高海拔地区特高压杆塔的合成电场和电位转移电流实测研究

针对2000 m高海拔地区±800 kV特高压直流带电作业过程中,作业人员将承受特高压杆塔产生的合成电场和电位转移电流的问题,开展了特高压杆塔的合成电场和电位转移脉冲电流的实测研究。首先,从理论上分析了考虑离子流条件下特高压杆塔的合成电场计算方法和电位转移电流特性。然后,建立特高压杆塔带电作业和电位转移有限元仿真模型,并进行了仿真计算分析。最后,在高海拔特高压试验基地搭建了试验平台和测试系统,开展了特高压杆塔的合成电场和电位转移脉冲电流的现场实际测量工作,试验结果可以为高海拔地区特高压杆塔带电作业的安全防护标准提供制定依据。

Study on synthetic electric field and potential transfer current of UHV tower in high attitude area

In view of the problem that the workers will bear the synthetic electric field and potential transfer current produced by UHV(Ultra-High Voltage) tower in the process of ±800 kV UHV DC live working in high altitude area(2000 meters),the actual measurement and research on the synthetic electric field and potential transfer pulse current of UHV tower are carried out. Firstly, the calculation method of the synthetic electric field and the characteristics of the potential transfer current of UHV tower considering the ion current are analyzed theoretically. Then, the finite element simulation model of UHV tower live working and potential transfer is established, and the simulation analysis is carried out. Finally, the test platform and test system are built in the high altitude UHV test base to carry out the field measurement of the synthetic electric field and potential transfer pulse current of UHV tower. The testing results can provide a basis for the safety protection standard of UHV tower live working in high altitude area.