Page 85 - 增刊2023年质量管理交流研讨会论文集(1)(1)

2023 年质量管理经验交流论文汇编

某 QC 小组活动在耐张塔硬跳线弧垂控制中的应用研究

刘宇男，张广玉，郑旻文，李蕴轩，谢静维
中国电力工程顾问集团东北电力设计院有限公司，吉林长春，130012

摘要：本文基于新疆某750kV交流输电线路工程中硬跳线设计开展QC小组活动，750kV架空输
电线路的耐张绝缘子串较长,跳线亦随之增长,但刚性跳线硬度较强，设计按照悬列线方程计
算给出的跳线线长和弧垂的参考值往往与现场施工的实际情况不一致，施工安装误差较大，
运行后易造成闪络事故的发生。750kV输电线路输送的容量非常大，一旦发生跳闸，不仅会
造成大面积停电和经济损失，还会对电网的安全运行造成巨大的冲击，有可能造成系统解列
的严重后果。根据对杆塔空间模型的计算和施工现场的数据比对，小组成员对跳线线长的计
算公式进行了完善，增加了优化系数，缩小了与现场施工的差值，并对计算成果进行了检查
和校核，根据计算结果，误差均不超过2%。为750kV交流输电线路工程刚性跳线的施工提供
更加准确可靠的参考依据。
关键词：750kV 交流输电线路；刚性硬跳线；闪络事故；QC 小组

Application of QC Group Activity in Sag Control of Rigid
Jumper of Tension Tower

LIU Yunan,ZHANG Guangyu ,ZHENG Minwen ,LI Yunxuan ,XIE Jingwei
Northeast Electric Power Design Institute Co. Ltd., China Energy Engineering Group, Changchun
130021, China

Abstract: Based on the design of rigid jumper in a 750kV AC transmission line project in Xinjiang,
this paper carried out QC group activities. The tension insulator string of 750kV overhead
transmission line is longer, and the jumper is also increased. However, the rigidity of rigid jumper
is strong. The reference value of jumper length and sag calculated according to the suspension line
equation in the design is often inconsistent with the actual situation of the site construction. The
construction and installation error is large, and it is easy to cause flashover accidents after
operation. The transmission capacity of 750 kV transmission line is very large. Once a trip occurs,
it will not only cause large-scale power failure and economic losses, but also cause huge impact
on the safe operation of the power grid, which may cause serious consequences of system
disconnection. According to the calculation of the tower space model and the data comparison of
the construction site, the team members improved the calculation formula of the jumper wire
length, increased the optimization coefficient, reduced the difference with the site construction,
and checked and checked the calculation results. According to the calculation results, the error was
not more than 2%. Provide more accurate and reliable reference basis for the construction of rigid
jumper of 750 kV AC transmission line project.
Key words: 750kV AC transmission line; Rigid jumper; Flashover accident; QC team

1 工程背景
750kV 输电线路输送的容量非常大，一旦发生跳闸，不仅会造成大面积停电和经济损失，
还会对电网的安全运行造成巨大的冲击，有可能造成系统解列的严重后果。
质量控制小组由设计单位技术骨干员工和专家加入，运用质量管理的理论和方法 [1-4] ，
展开小组活动，基于客观事实，解决问题。
2 课题选择
750kV 架空输电线路的耐张绝缘子串较长,跳线亦随之增长,但刚性跳线硬度较强，设计
按照悬列线方程计算给出的跳线线长和弧垂的参考值往往与现场施工的实际情况不一致，施
工安装误差较大，运行后易造成闪络事故的发生。
QC 小组根据现场实际情况，小组会议讨论论证后，决定选择“耐张塔硬跳线弧垂控制”
为课题。该 QC 小组在 2022 年 3 月 1 日至 8 月 30 日，围绕该课题展开活动共计 22 次。
3 目标设定及可行性分析

80