高速鐵路路基段弱電設(shè)備單獨接地的可行性研究
[Abstract]:The coupling model between integrated grounding system and weak current system of high-speed railway is established by using the electromagnetic analysis software CDEGS based on the method of moments, and the shock response under the action of lightning current is simulated and calculated, and the impact response of the pillar is analyzed when the pillar is struck by lightning. Effects of different distance between weak current system and integrated grounding system, different soil resistivity and connection between weak current system and integrated grounding system on lightning strike characteristics of weak current system and through ground wire and their regularity. The results show that when the weak current system and the integrated grounding system are not connected, the voltage of the ground line is almost unchanged, and when the distance between the two systems is increased, the voltage of the weak current system decreases and the voltage of the ground line increases. The voltage amplitude of the grounding system increases with the increase of soil resistivity, and the voltage of the weak-current system is higher than that of the non-connected system when the weak-current system is connected to the integrated grounding system, and the voltage of the through-ground line is lower than that of the non-connected ground system. At the same time, the safe distance and regularity of the weak current system under different conditions are analyzed. It is concluded that the safe distance of the weak current system increases with the increase of resistivity, and the safety distance of the weak current system connected with the integrated grounding system is larger than that of the unconnected system.
【作者單位】: 西南交通大學(xué)電氣工程學(xué)院;
【基金】:鐵道部科技計劃資助項目(2011T008-D)
【分類號】:U284.93;TM862
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