摘要
在许多电力系统保护和控制策略中必须精确测量和计算系统的频率更重要的是在线计算系统的频率和它的变化,并必须认真处理系统频率的波动来解释测量的准确性。一般频率计算方法只能用于计算不含谐波的正弦输入信号,针对这一不足,本文提出使用带通滤波器对输入信号进行数字滤波后再进行频率计算,以消除谐波产生的干扰。在此基础上,本文使用傅立叶算法对被采样信号精确滤波,从而实现了频率的精确测量。
In many power system protection and controlschemes it is necessary to accurately measure and track the system frequency.It is important to carry out on-line calculation of the supply frequency and its variation.Extra care is also needed to deal with significant frequency fluctuations to ensure satisfactory interpretation of the measurements.The common frequency measurement method can be applied to the input signal without harmonic wave.In view of existing shortcomings,the paper proposes to filter the input ...
出处
《微计算机信息》
北大核心
2008年第7期60-61,104,共3页
Control & Automation
基金
基金项目天津市应用基础研究计划面上项目(06YFJMJC00800)
关键词
频率测量
带通滤波器
傅立叶算法
Frequency measurement
Band pass filter
Fourier algorithm
