Chapter 7: Sensitivity enhancement via adaptive methods for phase DOCR in active electrical networks with high CIGRs connection
Abstract
The application of time overcurrent relays in electrical networks presents serious limitations in terms of sensitivity. A disproportionate increase in load density, combined with insufficient investment of subtransmission and distribution lines, leads to a situation in which electrical systems are subjected to more rigorous high-load conditions. The adjustment of an overcurrent relay is mostly compromised because the minimum values of fault current and relay adjustment are comparable, making correct fault detection difficult. A fault under minimum demand conditions represents a minimal current contribution, ...
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