Lightning Faults Analysis and Protection Measures for UHV DC Transmission Line

In recent years China is rapidly developing the UHV DC transmission project, and however the lightning has become the biggest threaten to the safe and stable operation of UHV DC transmission lines. In order to master the fault reasons and characteristics, and thus to find the solutions, this paper conducted the detailed statistical and correlation analysis on the actually happening 19 lightning faults of the three major ±800 kV UHV DC transmission lines. With the analysis results of the lightning faults, this paper had a detailed discussion on the technical parameters of ±800 kV UHV DC line arrester, and gave an introduction of the designed and developed arrester equipment.