A new protection scheme for fault detection, direction discrimination, classification, and location in transmission lines

This paper presents a new adaptive fault protection scheme for transmission lines using synchronized phasor measurements. The work includes fault detection, direction discrimination, classification, and location. Both fault-detection and fault-location indices are derived by using two-terminal synch...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2003-01, Vol.18 (1), p.34-42
Main Authors: Jiang, J.-A., Ching-Shan Chen, Chih-Wen Liu
Format: Article
Language:English
Subjects:
Classification
Digital relays
Discrimination
Fault detection
Fault location
Faults
On-line systems
Phasors
Position (location)
Power system protection
Power system relaying
Power transmission lines
Protective relaying
Transmission line measurements
Transmission line theory
Transmission lines
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Summary:This paper presents a new adaptive fault protection scheme for transmission lines using synchronized phasor measurements. The work includes fault detection, direction discrimination, classification, and location. Both fault-detection and fault-location indices are derived by using two-terminal synchronized measurements incorporated with distributed line model and modal transformation theory. The fault-detection index is composed of two complex phasors and the angle difference between the two phasors determines whether the fault is internal or external to the protected zone. The fault types can be classified by the modal fault-detection index. The proposed scheme also combines online parameter estimation to ensure protection scheme performance and achieve adaptive protection. Extensive simulation studies show that the proposed scheme provides a fast relay response and high accuracy in fault location under various system and fault conditions. The proposed method responds very well with regards to dependability, security, and sensitivity (high-resistance fault coverage).
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2002.803726