基于跟踪微分器的基波测量方法研究

电网基波参数特别是基波频率在谐波分析与治理中具有重要的地位，也是电能质量、电能计量以及电力系统控制等领域的重要技术指标。在非同步采样情况下，针对基于频域法测量基波频率存在频谱泄露现象和测算精度不高的问题，提出了基于跟踪微分器(Tracking Differentiator,TD)的基波参数时域测量方法。该方法的主要思想是将检测到的基波信号通过TD来获取基波跟踪信号及其微分跟踪信号，再通过这两个信号的最大幅值即可获取基波的幅值、频率和初相位参数。仿真结果表明，本文方法只需要60%额定工频周期窗口的样本数据即可获得较高精度的基波参数测算值，是一种有效的基波参数测量方法。

Research on Measuring Approach of Fundamental Signal Based on Tracking Differentiator

The fundamental parameters of power grid,especially the fundamental frequency,are important in harmonic analysis and governance,and are also important technical indexes in the fields of power quality,electric energy measurement and power system control.In the case of non-synchronous sampling,a time-domain measurement method of fundamental parameters based on tracking differentiator (TD) is proposed to solve the problems of spectral leakage and low accuracy of frequency domain method.Its main idea is to obtain fundamental tracking signal and its differential tracking signal through TD to track fundamental signal,and obtain the amplitude,frequency and initial phase parameters of the fundamental signal through the maximum values of these two signals.The simulation results show that the fundamental measured values with high accuracy can be obtained by the sample data of only 60% rated working frequency cycle window.Therefore,the proposed approach is an effective fundamental measurement method.