浪涌干扰下电子式电压互感器的测量准确度研究  

Measurement Accuracy of EVT during the Surge

作　　者：胡蓓[1] 冯翔翔[1] 唐鹏[1] 熊俊军[1] 

机构地区：[1]中国电力科学研究院,武汉430074

出　　处：《电测与仪表》2014年第23期18-23,共6页Electrical Measurement & Instrumentation

摘　　要：电子式互感器是智能电网建设的关键设备,但由于采用了大量的光电器件,并且长期运行于高压侧或一次设备的低压侧,所受电磁环境十分复杂,易受到干扰。针对电子式电压互感器在浪涌测试中出现测量准确度下降的现象,对其原因进行了分析,提出了针对电源输入和输出端的两种防护方案,进行了理论分析和试验验证,解决了电子式电压互感器在浪涌干扰下测量准确度发生变化的问题,进一步提高了电子式电压互感器在实际应用中的可靠性。Electronic transformers（ ETs）are the most important equipment of the smart grid. Due of the use of many optical and electronic devices and long-term operation under high voltage side or low voltage part of primary equip-ment,the ETs are easy interfered by the complex electromagnetic environment. To improve measurement accuracy of electronic voltage transformer（ EVT）during the surge test,the paper first analyzes the reason,and then put forward the solution to improve the reliability under electromagnetic inference. Two protection schemes for the output and input of the power are presented,and theoretical analysis and experimental verification are performed. Therefore,the meas-urement accuracy problem of EVT during the surge can be solved,and the reliability of EVT in practical applications is improved.

关 键 词：智能电网 电子式电压互感器 浪涌 可靠性 测量准确度 

分 类 号：TM933[电气工程—电力电子与电力传动]