Effects of Phasor Measurement Uncertainty on Power Line Outage Detection

Phasor measurement unit (PMU) technology provides an effective tool to enhance the wide-area monitoring systems (WAMSs) in power grids. Although extensive studies have been conducted to develop several PMU applications in power systems (e.g., state estimation, oscillation detection and control, volt...

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Bibliographic Details
Published in:IEEE journal of selected topics in signal processing 2014-12, Vol.8 (6), p.1127-1139
Main Authors: Chen, Chen, Wang, Jianhui, Zhu, Hao
Format: Article
Language:English
Subjects:
Bayes methods
Bayesian criterion
Criteria
Electric power lines
Error detection
Error probability
Hypotheses
Measurement uncertainty
Monitoring
multi-hypothesis test
Outages
Phasor measurement units
Phasors
PMU
power line outage detection
Power lines
POWER TRANSMISSION AND DISTRIBUTION
Smart grids
State estimation
Uncertainty
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Summary:Phasor measurement unit (PMU) technology provides an effective tool to enhance the wide-area monitoring systems (WAMSs) in power grids. Although extensive studies have been conducted to develop several PMU applications in power systems (e.g., state estimation, oscillation detection and control, voltage stability analysis, and line outage detection), the uncertainty aspects of PMUs have not been adequately investigated. This paper focuses on quantifying the impact of PMU uncertainty on power line outage detection and identification, in which a limited number of PMUs installed at a subset of buses are utilized to detect and identify the line outage events. Specifically, the line outage detection problem is formulated as a multi-hypothesis test, and a general Bayesian criterion is used for the detection procedure, in which the PMU uncertainty is analytically characterized. We further apply the minimum detection error criterion for the multi-hypothesis test and derive the expected detection error probability in terms of PMU uncertainty. The framework proposed provides fundamental guidance for quantifying the effects of PMU uncertainty on power line outage detection. Case studies are provided to validate our analysis and show how PMU uncertainty influences power line outage detection.
ISSN:1932-4553
1941-0484
DOI:10.1109/JSTSP.2014.2333493