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Soil electrical resistivity is an important parameter in grounding system design. In this paper, laboratory measurements of soil electrical resistivity are carried out using a soil box. Two measurement methods are used and compared, namely, a two-electrode method and a four-electrode method. The measurements indicate that the results reported by the two-electrode method are affected by the contact...
Lightning transient characteristics of the grounding grid is the fundamental performance for lightning protection of the substation. The stability and safety of the 500-kV substation is of great importance to the safe operation of the power system. The characteristic of grounding grid is quite different from that at the power-frequency condition when subject to lightning impulse current. Using CDEGS...
The Yangtze River Bridge studied in this paper is a three-tower steel concrete structure cable stayed bridge with two sides steel cable, composite girder cable stayed bridge and the largest span between towers in the world. The lightning density at the bridge site is much higher than the average value of Wuhan city, so it is important to access the lightning safety. This paper analyzes the lightning...
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