Steelmaking Line Protection Legacy Functions and New Horizons

This paper proposes a sentinel system to overcome hidden failures that affect legacy protection functions of line conductors. This system overcomes the drawbacks of legacy protection functions due hidden failures by implementing a new global deviation factor of ideal conditions of electrical systems. This approach allows to overcome non detectable faults that lead to missoperations and selectivity problems. The application results of the proposed system are shown on a steel manufacturer user showing its improvements. Also, this sentinel system is implemented in a real time environment to test its performance. This paper allows to identify some of the problems of legacy protection functions and identify some benefits in the new horizons of line conductor protection.