What is it about?
In this paper, a new frame work is proposed using PC interfaced with a data acquisition card AD622, which acquires real-time signals of the currents, process them numerically in the computer and outputs tripping signal to the circuit breaker. All algorithms of differential protection function and blocking techniques have been implemented using the Simulink/ Matlab. To validate the present work, the performance of developed relay is tested by signals generated by Simulink/MATLAB simulator under different conditions.
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Why is it important?
A differential relay that is very sensitive relay operating even at its limits may be used for protecting a power transformer. However, this characteristic may lead to unnecessary tripping due to transient currents. In order to avoid this unnecessary tripping, estimated harmonics of these currents may be required which need great computation efforts.
Perspectives
The test results of this work show that this proposed scheme provides good discrimination between the transient currents and the internal fault currents.
Pr Hamid Bentarzi
Universite M'Hamed Bougara Boumerdes
Read the Original
This page is a summary of: A New Computer Based Differential Relay Framework for Power Transformer, November 2013, Springer Science + Business Media,
DOI: 10.1007/978-94-007-7262-5_54.
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