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Protection and Control of Modern Power Systems

Table 4 Sequence of relay operation of feeder 4 with conventional overcurrent protection scheme

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

Faulted Bus 24 without DG

Faulted Bus 24 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

OR 24

0.11

2.230

1.011

131

Feeder 4

1.351

77.7

Maloperation

OR 23

0.16

2.280

0.897

277

Feeder 4

1.250

143

Maloperation

OR 22

0.29

2.465

0.874

601

Feeder 4

1.232

293

Maloperation

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