电子式互感器误差的两种校验方法对比  

Comparision of Two Electronic Transformer Error Measuring Methods

作　　者：胡浩亮[1] 李前[1,2] 卢树峰[3] 杨世海[3] 李鹤[1] 李登云[1] 

机构地区：[1]国网电力科学研究院,武汉430074 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074 [3]江苏省电力试验研究院有限公司,南京211102

出　　处：《高电压技术》2011年第12期3022-3027,共6页High Voltage Engineering

基　　金：国家电网公司科技项目(SG0880)~~

摘　　要：目前电子式互感器校验设备大部分都是基于同步脉冲方法,此种方法容易受现场实际条件限制,因而提出了一种固定延时校验方法。为了研究这两种方法的一致性,对电子式互感器进行了详细的误差分析,给出了两种方法的误差计算公式,并进行了现场试验验证。试验结果表明:两种试验方法比差测试结果非常一致(相差0.03%),但是角差测量结果相差较大(21′),其原因是电子式互感器额定延时时间容易受网络结构及通讯的影响,实现准确测量比较困难。建议在电子式互感器误差校验时尽量采用同步脉冲方法。采用固定延时校验方法时需要严格保证额定延时时间的准确性。Currently,most electronic transformer calibrators are based on the synchronous pulse method,which is limited in the actual on-site conditions,so a fixed time-delay method is presented,In order to study the consistency of the two methods,the electronic transformer error definition was analyzed,error calculation formulas of the two methods were also given,and an on-site test was verified.The test results show that the two methods are very consistent at amplitude error measurement（the difference is 0.03%）,but have a large difference（21＇） in the phase error measurements.The reason is that electronic transformer rated delay time is very difficult to accurately measure with the impact of communications and network structure.It is proposed to use synchronous pulse method in the electronic transformer on-site calibration.When the fixed time-delay method is used,the accuracy of the rated delay time must be strictly guaranteed.

关 键 词：数字化变电站 合并单元 角差 误差分析 传输延时 同步脉冲方法 

分 类 号：TM45[电气工程—电器]