特高压交流输电线路潜供电弧的抑制措施  

Secondary Arc Extinction Methods for UHVAC Transmission Lines

作　　者：林莘[1,2] 谢寅志[1,2] 徐建源[1,2] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]辽宁省电网安全运行与监测重点实验室,沈阳110870

出　　处：《高电压技术》2012年第9期2150-2156,共7页High Voltage Engineering

基　　金：高等学校博士学科点专项科研基金(20092102110001);教育部高等学校科技创新工程重大项目培育资金项目(707018);辽宁省教育厅项目(2006R40;2008T134)~~

摘　　要：为限制潜供电流和恢复电压值从而使特高压输电线路发生瞬时性故障后单相自动重合闸能可靠重合,利用电磁暂态仿真程序ATP/EMTP,计算了在加装快速接地开关(high speed grounding switch,HSGS)和中性点小电抗2种方式下浙北—上海特高压交流同塔双回输电线路产生的潜供电流和恢复电压,并对计算结果进行了分析。结果表明这2种方法都能有效抑制潜供电流和恢复电压,但加装快速接地开关(HSGS)多用于输电线路不完全换位且短输电线路;中性点小电抗适用于全线均匀换位运行方式的输电线路;中性点小电抗的最佳取值为500mH。In order to ensure the successful reclosure of single-phase automatic reclosure on ultra-high voltage transmission lines,the value of the secondary arc current and the recovery voltage must be limited.We analyzed and described two popular secondary extinction methods,namely,one by using high speed grounding switch（HSGS） and another by using the neutral reactor compensation.Taking Zhebei-Shanghai UHVAC double circuit transmission lines on the same tower as an example,we presented the computation of secondary arc current and recovery voltage by ATP/EMTP,and compared the results.The results show that both methods can restrain the value of secondary arc current and recovery voltage.The high speed grounding switch can only be applied to imcomplete transposition and the short transmission lines.The neutral reactor compensation can only be applied to the whole transmission lines.The optimal size of the neutral reactors of shunt reactor is 500 mH.

关 键 词：特高压交流(UHVAC) 快速接地开关(HSGS) 中性点小电抗 潜供电流 恢复电压 单相重合闸 

分 类 号：TM721.2[电气工程—电力系统及自动化]