基于Blackman-Nuttall窗改进FFT校正的新型三相动态谐波电能表设计

陈向群; 高云鹏; 李典卿; 谢林瑾; 吴聪; 余敏琪

陈向群,高云鹏,李典卿,谢林瑾,吴聪,余敏琪.基于Blackman-Nuttall窗改进FFT校正的新型三相动态谐波电能表设计[J].电测与仪表,2020,57(9):132-139.
chengxiangqun,Gao Yunpeng,Li Dianqin,Xie Linjin,wu cong,Yu Minqi.Design of a new three phase dynamic harmonic power meter based on Blackman-Nuttall window and improved FFT correction[J].Electrical Measurement & Instrumentation,2020,57(9):132-139.

基于Blackman-Nuttall窗改进FFT校正的新型三相动态谐波电能表设计

Design of a new three phase dynamic harmonic power meter based on Blackman-Nuttall window and improved FFT correction

DOI：10.19753/j.issn1001-1390.2020.09.021

中文关键词: 谐波电能表 Blackman--Nuttall窗三谱线插值牛顿插值误差校正

英文关键词:Harmonic energy meter Blackman--Nuttall window Three spectral line interpolation Newton interpolation Error correction

基金项目:

作者中文名	作者英文名	单位
陈向群	chengxiangqun	国网湖南省电力有限公司长沙;智能电气量测与应用技术湖南省重点实验室
高云鹏	Gao Yunpeng	湖南大学电气与信息工程学院
李典卿	Li Dianqin	广东电网有限责任公司佛山供电局禅城供电局
谢林瑾	Xie Linjin	国网湖南省电力有限公司
吴聪	wu cong	湖南大学电气与信息工程学院
余敏琪	Yu Minqi	国网湖南省电力有限公司长沙;智能电气量测与应用技术湖南省重点实验室

摘要点击次数: 1825

中文摘要:

针对电网动态谐波检测与电能计量的急切需求,建立了改善动态谐波FFT频谱泄漏和旁瓣效应的基于Blackman-Nuttall窗三谱线改进FFT校正的谐波电能计量方法,提出了ADS1178＋TMS320C6745＋K60架构的新型三相动态谐波电能表的设计和研究方案,详细介绍了本文多通道、高采样率、同步采样ADC的数据采集和调理电路单元以及以高性能浮点DSP芯片TMS320C6745为核心的电网信号数据处理电路单元,提出了基于牛顿插值的动态谐波电能计量的误差校正方法,实验与测试表明新型三相谐波电能表的基波有功功率相对误差小于等于0.1%,基波无功功率相对误差小于等于1%,2-21次谐波电压幅值相对误差小于等于0.6%、谐波电流幅值相对误差小于等于0.7%、谐波相位误差小于等于0.5°,符合标准GB/T 14549-93中的A类谐波测量仪器相关精度要求。

英文摘要:

In order to meet the urgent needs of power grid dynamic harmonic detection and power metering, a harmonic power metering method based on Blackman-Nuttall window tri-spectral line is proposed to improve the spectrum leakage and sidelobe effect of dynamic harmonic FFT. A new three-phase harmonic power meter scheme based on ADS1178+TMS320C6745+K60 is proposed. The data acquisition and conditioning circuit unit of multi-channel, high sampling rate and synchronous sampling ADC and the grid signal data processing circuit unit with high performance floating-point DSP chip TMS320C6745 as the core are introduced in detail. The error correction method of dynamic harmonic energy metering based on Newton interpolation is also presented. The new three-phase harmonic energy meter developed on this basis has the following characteristics: the fundamental active power measurement error is less than 0.1%, the fundamental reactive power measurement error is less than 1%, the 2-21 harmonic voltage measurement error is less than 0.6%, the harmonic current measurement error is less than 0.7%, and the harmonic phase measurement error is less than 0.5 degrees, which meet the relevant accuracy requirements of the Class A harmonic measuring instruments in the standard GB/T 14549-93.

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