姚力,胡瑛俊,吴剑芳,柳圆成
YAO Li,HU Yingjun,WU Jianfang,LIU Yuancheng

• 1:国网浙江省电力公司电力科学研究院

摘要(Abstract)：

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 electric energy meter is widely applied. Because of 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 analyzes 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(KeyWords)： 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
digital electric energy meter;spectrum leakage;sampling theorem;non-integer-period sampling;energy metering;real-time frequency

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 姚力,胡瑛俊,吴剑芳,柳圆成
YAO Li,HU Yingjun,WU Jianfang,LIU Yuancheng

DOI: 10.19585/j.zjdl.2015.09.001

参考文献(References)：

• [1]IEC 61850-9 Communication Networks and Systems in Substations[S].FDIS,2003.
• [2]张斌,孔敏.基于窗函数下频谱泄露的研究[J].信息化纵横,2009(11):10-12.
• [3]杨福康.基于FFT的电网谐波检测方法的研究[D].西安:西安科技大学,2009.
• [4]吴静,赵伟.非整周期采样下电功率测量的误差分析[J].清华大学学报(自然科学版),2006,46(7):1197-1204.
• [5]解德英,谢品芳,付志红,等.电网工频信号非整周期采样误差分析[J].电子测量与仪器学报,2010,24(2):113-118.
• [6]俞集辉,刘金强,郑可,等.非整周期采样谐波有功功率计量的时频域分析[J].计算机仿真,2011,28(1):307-339.
• [7]BARROSE R T,VASCONCELLOS M L R.Compos.sampling error analysis applied to high-accuracy measurement[J].IEE Trans on Power.
• [8]PHADKE A G,THORP J S,ADAMIAK M G.A new measurement technique for tracking voltage phases,local system frequency,and rate of change of frequency[J].IEEE Transactions on Power Apparatus and System,1983(5):1025-1038.
• [9]WANG M H,SUN Y ZH.A practical,precise method for frequency tracking and phase estimation[J].IEEE Trans on Power Delivery,2004,19(4):1547-1552.
• [10]胡钋,张宇,王粟.信号与系统[M].北京:中国电力出版社,2009.
• [11]刘金强.基于非整周期采样谐波有功功率计量研究[D].重庆:重庆大学,2010.
• [12]李静.数字式多功能电能计量装置的研制与开发[D].北京:华北电力大学,2008.
• [13]易龙强.基于一元线性回归理论的数字正弦信号频率测量算法[J].电测与仪表,2011,48(3):20-24.