提高V型串外侧肢可靠性的措施研究
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摘要
对于单联V串,当内侧肢发生断串时,外侧肢变为悬垂I串,可继续承受导线荷载而不致立即放电,给了巡检人员发现和解决故障的时间;而外侧肢断串时,导线将立即靠近塔身而放电。因此,设计时应考虑提高外侧肢的可靠性。此文分析了绝缘子掉串和金具失效两类掉串情况,提出外侧肢采用双联串、外侧肢挂点采用双联金具、加强外侧肢单联部分金具强度3种技术方案,结合V型串在工程中的应用情况开展了技术经济性分析,提出了对提高V串外侧肢的可靠性的解决措施。
For a single-linkage V type string,when the internal lateral limb is broken,and the external lateral limb becomes a dangling I type string,it can continue to bear the load of wire without immediate discharge,which gives inspector the time to find and solve the fault;while the external lateral limb is broken,the wire will immediately approach the tower and discharge.Therefore,the reliability of external lateral limb should be improved.In this article,two kinds of string broken situations including insulator string broken and armour clamp failure are analyzed.Three technical plans are proposed,including external lateral limb adopts double string,external lateral limb hanging point adopts double armour clamp,and improve the strengh of armour clamp of single-linkage parts.Combining application of V type string in engineering,the technical economy analysis is carried out,and the measures to improve the reliability of V type string external lateral limb are put forward.
For a single-linkage V type string,when the internal lateral limb is broken,and the external lateral limb becomes a dangling I type string,it can continue to bear the load of wire without immediate discharge,which gives inspector the time to find and solve the fault;while the external lateral limb is broken,the wire will immediately approach the tower and discharge.Therefore,the reliability of external lateral limb should be improved.In this article,two kinds of string broken situations including insulator string broken and armour clamp failure are analyzed.Three technical plans are proposed,including external lateral limb adopts double string,external lateral limb hanging point adopts double armour clamp,and improve the strengh of armour clamp of single-linkage parts.Combining application of V type string in engineering,the technical economy analysis is carried out,and the measures to improve the reliability of V type string external lateral limb are put forward.
引文
[1]中国电力企业联合会.±800 k V直流架空输电线路设计规范:GB 50790-2013[S].北京:中国计划出版社,2013:14-15.
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[3]中国电力企业联合会.电力金具标称破坏荷载系列及连接型式尺寸:GB/T 2315-2008[S].北京:中国标准出版社,2009.
[4]张殿生.电力工程高压送电线路设计手册[M].北京:中国电力出版社,2003.
[5]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2003.
[6]程应镗.送电线路金具的设计、安装、试验和应用[M].北京:水利电力出版社,1988.
[7]董吉谔.电力金具手册[M].北京:中国电力出版社,2001.
[2]中国电力企业联合会.电力金具通用技术条件:GB/T 2314-2008[S].北京:中国标准出版社,2009.
[3]中国电力企业联合会.电力金具标称破坏荷载系列及连接型式尺寸:GB/T 2315-2008[S].北京:中国标准出版社,2009.
[4]张殿生.电力工程高压送电线路设计手册[M].北京:中国电力出版社,2003.
[5]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2003.
[6]程应镗.送电线路金具的设计、安装、试验和应用[M].北京:水利电力出版社,1988.
[7]董吉谔.电力金具手册[M].北京:中国电力出版社,2001.