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Protection and Control of Modern Power Systems

Table 1 Sequence of relay operation of feeder 1with conventional overcurrent protection scheme

From: Adaptive overcurrent protection scheme coordination in presence of distributed generation using radial basis neural network

Faulted Bus 18 without DG

Faulted Bus 18 with DG penetration

Relay

Time dial

Pickup tap

Short circuit current (kA)

Time operation (ms)

Operation area

Short circuit current (kA)

Time operation (ms)

Operation area

OR17

0.06

2.4

0.495

176

Feeder 1

0.546

132

Maloperation

OR 16

0.07

2.450

0.479

349

Feeder 1

0.530

244

Maloperation

OR 15

0.10

2.460

0.466

557

Feeder 1

0.518

379

Maloperation

OR 14

0.19

2.470

0.454

1180

Feeder 1

0.507

778

Maloperation

OR 13

0.27

2.480

0.427

2140

Feeder 1

0.483

1296

Maloperation

OR 12

0.40

2.490

0.415

3630

Feeder 1

0.472

2091

Maloperation

OR 11

0.51

2.500

0.405

5300

Feeder 1

0.464

2878

Maloperation

OR 10

0.68

2.520

0.397

8200

Feeder 1

0.457

4189

Maloperation

OR 9

0.88

2.540

0.388

12,700

Feeder 1

0.450

5981

Maloperation

OR 8

1.14

2.560

0.380

20,000

Feeder 1

0.444

8516

Maloperation

OR 7

1.66

2.580

0.355

53,600

Feeder 1

0.425

15,204

Maloperation

OR 6

2.35

2.600

0.335

95,500

Feeder 1

0.411

25,562

Maloperation

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