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Thirty-Six Years of Service Experience with a National Population of Gas-Insulated Substations

机译：在全国范围内的气体绝缘变电站工作36年

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摘要

This paper shows the result of a failure survey including the entire population of gas-insulated substations in the Norwegian power transmission system. The survey comprises the complete service experience up to now—nearly 12$thinspace$000 circuit-breaker years. Information about 180 failures has been recorded during 36 years: 77 internal flashovers/arcing faults have occurred, four of which burned through the encapsulation and another six caused the pressure-relief devices to operate. No severe injuries have been recorded. The overall failure rates and their causes are comparable to the findings of other reliability surveys, although the occurrence of severe arcing faults appears to be clearly higher than noticed elsewhere. The 300-kV and 420-kV gas-insulated substations put into service around 1980 have a significant and negative influence on the overall failure rate, whereas a large number of 145-kV substations installed since the early 1990s have proven very reliable. Even though a large portion of the population is above or approaching the designed service life of 30 years, no significant aging problems could be revealed with a basis in the failure statistics.
机译：本文显示了故障调查的结果，其中包括挪威电力传输系统中所有气体绝缘变电站的数量。该调查包括到目前为止的完整服务经验-接近12 $ thinspace $ 000的断路器年。在过去的36年中，已记录了有关180次故障的信息：发生了77次内部闪络/电弧故障，其中4次通过封装燃烧，另外6次导致泄压装置运行。没有严重受伤的记录。总体故障率及其原因与其他可靠性调查的结果相当，尽管严重的电弧故障的发生率明显高于其他地方。 1980年前后投入服务的300 kV和420 kV气体绝缘变电站对整体故障率有重大负面影响，而自1990年代初以来已安装的大量145 kV变电站被证明是非常可靠的。即使有很大一部分人口超过或接近30年的设计使用寿命，使用故障统计数据也无法发现明显的老化问题。

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