Adaptive coordination of relays in AC microgrid considering operational and topological changes
Conventional protection schemes are vulnerable to varying changes in a microgrid with
different types of distributed generators (DGs), which alter the fault current levels, leading to
miscoordination of directional over-current relays (DOCRs). Due to limited storage in
numeric relays, having one setting for each network scenario in the relays is infeasible. Also,
schemes with one setting considering grid-connected mode (GCM) and islanded mode (IM)
of operation with multiple scenarios may be infeasible for a microgrid with inverter-interfaced …
different types of distributed generators (DGs), which alter the fault current levels, leading to
miscoordination of directional over-current relays (DOCRs). Due to limited storage in
numeric relays, having one setting for each network scenario in the relays is infeasible. Also,
schemes with one setting considering grid-connected mode (GCM) and islanded mode (IM)
of operation with multiple scenarios may be infeasible for a microgrid with inverter-interfaced …
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