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A Fault Detection Technique for the Series-Compensated Line During Power Swing

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3 Author(s)
Nayak, P.K. ; Department of Electrical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India ; Pradhan, A.K. ; Bajpai, P.

A distance relaying scheme is susceptible to power swing. To avoid unintended trip operation during such conditions, a power swing blocking function is utilized in distance relays. However, if a fault occurs during power swing, the relay should detect the fault and trip as soon as possible. The detection of fault in a series-compensated line during the power swing is further complicated due to complex transients produced by series capacitor and the metal–oxide varistor (MOV) protecting it. This paper proposes a negative-sequence current-based technique for detecting all types of faults during the power swing in a series-compensated line. The technique is tested for different series-compensated systems including a 9-bus 3-machine power system. Different types of faults: symmetrical, asymmetrical, and high resistance occurring during the power swing are simulated through EMTDC/PSCAD to test the algorithm. The method is compared with available techniques and found to be accurate and fast.

Published in:

Power Delivery, IEEE Transactions on  (Volume:28 ,  Issue: 2 )

Date of Publication:

April 2013

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