长直流电缆线路雷电和开关脉冲电平的选择

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI:10.1109/CEIDP.2011.6232706

M. Marzinotto, G. Mazzanti, C. Mazzetti

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引用次数: 4

摘要

冲击测试等级对高压直流电缆的设计比对暖通电缆的设计更重要。然而，对于给定功率的直流电网，雷电和开关脉冲试验值的选择主要是基于数值模拟和过去在类似电网上的经验，而不是基于完善和标准化的实践。在本文中，对资格预审和/或型式试验中适用于短电缆长度的雷电和开关冲击电压等级的选择，针对长直流电缆线路(超过50公里)进行了讨论，同时考虑到通过增大定律对电缆长度的耐冲击性能和沿电缆行进的浪涌过电压衰减的影响。

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Lightning and switching impulse levels selection for long DC cable lines

The impulse test levels play an even more important role for the design of HVDC cables than for HVAC cables. Nevertheless, the selection of both lightning and switching impulse test values for a given power DC intertie are mostly based on numerical simulation and on past experience on similar interties rather than on well-established and standardized practices. In this paper the selection of lightning and switching impulse voltage levels to be applied on short cable lengths in the prequalification and/or type tests is addressed for long DC cable lines (longer than 50 km) taking into account the impulse withstand behaviour with cable length via the enlargement law and the effect of over-voltage attenuation for surges that travel along the cable.

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2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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