论文标题
对影响雷电通过地下电缆和子汇编变电站过渡的因素的调查：案例研究
An Investigation of the Factors Affecting the Transition of Lightning Surges through Underground Cables and Sub-Transmission Substations: A case study
论文作者
论文摘要
闪电是世界各地发生的一种自然现象。闪电释放的大量能量极为毁灭，因此需要一些合适的保护方案才能使其最小化其破坏性效应。鉴于闪电通过传输线，闪电造成的破坏并非总是在罢工点发生。因此，失败可能在距离惊人的点远处发生。本文研究了影响雷电通过地下电缆过渡的因素。这些电缆可用于提供一个子交易变电站，其反复的电缆故障为区域发电公司施加了巨大的成本。为了获得可靠的结果，采用了高功能的EMTP软件来计算瞬态现象。此外，模拟了各种场景，以确定某些因素的影响，包括电涌驱动器的有效性，公交耦合器开关，鞘的接地电阻以及类似对所研究变电站的敏感性。基于仿真结果，电缆鞘在终止和电缆沿线的接地电阻的影响很大。
Lightning is a natural phenomenon that takes place all around the world. The enormous amount of energy released by lightning is extremely ruinous, so some suitable protection schemes are required for power systems to minimize its destructive effects. Given that the lightning surge passes through the transmission line, the destruction caused by lightning would not always happen at the strike point. Hence, the failure could take place at a point far from the striking point. This paper investigates factors affecting the transition of lightning surges through underground cables. These cables are utilized to supply a sub-transmission substation whose repeated cable failures have imposed enormous costs to regional electric distribution companies. To obtain reliable results, the highly capable software of EMTP was employed to calculate transient phenomena. In addition, various scenarios were simulated to identify the effects of some factors, including the effectiveness of surge arresters, bus-coupler switches, the grounding resistance of sheaths, and the like, on the susceptibility of the studied substation. Based on simulation results, the effects of the grounding resistance of cable sheaths at terminations and along the cable are significant.
