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access icon free Novel phasor sequence-based fault detection scheme for wide-area backup protection of series-compensated line

© The Institution of Engineering and Technology
Received 13/02/2020, Accepted 02/11/2020, Revised 01/10/2020, Published 07/12/2020

For series-compensated line, the distance relay finds its limitations during voltage inversion, current inversion, load encroachment, power swing and balanced fault during the power swing. These limitations can be overcome by wide-area backup protection schemes. This study proposes a novel fault detection technique utilising the synchrophasor data of voltage and current signals at system protection centre. The algorithm compares the phase angle difference between positive-sequence voltage phasor under system intact condition and real-time positive- or negative-sequence current phasor, which is computed from the synchronised data obtained from phasor data concentrator after identifying the possible critical buses to which the faulted line is connected. Different cases of fault type, distance and resistance have been considered to validate the proposed scheme with 3-generator, 9-bus western system coordinating council using MATLAB/Simulink platform. The results justify the suitability of the proposed scheme to be deployed for achieving more reliable performance.

Inspec keywords: power system reliability; fault diagnosis; synchronisation; fault location; phasor measurement; relay protection; power system faults

Other keywords: distance relay; synchrophasor data; phasor sequence-based fault detection scheme; phase angle difference; 9-bus western system coordinating council; voltage inversion; system protection centre; power swing; current signals; 3-generator western system coordinating council; Matlab-Simulink platform; system intact condition; load encroachment; series-compensated line; synchronised data; wide-area backup protection schemes; phasor data concentrator; voltage signals; current inversion; positive-sequence voltage phasor; real-time positive-sequence current phasor; negative-sequence current phasor; balanced fault

Subjects: Power transmission, distribution and supply; Power systems; Power system measurement and metering; Power system protection; Reliability

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