40] Stephen J. Chapman, MATLAB Programming for Engineers 3/E, THOMSON, 2004.
[41] 蒙以正，MATLAB入門與精進，儒林圖書有限公司，民國九十三年九月。
[42] 張智星，MATLAB程式設計，清蔚科技股份有限公司、鈦思科技股份有限公司，民國九十三年九月。