基于非侵入式负荷识别的交流电压幅值测量  

AC Voltage Amplitude Measurement Based on Non-Intrusive Load Identification

作　　者：苏欣 袁葆 张瑞 安亚刚 吕云彤 SU Xin;YUAN Bao;ZHANG Rui;AN Yagang;LÜYuntong(State Grid Hebei Marketing Service Center,Shijiazhuang 050000,Hebei,China;Beijing China-Power Puhua Information Technology Co.,Ltd.,Beijing 100085,China)

机构地区：[1]国网河北省电力有限公司营销服务中心,河北石家庄050000 [2]北京中电普华信息技术有限公司,北京100085

出　　处：《电网与清洁能源》2022年第12期101-106,共6页Power System and Clean Energy

基　　金：国家电网有限公司总部资助科技项目(kj-2019-028)。

摘　　要：为增强电网稳定性运行的控制效果,以及获得准确的交流电压谐波分量,提出一种基于非侵入式负荷识别的交流电压幅值测量方法。采集工作中电器内单个物理量展现出的叠加负荷特性,利用傅里叶变换将连续的交流电压负荷信号转换成离散形式,并识别非侵入式负荷,得到各次谐波分量;通过差分采样不断调节正弦电压和交流电压,确保二者之间差值持续最小;引入加权傅里叶变换算法处理电压数据,降低误差的影响,完成了电压幅值的准确测量。仿真实验中所测量出的相位和谐波幅值均符合FLUKE 6105A技术指标,表明该方法测量精度高、抗干扰性强。To enhance the stability control effect of power grid operation and obtain accurate harmonic components of AC voltage,a method of measuring AC voltage amplitude based on non-invasive load identification is proposed.The superimposed load characteristics of a single physical quantity in the electrical appliance are collected,and the continuous AC voltage load signal is converted into discrete form by Fourier transform,the non-invasive load is identified,and the harmonic components are obtained.Sinusoidal voltage and AC voltage are constantly adjusted by differential sampling to ensure that the difference between them is kept at a minimum.The weighted Fourier transform algorithm is introduced to process the voltage data,reduce the influence of errors,and complete the accurate measurement of voltage amplitude.In the simulation experiment,the measured phase harmonious wave amplitude accords with FLUKE 6105A technical specifications,which proves that the method has high measurement accuracy and strong anti-interference.

关 键 词：非侵入式负荷识别 交流电压 傅里叶变换 差分采样 正弦电压 

分 类 号：TP352.3[自动化与计算机技术—计算机系统结构]