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Transient Voltage Stress Of 400 Kv Urban System Evaluated By Numerical Calculations

机译：数值计算评估400 Kv城市系统的暂态电压应力

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摘要

Overhead lines, high voltage cable systems and substations are important elements of the high voltage network. More and more close combinations of these elements are used in urban networks. This leads to new transient situations and a more complex transient behaviour in case of lightning or switching events. Additionally the requirements of a constant power supply ask for new efforts to predict impacts caused by interruptions. Based on this fact this paper deals with investigations to evaluate the transient behaviour of a close combined 400 kV urban system. Numerical tools are basically a modern method to estimate transient stresses, help to optimize the insulation coordination and can simulate various circuit states. Thus, temporary faults can be reduced or avoided at all. One of the major aspect of this work is the close connection of an overhead line, a cable section and a substation related to the 400kV system. Additionally attention was paid to the transformers and the secondary side of the system, a 110-kV urban distribution network. A number of calculations were carried out to get an overview of the transient stress caused by lightning or switching in numerous network nodes of the substation. Of additional interest have been different circuit states at the 400 kV gas insulated substations (GIS) and the transient behaviour at the arrestors. Amplitudes and the energy consumption at the arrestors were taken into account. These actual investigations were carried out to get useful information's about the transient stress in this important Viennese 400 kV substation, which was officially put into operation in May 2006. As an output of these investigations the results influence the strategy in running the network.
机译：架空线，高压电缆系统和变电站是高压网络的重要组成部分。这些元素越来越紧密地结合在城市网络中。在雷电或开关事件的情况下，这会导致新的瞬态情况和更复杂的瞬态行为。另外，对恒定电源的要求要求做出新的努力以预测由中断引起的影响。基于这一事实，本文进行了研究，以评估一个封闭的组合400 kV城市系统的暂态行为。数值工具基本上是估算瞬态应力，帮助优化绝缘配合并可以模拟各种电路状态的现代方法。因此，完全可以减少或避免临时故障。这项工作的主要方面之一是与400kV系统相关的架空线，电缆段和变电站的紧密连接。此外，还特别关注了变压器和系统的二次侧，即110 kV的城市配电网络。进行了许多计算，以了解由变电站的众多网络节点中的雷电或开关引起的瞬态应力。另外引起关注的是400 kV气体绝缘变电站（GIS）的不同电路状态和避雷器的瞬态行为。考虑了避雷器的振幅和能量消耗。进行了这些实际调查，以获取有关此重要的维也纳400 kV变电站的暂态应力的有用信息，该变电站于2006年5月正式投入运行。作为这些调查结果的结果，这些结果会影响网络运营的策略。

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