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| Leakage Inductances Matrix Identification of New Converter Transformer Based on Levenberg-Marquadt Nonlinear Least Squares Algorithm |
| Zhao Zhiyu, Luo Longfu, Xu Jiazhu, Li Yong, Thanh Ngoc Tran, Zhang Jie, Ning Zhihao |
| Hunan University Changsha 410082 China |
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Abstract Leakage inductance parameters identification is very vital for new converter transformer protection. Because of the particular winding scheme of new converter transformer, a matrix form of leakage parameters is deduced to represent this particularity, meanwhile, and a nonlinear least squares method based on Levenberg-Marquadt algorithm applying on the parameters matrix identification is proposed. Simulation results in normal and various external fault situations show that the leakage parameters can be identified correctly. And the identification errors are small, which are large in internal faults, so the results identified by this method can differentiate internal faults from the former exactly. The identification method of leakage inductance parameters can not only reduce the redundancy of mathematical modeling, identify the parameters matrix quickly and accurately, but also deal with collinear problem in voltage and current data of new converter transformer, so that it can identify the parameters matrix quickly and accurately and avoid falling into local optima in the identification process. The rapidly identification method for leakage inductance parameters of new converter transformer proposed in this paper makes a certain theoretical foundation laid for its further protection research.
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Received: 25 March 2011
Published: 25 March 2014
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[1] 许加柱, 罗隆福, 李季, 等. 自耦补偿与谐波屏蔽换流变压器的接线方案和原理研究[J]. 电工技术学报, 2006, 21(9): 44-50.
[2] 许加柱, 罗隆福, 李季, 等. 交流系统故障对滤波换相换流器的影响分析[J]. 电工技术学报, 2010, 25(1): 144-150, 177.
[3] Tran T, Luo L, Xu J, et al. Analysis of the characteristics of the new converter transformer based on the matrix model[J]. IEEE Transactions on Power Delivery, 2012, 27(2): 821-830.
[4] Luo Longfu, Li Yong, Xu Jiazhu, et al. A new converter transformer and a corresponding inductive filtering method for HVDC transmission system[J]. IEEE Transactions on Power Delivery, 2009, 23(3): 1426-1431.
[5] 许加柱, 罗隆福, 李季, 等. 新型换流变压器及其滤波系统的换相电抗的分析计算[J]. 电工技术学报, 2007, 22(10): 49-54.
[6] Ge B, A T de Almeida, et al. An equivalent instantaneous inductance-based technique for discrimination between inrush current and internal faults in power transformers[J]. IEEE Transactions on Power Delivery, 2005, 20(4): 2473-2482.
[7] S Jiale, Z Jiao, G Song, et al. Algorithm to identify the excitation inductance of power transformer with wye-delta connection[J]. IET Electric Power Applications, 2009, 3(1): 1-7.
[8] 黄锐锋, 李琳. 新的基于相分量的变压器模型及其在统一广义双侧消去法中的应用[J]. 中国电机工程学报, 2004, 24(7): 188-193.
[9] Selva S Moorthy, David Hoadley. A new phase- coordinate transformer model for bus analysis[J]. IEEE Transactions on Power Systems, 2002, 17(4): 951-956.
[10] 罗隆福, 李勇, 许加柱, 等. 基于相分量法的新型换流变压器数学模型[J]. 电工技术学报, 2007, 22 (1): 34-40.
[11] 罗隆福, 张杰, 李勇, 等. 基于稀疏列表法的新型换流变压器数学模型[J]. 电工技术学报, 2008, 23(4): 59-65.
[12] 张杰, 罗隆福, 张志文, 等. 新型换流变压器建模及故障计算[J]. 高电压技术, 2009, 35(12): 2983- 2988.
[13] 张杰, 罗隆福, R K Aggarwal, 等. 基于多线圈耦合的新型换流变压器仿真模型设计[J]. 电工技术学报, 2010, 25(11): 68-79.
[14] 杨浩, 曾鑫, 罗建. 基于约束最小二乘法的变压器三相漏感辨识算法[J]. 电力系统自动化, 2009, 33(13): 68-72.
[15] 郝治国, 张保会, 褚云龙, 等. 基于等值回路平衡方程的变压器保护原理的研究[J]. 中国电机工程学报, 2006, 26(10): 67-72.
[16] 索南加乐, 焦在滨, 康小宁, 等. YD接线变压器漏感参数的识别方法[J]. 中国电机工程学报, 2008, 28(13): 84-90.
[17] Kaj Madsen, Hans Bruun Nielsen, Ole Tingleff, Methods for non-linear least squares problems[M] 2nd ed. Lyngby: Informatics and Mathematical Modelling, Technical University of Denmark, DTU, 2004.
[18] 魏木生. 广义最小二乘问题的理论和计算[M]. 北京: 科学出版社, 2006.
[19] 李勇, 罗隆福, 贺达江, 等. 新型直流输电系统典型谐波分布特性分析[J]. 电工技术学报, 2009, 33(10): 59-63.
[20] 李勇, 罗隆福, 刘福生, 等. 变压器感应滤波技术的发展现状与应用前景[J]. 电工技术学报, 2009, 24(3): 86-92. |
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2013, Vol. 28 
