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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