变压器故障检测技术——绝缘结构及故障诊断技术讲述.doc

毕业设计（论文） 题 目 变压器故障检测技术--绝缘结构及故障诊断技术 班 级 姓 名 指导教师 摘 要 电力变压器是电力系统中最关键的设备之一，它承担着电压变换，电能分配和传输，并提供电力服务。因此，变压器的正常运行是对电力系统安全、可靠、优质、经济运行的重要保证，必须最大限度地防止和减少变压器故障和事故的发生。但由于变压器长期运行，故障和事故总不可能完全避免，且引发故障和事故又出于众多方面的原因。如外力的破坏和影响，不可抗拒的自然灾害，安装、检修、维护中存在的问题和制造过程中遗留的设备缺陷等事故隐患，特别是电力变压器长期运行后造成的绝缘老化、材质劣化及预期寿命的影响，已成为发生故障的主要因素。其中，绝缘结构及其故障严重时会造成事故和导致事故的扩大，从而危及电力系统的安全运行……. 关键词：电力变压器故障 检测 绝缘结构 绝缘故障 诊断 Abstract Power transformer is one of the key equipment in power system, it bear the voltage transform, power distribution and transmission, and provide power service. As a result, the normal operation of the transformer is the electric power system safe, reliable, high quality and the important guarantee of economic operation, must maximize prevent and reduce the number of transformer faults and accidents. But as a result of transformer running for a long time, always cant completely avoid failure and accident, and the cause of failure and accident due to many reasons. Such as the destruction of the external force and influence of irresistible natural disasters, the problems existing in the installation and maintenance, maintenance and manufacturing process of the legacy of the defective equipment such as accidents, especially in power transformer insulation aging after long-term operation, the influence of material degradation and life expectancy, has become the main factor of failure. Among them, the insulation structure and its failure will lead to accidents and serious accidents, so as to endanger the safe operation of power system... . Keywords: insulation structure of insulation fault diagnosis electric power transformer fault detection 目 录 摘 要 1 第一章 变压器运行中的异常现象与故障处理 4 1.1变压器运行中的各种异常现象及故障的形成原因? 4 1.2变压器在运行中不正常现象的处理方法?? 8 第二章 变压器故障 10 2.1绝缘结构及故障诊断 10 2.2固体纸绝缘故障 11 2.3液体油绝缘故障 13 2.4干式树脂变压器的绝缘特性 16 第三章 变压器故障检测 20 3.1 绝缘电阻的试验原理 21 3.2绝缘电阻的试验类型 22 3.3绝缘电阻的试验方法 24 3.4绝缘电阻的测试分析 25 3.5绝缘电阻