基于Prony算法的基波频率测量方法

Research on fundamental frequency measurement based on Prony algorithm

针对电网频率跟踪测量的问题,提出了一种基于Prony算法的基波频率测量方法。首先通过CIC组合滤波器从原始信号中提取出基波信号,再利用Prony算法进行频率跟踪测量。该方法可以有效地抑制原始信号中的直流、谐波和噪声,降低测量系统的基波频率测量偏差。实验仿真结果表明,该算法响应速度快,测量精度高,测量结果满足电网监测和电能计量的精度要求。

Aiming at the problem of frequency tracking measurement of power grid,a method of fundamental frequency measurement based on Prony algorithm is proposed. Firstly,the fundamental signal is extracted from the original signal by CIC composite filter,and then the Prony algorithm is used for frequency tracking measurement.The method can effectively suppress the DC,harmonic and noise in the original signals,also can reduce the measurement error for the fundamental frequency of the measurement system. The simulation results show that the algorithm has high response speed and high measuring precision,and it can satisfy the accuracy requirements of the power network monitoring and the energy metering.