基于综合制动判据的变压器差动保护研究
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通讯作者:

李梅(1978),女,硕士,副教授,主要从事电力系统保护与控制的研究;Email:limumei78@126.com

中图分类号:

TM772

基金项目:

国家电网有限公司总部科技项目(SGAHDK00DJJS1900077)


Transformer differential protection method based on the comprehensive braking criterion
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    摘要:

    变压器差动保护的核心问题是如何鉴别励磁涌流与区内短路电流,防止保护误动作。该文针对传统二次谐波幅值比识别励磁涌流的方法存在判据单一、精确性不足、在某些情况下可能造成误动的问题进行改进,增加相位差判别的方法,并结合比率制动组建综合制动判据。利用MATLAB软件中Simulink实现模块的构建,对变压器在不同的运行情况下进行仿真校验。仿真结果表明:该判据不仅能够区分不同情况下的短路故障,而且能够有效地识别励磁涌流,并对变压器不同的故障类型作出相应的保护动作。

    Abstract:

    The key problem of transformer differential protection method is the method to distinguish the inrush current from short circuit current in order to prevent misoperation. The traditional method based on two harmonics amplitude ratios has a single criterion and insufficient accuracy, and thus it may cause a misoperation in some conditions. On this background, the method of phase difference discrimination is improved, and the braking ratio is utilized to set up a comprehensive braking criterion. Simulation modules are modeled in Matlab/Simulink and the transformer is simulated and checked under different operating conditions. It is shown that the criterion not only distinguish short circuit faults in different situations, but also recognize inrush currents effectively, and make corresponding protection actions for different fault types of transformers.

    参考文献
    [1] 谷君.变压器差动保护误动的影响因素分析与对策研究[D].保定:华北电力大学,2012.
    [2] 尹忠东,魏文思.基于有限元算法的变压器绕组涡流效应分析及损耗计算[J].智慧电力,2018,46(5):7177.YIN Zhongdong,WEI Wensi.Analysis of eddy current effect and loss calculation of transformer winding based on finite element algorithm[J].Smart Power,2018,46(5):7177.
    [3] 李应文,刘涛,裴东良,等.1 000 kV特高压主变压器差动保护配置分析[J].电力科学与技术学报,2017,32(3):106113.LI Yingwen,LIU Tao,PEI Dongliang,et al.Configuration analysis on current differential protection for 1 000 kV UHV transformer[J].Journal of Electric Power Science and Technology,2017,32(3):106113.
    [4] 张瑞,甘战,张鹏,等.换流变压器空载励磁涌流选相关合控制策略[J].电力系统保护与控制,2019,47(15):6977.ZHANG Rui,GAN Zhan,ZHANG Peng,et al.Controlled switching strategies to eliminate the inrush current of converter transformer[J].Power System Protection and Control,2019,47(15):6977.
    [5] 马静,王增平,吴劼.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):166171.MA Jing,WANG Zengping,WU Ji.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):166171.
    [6] 李贞,张明珠,倪传坤,等.变压器励磁涌流的自适应二次谐波分相制动方案[J].电力系统自动化,2013,37(6):121124.LI Zhen,ZHANG Mingzhu,NI Chuankun,et al.An adaptive secondary harmonic splitphase restrained scheme for magnetizing inrush current in transformers[J].Automation of Electric Power Systems,2013,37(6):121124.
    [7] 吴成明,张鑫,鲁月娥,等.变压器差动保护二次谐波制动仿真分析[J].电气开关,2016,5(6):14.WU Chengming,ZHANG Xin,LU Yuee,et al.Simulation analysis of second harmonic brake of differential protection of a transformer[J].Electric Switchgear,2016,5(6):14.
    [8] 曾麟钧,林湘宁,黄景光,等.特高压自耦变压器的建模和电磁暂态仿真[J].中国电机工程学报,2010,30(1):9197.ZENG Linjun,LIN Xiangning,HUANG Jingguang,et al.Modeling and electromagnetic transient simulation of UHV autotransformer[J].Proceedings of the CSEE,2010,30(1):9197.
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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.

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  • 在线发布日期: 2020-09-03
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