500 kV同塔四回线路电气不平衡度的研究

doi:10.11930/j.issn.1004-9649.2014.1.23.4

中国电力 ›› 2014, Vol. 47 ›› Issue (1): 23-27.DOI: 10.11930/j.issn.1004-9649.2014.1.23.4

500 kV同塔四回线路电气不平衡度的研究

麻敏华¹, 汪晶毅², 李志泰², 潘春平²

1.广东电网公司电网规划研究中心,广东广州 510080；
2.中国能源建设集团广东省电力设计研究院,广东广州 510663

收稿日期:2013-11-08 出版日期:2014-01-31 发布日期:2015-12-18
作者简介:麻敏华（1982-）,女,陕西凤翔人,硕士,工程师,从事电力系统规划及相关研究工作。E-mail: maminhua@gd.csg.cn

Research on Electric Unbalance Degree of 500 kV Four Circuits on the Same Tower

MA Min-hua¹, WANG Jing-yi², LI Zhi-tai², PAN Chun-ping²

1. Grid Planning and Research Center of Guangdong Power Grid Corporation, Guangzhou 510080, China;
2. Guangdong Electric Power Design Institute, Guangzhou 510663, China

Received:2013-11-08 Online:2014-01-31 Published:2015-12-18

摘要/Abstract

摘要： 为有效提高单位走廊的输送容量,同塔多回路输电技术得到越来越广泛的应用,但是由于换位困难,一旦相序布置不当将造成线路电气不平衡情况更为严重。采用ATP-EMTP和MATLAB程序对500 kV同塔四回路3层横担和6层横担2种塔型的电气不平衡度展开了较为全面的研究。综合考虑负序电压电流不平衡度、杆塔的雷击跳闸率、电磁环境等指标,建议3层横担塔型采用推荐的相序布置方式、6层横担塔型上下两个双回路均采用逆相序布置。计算还表明,对500 kV同塔四回路,单回路停电检修时的感应电压和电流较高,选择接地开关时应予以特别关注。

关键词: 500 kV同塔四回路, 电气不平衡度, 负序电压电流, 雷击跳闸率, 感应电压, 感应电流, 逆相序

Abstract: In order to increase transmission capacity of electric power corridor significantly, multi-circuit on the same tower was constructed more and more widely in developed area. However, it’s difficult to realize transposition for multi-circuit on the same tower because of complex conductors arrangement, and electric unbalance degree of the transmission lines would get worse if phases were arranged inappropriately. ATP-EMTP and Matlab programs were applied to electric unbalance degree calculation for the three-layer and six-layer cross-arms tower of 500 kV four circuits on the same tower. According to the comparison of negative sequence voltage and current, lightning trip-out rate and electromagnetic environment, better electric unbalance degree was achieved when commendatory phase arrangement was adopted on three-layer cross-arms tower and diverse phase sequence was chosen on six-layer cross-arms tower. The results also showed that induce voltage and induced current from energized circuits got high when single circuit was maintained. It should be paid much attention to isolated switches selection.

Key words: 500 kV four circuits on the same tower, electric unbalance degree, negative voltage and current, lightning trip-out rate, induced voltage, induced current, diverse phase sequence

中图分类号:

TM723

麻敏华, 汪晶毅, 李志泰, 潘春平. 500 kV同塔四回线路电气不平衡度的研究[J]. 中国电力, 2014, 47(1): 23-27.

MA Min-hua, WANG Jing-yi, LI Zhi-tai, PAN Chun-ping. Research on Electric Unbalance Degree of 500 kV Four Circuits on the Same Tower[J]. Electric Power, 2014, 47(1): 23-27.

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500 kV同塔四回线路电气不平衡度的研究

Research on Electric Unbalance Degree of 500 kV Four Circuits on the Same Tower

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500 kV同塔四回线路电气不平衡度的研究

Research on Electric Unbalance Degree of 500 kV Four Circuits on the Same Tower

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