Initial Results for Cramér-Rao Lower Bound for Forced Oscillations in Power Systems

Initial Results for Cramér-Rao Lower Bound for Forced Oscillations in Power Systems

Forced oscillations threaten the reliability of wide-area power systems, and different approaches to estimate forced oscillation have been explored over the past several years. Though these efforts provide powerful tools to estimate a forced oscillation's amplitude, frequency, and phase, a benc...

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Bibliographic Details
Published in:2021 North American Power Symposium (NAPS) pp. 1 - 5
Main Authors: Xu, Zikai, Pierre, John W.
Format: Conference Proceeding
Language:English
Published: IEEE 14-11-2021
Subjects:
Benchmark testing
Estimation
Focusing
Frequency estimation
Numerical models
Power system reliability
Reliability
Online Access:Get full text
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Summary:Forced oscillations threaten the reliability of wide-area power systems, and different approaches to estimate forced oscillation have been explored over the past several years. Though these efforts provide powerful tools to estimate a forced oscillation's amplitude, frequency, and phase, a benchmark for estimation accuracy has not been available. This paper provides initial results in such a benchmark called the Cramér-Rao Lower Bound which is a lower bound on the variance in those estimates. A direct approach to derive Cramer-Ran Lower Bound of forced oscillation in power systems is given. In the end, the MinniWECC model is applied to assess the impact of different factors on the bound.
DOI:10.1109/NAPS52732.2021.9654610