摘要
云广±800kV特高压直流线路是世界首条±800kV高压直流线路,它具有电压高、场强大和海拔高等特点,为保证该线路带电作业的安全展开,必须对其进行带电作业关键技术的研究。为此结合工程实际情况,在1:1的模拟塔上对典型作业位置的安全距离和组合间隙的放电特性进行了试验研究,同时采用合成场强仪对典型位置作业人员体表合成场进行了测量,利用有限元方法对高压直流输电线路离子流场进行了计算,并对电位转移时的转移电流进行了测量。根据试验及计算结果,得到了各典型作业位置的最小安全距离和最小组合间隙,总结了电场分布的特点并制定了场强安全防护措施。研究结果表明在±800kV特高压直流线路展开带电作业是安全的、可行的。
Yun-Guang DC ± 800 kV transmission line is the world＇s first DC ± 800 kV transmission line with characteristics of high voltage,strong electric field and high altitude.In order to ensure the safety of the live working on the transmission line,in light of the practice of the line,tests on safety distance and complex gap of typical locations in live working position were carried out at 1：1 ratio scale simulated tower.Meanwhile,the electric field intensity on the surface of human-body at typical working positions was measured by a multiple field strength measuring meter.Moreover,DC ion flow fields were simulated by the methods of FEM,and the transfer current were measured.Based on the results of the test and simulation,the minimum safety distance and complex gap of different typical working positions in live working were determined,the distribution of the electric field was summarized,and the appropriate protective measures were established.The results verify the safety and feasibility of live working on DC ±800 kV transmission line.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第9期2206-2211,共6页
High Voltage Engineering
基金
南方电网超高压输电公司科技项目(NWCGY-KJ-2007-28)~~
