風能為不穩定之能量來源，為了達到有效利用風能，需要搭配一儲能系統緩衝再生能源能量的變化。通常我們使用雙向直流轉換器達成主動控制能量儲存以及風能發電端與負載間的功率流動。由於直流鏈電壓以及儲能裝置輸出電壓之電壓差大，轉換器還須具有高升壓比之能力。雙主動橋式(Dual Active Bridge, DAB)轉換器具有雙向功率流動、電氣隔離、高升壓比能力、以及ZVS軟切之特性，適合做為儲能系統使用。
　　本研究設計與實做一額定為1.5kW之DAB轉換器，搭配鉛酸電池做為再生能源之能量儲存系統；依據功率平衡之條件，控制鉛酸蓄電池組儲能及釋能。實測結果證實本文提出之儲能系統可達成雙向功率流動並平衡再生能源及負載間的功率潮流。

Wind energy is a kind of intermittent energy source. For managing the available wind energy effectively, the energy storage system serves as an energy buffer between wind source and its load. The bidirectional DC-DC power converter has the function to actively control the bidirectional power flow between battery and load, and thus it is usually applied to the energy storage system. Due to the huge voltage difference between DC Link and battery, the bidirectional DC-DC power converter also needs to achieve high step-up ratio in some specific cases. Amongst these requirements, the Dual Active Bridge (DAB) converter possessing functions of bidirectional power flow, electrical isolation, high step-up ratio, and zero voltage switching, is worthy of applications in such energy storage systems.
This thesis presents the design and implementation of a 1.5kW DAB converter equipped with lead acid battery as an actively controlled energy storage device. In accordance with the power balancing rules regulated by the DAB converter, testing results verify that the battery can be charged or discharged to regulate the power flow and balance the electric power between renewable resource and demand.

[1] WWEA, "World Wind Energy Report 2010."
[2] WWEA, "World Wind Energy Report 2009."
[3] WWEA, "World Wind Energy Report 2008."
[4] J. P. Barton and D. G. Infield, "Energy storage and its use with intermittent renewable energy," Energy Conversion, IEEE Transactions on, vol. 19, pp. 441-448, 2004.
[5] L. Peiwen, "Energy storage is the core of renewable technologies," Nanotechnology Magazine, IEEE, vol. 2, pp. 13-18, 2008.
[6] C. Ching-Lung and C. Yi, "ZVS-ZCS bidirectional full-bridge DC-DC converter," in Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on, 2009, pp. 1125-1130.
[7] K. Eun-Soo, K. Tae-Jin, B. Young-Bok, K. Tae-Geun, and K. Yoon-Ho, "High power full bridge DC/DC converter using digital-to-phase-shift PWM circuit," in Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual, 2001, pp. 221-225 vol. 1.
[8] H. Tao, A. Kotsopoulos, J. L. Duarte, and M. A. M. Hendrix, "Family of multiport bidirectional DC-DC converters," Electric Power Applications, IEE Proceedings -, vol. 153, pp. 451-458, 2006.
[9] W. Xinke, Z. Junming, X. Xiaogao, and Q. Zhaoming, "Analysis and Optimal Design Considerations for an Improved Full Bridge ZVS DC-DC Converter With High Efficiency," Power Electronics, IEEE Transactions on, vol. 21, pp. 1225-1234, 2006.
[10] H. Akagi, "THE NEXT-GENERATION MEDIUM-VOLTAGE POWER CONVERSION SYSTEMS," Chinese Institute of Engineers, 2007.
[11] S. Inoue and H. Akagi, "A Bi-Directional Isolated DC/DC Converter as a Core Circuit of the Next-Generation Medium-Voltage Power Conversion System," in Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE, 2006, pp. 1-7.
[12] N. M. L. Tan, T. Abe, and H. Akagi, "A 6-kW, 2-kWh Lithium-Ion battery energy storage system using a bidirectional isolated DC-DC converter," in Power Electronics Conference (IPEC), 2010 International, 2010, pp. 46-52.
[13] A. R. Alonso, J. Sebastian, D. G. Lamar, M. M. Hernando, and A. Vazquez, "An overall study of a Dual Active Bridge for bidirectional DC/DC conversion," in Energy Conversion Congress and Exposition (ECCE), 2010 IEEE, 2010, pp. 1129-1135.
[14] S. Bhattacharya, Z. Tiefu, W. Gangyao, S. Dutta, B. Seunghun, D. Yu, B. Parkhideh, Z. Xiaohu, and A. Q. Huang, "Design and development of Generation-I silicon based Solid State Transformer," in Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE, 2010, pp. 1666-1673.
