Restraint Scheme of Transformer Zero Sequence Differential Protection Based on Tanimoto Similarity

doi:10.11930/j.issn.1004-9649.202302076

Abstract

Abstract: As one of the important transformer protections, zero sequence differential protection has the advantages of high sensitivity and strong anti-interference ability. The comparison object of its protection criterion is the self-generated zero sequence current and neutral zero sequence current obtained by the sum of three phase currents on the side of the three-phase incoming line. The difference of saturation characteristics between the three phase incoming-line side CT and the neutral side NCT will cause errors of zero sequence current transmission. The zero sequence current waveform after CT transmission will produce distortion in different degrees, which leads to the generation of false differential current, and then causes the misoperation of zero sequence differential protection. To solve this problem, on the basis of an analysis of the magnitude and phase characteristics of zero sequence current on both sides after CT transmission under various working conditions, a Tanimoto similarity-based constraint scheme for transformer zero-sequence differential protection is proposed, and the effectiveness of the proposed constraint scheme is verified by simulation.

Key words: transformer zero sequence differential protection, CT saturation characteristics, magnetizing inrush current, Tanimoto similarity

ZHU Jia, WANG Feng, LI Yiquan, JIAO Shaolin, XU Xiaochun, ZHAO Qingchun. Restraint Scheme of Transformer Zero Sequence Differential Protection Based on Tanimoto Similarity[J]. Electric Power, 2023, 56(8): 193-199.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202302076

