摘要
提高电子式电压互感器绝缘水平和精度的关键是提高电容分压器的耐电压水平和分压比精度。采用内串式金属化薄膜电容器,工作场强取(1/3-1/2)薄膜额定电压的低场强设计和小于0.003 A/m低线电流密度的设计,并采取一系列的防氧化措施,既可以有效避免电容损失和使用寿命问题,又可以保证分压器长期运行精度。内部电容器单元之间按电位差高低排序安装,可以保证电容分压器的整体绝缘性能。
The key to improve the insulation level and accuracy of electronic voltage transformer is to improve the withstand voltage level and voltage division ratio of capacitive divider. Inner string type of metallized film capacitors is adopted,the low electrical field strength design of rated voltage of the film（1/3-1/2） is taken for the operating field strength and the design of 0.003A/m low line current density is used as well as a series of anti-oxidization measures are adopted,which can not only avoid effectively capacitance loss and operation life,but also assure long term operation accuracy of the divider. The inner capacitor units are installed as per the sequence of the magnitude of electrical potential so to assure the complete insulation performance of the capacitive divider.
出处
《电力电容器与无功补偿》
北大核心
2017年第3期99-104,共6页
Power Capacitor & Reactive Power Compensation
关键词
智能变电站
电子式电压互感器
复合绝缘式电容分压器
金属化薄膜
放电吸收作用
电容温度特性
intelligent substation
electronic voltage transformer
compound insulation type capacitive voltage divider
metallic films
discharge absorption
capacitance temperature characteristics.
