摘要
傅里叶变换算法在供电质量监测系统中被用来进行谐波分析,如何加快分析速度和降低系统成本是当前这种监测系统设计关注的主要问题。TI公司的MSP430系统微控制器具有功耗低、供电范围宽及外围模块齐全等特点,适合实现各种监测设备。该系列芯片内部充足的数据存储器满足快速傅里叶变换算法过程中的数据存储,芯片内部大量的代码存储器存储相位因子的计算结果和所需要的三角函数数值,采用查表的方法以提高分析速度;采用芯片内部硬件乘法器模块可以进一步提高分析速度。实测结果显示对一个信号周期256个采样点的快速傅里叶变换分析,完成全部计算仅需要0.3 s的时间,前10次谐波的计算相对误差低于千分之一。所研制的在供电质量监测系统完全满足用户要求。
Fourier transform algorithm in power quality monitoring system was used to carry out harmonic analysis, how to speed up the analysis and reduce the system cost is a major concern in the current monitoring system design. TI＇s MSP430 microcontroller system with low power consumption, wide power supply range and complete peripheral module, suitable for all kinds of monitoring equipment. This series chip internal meet plenty of data memory fast Fourier transform algorithm in the process of data storage, storage chip inside a lot of code phase factor of trigonometric functions of the numerical calculation results and need, adopt the method of look-up table in order to improve the analysis speed; Using chip internal hardware multiplier module can be further improve the analysis speed. The measured results show that 256 sampling points of a signal cycle fast Fourier transform analysis, complete calculation need only 0.3s, the calculation of the first 10 harmonics of the relative error is less than one-thousandth. In power quality monitoring system developed by fully meet user requirements.
出处
《电子设计工程》
2015年第16期146-148,共3页
Electronic Design Engineering
基金
陕西省科技厅自然科学基础研究基金资助项目(2013JM1019)
西安航空学院校级科研立项(13XP13)
