Cart (Loading....) | Create Account
Close category search window
 

Dynamic Phasor and Frequency Estimators Considering Decaying DC Components

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Rui Kun Mai ; Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China ; Ling Fu ; Zhao Yang Dong ; Kit Po Wong
more authors

When a power system experiences off-nominal conditions such as frequency deviation and power oscillation, the accuracy of phasor estimation may degrade. Moreover, the estimated value deviates farther from the theoretical value because of decaying DC components. New phasor estimators are proposed in this paper. They are able to handle the dynamic characteristics as well as the decaying DC components so as to improve the accuracy of phasor estimation. A new frequency estimator is proposed for this purpose. Two filters are employed to estimate the fundamental component and DC components, respectively. Then, least squares method (LSM) gives accurate estimation by reassigning the estimations obtained by short time Fourier transformation (STFT). The performance of the proposed algorithm is evaluated by computer-simulated signals, EMTDC-generated signals, and signals recorded by a commercial relay from real time digital simulator (RTDS). The evaluation results indicate that the proposed algorithms can achieve accurate phasor estimation, frequency estimation, and even power estimation in presence of frequency deviations and decaying DC components with a minimal increase of computational cost and time delay compared with the conventional STFT.

Published in:

Power Systems, IEEE Transactions on  (Volume:27 ,  Issue: 2 )

Date of Publication:

May 2012

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.