Protection for Transformer in AC-DC Hybrid Operation Mode Based on Leakage Inductance Identification
Pan Chao1, Jin Mingquan1, Cai Guowei1, Zhao Chunfang2
1. School of Electrical Engineering Northeast Electrical Power University Jilin 132012 China; 2. School of Electrical Engineering Shenyang University of Technology Shenyang 110870 China;
Abstract：In this paper, the protection strategy is researched based on electromagnetic coupling mechanism for DC-biased transformer. The circuit equation of transformer is established with DC disturbance. Combined with the time-domain difference principle of port-measured information, the identification method of dynamic leakage inductance is studied. On this basis, the protection criterion is proposed considering the DC disturbance. By using time-domain field-circuit coupling method, the electromagnetic characteristics of transformer are analyzed under different operation situations. The abnormal features of the DC-biased transformer are characterized by the key electromagnetic parameters such as exciting current, dynamic inductance and leakage inductance. Then the fluctuations of the key parameters are summarized, and the changing regulation is hence concluded. With dynamic model test platform set, the applicability of different criteria is studied under different DC levels. The DC-disturbance protection principle of transformer is presented based on the single-side leakage inductance parameter identification. The accuracy and feasibility of the proposed method is verified by simulation analysis and dynamic model experiment.
潘超, 金明权, 蔡国伟, 赵春芳. 基于漏感辨识的变压器交直流混合运行保护方法[J]. 电工技术学报, 2018, 33(4): 771-780.
Pan Chao, Jin Mingquan, Cai Guowei, Zhao Chunfang. Protection for Transformer in AC-DC Hybrid Operation Mode Based on Leakage Inductance Identification. Transactions of China Electrotechnical Society, 2018, 33(4): 771-780.
[1] M Saburo Tanaka, Hayaki Murata, Tomoya Hatsukade, et al. Imaging of magnetic nanoparticles using a second harmonic of magnetization with DC bias field[J]. IEEE Transactions on Magnetics, 2015, 51(2): 1-4. [2] Hiroyuki Kosai, Zafer Turgut, Tyler Bixel, et al.Performance comparison of finemet and metglas tape cores under non-sinusoidal waveforms with DC bias[J]. IEEE Transactions on Magnetics, 2016, 52(7): 1-4. [3] 陈国栋, 宋晋峰, 张亮, 等. 动态电压恢复器注入变压器的直流偏磁抑制策略[J]. 中国电机工程学报, 2014, 34(28): 138-143. Chen Guodong, Song Jinfeng, Zhang Liang, et al.Control strategy for eliminating DC magnetic flux in the injection transformer of a dynamic voltage restorer[J]. Proceedings of the CSEE, 2014, 34(28): 138-143. [4] Li Xiaoping, Wen Xishan, Markham Penn N, et al.Analysis of nonlinear characteristics for a three-phase five-limb transformer under DC bias[J]. IEEE Transactions on Delivery, 2010, 25(4): 2504-2510. [5] Price P R.Geomagnetically induced current effects on transformers[J]. IEEE Transactions on Power Delivery, 2012, 17(4): 1002-1008. [6] 潘超, 王泽忠, 李海龙, 等. 基于瞬态场路耦合模型的变压器直流偏磁计算[J]. 电工技术学报, 2013, 28(5): 174-181. Pan Chao, Wang Zezhong, Li Hailong, et al.DC-Bias calculation for single phase transformers based on transient field-circuit coupled model[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 174-181. [7] Bai Baodong, Chen Zhiwei, Chen Dezhi.DC bias elimination and integrated magnetic technology in power transformer[J]. IEEE Transactions on Magnetics, 2015, 51(11): 1-4. [8] 陈志伟, 白保东, 陈德志, 等. 电力变压器直流偏磁现象形成机理及一种抑制措施的研究[J]. 电工技术学报, 2015, 30(14): 208-214. Chen Zhiwei, Bai Baodong, Chen Dezhi, et al.Research on the formation mechanism and 9 suppression method of transformer DC bias[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 208-214. [9] 郑涛, 陈佩璐, 刘连光, 等. 地磁感应电流对电流互感器传变特性及差动保护的影响[J]. 