谐波工况下相位补偿对全波计量影响

目前全波计量模式下的智能电能表由于前端电压和电流采样电路为两个独立的采样通道,两个通道对电压和电流相位的偏移非一致性会产生电压和电流信号间的附加相位差。这种附加相位差在基波工况下可以通过相位补偿技术在校表环节得到大大减小。但在谐波工况下这种基于基波的相位补偿会对高次谐波会产生过相位补偿,从而对电能表全波有功计量产生影响。通过对现有智能电能表全波有功计算算法、相位补偿技术进行分析,建立谐波工况下相位补偿对全波计量误差分析模型,最后通过仿真算例,量化分析相位补偿技术对全波计量的影响。...

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Bibliographic Details
Published in电测与仪表 Vol. 53; no. 21; pp. 71 - 75
Main Author 周超 纪峰 田正其 祝宇楠 刘建
Format Journal Article
LanguageChinese
Published 国网江苏省电力公司电力科学研究院国家电网公司电能计量重点实验室,南京,211103 2016
Subjects
FFT
全波计量
智能电能表
相位补偿
相位补偿
smart meters
智能电能表
phase compensation
全波计量
FFT
total electric energy metering
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ISSN1001-1390

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Summary:目前全波计量模式下的智能电能表由于前端电压和电流采样电路为两个独立的采样通道,两个通道对电压和电流相位的偏移非一致性会产生电压和电流信号间的附加相位差。这种附加相位差在基波工况下可以通过相位补偿技术在校表环节得到大大减小。但在谐波工况下这种基于基波的相位补偿会对高次谐波会产生过相位补偿,从而对电能表全波有功计量产生影响。通过对现有智能电能表全波有功计算算法、相位补偿技术进行分析,建立谐波工况下相位补偿对全波计量误差分析模型,最后通过仿真算例,量化分析相位补偿技术对全波计量的影响。
Bibliography:Zhou Chao, Ji Feng, Tian Zhengqi, Zhu Yunan, Liu Jian （State Grid Jiangsu Electric Power Company Research Institute, State Grid Key Laboratory of Electric Power Metrology , Nanjing 211103, China ）
23-1202/TH
smart meters; total electric energy metering; phase compensation; FFT
The voltage front-end voltage and the current sampling circuit for smart meters with total electric energy metering models are two independent channels,so there exists extra phase error because of the different attenuation characteristics of the two channels. The extra phase error can be effectively reduced by the phase compensation technology under fundamental power frequency condition. However,the phase compensation based on fundamental power frequency can result in phase over compensation for the high order harmonic component,which will result in the effect on total electric energy metering accuracy. This paper will conduct an error analysis from the aspects of total electric energy metering algorithm and the phase compensation technolo
ISSN:1001-1390