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Analytical study on lightning surge propagation along rail and lightning overvoltages on railway signalling equipment

机译：雷电浪涌沿铁路传播及铁路信号设备雷电过电压的分析研究

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摘要

The development of the effective and economical protection measures is very important for the railway signalling systems because the lightning damages cause the disruption of the railway transportation systems. In general, the railway signalling systems are set up at a wayside and directly connected to the rails through cables. The lightning surges can invade the railway signalling systems via the cables and cause damages to the systems. Accordingly, clarifying the propagation characteristics of lightning surges along the rails is essential to develop the lightning protection measures for the railway signalling systems. We have carried out the field tests to examine both surge impedance and surge propagation velocity of the rails. This paper proposes a calculation model of the surge propagation characteristics along the rails. The results of surge impedance and surge propagation velocity calculated by the proposed model almost agree with the experimental results. Moreover, this paper proposes a calculation model of the lightning overvoltages on the railway signalling equipment. The calculation model consists of the rail model and the equivalent circuit model of signalling equipment. We indicated the validity of the calculation model of the railway signalling equipment by comparing with the results of the field test. This model is applicable to the development of lightning protection measures for the railway signalling systems.
机译：有效的和经济的保护措施的开发对于铁路信号系统非常重要，因为雷电损坏会破坏铁路运输系统。通常，铁路信号系统设置在路边，并通过电缆直接连接到轨道。雷电浪涌可能通过电缆侵入铁路信号系统，并导致系统损坏。因此，弄清雷电沿铁轨的传播特性对于制定铁路信号系统的防雷措施至关重要。我们已经进行了现场测试，以检查导轨的浪涌阻抗和浪涌传播速度。本文提出了沿钢轨浪涌传播特性的计算模型。该模型计算得到的电涌阻抗和电涌传播速度的结果与实验结果基本吻合。此外，本文提出了铁路信号设备雷电过电压的计算模型。计算模型包括铁路模型和信号设备的等效电路模型。通过与现场测试结果的比较，我们表明了铁路信号设备计算模型的有效性。该模型适用于铁路信号系统的防雷措施的开发。

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