高压直流换流站直击雷防护设计及应用

The Design and Application of Direct Lightning Stroke Shielding in the HVDC Converter Station

雷电对电力系统的危害很大,高压直流换流站对雷电的防护问题值得高度关注。介绍国内外高压直流换流站或变电站普遍使用的直击雷防护设计方法,如固定角度法,经验曲线法以及电气几何模型法(EGM)。结合高压直流换流站所处的区域特点和以往的工程经验,给出了各区域直击雷防护设计方法,并指出了若避雷针(线)与被保护设备配合不恰当,可能导致较高的防雷失效率。

It is worthy of great attention to solve the problem of lightening protection for HVDC converter stations in order to lower the hazards of lightening on the power system. This paper introduces the methods of lightening protection for HVDC converter stations and AC substations worlwide such as fixed angle method, empirical design method and electrogeometric model method （EGM）. In combination with the regional characteristic of the converter station and the engineering experience of the protection, the paper gives the design method for each switchgear, pointing out that a high failure rate of the protection is possible if shielding mast or shielding wire does not match with the equipments of the convener station.