智能变电站电能计量中非整周期采样的误差分析与补偿  

Error Analysis and Compensation for Non-Integer-Period Sampling in Energy Metering of Smart Substation

作　　者：姚力[1] 胡瑛俊[1] 吴剑芳[1] 柳圆成 

机构地区：[1]国网浙江省电力公司电力科学研究院,杭州310014

出　　处：《浙江电力》2015年第9期1-5,共5页Zhejiang Electric Power

摘　　要：随着智能变电站的发展,数字化电能表的应用越来越广泛。由于电网频率波动等原因,电压、电流信号的非整周期采样引入的频谱泄露误差较大,影响电能量的准确计量。分析了数字化电能表电能计量过程中引入的频谱泄露误差,采用过零检测计算实时频率,提出非整周期采样误差补偿方法。通过Matlab仿真验证其补偿效果,仿真数据表明该方法简单、有效,为电能量的准确计量提供了依据。With the development of smart substation, digital etectnc ct^c,~ , - - the grid frequency fluctuation and other reasons, the spectrum leakage error brought by current and voltage non-integer period sampling is much bigger, affecting the accuracy of energy metering. This paper mainly ana- lyzes the spectrum leakage error in the process of energy metering, which uses zero-crossing check to calculate the real-time frequency and proposes the method of non-integer period sampling error compensation. Then Matlab simulation is used to test the compensation effect, and the simulation data shows that the method is simple, effective and provides basis for metering accuracy of electric energy meter.

关 键 词：数字化电能表 频谱泄露 采样定理 非整周期采样 电能计量 实时频率 

分 类 号：TM76[电气工程—电力系统及自动化] TM63