摘要
分析了电力参数微机监测中的直接采样计算法与谐波分析法的误差 ,并提出了减小误差的方法。采用硬件锁相倍频技术和加窗的复序列FFT算法 ,研制了电力参数网络化测量装置 ,给出了装置软硬件设计方法 ,采用了高速A/D转换器ADS7864实现对 6路信号同时采样 ,避免了由于不同时采样而造成的相位差 。
The errors of harmonic wave analysis and direct sampling in electric parameters measurement are analyzed. The method to minimize errors is presented. A device is developed using synchronous sampling method based on phase-locked loop and complex sequence FFT based on window. The hardware and software designs are presented. The high-speed A/D converter ADS7864 is applied to realize data acquisition with high precision and in this way the phase error is avoided, improving the measurement precision.
出处
《青岛大学学报（工程技术版）》
CAS
2004年第4期67-71,共5页
Journal of Qingdao University(Engineering & Technology Edition)
基金
青岛大学科研基金资助重点项目 (2 0 0 36 )
关键词
复序列FFT
电力参数测量
同步采样
误差
complex sequence FFT
electric parameters measurement
synchronous sample
error
