MatLab Simulation -Modeling of the Siemens 7UT6 Differential Protection Relay

Abstract

 In today’s demanding business environment, modeling the power system has become necessary in order for utilities to make the right decision when it embarks on any form of asset expansion. Modeling allows the proposed system to be checked for any potential problems, such as mal-operation and incompatibility. The Siemens 7UT6 differential protection relay is used for power transformer differential protection and is capable of protecting transformers of any vector group. This paper covers the steps of modeling the 7UT6 relay and the application of the modeled relay in testing a protection system. A demonstration tripping of vector group D11 will be shown and the fault currents discussed. Graphs showing the phase voltages and currents will be inspected.

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