非同步采样情况下有功电能时域计量新方法
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赵良德(1970),男,硕士,高级工程师,主要从事电磁测量技术研究;Email:1640655235@qq.com

中图分类号:

TH89,TM714

基金项目:

国家自然科学基金(70871074)


A new time domain measurement method of active electric energy under nonsynchronous sampling
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    摘要:

    在非同步采样情况下,使用FFT分析电网信号时,会出现频谱泄漏现象,从而降低有功电能的计算精度。为保证基波和谐波有功电能的测算精度,提出时域分析基波和谐波参数的计算方法。该方法通过对基波信号进行积分来获取基波参数,在此基础上,建立基于傅里叶级数的电压和电流信号模型,并使用递推最小二乘法对采集的电压和电流信号进行模型辨识来获取基波和谐波参数,从而实现基波和谐波有功电能的测算。数值仿真结果表明,该方法不仅具有较高的有功电能测算精度,而且只需要3个额定工频周期窗口的采集数据即可获得基波和谐波的最优参数,进而可以预先获得10个额定工频周期窗口的有功电能,因而是一种有效的有功电能计量方法。

    Abstract:

    If a power grid signal is analyzed by the FFT algorithm in the case of nonsynchronous sampling, it will cause the spectral leakage, and calculation precision reduction of active electric energy. In order to ensure calculation accuracy of fundamental and harmonic active electric energy, a timedomain calculation method for fundamental and harmonic parameters is proposed. Fundamental parameters are calculated by the integral of fundamental signal. On this basis, voltage and current signal models are established based on Fourier series. Fundamental and their harmonic parameters are then identified by using the RLS algorithm to match the sample data of voltage and current signals. As a result, the measured values of fundamental and harmonic active electric energy are obtained. The numerical simulation results show that the proposed method has high measurement accuracy of active electric energy. The optimal parameters of fundamental and harmonic are obtained by the sample data in only three rated cycle windows in working frequency. In this way, the active electric energy of the ten rated operating frequency period can be obtained in advance. Hence, it is an effective measurement method of active electric energy.

