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Protection and Control of Modern Power Systems

Table 3 Sequence of relay operation of feeder 3 with conventional overcurrent protection scheme

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

Faulted Bus 22 without DG

Faulted Bus 22 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 22

0.07

2.00

0.864

548

Feeder 3

1.053

342

Maloperation

OR 21

0.10

2.100

0.840

953

Feeder 3

1.031

573

Maloperation

OR 20

0.14

2.200

0.817

1630

Feeder 3

1.012

938

Maloperation

OR 19

0.21

2.300

0.800

2950

Feeder 3

0.998

1620

Maloperation

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