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 | ||