Abstract：Improved Steinmetz connection of three-phase self-excited induction generator is analyzed in steady-state operation. The loop impedance of the generator system in such connection is obtained with the symmetrical component method, which is supposed to be zero according to Kirchhoff’s voltage law (KVL). The combinations of capacitors for the given load and output voltage is calculated by setting the loop impedance to be zero. The optimum combination for steady state operation of the system is determined by the minimum negative sequence current. The calculated results are in good agreement with the experimental results, which verified the validity and correctness of the analysis method.
[1] 杨良, 王议锋, 孟准. 小型并网风力发电系统控制策略[J]. 电工技术学报, 2017, 32(10): 252-263. Yang Liang, Wang Yifeng, Meng Zhun.Control strategy of a small-scale grid-connected wind gener- ation system[J]. Transactions of China Electro- technical Society, 2017, 32(10): 252-263. [2] Thomsen B, Guerrero J M, Thogersen P B.Faroe island wind-powered space heating microgrid using self-excited 220kW induction generator[J]. IEEE Transactions on Sustainable Energy, 2014, 5(4): 1361-1366. [3] 王东, 马伟明, 刘德志. 考虑机械功率波动时三/三相感应发电机系统的小扰动分析[J]. 电工技术学报, 2007, 22(11): 29-34. Wang Dong, Ma Weiming, Liu Dezhi, et al.Small disturbance analysis on the mechanical power fluctuations in 3/3 dual stator induction generator system[J]. Transactions of China Electrotechnical Society, 2007, 22(11): 29-34. [4] Chilipi R R, Singh B, Murthy M M, et al.Design and implementation of dynamic electronic load controller for three-phase self-excited induction generator in remote small-hydro power generation[J]. IET Electric Power Applications, 2011, 5(2): 247-257. [5] Singh B, Murthy S S, Gupta S.A stand-alone generating system using self-excited induction gener- ators in the extraction of petroleum products[J]. IEEE Transactions on Industry Applications, 2010, 46(1): 94-101. [6] Karthigaivel R, Kumaresan N, Subbiah M.Analysis and control of self-excited induction generator- converter systems for battery charging application[J]. IET Renewable Power Generation, 2014, 8(3): 269-280. [7] Jardan R K, Stumpf P, Varga Z, et al.Novel solutions for high-speed self-excited induction generators[J]. IEEE Transactions on Industry Electronics, 2016, 63(4): 3124-2132. [8] Chan T F, Lai L L.A novel excitation scheme for a stand-alone three-phase induction generator supplying single-phase loads[J]. IEEE Transactions on Energy Conversion, 2004, 19(1): 136-143. [9] Murthy S S, Singh B, Sandeep V.Design-based computational procedure for performance prediction and analysis of single-phase self-excited induction generator[J]. IET Electric Power Applications, 2013, 7(6): 477-486. [10] Singh B, Murthy S S, Chilipi R R.STATCOM-based controller for a three-phase SEIG feeding single- phase loads[J]. IEEE Transactions on Energy Conversion, 2014, 29(2): 320-331. [11] 吴新振, 张阳, 李嘉. 三相异步发电机带单相负载稳态运行时的复合序网模型[J]. 电工技术学报, 2016, 31(9): 156-161. Wu Xinzhen, Zhang Yang, Li Jia.Compound sequence network model for steady state analysis of three-phase induction generator supplying single- phase load[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 156-161. [12] Murthy S S.A novel self-induced self-regulated single-phase induction generator I: basic system and theory[J]. IEEE Transactions on Energy Conversion, 1993, 8(3): 377-382. [13] Fukami T, Kaburaki Y, Kawahra S, et al.Perfor- mance analysis of a self-regulated self-excited single-phase induction generator using a three-phase machine[J]. IEEE Transactions on Energy Con- version, 1999, 14(3): 622-627. [14] Chan T F.A novel single-phase self-regulated self-excited induction generator using a three-phase machine[J]. IEEE Transactions on Energy Con- version, 2001, 16(2): 204-208. [15] Chan T F, Lai L L.Capacitance requirements of a three-phase induction generator self-excited with a single capacitance and supplying a single-phase load[J]. IEEE Transactions on Energy Conversion, 2002, 17(1): 90-94. [16] 邹文学, 庞兵, 陈庆国. 非线性电力系统中对称分量法的应用[J]. 电机与控制学报, 2011, 15(5): 83-88. Zou Wenxue, Pang Bing, Chen Qingguo.Application of symmetrical component method and comparision with other power theory in nonlinear power system[J]. Electric Machines and Control, 2011, 15(5): 83-88.
2018, Vol. 33 
