交流特高压复合横担对带电作业安全影响

交流特高压复合横担结构与常规塔型存在较大差异，对带电作业安全距离、作业人员进出等电位方式以及电场防护要求造成较大影响，通过试验和仿真计算分析了交流特高压复合横担对带电作业安全的影响。研究结果表明：交流特高压复合横担线路带电作业最小安全距离、最小组合间隙距离分别为6.3 m、6.5 m，比常规塔型要求分别高0.3 m、0.4 m；交流特高压复合横担线路可采用沿复合横担进入等电位的方式；沿交流特高压复合横担进出等电位时，作业人员体表电场强度最大值出现在头部、肩膀区域，且比常规塔型线路情况高，带电作业过程中应对该区域加强防护。其研究成果可为交流特高压复合横担线路带电作业安全工作的开展提供技术支撑。

Study on the Impact of UHV AC Composite Cross-arms on Live Working Safety

The UHV AC composite cross-arm structure, quite different from the conventional towers, has a significant impact on the safety distance of live working, the mode of entering or exiting equipotential, and the electric field protection requirements of workers. This paper analyzes the influence of UHV AC composite cross-arm on the safety of live working through experiments and simulation calculations. As the simulation results show, the minimum approach distance and the minimum combined gap distance of live working on the UHV composite cross-arm line are 5.6 m and 6.0 m respectively, which are 0.3 m and 0.4 m higher than the conventional tower requirements. For the power line on the UHV AC composite cross-arm, we can enter the equipotential along the composite cross-arm. When entering or exiting equipotential along the UHV AC composite cross-arm, the workers have the maximum electric field strength on their heads and shoulders, with a magnitude being higher than that of the conventional tower. This areas are therefore should be protected specially during live working. The results of this paper can provide a technical support for the safety of live working on UHV AC composite cross-arm lines.