地区电网采用不换位架设方式的高压输电线路潜供电流分析.pdfVIP

高电压技术第 39 卷第6 期 2013 年 6 月 30 日 High Voltage Engineering , Vo l. 39 , No. 6 , June 30 , 2013 1501 地区电网采用不换位架设方式的 高压输电线路潜供电流分析 李晓华l ，谢金泉1 ，罗龙泼1 ，张波1 ，李艳2 (1.华南理工大学电力学院，广州 510640;2. 深圳供电局有限公司，深圳 518001) 摘 要:输电线路的不换位架设会造成其电气参数三相不对称，使得潜供电流呈现明显的分相特性，已成为影响 单相自动重合阁成功率的一个重要因素。针对这个问题，建立了不换位高压线路潜供电流的计算模型，通过 EMTDC 电磁暂态仿真软件对单回线路和双回线路分别研究了相序排列方式、故障相别和输送潮流对线路潜供电 流的影响。结果表明，线路不换位导致电气参数不对称是引起潜供电流增大的根本原因，故障点位置以及输送潮 流对潜供电流具有重要影响。为使潜供电流保持在→个较低的水平，建议不换位同杆双回线路采用同相序架设。 关键词:潜供电流;不换位;电容精合;电感藕合;输送潮流;相序排列方式;单相自动重合闸 001: 10. 3969/j. issn. 1003-6520. 2013. 06. 031 文章编号: 1003-6520(2013)06-1501-08 Analysis of Secondary Arc Current on Un-transposed High Voltage Transmission Lines in Regional Power Grid LI Xiaohual , XIE Jinquan 1 , LUO Longbol , ZHANG BOI , LI Yan2 (1. School of Electric Power , South China University of Technology , Guangzhou 510640 , China; 2. Shenzhen Power Supply Bureau Co. , Ltd. , Shenzhen 51800 1, China) Abstract: The asymmetry of transmission line parameters caused by the line un-transposition makes the secondary arc current to be obvious phase characteristics , and becomes an important factor affecting the success rate of the single-phase automatic reclosure. To solve this problem , we estab !ished a model of a high voltage{ HV) transmission line with two sources , by which the secondary arc current was calculated by the EMTDC software for both single circuit and double circuit transmission lines. By the calculation , the effects of phase sequences ,fault phase and power flow on secondary arc current were discussed , respectively. The results show that the asymmetry of the electrical parameters is the primary