Customer wants to distribute power from a 10MVA 13200V-13800V to a 25MVA 13800V-6500V transformer. As a newbie I have issues understanding A) Is this even possible, B) Would the inrush of the 25MVA transformer cause massive voltage drops on the line, C) If there is any code in regard to connecting transformers of this type(I've checked but couldn't find anything)
When using SKM PowerTools to model this situation, using a motor to simulate the inrush currents, I expect approximately 13000A(12 x FLA) and this agrees with the TCC drawing, but the one line load flow study indicates closer to 4550A at ~5200V, a 63% V drop. I am unsure if this is reasonable or if using a motor to simulate transformer inrush is way out in left field.
When using SKM PowerTools to model this situation, using a motor to simulate the inrush currents, I expect approximately 13000A(12 x FLA) and this agrees with the TCC drawing, but the one line load flow study indicates closer to 4550A at ~5200V, a 63% V drop. I am unsure if this is reasonable or if using a motor to simulate transformer inrush is way out in left field.
