簡易檢索 / 詳目顯示

回結果列表
研究生： 李晨愷
Lee, Chen-Kai
論文名稱： 具虛擬阻尼繞組之電網形成換流器
A Grid-Forming Inverter with Virtual Damper Winding
指導教授： 陳建富
Chen, Jiann-Fuh
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： 2024
畢業學年度： 112
語文別： 英文
論文頁數： 117
中文關鍵詞： 虛擬同步發電機控制 、阻尼功率 、虛擬阻尼繞組 、中性點箝位換流器
外文關鍵詞： VSG control, Damping power, Virtual damper winding, Neutral point clamped inverter
相關次數： 點閱：57  下載：0 
分享至:
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

    • 由於再生能源發電容量在電網中的占比逐年增加，因此基於虛擬同步發電機控制之換流器被提出。而同步發電機在電網受到較大負載變動時，會經由阻尼繞組會產生暫時性的阻尼功率，以抑制發電機發生追逐現象。本文提出一種基於虛擬同步發電機控制技術的阻尼功率控制方法。透過添加虛擬阻尼繞組至換流器的等效輸出阻抗，以實現同步發電機之阻尼功率。本文採用三相三階中性點箝位換流器架構，輸入直流匯流排電壓為800 V、電網相電壓為 220 Vrms/ 60 Hz、切換頻率為50 kHz、額定視在功率為6.6 kVA之雛形電路。實驗結果顯示，在離網狀態下，換流器運轉於額定功率時之電壓總諧波失真率為1.54%。在併網狀態下，換流器運轉於3.3 kW時之電流總諧波失真率最低為2.54%。加入虛擬阻尼繞組後，在電網頻率驟降至59.95 Hz的情況下，可使安定時間下降約40%。

    Due to the increasing share of renewable energy generation in power grids, inverters based on Virtual Synchronous Generator (VSG) Control have been proposed. Synchronous generators produce temporary damping power through damper windings under significant load changes to suppress oscillations. In this thesis, a damping power control method using VSG control technology, was introduced incorporating virtual damper winding into the inverter equivalent output impedance to emulate the damping power of synchronous generators. A three-phase, three-level neutral-point clamped inverter configuration is used, with an input DC bus voltage of 800 V, grid phase voltage of 220 Vrms/60 Hz, switching frequency of 50 kHz, and rated power of 6.6 kVA. Experimental results in off-grid mode show the THDv of 1.54% at rated power. In grid-connected mode, the total harmonic distortion of the current THDi is 2.54% when operating at 3.3 kW. After adding the virtual damper winding, the settling time decreases by approximately 40% when the grid frequency suddenly drops to 59.95 Hz.

    摘要 I ABSTRACT II 誌 謝 III CONTENTS IV LIST OF FIGURES VI LIST OF TABLES X CHAPTER 1 INTRODUCTION 1 1.1 Research Background and Purpose 1 1.2 Structure 3 CHAPTER 2 LITERATURE REVIEW 4 2.1 Topologies of Multilevel Inverter 4 2.2 Operation Principle of Three-Level NPC Inverter 9 2.3 Clarke and Park Transformation 23 2.3.1 Clarke Transformation and αβ0 Coordinate 25 2.3.2 Park Transformation and dq0 Coordinate 27 CHAPTER 3 METHODOLOGY 29 3.1 Dual Loop Control Scheme under dq0 Coordinate 30 3.1.1 Current Control Loop 33 3.1.2 Voltage Control Loop 36 3.1.3 Equivalent Inverter Output Model 38 3.2 Grid-Forming Control Method 41 3.2.1 Droop Control 42 3.2.2 Virtual Synchronous Generator Control 47 3.2.3 Characteristics of Virtual Synchronous Generator Control 51 3.2.4 Phase-Locked Loop 54 3.3 Damping Power Control 58 CHAPTER 4 KEY PARAMETERS DESIGN 63 4.1 Filter Design 63 4.2 Dual Loop Controller Design 68 4.2.1 Current Loop Controller Design 69 4.2.2 Voltage Loop Controller Design 70 4.3 VSG Control Parameter Design 71 4.3.1 Stability Analysis 72 4.3.2 Characteristic Constraints 80 4.4 Damping Power Control Parameter Design 81 CHAPTER 5 SIMULATION AND EXPERIMENTAL RESULTS 83 5.1 Simulation Results 83 5.1.1 Simulation in Off-grid Operation 83 5.1.2 Simulation in On-grid Operation 85 5.2 Experimental Results 92 5.2.1 Operation in Off-grid State 93 5.2.2 Operation in On-grid State 95 CHAPTER 6 CONCLUSIONS AND FUTURE WORKS 101 6.1 Conclusions 101 6.2 Future Works 101 REFERENCES 103