    参考文献
    [1] 陈垒,赵伟,肖勇,等.非整周期采样条件下有功电能计量的新算法[J].仪器仪表学报,2017,38(4):861869.CHEN Lei,ZHAO Wei,XIAO Yong,et al.New active electric energy measurement algorithm under nonintegerperiod sampling[J].Chinese Journal of Scientific Instrument,2017,38(4):861869.
    [2] 吴超凡,陈隆道.应用于电力谐波分析的改进相位差校正法[J].电工技术学报,2017,32(7):158164.WU Chaofan,CHEN Longdao.Improved phase difference correction method applied to power harmonic analysis[J].Transactions of China Electrotechnical Society,2017,32(7):158164.
    [3] 王泽,杨洪耕,袁晓冬.IEC框架下非同步采样时的谐波和间谐波测量方法[J].电力系统自动化,2015,39(3):6975.WANG Ze,YANG Honggeng,YUAN Xiaodong.Measuring methodof harmonics andinterharmonics withnonsynchronous sampling in IEC framework[J].Automation of Electric power systems,2015,39(3):6975.
    [4] 曾喆昭,文卉,王耀南.一种高精度的电力系统谐波智能分析方法[J].中国电机工程学报,2006,26(10):23 27.ZENG Zhezhao,WEN Hui,WANG Yaonan.An approach with high accuracy for intelligent analysis for power system harmonics[J].Proceedings of the CSEE,2006,26(10):2327.
    [5] 杨金涛,乐健,汪妮,等.谐波背景下电能计量系统的计量误差分析[J].电力系统自动化,2015,39(13):144150.YANG Jintao,LE Jian,WANG Ni,et al.Analysis of measurement error for electric energy metering system under harmonic conditions[J].Automation of Electric power systems,2015,39(13):144150.
    [6] 刘冬梅,杨重良,何怡刚,等.基于RifeVincent自卷积窗三谱线插值FFT电力谐波分析[J].电子测量与仪器学报,2016,30(9):13511360.LIU Dongmei,YANG Chongliang,HE Yigang,et al.Harmonic analysis of power system based on RifeVincent selfconvolution window triplespectralline interpolation FFT[J].Journal of Electronic Measurement and Instrumentation,2016,30(9):13511360.
    [7] 张鸿博,蔡晓峰,鲁改凤.基于双窗全相位FFT双谱线校正的电力谐波分析[J].仪器仪表学报,2015,36(12):28352841.ZHANG Hongbo,CAI Xiaofeng,LU Gaifeng.Doublespectrumline correction method based on doublewindow allphase FFT for power harmonic analysis[J].Chinese Journal of Scientific Instrument,2015,36(12):28352841.
    [8] 黄奂,卢泉,黄阳,等.基于奇异值分解和总体最小二乘一旋转矢量不变技术的电力系统基波频率测量方法[J].电测与仪表,2014,51(16):7884.HUANG Huan,LU Quan,HUANG Yang,et al.A fundamental frequency measurement method for power system based on singular value decomposition and TLSESPRIT[J].Electrical Measurement & Instrumentation,2014,51(16):7884.
    [9] Thomas D W P,Woolfson M S.Evaluation of frequency tracking methods[J].IEEE Transactions on Power Delivery,2001,16(3):367371.
    [10] 磨少清,李啸骢.一种高精度的改进傅里叶测频算法[J].电力系统自动化,2003,27(12):4849+54.MO Shaoqing,LI Xiaocong.An improve highaccuracy algorithm for frequency measurement based on fourier transform[J].Automation of Electric Power Systems,2003,27(12):4849+54.
    [11] Aghazadeh R,Lesani H,SanayePasand M.New technique for frequency and amplitude estimation of power system signals[J].Proceedings of the IEEE,2005,152(3):435440.
    [12] Pradhan A K,Routray A,Basak A.Power system frequency estimation using least mean square technique[J].IEEE Transactions on Power Delivery,2005,20(3):18121816.
    [13] 吴杰康,龙军,王辑祥.基于数字微分算法的系统频率快速准确测量[J].电工技术学报,2004,19(4):9397.WU Jiekang,LONG Jun,WANG Jixiang.An algorithm for power system frequency measurement based on numerical differentiation[J].Transactions of China Electrotechnical Society,2004,19(4):9397.
    [14] 王勇,付志红,张淮清,等.基于前馈神经网络的电网基波高精度检测[J].电网技术,2011,35(8):124128.WANG Yong,FU Zhihong,ZHANG Huaiqing,et al.High precision detection of dundamental of power grid based on back propagation neural network[J].Power System Technology,2011,35(8):124128.
    [15] 王允建,谢贝贝,胡治国.电力谐波检测迭代变权最小二乘快速基波提取方法[J].系统仿真学报,2014,26(12):29912995.WANG Yunjian,XIE Beibei,HU Zhiguo.Rapidly fundamental wave detection of electric power harmonic detection based on iteration variable weight least square algorithm[J].Journal of System Simulation,2014,26(12):2991 2995.
    [16] 李军,王越超.一种基于幅值调制的新型电力系统正弦频率测量方法[J].电工技术学报,2015,30(7):144150.LI Jun,WANG Yuechao.A novel power system sinusoidal frequency measurement method based on amplitude modulation[J].Transactions of China Electrotechnical Society,2015,30(7):144150.
    [17] 刘理云,曾喆昭.基于曲线拟合模型的电网基波测量原理研究[J].系统仿真学报,2016,28(11):27982803+2812.LIU Liyun,ZENG Zhezhao.Measuring principle research on fundamental wave of grid based on curve fitting model[J].Journal of System Simulation,2016,28(11):27982803+2812.
    [18] 张开明,庄磊,黄丹,等.基于跟踪微分器的基波测量方法研究[J].测控技术,2018,37(9):117120+125.ZHANG Kaiming,ZHUANG Lei,HUANG Dan,et al.Research on measuring approach of fundamental signal based on tracking differentiator[J].Measurement and control technology,2018,37(9):117120+125.
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引用本文

赵良德,庄 磊,黄 丹,等.非同步采样情况下有功电能时域计量新方法[J].电力科学与技术学报,2020,35(1):68-74.
ZHAO Liangde, ZHUANG Lei, HUANG Dan, et al. A new time domain measurement method of active electric energy under nonsynchronous sampling[J]. Journal of Electric Power Science and Technology,2020,35(1):68-74.

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  • 在线发布日期: 2020-08-20
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