特高压紧凑型线路带电作业人员体表电场仿真计算

1 000 kV特高压交流紧凑型线路三相导线布置紧凑且相间无接地构件，使得带电作业电场环境更为严峻，为确保线路建成后带电检修工作的安全开展，采用有限元法仿真计算了特高压交流紧凑型线路典型工况下不同作业位置的带电作业人员体表电场，分析了作业人员的体表场强分布特点和变化规律，提出了相应的安全防护措施。计算结果表明，在带电作业过程中作业人员头部和手尖等曲率半径较小的部位场强较大，在等电位工况下其体表场强最大，作业人员穿戴屏蔽效率为60 dB的特高压带电作业屏蔽服可满足安全要求。研究成果可为中国1 000 kV特高压交流紧凑型线路带电作业的安全开展提供技术依据。

Computation of Body Surface Electric Field during Live Working on 1 000 kV AC Compact Transmission Lines

To ensure live working safety on 1 000 kV UHV AC compact transmission lines, it is necessary to study the influence of electric field to operating personnel. By using finite element method, field strength on body surface at each typical work site during live working on the UHV AC compact transmission lines are calculated, and the distribution characteristic of field strength is analyzed. Safety precautions are proposed according to simulation results. The results show that, the electric field on parts of smaller radius of curvature including head and hands are larger than that of other parts, and electric field of body surface reaches maximum during equal-potential operation. The screen clothes with a shielding efficiency no less than 60 dB meet safety requirements. The research results can provide an effective technical support for the live working safety on 1 000 kV UHV AC compact transmission lines.