Advanced protection and control for a power system serving industrial customers

To serve industrial customers in the Monterrey, México area, Iberdrola Energía Monterrey completed a project that consisted of building five 115/13.8 kV substations, several 115 kV lines, and the protection and control system for the 115 kV and 13.8 kV networks. In this paper, we describe the protection and control system of the 115 kV network, which uses multifunction relays with communications and logic programming abilities. We describe an adaptive protection and control logic that allows operators to reconfigure the network for some permanent faults and adapts relay settings to the new network configuration. We show the results of a PCS factory-staged test, provide system operation statistics, and describe the protection scheme operation for an actual fault event.