500 kV输电线路绝缘地线雷电流分布

doi:10.11930/j.issn.1004-9649.201606210

摘要/Abstract

摘要： 对于重覆冰区域的输电线路来说，地线覆冰会严重威胁到线路的安全运行。采用绝缘地线直流融冰的方式是解决架空地线覆冰问题的方法之一。当输电线路发生雷击事故时，直流融冰采用的绝缘地线与杆塔之间的雷电流分布情况决定了杆塔的塔顶电位，影响着杆塔的耐雷水平与线路防雷接地的保护。利用电磁暂态软件EMTP，对杆塔和绝缘地线中的雷电流分布进行了计算分析。计算结果表明，在500 kV输电线路中，雷电流主要通过杆塔流入大地，雷电流的幅值、杆塔档距、接地电阻的大小、地线结构、直径以及地线接地方式等对绝缘地线和杆塔分流情况有重要的影响。计算结果可为绝缘地线分流系数和杆塔分流系数的研究提供重要的参考价值，并有利于指导输电线路的优化设计。

关键词: 输电线路, 绝缘地线, 雷电流分布, EMTP, 分流系数

Abstract: Ground wire icing severely affects the safeoperation of overhead transmission line in medium and heavyicing area. Direct Current (DC) melting ice is one of the effectivemeasures to solve overhead transmission line icing. When lightning stroke failure of the transmission line occurs, the lightning current distribution between insulated ground wire and towers decide the top potential of tower, which has impacts on lightning protection level and the grounding of transmission line. This paper uses the electromagnetic transient analysis program EMTP to calculate and analyze the lightning current distribution. The results show that the majority of lightning current pass through the towers in 500 kV transmission line, and lightning current amplitude, horizontal span of tower and grounding resistance have a greater impact on shunt coefficient of insulated ground wire and tower. This research has a significant theoretically value to tower shunt coefficient, potential's increase tower and economical design of power system.

Key words: transmission line, insulated ground wire, lightning current distribution, EMTP, shunt coefficient

中图分类号:

TM752

汤涛, 向城名. 500 kV输电线路绝缘地线雷电流分布[J]. 中国电力, 2018, 51(1): 64-70.

TANG Tao, XIANG Chengming. Lightning Current Distribution of Insulated Ground Wire in 500 kV Transmission Line[J]. Electric Power, 2018, 51(1): 64-70.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201606210

