刘健,朱青松,王毅钊,张志华,陈洁羽
LIU Jian,ZHU Qingsong,WANG Yizhao,ZHANG Zhihua,CHEN Jieyu

• 1:国网陕西省电力有限公司电力科学研究院
• 2:西安理工大学电气工程学院

摘要(Abstract)：

为了利用已有硬件资源提高小电阻接地系统单相接地选线性能，研究了基于变电站自动化系统的全局稳态监测信息用于单相接地选线的方法。推导单相接地时母线零序电压和各条线路的零序电流，计算极端情况下单相接地故障线路与健全线路的零序电流幅值之比，提出单相接地选线方法，指出以线路的零序电流作为单相接地选线的启动条件，并给出零序电流的整定原则，计算零序电流整定值下能够启动的最大过渡电阻。结合实例对所提方法进行验证，结果表明利用变电站自动化系统的稳态监测信息能够显著提升小电阻接地系统单相接地检测性能。
In order to use the existing hardware sources to improve the line selection performance of single-phase grounding fault of small resistance grounding systems, a method for line selection of single-phase grounding fault based on the global steady-state monitoring information of the substation automation system is investigated. The zerosequence voltage of the busbar and the zero-sequence current of each line in the case of single-phase grounding faults are deduced. The ratio of zero-sequence current of lines with single-phase grounding faults to that of non-fault lines under extreme conditions is analyzed. Moreover, the line selection method of single-phase grounding fault is proposed. The zero-sequence current is used as the starting criterion for line selection of single-phase grounding fault, and the setting principle of zero-sequence principle is introduced to calculate the maximum transition resistance that can be started under the setting value of zero-sequence current. An example is given to illustrate the proposed method, and the results show that the steady-state monitoring information of the substation automation system can remarkably improved the detection performance of single-phase grounding fault of small resistance grounding systems.

关键词(KeyWords)： 配电网;小电阻接地系统;单相接地选线;遥测综合误差;变电站自动化
distribution networks;small resistance grounding system;line selection of single-phase grounding fault;comprehensive telemetry error;substation automation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（U1766208）

作者(Author): 刘健,朱青松,王毅钊,张志华,陈洁羽
LIU Jian,ZHU Qingsong,WANG Yizhao,ZHANG Zhihua,CHEN Jieyu

