用数字信号处理技术实现电源频率的无噪声检测

常规的测量电源系统工作频率的方法易受噪声和谐波的影响。该文介绍一种用来测量电源系统工作频率的新方法。该方法基于数字信号处理技术，采用滑动数据窗算法，能对电源频率附近40Hz范围内频率信号进行正确地无噪声检测，并易于用现有技术实现。文中详细介绍了该测量系统的设计、算法以及采用数字信号处理技术的实现方法。

Noise-free Estimates of Power System Frequency Using a Digital Signal Processing Technique

The common method of measuring a power system operating frequency is easily affected by the noise and harmonics. This paper describes a new technique for measuring the operating frequency of a power system. Using the digital signal processing technique and the algorithm of the sliding data window, the technique provides correct and noise free estimates for near nominal, nominal, and off nominal frequencies in about 40Hz.The proposed technique can be economically implemented with the presently technology available. The design, algorithm, and implementation of a digital signal processing technique for measuring frequency are presented in the paper.