基于TA的电子式电压互感器  

Electronic Voltage Transformer Based on TA

作　　者：王海浪[1] 毛弋[1] 周有庆[1] 纪哲[1] 卢小芬[1] 刘跃群[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《仪表技术与传感器》2010年第9期7-9,共3页Instrument Technique and Sensor

基　　金：湖南省科技重大专项(2009FJ1014)

摘　　要：针对现有各类电压互感器存在的一些技术问题,提出了以电流互感器检测耦合电容器电流,再将电流信号传输至控制室转换为与一次电压成正比变化的二次电压信号的方法构成电子式电压互感器(EVT)的技术方案,详细阐述了新型EVT的传感原理及结构,在此基础上,与一般电压互感器进行了比较,并对所研制的110 kV EVT样机进行了高压试验,理论研究和试验结果表明:新型EVT具有结构简单、体小质轻、绝缘性能好、抗干扰能力强、测量准确度高等特点,具有很好的推广应用前景。As for a variety of voltage transformer technical problems emerging in recent years,a new electronic voltage transformer method was presented by detecting micro-current in coupling capacitor.The new type EVT used the current transformer to detect the coupling capacitor＇s current,and then secondary low current of the current transformer was led into processing equipment in a control room by transmission lines.The secondary voltage signal,which followed proportionally the primary high voltage,was converted from the secondary low current by the processing equipment.The new type high-voltage EVT＇s principle and structure were analyzed in detail.Based on this,general voltage transformers were compared with it.Then high voltage tests on the high-voltage EVT were conducted.Theoretical research and experiment results show that the EVT is light and small with simple structure,without oil-tank,good at electric insulation,with high measurement accuracy,stable and reliable working ability,and strong anti-electromagnetic interference ability,which has great prospects for the popularization and application.

关 键 词：电压互感器 电子式电压互感器 检测电流型电压互感器 电流互感器 耦合电容器 

分 类 号：TM451.1[电气工程—电器]