Surface Discharge Behaviour of Coated Electrodes in Gas-Insulated Systems Under DC Voltage Stress
Surface Discharge Behaviour of Coated Electrodes in Gas-Insulated Systems Under DC Voltage Stress
复制标题
直流电压应力下气体绝缘系统中涂层电极的表面放电行为
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
U. Riechert
中科院分区：
文献类型：
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作者：
T. Götz;D. E. Moghadam;J. Speck;K. Backhaus;T. Gabler;S. Grossmann;P. Simka;U. Riechert
由于可再生能源的使用越来越多，需要长距离传输电能。除了传统的交流互联，高压直流（HVDC）链路提供了一个经济的选择，以运输大量的能源。特别是在海上平台上，由于盐水气氛和有限的可用空间，使用气体绝缘变电站（GIS）是有益的。考虑到技术和经济方面，在这些平台上使用DC-GIS是有利的。直流GIS中的恒定电场会导致气固界面上的电荷积累。G.在低导电电极涂层和SF6之间的界面上，先前的研究表明，这种电荷载流子积累可以导致涂层电极上的表面放电，这可能降低整个绝缘系统的介电强度。为了理解这些现象，进行了具有低导电性和高导电性电极涂层的对比实验。
Due to the increasing usage of renewable energy sources, it is necessary to transmit electrical energy over long distances. Apart from traditional AC interconnection, High-Voltage direct current (HVDC) links provide an economic option to transport bulk energy. Especially on offshore platforms it is beneficial to use gas-insulated substations (GIS) due to the saline atmosphere and the limited space available. Considering technical and economic aspects, it is advantageous to use DC-GIS on those platforms. The constant electrical field in DC-GIS may lead to charge accumulation on gas-solid interfaces - e. g. on the interface between the low-conductive electrode coatings and SF6• Previous investigations revealed that this charge carrier accumulation can lead to surface discharges on coated electrodes which may reduce the dielectric strength of the whole insulation system. In order to understand these phenomena comparative experiments with low and high conductive electrode coatings were performed.