变压器绕组变形测试仪选频滤波特性校验技术研究  

Research on calibration technology of selective filtering characteristics for transformer winding deformation tester

作　　者：刘勇 彭倩 王剑 王鹏[2] LIU Yong;PENG Qian;WANG Jian;WANG Peng(State Grid Sichuan Provinvce Electric Power Research Institute,Chengdu 610039,China;College of Electrical Engineering and Information Technology,Sichuan University,Chengdu 610065,China)

机构地区：[1]国网四川省电力公司电力科学研究院,四川成都610039 [2]四川大学电气信息学院,四川成都610065

出　　处：《中国测试》2018年第6期6-10,共5页China Measurement & Test

基　　金：四川省电力公司科技项目(52199713506F)

摘　　要：为开展针对变压器绕组变形测试仪选频滤波特性的校准工作,提出一种基于增益误差值的判定方法。通过研究变压器绕组变形测试仪的选频滤波特性,理论推导其判定指标。研究发现,在干扰幅值倍数α=1且滤波器衰减倍数β≤0.5时进行选频滤波校验,测试仪最大的增益绝对误差应小于0.969 1 d B,此时选频滤波特性符合测试仪-6 d B带宽应小于扫描频率的2%的要求。提出的判定方法高效、可靠,可支撑测试仪选频滤波校准工作的开展,用于提高测试仪选频滤波性能。In order to calibrate the selective filtering characteristics of transformer winding deformation tester（TWDT）, a determination method based on gain error value is proposed. By researching the selective filtering characteristics of transformer winding deformation tester, determination indexes are deduced theoretically. The research shows that when the disturbance amplitude time α is 1 and filter attenuation time β is lower than 0.5,the maximum gain absolute error of tester is less than 0.969 1 d B, and at this time, selective filtering characteristics should meet the requirements that the-6 d B bandwidth of tester should be less than 2% of the scanning frequency. This method is efficient and reliable, and it can support the implementation of selective filtering calibration, so as to improve the selective filtering performance of tester.

关 键 词：校准 变压器 绕组变形测试仪 频率响应分析 选频滤波特性 

分 类 号：TM41[电气工程—电器]