Primary Substation and Feeders (D2)
A 132/33 kV primary substation with twin transformers, a normally open bus coupler and four feeders including a dual-fed hospital.
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direction: down
grid: Transmission {
intake: 132 kV intake
}
sub: Primary substation {
t1: Transformer T1 - 132/33 kV 45 MVA
t2: Transformer T2 - 132/33 kV 45 MVA
bus: 33 kV busbar
bc: Bus coupler (normally open)
}
feeders: 33 kV feeders {
f1: Feeder 1 - industrial park
f2: Feeder 2 - hospital (dual fed)
f3: Feeder 3 - residential north
f4: Feeder 4 - rail traction supply
}
prot: Protection and control {
scada: SCADA RTU
relay: Distance and overcurrent relays
}
grid.intake -> sub.t1
grid.intake -> sub.t2
sub.t1 -> sub.bus
sub.t2 -> sub.bus
sub.bus -> sub.bc
sub.bus -> feeders.f1: 12 MW winter peak
sub.bus -> feeders.f2: 6 MW winter peak
sub.bus -> feeders.f3: 9 MW winter peak
sub.bus -> feeders.f4: 15 MW winter peak
prot.relay -> sub.bus: trip and auto-reclose
prot.scada -> prot.relay
sub.t1 -> prot.scada: tap position and oil temperature