Low Computational Burden Adaptive Overcurrent Protection for Active Distribution Networks
Table 5
Operating time for the proposed adaptive and conventional protection approach for variation in DERs powers.
DER state
Relay
Conventional
Proposed
1
2
3
F
PR
BR
0.25
1
0.25
F1
R3
R1
0.462
0.659
0.196
0.462
0.665
0.203
F2
R5
R3
0.096
0.488
0.392
0.096
0.489
0.394
F3
R6
R3
0.286
0.488
0.202
0.286
0.489
0.203
F4
R8
R6
0.097
0.298
0.201
0.097
0.299
0.202
1
0.5
1
F1
R3
R1
0.459
0.659
0.200
0.440
0.663
0.203
F2
R5
R3
0.097
0.485
0.388
0.097
0.489
0.392
F3
R6
R3
0.290
0.485
0.195
0.290
0.490
0.200
F4
R8
R6
0.098
0.301
0.203
0.098
0.303
0.205
0.2
0.5
0.75
F1
R3
R1
0.463
0.659
0.196
0.463
0.668
0.205
F2
R5
R3
0.098
0.488
0.391
0.098
0.492
0.394
F3
R6
R3
0.291
0.488
0.197
0.291
0.492
0.201
F4
R8
R6
0.099
0.303
0.204
0.099
0.303
0.205
The times in column delta t for conventional and proposed approaches are bolded when relay misscoordination is presented for the conventional approach. In this situation, adequate relay coordination was obtained using the proposed approach.
