成功大學博碩士論文系統

簡易檢索 / 詳目顯示

回結果列表

研究生：	孫智哲 Sun, Chie-Che
論文名稱：	風場動態簡化模型之建構及變速風機之控制策略 Wind Farm Simplified Dynamic Model and Control Strategies for Variable Speed Wind Turbines
指導教授：	張簡樂仁 Chang-Chien, Le-Ren
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：	2012
畢業學年度：	100
語文別：	英文
論文頁數：	119
中文關鍵詞：	控制策略、簡化模型
外文關鍵詞：	control strategy, simplified dynamic model
相關次數：	點閱：91 下載：3
分享至:	分享至facebook 分享至twitter

查詢本校圖書館目錄查詢臺灣博碩士論文知識加值系統勘誤回報

隨著風力發電的蓬勃發展，大型風場的需求與日俱增，導致風力發電在電力系統中的佔比增加。由於風能的間歇性質，輸出功率不穩定的特性勢必會對系統有所衝擊，為了減少對系統的不確定影響，良好的策略對於風機控制是不可或缺的。本文提出兩種可使永磁式同步發電機具有平穩之實功輸出且兼具穩定運轉的控制策略；其一為轉速控制策略，利用轉動慣量儲能的特性，使平穩輸出功率上有優異的表現；其二為峰值功率控制策略，峰值功率控制可在減少風機的傳動機構損耗下使風機有穩定的功率輸出。
目前大型風場皆因風場模型結構複雜導致分析及模擬上的困難，本論文提出可應用於全風速資料之風機簡化模型，進而推導出風場之簡化模型。簡化模型包含：風渦輪機、永磁式同步發電機、轉子模型以及旋角控制系統。最後，經由與原風機及風場模型的模擬比較，證明簡化模型可有效地扮演風場動態輸出的能力。

With the highly development of wind generation system, the demand of large-scale wind farms is increasing dramatically. Due to the intermittent characteristic of wind energy, the fluctuation of output power may inevitably impact the power system. For reducing the uncertain challenges on the operation stability of power system, proper controls are indispensable. In this thesis, two proposed operating strategies are proposed to control power output of the PMSG type wind turbines. Rotor Speed Control (RSC) strategy has a good performance on keeping constant power output by using its rotating inertia as a energy buffer. Peak Power Control (PPC) strategy provides a smooth power output with less wear and tear on drive train.
Nowadays, wind farm behavior is difficult to study or analyze because of the complexity of wind turbine models. In this thesis, a reduced WTG model for variable wind speed is proposed. Based on the reduced WTG model, a reduced wind farm model, which is called lumped model, is further constructed. The lumped model still keeps essential components of wind turbine, PMSG, rotor inertia and pitch angle controller so that important features of wind turbine are still well retained. Finally, the lumped model is compared with the detailed model by several simulation tests. To validate the effectiveness of the lump model in portraying the dynamic output of wind farms.

摘要	                                     I
Abstract	                        III
Acknowledgements	                V
Contents	                        VI
List of Figures	                        IX
List of Tables	                        XI
Chapter 1  Introduction	                1
1 Motivation	                        1
2 Research Goals and Contributions	4
3 Thesis Organization	                4
Chapter 2  Construction of Reduced-order Wind-generation Model with MPPT Algorithm	        6
1 Introduction	                6
2 Wind Turbine Model	                7
3 Maximum Power Point Tracking Methodology	12
4 Reduced Generating Model	        16
5 Reduced WTG Model	                18
5.1 Pitch Angle Controller Disabled	18
5.2 Pitch Angle Controller Enabled	21
Chapter 3  Rotor Speed Control Strategy	24
1 Introduction	                24
2 Rotor Speed Control Strategy Scheme	24
2.1 SPO Scheme	                25
2.2 MPPT Mode	                        30
2.3 PAC mode	                        33
3 Performance of Single Wind Turbine in RSC Strategy	38
4 Influence of Rotor Inertia	        41
5 Summary	                        45
Chapter 4  Peak Power Control Strategy	46
1 Introduction	                46
2 Peak Power Control Scheme	        47
2.1 MPPT mode	                        47
2.2 PAC mode	                        48
3 Performance of Single Wind Turbine in PPC Strategy	51
4 Wear and Tear Consideration	        54
5 Summary	                        57
Chapter 5  Simulation Test of the Proposed Wind Turbine Control Strategies	                58
1 CASE1	                        59
2 CASE2	                        62
3 Summary	                        64
Chapter 6  Equivalent Lumped Wind Generator Model for Wind Farm Analysis	                        65
1 Introduction	                65
2 Construct Equivalent Wind Turbine Generator Model	67
2.1 Wind Turbine Equivalent Model	67
2.2 PMSG Equivalent Model and Swing Equation	70
2.3 Moment of Rotor Inertia in Lumped Wind Generation System	                                72
3 Pitch Angle in Lumped Model	        74
3.1 Failure of Lumped Model Caused by Pitch Angle Controller	                        75
3.2 Apply PPC Strategy in Lumped Wind Generator Model	83
3.3 Apply RSC Strategy in Lumped Wind Generator Model	88
4 Relationship between Individual and Equivalent Rotor Speed	                                90
5 Summary	                        92
6 Simulation Test of Output Power Provided From Lumped Model	                                94
6.1 CASE1: Pitch Angle Controllers Are Disabled	95
6.2 CASE2: Apply PPC Strategy into Lumped Model	99
6.3 CASE3: Apply RSC Strategy into lumped Model	105
7 Executing Time of Simulation	111
Chapter 7  Conclusions and Future Works	112
1 Conclusions	                        112
2 Future works	                113
Bibliography	                        114
Appendix	                        116
Vita	                                119


