摘要
针对电力网络存在的问题,对类正弦信号频率偏移以及高次谐波干扰的情况下实现精确测量,提出选择采样角度进行快速傅里叶变换,以达到精度最大化的方法。通过Matlab实现仿真实验,少量采样点的数学证明以及实际利用MAX197为模拟数字转换器的数据采集系统的检验,证明该方法可以在不提高采样速率的情况下,大幅度提高测量的精度。
For power network parameter measuring,when the frequency departure of sine-like sig-nal or high-order harmonic disturbance occur,fast Fourier transform is used to control the initial sampling angle for maximum precision.The proposed method improves the system precision without increasing sampling speed,which has been verified by simulation with Matlab,mathematical proving and test in a data acquisition system with MAX 197 as its A /D converter.
出处
《电力自动化设备》
EI
CSCD
北大核心
2005年第8期56-59,共4页
Electric Power Automation Equipment
