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Powers at the two sides of a transformer not equal

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Yaodan Hu
Yaodan Hu 2019 年 11 月 7 日
コメント済み: Yaodan Hu 2019 年 11 月 7 日
Hello guys, I'm running a system as shown in the figure below:
sys.PNG
Supposedly, the powers at the both sides of the transformer should be equal, but it turns out they are not. Below is the figure of the active power (top) and the reactive power (bottom) of the power at both sides. The problem should comes from the two voltage sources but I'm still confused about why this would happen. Can anyone kindly help me solve the problem please? I appreciate your assistance.
left.PNG
right.PNG

  2 件のコメント

dpb
dpb 2019 年 11 月 7 日
I "know nuthink!" (to quote Sgt Schultz) about Simulink, but unless it's an ideal transformer there are bound to be losses....I don't know since the figures aren't labeled what they represent so didn't pay any attention to trying to make any sense out of them.
Yaodan Hu
Yaodan Hu 2019 年 11 月 7 日
Oh sorry for the inconvenience. The figures in the first scope represents the active (top) and reactive (bottom) power of the left side of the transformer, and the same for the second scope. I understand that there might be some losses, but the difference between the two sides are just too large to ignore. I tried to replace one of the voltage source with a resistor and the results are much better, so I think the problem is because of the two voltage sources on two sides.

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