Abstract：The impact of self-excited induction generator on the weak three-phase unbalanced power system in the initial period of black-start is studied. The theoretical formula for the proportion of negative sequence current is obtained by analyzing the steady-state model of an isolated power grid utilizing symmetrical components method and error analysis. Based on this formula, the effect of different operational strategies for a distributed generation grid on the unbalanced degree of the branch current of a synchronous generator is analyzed under constant loading. Analysis results show that an inappropriate control strategy for a self-excited induction generator will reduce the security of the synchronous generator instead. Finally, a comparative analysis between the simulation results and the theoretical calculation verifies the accuracy and the validity of the conclusions.
贺星棋, 刘俊勇, 杨可, 谢连芳. 分布式电源对故障恢复初期不平衡孤网稳态特性影响[J]. 电工技术学报, 2011, 26(7): 120-125.
He Xingqi, Liu Junyong, Yang Ke, Xie Lianfang. Effects of Distributed Generation on Steady-State Characteristics of Unbalanced Isolated Power System in Initial Period of Fault Restoration. Transactions of China Electrotechnical Society, 2011, 26(7): 120-125.
[1] 梁才浩, 段献忠. 分布式发电及其对电力系统的影响[J]. 电力系统自动化, 2001, 25(12): 53-56. Liang Caihao, Duan Xianzhong. Distributed generation and its impact on power system[J]. Automation of Electric Power Systems, 2001, 25(12): 53-56. [2] Yasuda K, Ishii T. Analysis and autonomous distributed control of super distributed energy systems[C]. Transmission and Distribution Conference and Exhibition 2002 Asia Pacific IEEE/PES, 2002, 3: 1628-1631. [3] 申洪, 王伟胜, 戴慧珠. 变速恒频风力发电机组的无功功率极限[J]. 电网技术, 2003, 27(11): 60-63. Shen Hong, Wang Weisheng, Dai Huizhu. Reactive power limit of variable-speed constant-frequency wind turbine[J]. Power System Technology, 2003, 27(11): 60-63. [4] Philip P Barker, Robert W de Mello. Determining the impact of distributed generation on power systems: Part 1: radial distribution systems [C]. IEEE Power Engineering Society Summer Meeting, 2000, 3: 1645-1656. [5] Miller N W, Walling R A, Achilles A S. Impact of distributed resources on system dynamic performance[C]. Transmission and Distribution Conference and Exposition, 2001 IEEE/PES, 2001, 2: 951-952. [6] Ed Mayer. Competitive power solutions [C]. IEEE Power Engineering Society Summer Meeting, 2000, 3: 1668-1669. [7] Guttromson Ross T. Modeling distributed energy resource dynamics on the transmission system[J]. IEEE Transactions on Power Systems, 2002, 17(4): 1148-1153. [8] 何仰赞, 温增银, 汪馥英, 等. 电力系统分析(上)[M]. 武汉：华中理工大学出版社, 1996. [9] 谢应璞. 电机学(上、下)[M]. 成都：成都科技大学出版社, 1994. [10] 吴新振, 王祥珩, 郝宽胜. 异步发电机恒压运行时机端无功补偿功率[J]. 清华大学学报(自然科学版), 2007, 47(1): 13-16. Wu Xinzhen, Wang Xiangheng, Hao Kuansheng. Terminal reactive compensation power of induction generator under constant voltage operation [J]. Journal of Tsinghua University (Sci & Tech), 2007, 47(1): 13-16. [11] Murthy S S, Singh B, Gupta S, et al. General steady-state analysis of three-phase self-excited induction generator feeding three-phase unbalanced load-single-phase load for stand-alone applications[J]. IEE Proceedings of Generation, Transmission and Distribution, 2003, 150(1): 49-55. [12] Chan T F, Loi Lei Lai. Steady-state analysis and performance of a stand-alone three-phase induction generator with asymmetrically connected load impedances and excitation capacitances [J]. IEEE Transactions on Power Systems, 2001, 16(4): 327-333. [13] Adibi M M, Milanicz D P, Volkmann T L. Asymmetry issues in power system restoration[J]. IEEE Transactions on Power Systems, 1999, 14(3): 1085-1091.
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