330 kV输电线路绝缘架空地线专用接地装置的设计与实现

Design and implementation of grounding device used to the insulated overhead ground wire of 330 kV transmission line

针对330 kV超高压输电线路绝缘架空地线无专用接地线,设计一种串接电阻的新型接地装置,以避免当绝缘架空地线存在过大感应电压时因瞬间直接接地产生的电弧伤害。通过对某330 kV同塔双回输电线路不同情况下绝缘架空地线上产生的感应电压进行仿真分析,为新型接地装置的电气参数选取提供依据,同时详细设计了其机械结构。对新型接地装置进行了现场应用,验证了其相较于传统接地线具有的便携性及安全性优势。

Aiming at the problem that there was no specialized grounding line for the insulated overhead ground wire of 330kV UHV transmission line,a new kind of grounding device with series resistance was designed to avoid the arc damage caused by instantaneous direct grounding when the insulated overhead ground wire existed induction voltage.By means of the simulation analysis of the induced voltage generated on a 330kV double transmission lines with the same tower under different working conditions,provided a basis for the selection of electrical parameters of the new grounding device,and designed its mechanical structure in detail.The application of the new grounding device designed above-mentioned has verified its portability and safety advantages over the traditional grounding line.