Title :
A Joint Frequency and Phasor Estimation Algorithm Using DFT Samples for Power Systems
Author :
Luoyang Fang ; Griffin, Robert ; Dongliang Duan ; Liuqing Yang
Author_Institution :
Colorado State Univ., Fort Collins, CO, USA
Abstract :
Frequency and phasor are two important parameters for power system monitoring and operation. While most frequency and phasor estimation algorithms are developed separately and only work for complex-valued signals, we propose an iterative joint frequency and phasor estimation method for real-valued signals in power systems. Our proposed method is tested alongside existing algorithms using both numerically by simulations and the experimentally by OpenPMU system, an open source platform for synchronized PMU and smart grid research. The comparisons show that our proposed method not only beats existing single-task algorithms for steady-state signals but also tracks the transient signals with time-varying frequency very well.
Keywords :
discrete Fourier transforms; frequency estimation; iterative methods; phase estimation; phasor measurement; smart power grids; DFT samples; OpenPMU system; complex-valued signals; iterative joint frequency-phasor estimation algorithm; open source platform; power system monitoring; power system operation; single-task algorithms; smart grid research; steady-state signals; synchronized PMU; time-varying frequency; transient signal tracking; Discrete Fourier transforms; Estimation; Frequency estimation; Interference; Joints; Time-frequency analysis;
Conference_Titel :
Green Technologies Conference, 2013 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4673-5191-1
DOI :
10.1109/GreenTech.2013.86