一种含噪声测试的数字化电能表计量性能检测系统  

A metering performance testing system of digital watt-hour meter with noise testing function

作　　者：徐宏伟 魏伟[2] 张秋雁 陈建国 李红斌[3] 

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵阳550000 [2]国网湖北省电力公司计量中心,武汉430080 [3]华中科技大学电气学院,武汉430074

出　　处：《国外电子测量技术》2017年第5期59-65,共7页Foreign Electronic Measurement Technology

基　　金：中国南方电网公司科技项目(GZ2014-2-0059)资助

摘　　要：电子式互感器属于电子设备,在A/D采样过程中不可避免的会产生噪声,噪声叠加至采样值中,对电能计量的准确性产生明显影响,有必要对数字化电能表入网运行前展开输入噪声测试,保证数字化电能表入网运行的准确性。因此,研究了一种含噪声测试的数字化电能表计量性能检测系统,检测系统在现有数字化电能表检测项目的基础上,提出了输入噪声测试项目及测试方法,通过研究发现,数字化电能表在噪声条件下误差明显增大及不稳定,当信噪比为30dB时,数字化电能表误差出现超差现象,建议数字化电能表入网运行前增加输入噪声测试项目。As an electronic equipment, the merging unit will be produce noise in the process of A/D sampling, the noise superposition to sampling value will he obvious influence the accuracy of electric energy metering, it is necessary to do noise testing for digital watt hour meter before running, and ensure the accuracy of the digital watt-hour meter. There-fore, this paper studies a kind of metering performance testing system of digital watt-hour meter with noise testing func- tion, proposed input noise test items and test method on the basis of existing digital watt-hour meter test items, through the study found that the error of digital watt-hour meter will be increased and unstable obviously under the condition of noise, and when SNR is 30 dB, the error exceeding it＇s tolerance, suggest to increase the input noise testing before the digital watt-hour meter put into operation.

关 键 词：IEC61850 数字化电能表 计量性能 检测系统 高斯白噪声 

分 类 号：TN98[电子电信—信息与通信工程]