Accurate Superimposed Component Estimation for Improved Relay Performance During Power Swing

There is continuous variation in amplitude, phase, and frequency of voltage and current signals during power swing in a power system. Such variation makes the memorized prefault data less accurate to be used as nonfault component while computing superimposed quantity for protection decisions during...

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Bibliographic Details
Published in:IEEE systems journal 2022-12, Vol.16 (4), p.6119-6129, Article 6119
Main Authors: Paladhi, Subhadeep, Pradhan, Ashok Kumar, Rao, J. Ganeswara
Format: Article
Language:English
Subjects:
Accuracy
Electric potential
Estimation
Fault location
Frequency estimation
Numerical relaying
power swing
power system faults
Power system reliability
Power system stability
Relay
Relaying
Relays
superimposed component
Time-frequency analysis
Voltage
Voltage measurement
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Summary:There is continuous variation in amplitude, phase, and frequency of voltage and current signals during power swing in a power system. Such variation makes the memorized prefault data less accurate to be used as nonfault component while computing superimposed quantity for protection decisions during power swing. In this article, the voltage and current signal characteristics during power swing are analyzed and a technique is proposed to obtain correct nonfault components for superimposed quantity computation. The accuracy of the method in estimating the nonfault components is observed for different power swing conditions simulated in a 39-bus New England system and field data. The relay performance improvement as observed is also provided while applying the method to directional relaying, fault type classification, and fault location applications for faults during power swing. Comparative assessment reveals the superiority of the proposed method in improving the accuracy of the superimposed components computed during power swing.
ISSN:1932-8184
1937-9234
1937-9234
DOI:10.1109/JSYST.2021.3138758