bdn2004
Electrical
- Jan 27, 2007
- 794
I'm looking at two different models of the same system. They should be alike, but they certainly aren't modeled alike.
On model 1: the Reactor is shown as 83 MVA, 3200A, Positive Sequence Impedance: 0.03 + 4.38j PU and this corresponds to a 0.0984 ohm impedance.
On model 2: the Reactor is shown as a 295 kVA, 1000A, Positive Sequence Impedance: 0.0001 + j0.0044j PU and also corresponds to a 0.0984 ohm impedance.
I know Ohms = Z% x [(kV)^2 * 10/]/kVA
The base MVA is 100 MVA, the system operating voltage is 15kV.
On model 1: the Reactor is shown as 83 MVA, 3200A, Positive Sequence Impedance: 0.03 + 4.38j PU and this corresponds to a 0.0984 ohm impedance.
On model 2: the Reactor is shown as a 295 kVA, 1000A, Positive Sequence Impedance: 0.0001 + j0.0044j PU and also corresponds to a 0.0984 ohm impedance.
I know Ohms = Z% x [(kV)^2 * 10/]/kVA
The base MVA is 100 MVA, the system operating voltage is 15kV.