Abstract
Observations of slow frequency signals in power systems have been explained by continuum wave equations that approximate the system's electromechanical dynamics. These continuum models predict that the signal speed is a function of the rotational inertia of the generators and impedances of the transmission lines. Here, we show that frequency signals with speeds modulated by these factors are predicted by the swing and Kirchhoff equations, without resorting to a continuum model. Our analysis also shows that the precision of the sensors used to measure frequency has a significant impact on the apparent speed of the frequency signal.
| Original language | English |
|---|---|
| Article number | 6352872 |
| Pages (from-to) | 840-844 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Circuits and Systems II: Express Briefs |
| Volume | 59 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2012 |
Funding
This brief has been authored by UT-Battelle, LLC, under Contract DE-AC05-00OR22725, with the U.S. Department of Energy. By accepting the article for publication, the publisher acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, and worldwide license to publish or reproduce the published form of this brief or allow others to do so, for the U.S. Government purposes. Manuscript received May 11, 2012; revised August 3, 2012; accepted September 16, 2012. Date of publication November 16, 2012; date of current version January 4, 2013. This work was supported by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory under Contract DE-AC05-00OR22725. This brief was recommended by Associate Editor K.-H. Chen.
Keywords
- Electromechanical waves
- frequency sensor
- power systems