This paper presents a study on the performance of a fourth rail direct current (DC) urban transit affected by an indirect lightning strike. The indirect lightning strike was replicated and represented by a lightning-induced overvoltage by means of the Rusck model, with the sum of two Heidler functions as its lightning channel base current input, on a perfect conducting ground. This study aims to determine whether an indirect lightning strike has any influence with regard to the performance of the LRT Kelana Jaya line, a fourth rail DC urban transit station arrester. The simulations were carried out using the Electromagnetic Transients Program–Restructured Version (EMTP–RV), which includes the comparison performance results between the 3EB4-010 arrester and PDTA09 arrester when induced by a 90 kA (9/200 µs). The results demonstrated that the PDTA09 arrester showed better coordination with the insulated rail bracket of the fourth rail. It allowed a lower residual voltage and a more dynamic response, eventually resulting in better voltage gradient in the pre-breakdown region and decreased residual voltage ratio in the high current region.

本文介绍了受间接雷击影响的第四条铁路直流（DC）城市交通的性能研究。复制间接雷击，并通过Rusck模型以雷电感应过电压为代表，在理想的导电地上，两个Heidler函数之和作为雷电通道的基础电流输入。这项研究的目的是确定间接雷击是否会对LRT Kelana Jaya线（第四条直流DC城市公交车站避雷器）的性能产生影响。使用电磁瞬态程序重组版本（EMTP-RV）进行了仿真，该仿真版本包括3EB4-010避雷器和PDTA09避雷器在90 kA（9/200 µs）感应时的比较性能结果。结果表明，PDTA09避雷器与第四根导轨的绝缘导轨支架之间具有更好的协调性。它允许较低的残余电压和更大的动态响应，最终导致击穿前区域中的电压梯度更好，而高电流区域中的残余电压比降低。