This paper introduces the principle, scheme of signal extraction, design of the software and hardware about the on-line monitoring device of the leakage current.

介绍了泄漏电流在线监测装置的原理、信号抽取方案和软硬件设计。

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The water-cooling system is very important for the safe operation of generator. The water leakage detection of the system is typically a problem of weak signal extraction under strong disturbances.

发电机内冷水系统是发电机组安全运行的一个重要组成部分，其渗漏监测是在强干扰下弱信号的识别问题。

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Thus the optimization plan is made by diverting primary leakage to steam extraction of the fourth section instead of the fifth section.

经分析，选择了将轴封一次漏汽导入五段抽汽改为导入四段抽汽的优化方案，并利用大修进行了实施。

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