500 kV同塔四回线路电气不平衡度的研究 |
| |
引用本文: | 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].电力技术,2014(1):23-27. |
| |
作者姓名: | 麻敏华 汪晶毅 李志泰 潘春平 |
| |
作者单位: | [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 |
| |
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 |
Research on Electric Unbalance Degree of 500 kV Four Circuits on the Same Tower |
| |
Authors: | MA Min-hua WANG Jing-yi LI Zhi-tai PAN Chun-ping |
| |
Affiliation: | 1.Grid Planning and Research Center of Guangdong Power Grid Corporation, Guangzhou 510080, China; 2.Guangdong Electric Power Design Institute, Guangzhou 510663, China;) |
| |
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. |
| |
Keywords: | 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 |
本文献已被 维普 等数据库收录! |
|