    [1] A. Nag and R. J. Haddad, “A novel centralized storage model for distributed photovoltaic generation systems,” in Proc. IEEE Int. Conf. Smart Grid Communications., 2017, pp. 122-127.
    [2] F. Blaabjerg, Y. Yang, D. Yang, and X. Wang, "Distributed Power-Generation Systems and Protection," in Proceedings of the IEEE, vol. 105, no. 7, July. 2017, pp. 1311-1331.
    [3] H. Xu, C. Yu, C. Liu, Q. Wang, and X. Zhang, "An Improved Virtual Inertia Algorithm of Virtual Synchronous Generator," Journal of Modern Power Systems and Clean Energy, vol. 8, no. 2, March. 2020, pp. 377-386.
    [4] Q. Ai, X. Wang, X. He, "The impact of large-scale distributed generation on power grid and microgrids," Renewable Energy, vol. 62. 2014, pp. 417-423.
    [5] L. Shan, K. Yamane, T. Kawamura, W. Wu, Z. Hu, Q. Wang, and Y. Wen, "Distributed Energy Resource Management System with Distribution Grid Stabilization," in Proc. 2022 IEEE Power & Energy Society General Meeting (PESGM), Denver, CO, USA, 2022, pp. 1-5.
    [6] Y. Chao-Tsung, P. N. Thanh, C. Ming-Yuan, and C. Meng-Jie, "Design and Construction of Microgrid in Small Factories," in Proc. 2022 5th Asia Conference on Energy and Electrical Engineering (ACEEE), Kuala Lumpur, Malaysia, 2022, pp. 85-89.
    [7] F. Blaabjerg, R. Teodorescu, M. Liserre, and A. V. Timbus, "Overview of Control and Grid Synchronization for Distributed Power Generation Systems," in IEEE Transactions on Industrial Electronics, Oct. 2006, vol. 53, no. 5, pp. 1398-1409.
    [8] L. Huang, H. Xin, and Z. Wang, "Damping Low-Frequency Oscillations Through VSC-HVdc Stations Operated as Virtual Synchronous Machines," in IEEE Transactions on Power Electronics, June. 2019, vol. 34, no. 6, pp. 5803-5818.
    [9] M. T. Chuang, S. Y. Chang, T. C. Hsiao, Y. R. Lu, and T. Y. Yang, "Analyzing major renewable energy sources and power stability in Taiwan by 2030," Energy Policy, 2019, vol. 125, pp. 293-306.
    [10] R. H. Baker and L. H. Bannister, “Electric power converter,” U.S. Patent NO. 3,867,643.18 Feb. 1975.
    [11] T. A. Meynard and H. Foch, "Multi-level conversion: high voltage choppers and voltage-source inverters," PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference, Toledo, Spain, 1992, vol.1, pp. 397-403
    [12] A. Nabae, I. Takahashi, and H. Akagi, "A New Neutral-Point-Clamped PWM Inverter," in IEEE Transactions on Industry Applications, Sept. 1981, vol. IA-17, no. 5, pp. 518-523.
    [13] J. Lai and F. Peng, "Multilevel converters-a new breed of power converters," in Proc. IEEE Transactions on Industry Applications, May-June. 1996, vol. 32, no. 3, pp. 509-517.
    [14] D. C. Raj and D. N. Gaonkar, "Frequency and voltage droop control of parallel inverters in microgrid," 2016 2nd International Conference on Control, Instrumentation, Energy & Communication (CIEC), Kolkata, India, 2016, pp. 407-411.
    [15] H. Ruan, Z. Zhang, Y. Xiao, Y. Yang, and M. Molinas, "Stability Analysis of Grid-Forming Inverters with Voltage and Current Feedforward," in Proc. 2023 IEEE 2nd International Power Electronics and Application Symposium (PEAS), Guangzhou, China, 2023, pp. 791-796.
