电子式电压互感器的温度影响因素分析

摘要

电子式互感器应用逐渐扩大,准确度越来越受到关注.在电子式互感器性能检测试验和变电站现场,其准确度极易受到温度变化的影响.针对SF6气体绝缘的电容分压式电子式电压互感器,描述了系统结构及工作原理.从一次传感部分到二次信号采集部分,分析了每个环节的温度特性,梳理了受温度影响的主要因素,并提出适当措施,确保电子式电压互感器整体温度稳定性.%With the application of electronic transformer gradually expanded, the accuracy gets more and more attention. In the electronic transformer performance test and the transformer substation, its accuracy is easily influenced by temperature variation. This paper describes the system structure and working principle of the electronic voltage transformers which use capacitor voltage divider and is insulated by SF6 gas. From the high voltage sensor to the secondary signal sampling section, it analyzes the temperature characteristic of each link, combing the main factors that affected by temperature, and puts forward appropriate measures to ensure the temperature stability of electronic voltage transformers.