Research on Safety Protection for Live Working on ±500kV DC Transmission Line with AC and DC Multi-circuit Transmission Lines

摘要

In recent years, in order to save line corridors and reduce the scope of demolition, some new transmission modes for high voltage AC and DC power transmission line are proposed. According to the characteristics of the parallel transmission line, this paper studies the distribution characteristics of the electric field intensity of multi circuit parallel transmission lines and the single circuit transmission line. Comparing and analyzing the simulation results of the electric field strength, the safety measures for live working of ±500kV DC transmission line with multi circuit parallel transmission lines is put forward. That is the electric field protective equipment and measures used in the live line work of the ±800kV HVDC single circuit line can meet the requirements of the live operation of the ±500kV HVDC multi-circuit transmission line.