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Table 5 Optimal relay setting with NI, VI, EI and mixed relay characteristics for dual setting DOCR in islanded mode

From: Coordination of dual setting overcurrent relays in microgrid with optimally determined relay characteristics for dual operating modes

Relay

NI relay characteristics

VI relay characteristics

EI relay characteristics

Mixed relay characteristics

RCI

Forward

Reverse

Forward

Reverse

Forward

Reverse

Forward

Reverse

TMS

PS

TMS

PS

TMS

PS

TMS

PS

TMS

PS

TMS

PS

TMS

PS

TMS

PS

R1

0.1

0.5

0.3990

1.7560

0.1

0.6179

0.8838

1.0268

0.1

1.1507

0.6248

1.6556

0.4037

0.5

0.8180

1.5353

2

R2

0.1

0.5

1.1

1.9999

0.1

0.7874

1.1

2

0.5490

0.5543

1.1

1.9860

0.6568

0.5

1.1

2

2

R3

0.1001

0.5107

0.1

0.5

0.1110

0.5

0.1

0.5

0.1

0.9322

0.1036

0.5

0.1499

0.7313

0.1

0.5

2

R4

0.1

0.5

1.1

2

0.1

0.5001

1.1

1.9994

0.1361

0.5150

1.1

1.9989

0.1

0.5

1.0999

1.9999

1

R5

0.1001

0.5

0.8837

0.5627

0.1746

0.5

0.2198

0.8933

0.1296

1.2249

0.1773

0.8465

0.3070

0.7862

0.4373

0.7167

2

R6

0.1

0.5023

1.1

2

0.1078

0.7464

1.1

2

0.2603

0.8131

1.1

1.9987

0.1082

0.7492

1.1

2

1

R7

0.1

0.5033

0.2640

1.0202

0.1

0.5

1.0687

0.5626

0.1

0.75

0.9422

0.75

0.1693

0.5258

1.1

0.6901

2

R8

0.1

0.5

1.0332

1.6895

0.1

0.5

1.1

2

0.1707

0.5212

1.1

1.9033

0.1690

0.5230

1.1

2

2

R9

0.1

0.5

0.9751

0.7813

0.1001

0.5

0.4204

1.7383

0.1

0.6063

1.1

1.6982

0.1421

0.5

0.5146

1.7406

2

R10

0.1

0.5

1.0968

1.9100

0.1126

0.5286

1.1

1.9979

0.3576

0.5108

1.1

1.9918

0.3705

0.5

1.1

2

2

R11

0.1

0.5

1.0970

2

0.1269

0.5

1.1

2

0.1779

0.7685

1.0928

1.9973

0.3679

0.53

1.1

2

2

R12

0.1001

0.5

0.8712

1.6211

0.1

0.5

0.9056

1.7699

0.1173

0.5078

0.7916

1.9945

0.1284

0.5

0.9226

1.5083

2

R13

0.1

0.5

1.1

2

0.1346

0.5

1.1

2

0.4711

0.5079

1.1

2

0.3753

0.5548

1.1

2

2

R14

0.1

0.5

0.1

0.7615

0.1

0.5128

0.3620

0.9708

0.1970

0.5121

0.9614

0.75

0.1

0.7111

0.9115

0.7626

2

R15

0.1

0.5

1.1

1.5384

0.1315

0.5026

0.8687

2

0.4680

0.5

1.1

1.3455

0.4483

0.5

1.1

1.6245

2

R16

0.1

0.5

0.3807

2

0.1121

0.5

0.9770

1.0648

0.3744

0.5

0.6468

1.45

0.1999

0.6384

1.0960

1.2421

2

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3.9882 (s)

   

1.7765 (s)

   

1.6928 (s)

   

1.6345 (s)

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