中压变电站现场电弧故障检测

Dominik Czeschka, K. Friedl, A. Abart
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引用次数: 0

摘要

本文研究了配电网中常见的变电站(配电变电所)中压开关柜电弧故障的影响。这些变电站广泛用于将中压降压到低压,为终端用户供电。重点考虑的是对配电变电站建筑物内部造成的压力负荷。对于既有砌体建筑,考虑压力荷载动态影响的文献很少。然而,静压载荷的可用限值可能会超过。由于结构工程师缺乏准确的电弧压力载荷评估方法,因此必须采用保守的方法。代价高昂的后果是,要么必须付出巨大的努力来限制压力,要么必须重建配电变电站。因此,通过对某砌体变电站进行现场试验,对电弧事件对砌体压力承载能力的影响有了新的认识。结果表明,砌体的承载能力高于预期。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
In-situ arc fault testing on MV substation
This paper deals with the effects of an arc fault in the medium-voltage switchgear of a transformer substation (distribution substation), a common part of an electrical distribution grid. These transformer substations are widely used to step down medium voltage to low voltage and supply end-customers.The focus of the considerations is the pressure load caused on the inside of the electrical distribution substation building. For existing buildings made of masonry, hardly any literature is available taking the dynamic of the pressure load into account. However, available limit values for static pressure load might be exceeded. Due to the lack of accurate assessment methods for arc pressure loading by structural engineers, conservative approaches must be used. The costly consequence is that either great efforts must be made to limit the pressure or the distribution substation hast to be rebuilt. Therefore, an in-situ test was performed on a masonry transformer station to gain new insight into the pressure load capacity of masonry due to arcing events. The results show a higher load capacity of masonry than assumed.
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