《电机原理及拖动基础》变压器测验题2010[1].10(8)

SN UNIN I 1N K

U1phU2ph

750KVA3 10KV 10/0.4/ 43.3A 25

Ukph 5.5% 10000/3 317.54V,Ikph 43.3A317.54

7.33 43.3pk2400

rk 0.427 2

3 43.323 IkphZk

2

xk zk rk2 7.332 0.4272 7.317

Z'fz I1ph

.

11

Zfzk2 252(1.272 j0.954) 265 j198.75 33.10000/3 005773.503 000 I1l 17.18 37.8A'

265.427 j206.07Zk Zfz

I2ph I2l kI1ph 25 17.18 429.54A11

U2ph I2ph zfz 429.54 1.59 227.656V

33U2l 3U2ph 3 227.656 394.31V

P1 U1NI1cos 104 17.18cos37.80 235123.53W11

Rfz 3 429.542 1.272 234689.866W33P235123.53 1100% 100% 99.8%

P2234689.866

2P2 3I2ph