Resonance Phenomena and DC Fault Handling During Intersystem Faults in Hybrid AC/DC Transmission Systems with Partial DC Cabling
Resonance Phenomena and DC Fault Handling During Intersystem Faults in Hybrid AC/DC Transmission Systems with Partial DC Cabling
复制标题
部分直流布线的交直流混合输电系统系统间故障期间的谐振现象和直流故障处理
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
A. Arnold
中科院分区：
文献类型：
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作者：
P. Ruffing;C. Petino;S. Rüberg;J. C. Campos Garcia;S. Beckler;A. Arnold
在不久的将来，在某些应用中，HVAC和HVDC系统可能在同一塔上布线。这些所谓的混合输电系统提出了一些新的挑战，如AC/DC系统间故障。以往的研究主要集中在纯架空线路高压直流输电系统中的故障分析。然而，新的高压直流输电走廊可能会建成部分电缆系统，以提高公众的接受程度。系统间故障与混合直流架空和电缆传输系统的组合是一个新的挑战，交流和直流保护系统，并在本文中进行了分析。结果表明，即使在直流故障电流中断的HVDC系统是暴露于显着的交流过电压和故障电流，这是由系统的谐振行为。标准直流保护系统无法清除这些干扰。为了保护直流系统免受系统间故障的影响，提出了快速接地的概念。
In the near future, HVAC and HVDC systems may be routed on the same towers in some applications. These so-called hybrid transmission systems raise several novel challenges, such as AC/DC intersystem faults. Previous investigations focus on the analysis of these faults in purely overhead line based HVDC systems. However, new HVDC corridors might be built as partially cabled systems to increase public acceptance. Intersystem faults in combination with mixed DC overhead and cable transmission systems are a novel challenge for both AC and DC protection systems and are analyzed within this paper. It is shown that even after DC fault current interruption the HVDC system is exposed to significant AC overvoltages and fault currents, which are caused by a resonant behavior of the system. These cannot be cleared by standard DC protection systems. To protect the DC system against intersystem faults the use of a fast earthing concept is proposed.