Abstract

In this paper, we ground a method for calculating switching overvoltages including the discharge of lightning currents into the contact network and into a high-voltage power wire (HVPW) to isolate the contact network in the power supply system with the HVPW. It was established that the protection of outdoor signaling, centralization, and blocking (SCB) devices from switching overvoltages in a power supply system with a high-voltage power wire (PSS HVPW) can be solved by connecting the reinforcement of the support foundations of the contact network to an extended artificial grounding conductor (GC) located under the ground and not connected to the rail track. The use of a GC, along with limitation of pulse overvoltages on the insulation of the contact network supports, solves the problem of ensuring reliable protection of the traction networks from short-circuit currents in the traction network. An algorithm for calculating the voltage of the zero sequence of phase voltages of overhead power lines (OPLs) with an isolated neutral relative to the ground when they are located in the zones of electromagnetic influence of the PSS with the HVPW was developed. Due to the electrical effect of the HVPW voltage, the induced voltage in an OPL is shown to reach values ​​that significantly exceed the levels allowed by regulatory documents. An analysis of the obtained results indicates the feasibility of placing OPL wires on free-standing supports outside the reserved strip. The need for such a solution is also determined by keeping the HVPW voltage from entering the OPL wires, with their possible breakage.

中文翻译：

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带有高压电源线的交流牵引电源系统对非牵引用电设备和网络的电磁影响

摘要

在本文中，我们建立了一种计算开关过电压的方法，该方法包括将雷电流放电到接触网和高压电源线（HVPW）中，以隔离具有HVPW的供电系统中的接触网。已经确定，可以通过连接加强支撑基础的加强件来解决保护室外信号，集中和阻止（SCB）设备免受高压电源线（PSS HVPW）切换电源系统中过电压的影响。接触网连接到位于地下且未连接到轨道的扩展人工接地导体（GC）。使用GC以及限制接触网络支架绝缘层上的脉冲过电压，解决了确保可靠地保护牵引网络不受牵引网络中的短路电流影响的问题。开发了一种算法，用于计算架空电力线（OPL）相对零线相对于地面的零序相电压的零序电压，当它们位于具有HVPW的PSS的电磁影响区域时。由于HVPW电压的电效应，OPL中的感应电压显示达到的值大大超过了法规文件所允许的水平。对获得的结果进行的分析表明，将OPL导线放置在预留板条外部的独立支架上的可行性。还需要通过防止HVPW电压进入OPL导线（可能会断裂）来确定是否需要这种解决方案。