Combined with the development and application of infrared technology, this paper introduces its basic theory, expounds the application of infrared diagnosis in power system and introduces several equipment defects discovered by infrared diagnosis.%本文结合红外技术的发展和应用，介绍了其基础理论，阐述了红外诊断在电力系统的应用情况，介绍了运用红外诊断手段发现的几处设备缺陷。
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