1000 kV输电线路不同检修项目带电作业防护研究

Research on the Protection of Live Working in Different Maintenance Items of 1000 kV Transmission Line

检修人员进入带电运行的输电线路进行带电作业时,可能会引起人体表面感应出的电场强度超过标准控制值,从而对人体健康产生影响。文中利用ANSYS有限元软件建立榆横—潍坊1 000 kV特高压交流输电线路及杆塔的模型,计算了检修人员不同部位及姿势下的电场强度,分析了检修人员在杆塔和横担类、绝缘子和金具类、导线以及接地装置类带电作业检修项目时人体电场强度,据此选择了不同检修作业时的屏蔽服,最后通过现场实验验证计算结果的有效性。总结了对特高压同塔双回输电线路各类检修项目的防护电场措施,充分保障了工作人员的人身安全。

When the maintenance personnel enter the live working transmission line for live working,the electric field intensity induced by the human body surface may exceed the standard control value,which has an impact on human health.This article uses ANSYS finite element software to establish an accurate model of the Yuheng-Weifang 1000 kV UHV AC transmission line and towers.According to the electric field strength of the human body during the live work maintenance items of fittings,wires and grounding devices,the shielding clothing for different maintenance operations is selected based on this,and the validity of the calculation results is verified through field experiments.The electric field protection measures for all kinds of maintenance items of UHV double circuit transmission lines on the same tower are summarized to fully guarantee the personal safety of workers.