Analysis of Lighting Overvoltage and Induced Voltage of Neutral Line on the 22.9kV Combined Distribution Line

22.9kV 혼합배전선로의 뇌과전압 해석 및 중성선 유기 전압 해석

This paper describes the voltage induced at neutral line and the proper location of lightning arrester in combined 22.9 kV class distribution line jointed overhead line and cable each other Modeling is established in ATP Draw to perform simulation. Simulated distribution line at this paper consists of distribution line 4.2km and underground distribution line 2km. Overvoltage and induced voltage are analyzed at several point of combined line. Analysis results was compared to select the best point to install arrester. Such analysis technology will be applied to obtaining capacity and location of arrester in the similar combined distribution line.