DOI: 10.19585/j.zjdl.202304001

参考文献(References)：

• [1]刘健，宋国兵，张志华.配电网单相接地故障处理[M].北京：中国水利水电出版社，2018.
• [2]林志超，刘鑫星，王英民，等.基于零序电流比较的小电阻接地系统接地故障保护[J].电力系统保护与控制，2018,46(22):15-21.LIN Zhichao,LIU Xinxing,WANG Yingmin,et al.Grounding fault protection based on zero sequence current comparison in low resistance grounding system[J].Power System Protection and Control,2018,46(22):15-21.
• [3]薛永端，刘珊，王艳松，等.基于零序电压比率制动的小电阻接地系统接地保护[J].电力系统自动化，2016,40(16):112-117.XUE Yongduan,LIU Shan,WANG Yansong,et al.Grounding fault protection in low resistance grounding system based on zero-sequence voltage ratio restraint[J].Automation of Electric Power Systems,2016,40(16):112-117.
• [4]刘健，董新洲，陈星莺.配电网故障定位与供电恢复[M].北京：中国电力出版社，2012.
• [5]盛亚如，丛伟，卜祥海，等.基于中性点电流与零序电流投影量差动的小电阻接地系统高阻接地故障判断方法[J].电力自动化设备，2019,39(3):17-22.SHENG Yaru,CONG Wei,BU Xianghai,et al.Detection method of high impedance grounding fault based on differential current of zero-sequence current projection and neutral point current in low-resistance grounding system[J].Electric Power Automation Equipment,2019,39(3):17-22.
• [6]任伟，薛永端，徐丙垠，等.小电阻接地系统高阻接地故障纵联差动保护[J].电网技术，2021,45(8):3276-3282.REN Wei,XUE Yongduan,XU Bingyin,et al.Longitudinal differential protection of high resistance grounding faults in low-resistance grounding system[J].Power System Technology,2021,45(8):3276-3282.
• [7]杨帆，刘鑫星，沈煜，等.基于零序电流投影系数的小电阻接地系统高阻接地故障保护[J].电网技术，2020,44(3):1128-1133.YANG Fan,LIU Xinxing,SHEN Yu,et al. High resistance ground fault protection of low resistance grounding system based on zero sequence current projection coefficient[J].Power System Technology,2020,44(3):1128-1133.
• [8]薛永端，汪洋，徐丙垠.小电阻接地系统高灵敏度阶段式零序过电流保护[J].中国电机工程学报，2020,40(19):6217-6227.XUE Yongduan,WANG Yang,XU Bingyin.High sensitive zero-sequence stage current protection for lowresistance grounding system[J].Proceedings of the CSEE,2020,40(19):6217-6227.
• [9]肖瑞超，徐涵.基于零序电流-电压波形相似度的小电阻接地系统高阻接地故障检测方法[J].机电工程技术，2021,50(12):64-67.XIAO Ruichao,XU Han.High-resistance grounding fault detection in low-resistance grounding system based on similarity difference of zero-sequence current-voltage waveform[J].Mechanical&Electrical Engineering Technology,2021,50(12):64-67.
• [10]廖芳群，李海锋，陈嘉权，等.小电阻接地系统高灵敏性接地故障区段定位方法[J].电力系统保护与控制，2021,49(21):150-158.LIAO Fangqun,LI Haifeng,CHEN Jiaquan,et al. High sensitive ground fault location in a low-resistance grounded system[J].Power System Protection and Control,2021,49(21):150-158.
• [11]耿建昭，王宾，董新洲，等.中性点有效接地配电网高阻接地故障特征分析及检测[J].电力系统自动化，2013,37(16):85-91.GENG Jianzhao,WANG Bin,DONG Xinzhou,et al.Analysis and detection of high impedance grounding fault in neutral point effectively grounding distribution network[J]. Automation of Electric Power Systems,2013,37(16):85-91.
• [12]王宾，崔鑫，董新洲.配电线路弧光高阻故障检测技术综述[J].中国电机工程学报，2020,40(1):96-107.WANG Bin,CUI Xin,DONG Xinzhou.Overview of arc high impedance grounding fault detection technologies in distribution system[J].Proceedings of the CSEE,2020,40(1):96-107.
• [13]汪洋，薛永端，徐丙垠，等.小电阻接地系统接地故障反时限零序过电流保护[J].电力系统自动化，2018,42(20):150-157.WANG Yang,XUE Yongduan,XU Bingyin,et al.Zerosequence inverse-time overcurrent protection in low resistance grounding system with grounding fault[J].Automation of Electric Power Systems,2018,42(20):150-157.
• [14]李雯，庄朋成，陈云飞，等.变电站联络电缆接地电流缺陷分析[J].山东电力技术，2022,49(6):56-60.LI Wen,ZHUANG Pengcheng,CHEN Yunfei,et al.Analysis of substation Tie cable grounding current defect[J].Shandong Electric Power,2022,49(6):56-60.
• [15]许利姣，苏建成，方惠玲.小电阻接地系统零序电流保护定值设置存在问题及对策[J].内蒙古电力技术，2021,39(3):95-97.XU Lijiao,SU Jiancheng,FANG Huiling.Issues existing in zero sequence current protection setting value in small resistance grounding system and its countermeasures[J].Inner Mongolia Electric Power,2021,39(3):95-97.
• [16]吴娜，刘子晖，樊淑娴.基于Pearson相关性的小电阻接地有源配电网接地保护[J].电测与仪表，2021,58(4):136-143.WU Na,LIU Zihui,FAN Shuxian. Grounding protection of low resistance grounding active distribution network based on Pearson correlation[J]. Electrical Measurement&Instrumentation,2021,58(4):136-143.
• [17]水利电力部西北电力设计院.电力工程电气设计手册第一册：电气一次部分[M].北京：中国电力出版社，1989.
• [18]中华人民共和国国家发展和改革委员会.导体和电器选择设计技术规定：DL/T 5222—2005[S].北京：中国电力出版社，2005.
• [19]国家市场监督管理总局，国家标准化管理委员会.互感器试验导则第1部分：电流互感器：GB/T 22071.1—2018[S].北京：中国标准出版社，2018.
• [20]国家能源局.智能变电站设计技术规定：DL/T 5510—2016[S].北京：中国电力出版社，2016.
• [21]国家能源局.电流互感器和电压互感器选择及计算规程：DL/T 866—2015[S].北京：中国电力出版社，2015.