https://www.electricpower.com.cn/CN/Y2018/V51/I1/64

参考文献

[1] 李再华,白晓民,周子冠,等. 电网覆冰防治方法和研究进展[J]. 电网技术,2008,32(4):7-13. LI Zaihua, BAI Xiaomin, ZHOU Ziguan, et al. Prevention and treatment methods of ice coating in power networks and its recent study[J]. Power System Technology, 2008, 32(4):7-13.
[2] 张文亮,于永清,宿志一,等. 湖南电网2008年冰雪灾害调研分析[J]. 电网技术,2008,32(8):1-5. ZHANG Wenliang, YU Yongqing, SU Zhiyi, et al. Investigation andanalysis of icing and snowing disaster happened in Hunan power grid in 2008[J]. Power System Technology, 2008, 32(8):1-5.
[3] 孙才新,蒋兴良,熊启新,等. 导线覆冰及其干湿增长临界条件分析[J]. 中国电机工程学会会议,2003,23(3):141-145. SUN Caixin, JIANG Xingliang, XIONG Qixin, et al. Analysis of criticalicing conditions of conductor and wet-dry grown[J]. Proceedings of the CSEE, 2003, 23(3):141-145.
[4] 武守远,荆平. 输电线路直流融冰关键技术[M]. 北京:中国电力出版社,2014.
[5] 李庆峰,范峥,吴穹,等. 全国输电线路覆冰情况调研及事故分析[J]. 电网技术,2008,32(9):33-36. LI Qingfeng, FAN Zheng, WU Qiong, et al. Investigation of ice covered ransmission lines and analysis on transmission line failures caused by ice-coating in China[J]. Power System Technology, 2008, 32(9):33-36.
[6] 宿志一. 直流绝缘子串覆冰闪络特性[R]. 北京:中国电力科学研究院,2004.
[7] 陈义刚,范松海. 架空地线的绝缘化改造及融冰方法[J]. 四川电力技术,2012, 35(3):74-76. CHEN Yigang, FAN Songhai. Insulation reconstruction of overhead earth wire and ice melting method[J]. Sichuan Electric Power Technology, 2012, 35(3):74-76.
[8] 李本良,袁兆祥,惠旭,等. 降低高压交流输电线路避雷线损耗的运行方式[J]. 电网技术,2011,35(3):98-102. LI Benliang, YUAN Zhaoxiang, HUI Xu, et al. Operation mode of ground wire to reduce ground wire loss of HVAC transmission lines[J]. Power System Technology, 2011, 35(3):98-102.
[9] 赵丹丹,韩政,郭洁,等. 架空地线接地方式及损耗研究[J]. 高压电器,2013,49(2):67-73. ZHAO Dandan, HAN Zheng, GUO Jie, et al. Grounding models and electric loss of overhead ground wire[J]. High Voltage Apparatus, 2013, 49(2):67-73.
[10] 何金良,张波,曾嵘,等. 1000 kV特高压变电站接地系统的设计[J]. 中国电机工程学报,2009,29(7):7-12. HE Jinliang, ZHANG Bo, ZENG Rong, et al. Grounding system design of 1000 kV ultra-high voltage substation[J]. Proceedings of the CSEE, 2009, 29(7):7-12.
[11] 陈奎,曹晓斌,吴广宁,等. 超高压输电线路融冰绝缘地线单相短路电流分析[J]. 电网技术,2014,38(11):3266-3270. CHEN Kui, CAO Xiaobin, WU Guangning, et al. Analysis on single-phase short-circuit current in insulated ground wire during ice-melting of EHVAC transmission lines[J]. Power System Technology, 2014, 38(11):3266-3270.
[12] 宋立军,蒋陶宁,邹军,等. 特高压交流输电线路地线绝缘间隙电压的研究[J]. 电网技术,2013,37(3):686-691. SONG Lijun, JIANG Taoning, ZOU Jun, et al. Research on voltages across both terminals of ground wire insulation gap for UHVAC transmission line[J]. Power System Technology, 2013, 37(3):686-691.
[13] 王晓彤,班连庚,朱普轩,等. 750 kV同塔同窗同相序双回紧凑型线路的潜供电流和感应电压[J]. 电网技术,2011,35(1),90-96. WANG Xiaotong, BAN Liangeng, ZHU Puxuan, et al. Research on secondary-arc currents and induced voltages for 750 kV compact double-circuit transmission lines on the same tower with the same phase sequence in the same tower window[J]. Power System Technology, 2011, 35(1):90-96.
[14] 王巨丰,齐冲,车诒颖,等. 110 kV高压输电线路杆塔分流系数的研究[J]. 高电压技术, 2007,33(3):46-49. WANG Jufeng, QI Chong, CHE Yiying, et al. Research on lightning current shunt coefficient of tower on 110 kV high voltage transmission line[J]. High Voltage Engineering, 2007, 33(3):46-49.
[15] 陈奎,曹晓斌,吴广宁,等. 避雷线绝缘架设对杆塔雷电流分配的影响[J]. 电力自动化设备,2016,36(2):136-140. CHEN Kui, CAO Xiaobin, WU Guangning, et al. Impact of grounding wire insulation erection on lightning current shunting of tower[J]. Electric Power Automation Equipment, 2016, 36(2):136-140.
[16] 黄旭峰. 光纤复合架空地线接地方式的改进[J]. 高电压技术,2010,36(2):356-364. HUANG Xufeng. Improvement of the grounding method of OPGW[J]. High Voltage Engineering, 2010, 36(2):356-364.
[17] 徐望圣,严国志. 输电线路地线直流融冰技术与应用[M]. 武汉:武汉大学出版社,2015.
[18] 李特,周国良,刘岩,等. 220 kV玻璃绝缘子并联间隙雷电冲击放电路径研究[J]. 中国电力,2015,48(8):92-96. LI Te, ZHOU Guoliang, LIU Yan, et al. Lightning discharge character of shunt gap used for 220 kV glass insulator string[J]. Electric Power, 2015, 48(8):92-96.
[19] 陈丛丛,张小青. 雷电波的衰减与变形问题研究[J]. 中国电力,2013,46(12):12-15. CHEN Congcong, ZHANG Xiaoqing. Research on attenuation and distortion problems of lightning overvoltage[J]. Electric Power, 2013, 46(12):12-15.
[20] 端木林楠,余占清,彭珑,等. 多通道雷电流在线监测系统的研发和应用[J]. 中国电力,2015,48(2):49-51. DUANMU Linnan, YU Zhanqing, PENG Long, et al. Development and application of multi-channel lightning current on-line monitoring system[J]. Electric Power, 2015, 48(2):49-51.
[21] 方玉群,徐飞明,顾浩,等. 500 kV线路地线绝缘子间隙烧伤研究[J]. 中国电力,2015,48(7):153-160. FANG Yuqun, XU Feiming, GU Hao, et al. Research on parallel gap burn of ground wire insulator for 500 kV transmission lines[J]. Electric Power, 2015, 48(7):153-160.