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Table 2 Change information of measured admittance

From: New protection scheme for internal fault of multi-microgrid

Fault Position F1 F2 F3
Measured Admittance Δφ Gi Δφ Gi Δφ Gi
Double-terminal Feeder Fault 90°–270° and − 90°–90° Increases Significantly
Healthy 90°–270° or − 90°–90° Basically Unchanged 90°–270° or − 90°–90° Basically Unchanged 90°–270° or − 90°–90° Basically Unchanged
Single- terminal Feeder DG Feeder Fault 90°–270° Increases Significantly
Healthy –90°–90° Basically Unchanged –90°–90° Basically Unchanged –90°–90° Basically Unchanged
Load Feeder Fault –90°–90° Basically Unchanged –90°–90° Increases Significantly
Healthy –90°–90° Basically Unchanged –90°–90° Basically Unchanged