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A novel algorithm for differential protection of untransposed transmission line using synchronized measurements
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A novel algorithm for differential protection of untransposed transmission line using synchronized measurements
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Conference Proceeding
A novel algorithm for differential protection of untransposed transmission line using synchronized measurements
2012
Overview
Although there has been a practice of transposition of transmission lines, most of the real life EHV/UHV lines are untransposed. The distance protection of such lines becomes very complicated. With the advent of Global Positioning System (GPS) and Fiber optics technology, current differential protection can be a better choice for such lines. This paper proposes current differential protection scheme for protection of untransposed transmission lines based on equivalent-π line model. The proposed differential relay basically works on difference of currents in series branch (computed) from equivalent-π line model. As the measurements are time synchronized, the performance of relay is immune to line charging current. The analysis has been carried out in phase coordinates. ATP/EMTP programs have been used to simulate system disturbance and algorithm is implemented MATLAB. The result shows the efficacy and robustness of proposed algorithm. (4 pages)
Publisher
The Institution of Engineering & Technology
ISBN
9781849196208, 1849196206
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