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Fault location scheme for a multi-terminal transmission line using synchronized Voltage measurements

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1 Author(s)
S. M. Brahma ; Electr. Eng. Dept., Widener Univ., Chester, PA, USA

This paper describes a new scheme to locate a fault on a multi-terminal transmission line. It describes a simple new algorithm to identify the faulted section first. Then, to exactly locate the fault on this section, a method is described that uses the synchronized voltage measurements at all terminals. The main advantage of this method is that the current-transformer errors in the current measurements can be avoided. Since these errors can be as high as 10%, the fault location is extremely accurate with this method. The scheme can work for transposed as well as untransposed lines and is free of prefault conditions. The paper, after describing the scheme, describes very promising results from an Electromagnetic Transients Program simulation of a multi-terminal transmission line.

Published in:

IEEE Transactions on Power Delivery  (Volume:20 ,  Issue: 2 )