Table 4 Effect of variation of penetration level of the DG’s on the magnitude of fault current (differential and average) at distribution Line DL AB for a triple line to ground fault (abc-g) fault, with fault distance ratio (FDR) = 0.6 and fault resistance (Rf) = 20 Ω, respectively, where the microgrid is operated in islanded mode
DG Status | Phase | max (I Differential) (in A) | max (I Average) (in A) | ||
|---|---|---|---|---|---|
Half cycle Before Fault | Half cycle After Fault | Half cycle Before Fault | Half cycle After Fault | ||
All DGs ON | a | 0.8399 | 1716.7085 | 0.6075 | 457.5215 |
b | 0.8400 | 805.2776 | 0.6075 | 457.5215 | |
c | 0.8401 | 2033.4764 | 0.6076 | 457.5215 | |
DG1 Off | a | 0.7074 | 1443.1043 | 70.2482 | 492.0391 |
b | 0.7073 | 1289.4827 | 70.2729 | 492.0391 | |
c | 0.7074 | 619.6908 | 70.2943 | 492.0391 | |
DG1and DG2 Off | a | 0.4704 | 583.9226 | 46.2576 | 202.3372 |
b | 0.4703 | 661.2137 | 46.2112 | 202.3372 | |
c | 0.4699 | 801.3551 | 46.2462 | 202.3372 | |
DG1 DG2 and DG3 Off | a | 0.2334 | 215.5093 | 22.6099 | 76.1430 |
b | 0.2334 | 315.1619 | 22.6216 | 76.1430 | |
c | 0.2334 | 326.8790 | 22.6268 | 76.1430 | |
All DGs OFF | a | 0.0002 | 0.2610 | 0.0094 | 0.0779 |
b | 0.0002 | 0.2587 | 0.0094 | 0.0779 | |
c | 0.0002 | 0.2800 | 0.0094 | 0.0779 | |