电压互感器的绝缘结构和老化因素及应对措施  

Insulating Structure and Aging Factors of Voltage Transformer and Corresponding Measures

作　　者：吉涛 

机构地区：[1]吴忠供电局变电检修工区

出　　处：《上海电器技术》2010年第4期21-25,共5页Shanghai Electric Appliance Technology

摘　　要：介绍了按绝缘介质分类的干式、浇注式、油浸式和气体式4类电压互感器的结构及按电压等级、使用环境的不同所采取的不同方式的电压互感器的绝缘结构。由于电气设备的绝缘在长期运行过程中会发生一系列如固体介质软化或溶解等形态变化、低分子化合物和增塑剂的挥发等的物理变化，以及如氧化、电解、电离、生成新物质等的化学变化，即绝缘的老化，最终导致绝缘失效，电力设备不能继续运行，阐述了未来电压互感器的绝缘设计寿命将按用户预期使用的寿命来设计，通过在绝缘可靠性设计中引入应力一强度干涉理论，对电压互感器的绝缘寿命薄弱环节进行优化设计。According to its insulating medium, the structure of the voltage transformer consists of four parts of the dry type, the castresin type, the oilimmersed type and the gas type ,which insulating structure of the voltage transformer were employed different methods due to the different voltage classes and environment of its application. During the long - term operation of the insulation of the electrical equipment, a series of physical changes were taken such as the softening or the fusion of the solid medium and the volatilization of the low molecular compound and the plasticizer, and some chemical changes such as the oxidation, the electrolysis, the ionization, the generation of new substance, etc. All these phenomena were regarded as the aging of the insulation, which consequently causes the invalidation or failure of the insulation, electri- cal equipment can not continue to run, explained the future design life of the insulation voltage transformer to use the life of the user to design were expected, the design through the insulating reliability of the stress - strength interference theory, voltage transformer insulating life to optimize the design of the weak links were introduced.

关 键 词：电压互感器 绝缘结构 老化因素 应对措施 

分 类 号：TM451[电气工程—电器]