电力系统自动化, 2013, 37(22): 84-89. Zheng Tao, Chen Peilu, Liu Lianguang, et al.Effects of geomagnetically induced current on transferring characteristics of current transformer and transformer differential protection[J]. Automation of Electric Power Systems, 2013, 37(22): 84-89. [10] 郑涛, 陈佩璐, 刘连光, 等. 计及直流偏磁的电流互感器传变特性对差动保护的影响[J]. 电力系统自动化, 2012, 36(20): 89-93. Zheng Tao, Chen Peilu, Liu Lianguang, et al.Transferring charateristics of current transformer affected by DC magnetic bias and its impact differential protection[J]. Automation of Electric Power Systems, 2012, 36(20): 89-93. [11] 王雪, 王增平. 基于波形时域分布特征的变压器励磁涌流识别[J]. 电工技术学报, 2012, 27(1): 148-154. Wang Xun, Wang Zengping.Identification of transformer inrush currents based on waveform distribution characteristics[J]. Transactions of China Electrotechnical Society, 2012, 27(1): 148-154. [12] 马静, 王增平, 吴劼, 等. 利用基波幅值变化特征快速识别励磁涌流和故障电流[J]. 电工技术学报, 2009, 24(6): 166-171. Ma Jing, Wang Zengping, Wu Jie, et al.A novel method to rapidly identify inrush current and internal fault current based on variation characteristic of fundamental current amplitude[J]. Transactions of China Electrotechnical Society, 2009, 24(6): 166-171. [13] 索南加乐, 许立强, 焦在滨, 等. 基于磁路特征的三相三柱式变压器励磁参数识别[J]. 中国电机工程学报, 2011, 31(19): 97-104. Suonan Jiale, Xu Liqiang, Jiao Zaibin, et al.Identification method for excitation inductances of three-phase three-limb transformer based on characteristics of magnetic circuit[J]. Proceedings of the CSEE, 2011, 31(19): 97-104. [14] 焦在滨, 马涛, 屈亚军, 等. 基于励磁电感参数识别的快速变压器保护[J]. 中国电机工程学报, 2014, 34(10): 1658-1666. Jiao Zaibin, Ma Tao, Qu Yajun, et al.A novel excitation inductance-based power transformer protection scheme[J]. Proceedings of the CSEE, 2014, 34(10): 1658-1666. [15] 王增平, 马静. 基于等效瞬时漏感与回路方程的变压器保护原理[J]. 中国电机工程学报, 2007, 27(19): 39-44. Wang Zengping, Ma Jing.A novel principle of transformer protection based on equivalent instanta- neous leakage inductance and loop equation[J]. Proceedings of the CSEE, 2007, 27(19): 39-44. [16] 潘超, 王梦纯, 杨德友, 等. 变压器三维电磁场有限元计算问题的研究[J]. 东北电力大学学报, 2014, 34(2): 21-26. Pan Chao, Wang Mengchun, Yang Deyou, et al.Computing problem research based on finite element method for 3D electromagnetic analysis of trans- former[J]. Journal of Northeast Dianli University, 2014, 34(2): 21-26. [17] 潘超, 何雯婷, 郝文波, 等. 一种变压器时域场路耦合计算的自适应算法[J]. 电工技术学报, 2014, 29(12): 113-119. Pan Chao, He Wenting, Hao Wenbo, et al.A self- adaptive algorithm of time-domain magnetic field and electric circuit coupled computation for trans- former[J]. Transactions of China Electrotechnical Society, 2014, 29(12): 113-119. [18] 索南加乐, 王志恩, 焦在滨, 等. 基于变压器T形等效电路的漏电感参数特性分析[J]. 电力系统自动化, 2010, 34(11): 38-42, 112. Suonan Jiale, Wang Zhien, Jiao Zaibin, et al.Analysis of the leakage inductance parameter characteristics using the transformer T-equivalent circuit[J]. Automation of Electric Power Systems, 2010, 34(11): 38-42, 112. [19] Lin Xiangning, Huang Jingguang, Zeng Linjun, et al.Analysis of electromagnetic transient and ad-aptability of second-harmonic restraint based differ-rential protection of UHV power transformer[J]. IEEE Transa- ction on Power System, 2010, 25(4): 2299-2307. [20] 邓祥力, 高亮, 刘建峰, 等. 特高压变压器模型漏感参数的稳态识别方法[J]. 电工技术学报, 2014, 29(5): 254-260. Deng Xiangli, Gao Liang, Liu Jianfeng, et al.Steady- State parameter identification of UHV transformer model[J].Transactions of China Electrotechnical Society, 2014, 29(5): 254-260. [21] 郑涛, 陆格野, 赵彦杰, 等. 基于虚拟等效电感的特高压调压变压器励磁涌流判别算法[J]. 电工技术学报, 2016, 31(7): 118-125. Zheng Tao, Lun Geyie, Zhao Yanjie, et al.A discriminating algorithm for identifying inrush of UHV voltage-regulating transformer based on virtual equivalent inductance[J].Transactions of China Elec- trotechnical Society, 2016, 31(7): 118-125.
2018, Vol. 33 
