An on-line relay coordination algorithm for adaptive protectionusing linear programming technique |
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Authors: | Chattopadhyay B. Sachdev M.S. Sidhu T.S. |
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Affiliation: | Mehta Tech Inc., Eldridge, IA; |
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Abstract: | An adaptive system for protecting a distribution network should determine and implement relay settings that are most appropriate for the prevailing state of the power system. This paper presents a technique for determining coordinated relay settings. The technique uses the Simplex two-phase method; Phase I determines whether the constraints selected for illustrating the conditionality between primary and back up relays are feasible, and Phase II finds the optimal relay settings. A looped distribution system, protected by directional overcurrent relays, was used for testing the technique. The tests were conducted in a laboratory environment; some results from those tests are reported in the paper |
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