https://www.electricpower.com.cn/EN/Y2023/V56/I8/193

References

[1] 刘其常. 一起主变零序差动误动分析[J]. 中国水运(下半月), 2012, 12(11): 70–71
LIU Qichang. Analysis of a zero sequence differential malfunction of main transformer[J]. China Water Transport, 2012, 12(11): 70–71
[2] 王维俭. 变压器保护运行不良的反思[J]. 电力自动化设备, 2001, 21(10): 1–3
WANG Weijian. Consideration on the improper operation of transformer protection[J]. Electric Power Automation Equipment, 2001, 21(10): 1–3
[3] 王维俭. 再谈220 kV及以上大型变压器装设零序差动保护的必要性[J]. 电力自动化设备, 2003, 23(4): 1–5
WANG Weijian. Necessity of zero-sequence differential protection for large-sized transformer[J]. Electric Power Automation Equipment, 2003, 23(4): 1–5
[4] 罗小莉, 赵安国, 郭晓冬. 新型变压器零序差动保护方案设计[J]. 电力自动化设备, 2007, 27(7): 119–121
LUO Xiaoli, ZHAO Anguo, GUO Xiaodong. Scheme design of transformer zero-sequence differential protection[J]. Electric Power Automation Equipment, 2007, 27(7): 119–121
[5] 石恒初. 500 kV变压器零序差动保护误动事故分析[J]. 电工技术, 2012(5): 15–16, 24
SHI Hengchu. Analysis of misoperation accident of zero sequence differential protection of 500 kV transformer[J]. Electric Engineering, 2012(5): 15–16, 24
[6] 兀鹏越, 王团结, 许寅智, 等. 500 kV主变零差保护的现场投运试验及分析[J]. 华北电力技术, 2011(11): 8–11
WU Pengyue, WANG Tuanjie, XU Yinzhi, et al. Field test and analysis of 500 kV transformer zero-sequence differential protection[J]. North China Electric Power, 2011(11): 8–11
[7] 詹勤辉, 王世祥, 张胜宝. 一起500 kV主变零差保护误动原因分析及预防措施[J]. 继电器, 2007, 35(24): 71–73
ZHAN Qinhui, WANG Shixiang, ZHANG Shengbao. Analysis of a 500 kV transformer zero-sequence differential protection fault and its prevention[J]. Relay, 2007, 35(24): 71–73
[8] WENG H L, GUO Y D, LIU Y K, et al. Normalized dynamic time warping distance based auxiliary restraint scheme for restricted earth fault protection of converter transformers[J]. IEEE Transactions on Power Delivery, 2022, 37(3): 1476–1487.
[9] ZHENG T, YANG X H, GUO X C, et al. Zero-sequence differential current protection scheme for converter transformer based on waveform correlation analysis[J]. Energies, 2020, 13(7): 1814.
[10] 陆明, 薛磊, 余江, 等. 变压器零序差动保护的分析和改进[J]. 南方电网技术, 2018, 12(10): 35–40
LU Ming, XUE Lei, YU Jiang, et al. Analysis and improvement of zero sequence differential protection for transformer[J]. Southern Power System Technology, 2018, 12(10): 35–40
[11] 吴大立, 尹项根, 张哲, 等. 基于负序电流判别的变压器差动保护零序电流自动补偿方法[J]. 电力自动化设备, 2007, 27(2): 28–31
WU Dali, YIN Xianggen, ZHANG Zhe, et al. Zero-sequence Current automatic compensation of transformer differential protection based on negative-sequence current[J]. Electric Power Automation Equipment, 2007, 27(2): 28–31
[12] 罗美玲, 国兴超, 于晓军, 等. 基于波形相关性分析的换流变压器零序差动保护方案[J]. 电力系统保护与控制, 2020, 48(12): 80–89
LUO Meiling, GUO Xingchao, YU Xiaojun, et al. Zero-sequence differential protection scheme for a converter transformer based on waveform correlation analysis[J]. Power System Protection and Control, 2020, 48(12): 80–89
[13] KRSTIVOJEVIC J, DJURIC M. A new algorithm for avoiding maloperation of transformer restricted earth fault protection caused by the transformer magnetizing inrush current and current transformer saturation[J]. Turkish Journal of Electrical Engineering & Computer Sciences, 2016, 24: 5025–5042.
[14] 鲁俊生. 交直流深度耦合下变压器差动类保护动作性能分析及新原理研究[D]. 武汉: 华中科技大学, 2016.
LU Junsheng. Performance analysis and new principle research of transformer differential protection under AC-DC deep coupling[D]. Wuhan: Huazhong University of Science and Technology, 2016.
[15] 谢创树. 核电厂变压器零序差动保护配置及其整定计算[J]. 南方能源建设, 2015, 2(4): 74–80
XIE Chuangshu. Design and setting of zero-sequence current differential protection for transformers in nuclear power plants[J]. Southern Energy Construction, 2015, 2(4): 74–80
[16] 翁汉琍, 郭祎达, 李昊威, 等. 涌流工况下换流变压器零序差动保护误动对策[J]. 电力系统自动化, 2020, 44(23): 143–149
WENG Hanli, GUO Yida, LI Haowei, et al. Countermeasures for mal-operation of zero-sequence differential protection of converter transformer under inrush current condition[J]. Automation of Electric Power Systems, 2020, 44(23): 143–149
[17] 李昊威. 复杂电磁暂态下换流变零序差动保护动作性能分析及对策研究[D]. 宜昌: 三峡大学, 2020.
LI Haowei. Performance analysis and countermeasure research of zero sequence differential protection of converter transformer under complex electromagnetic transient[D]. Yichang: China Three Gorges University, 2020.
[18] 王虹富, 穆世霞, 王兰香, 等. 考虑励磁非线性的通用变压器及其故障电磁暂态模型[J]. 智慧电力, 2017, 45(9): 60–67
WANG Hongfu, MU Shixia, WANG Lanxiang, et al. Electromagnetic transient model of transformer and its fault state considering nonlinear exciting branch[J]. Smart Power, 2017, 45(9): 60–67
[19] 李梅, 唐菊生. 基于综合制动判据的变压器差动保护研究[J]. 电力科学与技术学报, 2020, 35(2): 135–141
LI Mei, TANG Jusheng. Transformer differential protection method based on the comprehensive braking criterion[J]. Journal of Electric Power Science and Technology, 2020, 35(2): 135–141
[20] 曾耀吾, 李晓松, 陈萌, 等. 机车牵引变压器空载合闸励磁涌流特性分析[J]. 电力科学与技术学报, 2013, 28(4): 19–23, 30
ZENG Yaowu, LI Xiaosong, CHEN Meng, et al. Magnetizing inrush current characteristics of locomotive traction transformer no-load switching[J]. Journal of Electric Power Science and Technology, 2013, 28(4): 19–23, 30
[21] 吕宁. 变压器差动保护中励磁涌流和CT饱和问题的研究[D]. 北京: 华北电力大学(北京), 2009
LV Ning. Research on inrush current and CT saturation in transformer differential protection[D]. Beijing: North China Electric Power University, 2009.
[22] 徐艳春, 范钟耀, 孙思涵, 等. 基于去趋势分析的大规模双馈风电场送出变压器差动保护[J]. 中国电力, 2023, 56(7): 186–197
XU Yanchun, FAN Zhongyao, SUN Sihan, et al. Differential protection of transmission transformer for large-scale doubly-fed wind farms based on detrended analysis[J]. Electric Power, 2023, 56(7): 186–197
[23] 李海涛, 刘北阳, 滕文涛, 等. 基于可变合闸角的变压器励磁涌流抑制方法[J]. 中国电力, 2022, 55(9): 70–78
LI Haitao, LIU Beiyan, TENG Wentao, et al. Research on inrush current suppression of transformer based on changeable closing angle[J]. Electric Power, 2022, 55(9): 70–78
[24] 胡勇, 郑黎明, 贾科, 等. 基于Tanimoto相似度的光伏场站送出线路纵联保护[J]. 电力系统保护与控制, 2021, 49(3): 74–79
HU Yong, ZHENG Liming, JIA Ke, et al. Pilot protection based on Tanimoto similarity for a photovoltaic station transmission line[J]. Power System Protection and Control, 2021, 49(3): 74–79
[25] 翁汉琍, 陈皓, 万毅, 等. 基于巴氏系数的变压器励磁涌流和故障差流识别新判据[J]. 电力系统保护与控制, 2020, 48(10): 113–122
WENG Hanli, CHEN Hao, WAN Yi, et al. A novel criterion to distinguish inrush current from fault current based on the Bhattacharyya coefficient[J]. Power System Protection and Control, 2020, 48(10): 113–122
[26] 张运驰, 高厚磊, 杜士昌. 基于综合形态算法的变压器励磁涌流识别方法[J]. 电力系统自动化, 2021, 45(24): 165–173
ZHANG Yunchi, GAO Houlei, DU Shichang. Identification method of transformer magnetizing inrush current based on comprehensive morphological algorithm[J]. Automation of Electric Power Systems, 2021, 45(24): 165–173