动态电能计量算法研究综述  

A review on dynamic energy metering algorithms

作　　者：邵方静 宋晓林 刘坚 雷婧婷 尉怡青 赵伟[2] Shao Fangjing;Song Xiaolin;Liu Jian;Lei Jingting;Yu Yiqing;Zhao Wei(Marketing Service Centre(Measurement Centre),State Grid Shaanxi Electric Power Company,Xi’an 710199,China;Department of Electric Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网陕西省电力公司营销服务中心(计量中心),西安710199 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电测与仪表》2023年第4期1-10,共10页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(52077112)。

摘　　要：能源互联网背景下,电网表现出“双高”和“双随机”特征,致使其电压、频率随机且频繁出现波动变化,引发新的电能质量问题。动态条件下如何实现电能的准确计量,以保证其公平公正,已越来越受到关注。文章从稳态和动态两方面对现有电能计量算法进行梳理和归纳,总结点积和与快速傅里叶变换等稳态算法的原理、技术特征及对信号动态变化的不适用性;对估计基波频率类动态算法,以及短时傅里叶变换、小波变换、希尔伯特-黄变换和S变换等时-频分析类动态算法的原理、技术特点、局限性等进行比较和分析;并重点归纳了小波变换方法的优缺点及应用前景。在此基础上,对动态电能计量算法的未来研究给出了建议。In the context of Energy Internet,the power grid exhibits the characteristics of“double high”and“double random”,causing random,frequent,unpredictable voltage and frequency fluctuations and hence new power quality issues.It has attracted some attention on how to realize the accurate measurement of electric energy under dynamic conditions so as to ensure the fairness and justice of the energy trade.This paper reviews the existing energy metering algorithms from both steady-state and dynamic aspects and summaries their principles,technical characteristics,and inapplicability of the steady-state algorithms,such as dot product sum and fast Fourier transform become unfit to dynamic measurement signals.The principle,technical characteristics,and limitations of dynamic algorithms for estimating fundamental frequency,as well as time-frequency analytical dynamic algorithms including short-time Fourier transform,wavelet transform,Hilbert-Huang transform,and S-transform,are compared.Specifically,the advantages and disadvantages of the wavelet transform method and its application prospects are summarized.Finally,the future research trends of dynamic energy metering algorithms are discussed.

关 键 词：功率理论 电能计量 快速傅里叶变换 时-频分析 小波变换 

分 类 号：TM93[电气工程—电力电子与电力传动]