广东500kV同塔四回线路相序排列的选择  

Selection of Phase Sequence Arrangement for Guangdong 500 kV Power Transmission Line Adopting Structure of Four Circuits on the Same Tower

作　　者：王晓彤[1] 林集明[1] 班连庚[1] 郑彬[1] 韩彬[1] 钟杰峰[2] 蔡广林[2] 朱志芳[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]广东省电力设计研究院,广东省广州市510663

出　　处：《电网技术》2009年第19期87-91,共5页Power System Technology

摘　　要：文章对采用水平型杆塔、各回路导线呈垂直排列的500kV同塔四回线路参数的不平衡度进行了分析,比较了不同相序排列下的潜供电流和恢复电压、感应电压和感应电流。对于杆塔内侧的五邑—南沙和江门—顺德线路,采用相序3时的感应电压和感应电流仅为采用相序1时的50%左右,其潜供电流和恢复电压也有所降低;而对于杆塔外侧的台山—上稔和糯扎渡—顺德线路,采用相序3时的电磁耦合感应电压和感应电压也低于采用相序1时的情况,其静电耦合感应电压和感应电流、潜供电流和恢复电压则差别不大。为此,推荐广东500kV同塔四回线路采用相序3排列方式。The parameter unbalance factor of 500 kV Guangdong transmission lines adopting the structure of four circuits on the same tower, in which the horizontal type tower is used and the conductors of each circuit are vertically arranged, is analyzed. The secondary-arc currents and recovery voltages as well as induced voltages and currents under different phase sequence arrangements are compared. For transmission lines from Wuyi to Nansha and from Jiangmen to Shunde located at the inner side of the tower, the induced voltages and induced currents under the third kind of phase sequence arrangement are about one half of that under the first kind of phase sequence arrangement, and the secondary-arc current and recovery voltage under the third kind of phase sequence arrangement are somewhat reduced; however, for transmission lines from Taishan to Shangren and from Nuozhadu to Shunde located at the outer side of the tower, the induced voltages and currents due to electromagnetic coupling under the third kind of phase sequence arrangement are also lower than those under the first kind of phase sequence arrangement, but the differences among induced voltages and currents due to electrostatic coupling as well as secondary-arc currents and recovery voltages under the two kinds of phase sequence arrangements are not evident. For these reasons, it is recommended to adopt the third kind of phase sequence arrangement for 500 kV Guangdong transmission lines adopting the structure of four circuits on the same tower.

关 键 词：电磁暂态程序 同塔四回线路 不平衡度 相序排列 潜供电流 感应电压 

分 类 号：TM751[电气工程—电力系统及自动化]