    [16] M. H. Ravanji, D. B. Rathnayake, M. Z. Mansour, and B. Bahrani, "Impact of Voltage-Loop Feedforward Terms on the Stability of Grid-Forming Inverters and Remedial Actions," in IEEE Transactions on Energy Conversion, Sept. 2023, vol. 38, no. 3, pp. 1554-1565.
    [17] Y. Tao, Q. Liu, Y. Deng, X. Liu, and X. He, "Analysis and Mitigation of Inverter Output Impedance Impacts for Distributed Energy Resource Interface," in IEEE Transactions on Power Electronics, July. 2015, vol. 30, no. 7, pp. 3563-3576.
    [18] X. Zhao and D. Flynn, "Freezing Grid-Forming Converter Virtual Angular Speed to Enhance Transient Stability Under Current Reference Limiting," 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark, 2020, pp. 1-7.
    [19] J. He and Y. W. Li, "Analysis, Design, and Implementation of Virtual Impedance for Power Electronics Interfaced Distributed Generation," IEEE Transactions on Industry Applications, Nov.-Dec. 2011, vol. 47, no. 6, pp. 2525-2538.
    [20] Y. W. Li and C. -N. Kao, "An Accurate Power Control Strategy for Power-Electronics-Interfaced Distributed Generation Units Operating in a Low-Voltage Multibus Microgrid," in IEEE Transactions on Power Electronics, Dec. 2009, vol. 24, no. 12, pp. 2977-2988.
    [21] P. Rodriguez, I. Candela, C. Citro, J. Rocabert, and A. Luna, "Control of grid-connected power converters based on a virtual admittance control loop," 2013 15th European Conference on Power Electronics and Applications (EPE) , 2013, Lille, France, pp. 1-10.
    [22] X. Wang, Y. W. Li, F. Blaabjerg, and P. C. Loh, "Virtual-Impedance-Based Control for Voltage-Source and Current-Source Converters," in IEEE Transactions on Power Electronics, Dec. 2015, vol. 30, no. 12, pp. 7019-7037.
    [23] NERC, "White paper: grid-forming controls, " Grid-Forming Technology - Bulk Power System Reliability Considerations December 2021.
    [24] R. H. Lasseter, Z. Chen, and D. Pattabiraman, "Grid-forming inverters: a critical asset for the power grid," in IEEE Journal of Emerging and Selected Topics in Power Electronics, June. 2020, vol. 8, no. 2, pp. 925-935.
    [25] K. De Brabandere, B. Bolsens, J. Van den Keybus, A. Woyte, J. Driesen, and R. Belmans, "A Voltage and Frequency Droop Control Method for Parallel Inverters," in IEEE Transactions on Power Electronics, July 2007, vol. 22, no. 4, pp. 1107-1115.
    [26] J. Fang, P. Lin, H. Li, Y. Yang, and Y. Tang, "An Improved Virtual Inertia Control for Three-Phase Voltage Source Converters Connected to a Weak Grid," in IEEE Transactions on Power Electronics, Sept. 2019, vol. 34, no. 9, pp. 8660-8670.
    [27] A. Roscoe, T. Knueppel, R. Da Silva, P. Brogan, I. Gutierrez, D. Elliott, & J. C. Perez Campion, "Response of a grid forming wind farm to system events, and the impact of external and internal damping," IET Renewable Power Generation, 14(19), pp. 3908-3917.
    [28] P. Kundur, "Power system stability." Power system stability and control 10 (2007): 7-1.

    無法下載圖示 校內：2029-07-30公開
    校外：2029-07-30公開
    電子論文尚未授權公開，紙本請查館藏目錄
    QR CODE