模拟滤波器对电子电流互感器输出影响分析与补偿  

Using analog filters to compensate for output errors of electronic current transformers

作　　者：王政平[1] 张廷成[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2008年第12期1373-1376,共4页Journal of Harbin Engineering University

摘　　要：温度变化会严重影响电子式电流互感器(electronic current transformers,ECT)输出信号的角差、比差精度,降低ECT的准确级.为了提高ECT的输出精度,保证其符合相关技术标准要求,提出了一种用于ECT的模拟滤波器的设计原理,分析了这种模拟滤波器对ECT角差、比差的影响,提出了利用软件技术对其进行补偿的技术方法.在国家授权检测单位对采用此技术的ECT进行的检测结果证实,采用该方法的ECT可满足相关技术标准对角差、比差测量精度的要求.Temperature variations in an electronic current transformer （ECT） influence the ratio error and phase displacement and reduce the accuracy class of the ECT. To improve the output accuracy and ensure that ECTs satisfy their corresponding technical standards, a design principle for analogue filters for ECT applications is proposed in this paper, and the effects of the filters on the ratio error and phase displacement of ECTs are analyzed, and a technical scheme using a software based digital filter to compensate for these effects is explained. The tests conducted in the national transformer quality test center verified that an ECT employing this scheme can satisfy the corresponding technical standards for ratio error and phase displacement.

关 键 词：电子式电流互感器 模拟低通滤波器 比差 角差 

分 类 号：TM452.93[电气工程—电器]