                                    

[1]The World Wind Energy Association, “Half-year Report 2011,” 2011.
[2]A. Schwarzenegger, “Comparative costs of california central station electricity generation,” Energy, no. January, 2010.
[3]Global Wind Energy Council, “Global Wind Report ‘Annual Market Update 2010’,” 2010.
[4]K. Han and G.-zhu Chen, “A novel control strategy of wind turbine MPPT implementation for direct-drive PMSG wind generation imitation platform,” in 2009 IEEE 6th International Power Electronics and Motion Control Conference, 2009, vol. 3, pp. 2255-2259.
[5]J.-R. JHANG, “Controllable Wind Generation System Realized by Energy Storage Equipment,” National Cheng Kung University.
[6]G. Riahy and P. Freere, “Dynamic controller to operate a wind turbine in stall region,” in Proceeding of Solar’97, 1997, p. 152.
[7]C. Eisenhut, F. Krug, C. Schram, and B. Klckl, “Wind-Turbine Model for System Simulations Near Cut-In Wind Speed,” IEEE Transactions on Energy Conversion, vol. 22, no. 2, pp. 414-420, Jun. 2007.
[8]K. Tan and S. Islam, “Optimum Control Strategies in Energy Conversion of PMSG Wind Turbine System Without Mechanical Sensors,” IEEE Transactions on Energy Conversion, vol. 19, no. 2, pp. 392-399, Jun. 2004.
[9]H. Saadat, Power System Analysis, 2nd ed. McGraw-Hill.
[10]Y.-ching Yin, “Strategies of Real Power Control for DFIG Wind Turbines and Wind Farms,” National Cheng Kung University.
[11]L. Lin, J. Zhang, and Y. Yang, “Comparison of pitch angle control models of wind farm for power system analysis,” in 2009 IEEE Power & Energy Society General Meeting, 2009, pp. 1-7.
[12]J. Zhang, M. Cheng, Z. Chen, and X. Fu, “Pitch angle control for variable speed wind turbines,” in 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies, 2008, no. April, pp. 2691-2696.
[13]General Electric Company, “1.5MW Series WTG System Summaries,” 2002.
[14]K. Tan, T. T. Yao, and S. Islam, “Effect of loss modeling on optimum operation of wind turbine energy conversion systems,” in 2005 International Power Engineering Conference, 2005, no. 1, pp. 1-92.
[15]S. Chapman, Electric Machinery Fundamentals, 4th ed. McGraw-Hill.
[16]K.-chan Kim et al., “Analysis on the direct-driven high power permanent magnet generator for wind turbine,” 2005 International Conference on Electrical Machines and Systems, pp. 243-247 Vol. 1, 2005.
[17]H. Sipeng, Z. Yangfei, L. Xianyun, and Y. Yue, “Equivalent wind speed model in wind farm dynamic analysis,” in 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011, pp. 1751-1755.
[18]J. G. Slootweg and W. L. Kling, “Modeling of large wind farms in power system simulations,” in IEEE Power Engineering Society Summer Meeting,, 2002, vol. 1, pp. 503-508.
[19]J. P. Hayes, Introduction to Digital Logic Design. Addison Wesley.

校內：2014-07-20公開
校外：2014-07-20公開

簡易檢索 / 詳目顯示

相關論文