谐波电能量监测终端设计  

Design of a harmonic power monitoring terminal

作　　者：彭显刚[1] 戴乔旭[1] 聂一雄[1] 邓小康[2] 

机构地区：[1]广东工业大学自动化学院,广州510006 [2]广东电网公司湛江供电局,广东湛江524005

出　　处：《电测与仪表》2015年第6期39-43,共5页Electrical Measurement & Instrumentation

摘　　要：针对使用加窗插值算法校正快速傅里叶变换出现的计算量大、速度慢、硬件要求苛刻的问题,提出了一种基于嵌入式平台的谐波电能量监测终端软硬件设计方案。硬件上采用16位6通道同步采样的ADC和具有浮点运算单元的ARM为核心单元,软件上提出了"基于谱线重心的M阶余弦窗"加窗插值的改进算法,该终端能实现对30次以内谐波电能的计量及电能质量分析,并具备数据显示、存储、传输等功能。实验数据表明,该谐波电能量监测终端达到了GB/T14549-1993中A类测量仪器的精度要求。所采用的加窗插值算法使硬件设计得以精简,对谐波电能计量表计的设计具有较好的参考价值。To solve the situation that using windowed interpolation algorithm to correct FFT encounters problems such as the large computation,computing slowly and hardware demanding,this paper presents an embedded harmonic power monitoring terminal.The harmonic power measurement algorithm of the monitoring terminal is based on cosine window gravity-spectrum-line interpolation.Using 16 bits six-channel synchronous-sampling A/D converter and ARM with hardware floating point unit as the core of hardware,the monitoring terminal not only has the capacity to measure the harmonic power and analyze the power quality,but also has the functions of data display,storage and transmission.Experimental data has shown that the developed harmonic power monitoring terminal meets the accuracy requirements of the A class harmonic measurement instruments according to GB/T 14549-1993.The cosine window gravity-spectrum-line interpolation algorithm,which can reduce the hardware requirements,is a good reference to the harmonic energy meter design.

关 键 词：谐波电能量 监测终端 加窗插值算法 谱线重心 ARM 

分 类 号：TM933.4[电气工程—电力电子与电力传动]