特高压(ultra high voltage, UHV)交流与直流线路同廊道运行时带电作业区域电压高、场强大，交直流混合电场比单一电场更为复杂。为确保作业人员安全，结合实际±1100kV直流和1000kV交流线路，建立了包含输电导线、杆塔及带电作业人员的三维计算模型，通过分析开展带电作业时人员的体表混合场强、电位转移电流及暂态能量，对作业人员安全防护进行研究。结果表明：随着作业人员不断接近直流线路，体表场强受交流线路影响越明显，最高可使作业人员体表场强增大约9%，达到1920kV/m；交流线路的存在将导致电位转移电流增长约7%，但对暂态能量影响较小。通过对特高压线路不停电检修所减少的碳排放量进行进一步计算，验证了特高压带电作业对减少碳排放具有促进作用。
英文摘要:
When UHV AC and DC lines run in the same corridor, the voltage in the live working area is high and the field is strong. The AC/DC mixed electric field is more complex than a single electric field. In order to ensure the safety of workers, combined with the actual ±1 100kV DC and 1000kV AC lines, a three-dimensional calculation model including transmission lines, towers and live working personnel is established in this paper. Through the analysis of the mixed field strength, potential transfer current and transient energy on the body surface of workers during live working, the safety protection of workers is studied. The results show that as the operators approach the DC line, the field strength on the body surface is more obviously affected by the AC line, which can increase the field strength on the body surface of the operators by about 9% to 1920kV/m at most. The existence of AC line will increase the potential transfer current by about 7%, but has little effect on transient energy. Through the further calculation of carbon emissions reduced by non-power outage maintenance of UHV lines, it is verified that UHV live working has a promoting effect on reducing carbon emissions.