An Advanced Real-Time Synchronized Goertzel algorithm in Smart Power Meter

Abstract

In order to solve the problems of complicated calculation and poor real-time performance in measuring the electrical parameters of the traditional smart meter, this paper proposed a real-time Synchronized Goertzel algorithm which can be well applied in the smart meter (SM) system. By processing the voltage and current data collected from the grid terminal, the algorithm can obtain the information of frequency, energy and waveform with time labels, so as to realize low cost, efficient measurement and transmission of grid monitoring information in the Internet of Things (IoT). At the same time, the algorithm can adapt to the change of power grid frequency, calculate the RMS values of voltage and current with high accuracy, avoiding the problem of inaccurate energy evaluation caused by the fixed frequency constant of smart meter. Furthermore, the efficacy of the proposed algorithm has been evaluated by theoretical calculation and validation in MATLAB/Simulink environment.