Considering the power plant condition and vibration frequency, hierarchical diagnostic strategy is put forward. The accuracy of fault diagnosis is improved.

根据机组的状态和振动频率，提出了分阶段、分层次的诊断策略，提高了故障诊断的准确率。

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The research projects, breaking the traditional testing and diagnostic methods, provides a new way for condition monitoring and fault diagnosis of equipment on multi-operating conditions.

本课题的研究，突破了传统的测试与诊断方法，为在多工况下对设备状态监测和故障诊断提供了一条新途径。

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Because of the important state of the equipment of substation in power system, it is very necessary to process condition monitoring and fault diagnostic to gain high operating reliability.

由于变电站设备在电力系统中的重要地位，因此对其进行故障诊断，提高其运行的可靠性，是十分必要的。

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