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A laboratory investigation of a digital protection technique for parallel transmission lines

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3 Author(s)
Gilany, M.I. ; Dept. of Electr. Eng., Cairo Univ., Giza, Egypt ; Malik, O.P. ; Hope, G.S.

A digital algorithm for the protection of parallel power transmission lines has been implemented on a 16-bit single board computer. It has been tested on a physical model consisting of two synchronous machines connected through a double circuit line. The algorithm is based on comparing magnitudes of currents of two parallel lines. Details of the experimental set-up and the results of online tests for various operating conditions are presented. A procedure to adjust the relay settings adaptively is also incorporated. The results illustrate the successful operation of the algorithm in detecting faults on parallel lines

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Power Delivery, IEEE Transactions on  (Volume:10 ,  Issue: 1 )