[15] R. W. A. A. De Doncker, D. M. Divan, and M. H. Kheraluwala, "A three-phase soft-switched high-power-density DC/DC converter for high-power applications," Industry Applications, IEEE Transactions on, vol. 27, pp. 63-73, 1991.
[16] G. Guidi, M. Pavlovsky, A. Kawamura, T. Imakubo, and Y. Sasaki, "Efficiency optimization of high power density Dual Active Bridge DC-DC converter," in Power Electronics Conference (IPEC), 2010 International, 2010, pp. 981-986.
[17] T. Hirose, T. Kimura, K. Harada, and H. Matsuo, "An analysis of bidirectional superposed dual active bridge DC-DC converter with synchronous rectifier," in TENCON 2010 - 2010 IEEE Region 10 Conference, 2010, pp. 1241-1246.
[18] T. Hirose and H. Matsuo, "A consideration of bidirectional superposed dual active bridge dc-dc converter," in Power Electronics for Distributed Generation Systems (PEDG), 2010 2nd IEEE International Symposium on, 2010, pp. 39-46.
[19] M. N. Kheraluwala, R. W. Gascoigne, D. M. Divan, and E. D. Baumann, "Performance characterization of a high-power dual active bridge," Industry Applications, IEEE Transactions on, vol. 28, pp. 1294-1301, 1992.
[20] F. Krismer and J. W. Kolar, "Accurate small-signal model for an automotive bidirectional Dual Active Bridge converter," in Control and Modeling for Power Electronics, 2008. COMPEL 2008. 11th Workshop on, 2008, pp. 1-10.
[21] F. Krismer, S. Round, and J. W. Kolar, "Performance Optimization of a High Current Dual Active Bridge with a Wide Operating Voltage Range," in Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE, 2006, pp. 1-7.
[22] G. G. Oggier, Garci, x, G. O. a, and A. R. Oliva, "Modulation Strategy to Operate the Dual Active Bridge DC–DC Converter Under Soft Switching in the Whole Operating Range," Power Electronics, IEEE Transactions on, vol. 26, pp. 1228-1236, 2011.
[23] H. Sangtaek and D. Divan, "Dual active bridge buck-boost converter," in Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE, 2009, pp. 2905-2911.
[24] H. Sangtaek, I. Munuswamy, and D. Divan, "Preventing transformer saturation in bi-directional dual active bridge buck-boost DC/DC converters," in Energy Conversion Congress and Exposition (ECCE), 2010 IEEE, 2010, pp. 1450-1457.
[25] J. Yiding, S. Qiang, L. Wenhua, and S. Weixin, "Cascaded battery energy storage system based on dual active bridges and a common DC bus," in IPEC, 2010 Conference Proceedings, 2010, pp. 1019-1024.
[26] CSB公司網站. Available: http://www.csb-battery.com/
[27] X. Hailian, L. Angquist, and H. P. Nee, "Design and Analysis of a Controller for a Converter Interface Interconnecting an Energy Storage With the Dc Link of a VSC," Power Systems, IEEE Transactions on, vol. 25, pp. 1007-1015, 2010.
[28] S. S. G. Jayasinghe, D. M. Vilathgamuwa, and U. K. Madawala, "Direct Integration of Battery Energy Storage Systems in Distributed Power Generation," Energy Conversion, IEEE Transactions on, vol. 26, pp. 677-685, 2011.
[29] J. Schonberger, R. Duke, and S. D. Round, "DC-Bus Signaling: A Distributed Control Strategy for a Hybrid Renewable Nanogrid," Industrial Electronics, IEEE Transactions on, vol. 53, pp. 1453-1460, 2006.
[30] P. Thounthong, S. Rael, and B. Davat, "Control Strategy of Fuel Cell and Supercapacitors Association for a Distributed Generation System," Industrial Electronics, IEEE Transactions on, vol. 54, pp. 3225-3233, 2007.
[31] T. L. Vandoorn, B. Meersman, L. Degroote, B. Renders, and L. Vandevelde, "A Control Strategy for Islanded Microgrids With DC-Link Voltage Control," Power Delivery, IEEE Transactions on, vol. 26, pp. 703-713, 2011.
[32] T. Instruments, "TMS320x2833x Analog-to-Digital Converter(ADC) Module," p. Reference Guide SPRU812A, October 2007.
[33] 富士電機電子設備技術株式會社, "富士IGBT-IPM應用手冊," 2004.
[34] T. Instruments, "TMS320x2833x, 2823x Enhanced Pulse Width Modulator (ePWM) Module," p. Reference Guide SpRUG04A, July 2009.