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首页> 外文会议>IEEE electrical insulation conference >Incapability of Analog Relay Protection to Detect Generator Stator Winding Ground Failures at Neutral End
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Incapability of Analog Relay Protection to Detect Generator Stator Winding Ground Failures at Neutral End

机译：模拟继电器保护无法检测中性点发电机定子绕组接地故障

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摘要

The electromechanical ground protection relay 59GN commonly used in generator protection does not respond to grounds in the bottom ~5% of the stator winding. Recent experience with 4 such failures to large generators suggests that this lack of protection can be a disastrous deficiency. These 4 failures each caused massive damage to the generator, and collectively had a total cost, including repair and loss of generation, close to $500,000,000. This paper will describe those 4 failures, and will discuss newer ground relay systems that monitor and protect the entire stator winding for grounds. The objective of this paper is to encourage owner/operators to add one of the newer relay systems.
机译：发电机保护中常用的机电接地保护继电器59GN不能响应定子绕组底部5％左右的接地。大型发电机发生4次此类故障的最新经验表明，缺乏保护可能是灾难性的缺陷。这4次故障各自对发电机造成了巨大的损害，并且包括维修和发电损失在内的总成本接近5亿美元。本文将描述这4种故障，并讨论监视和保护整个定子绕组接地的新型接地继电器系统。本文的目的是鼓励所有者/运营商添加更新的中继系统之一。

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