500 =27735/-5631° 10+j15 2=32343/-115346°A 1-l2=29.8721.88°4 5=081=100×27735/563 =2773.556319VA S.=-U,l2=-100/90°×32.343/115.346° =32343/25346VA 闪四 西南交通大学西南交通大学 VA S U I u s s = ° = = ´ ° 2773.5 56.31 1 100 27.735 56.31 * 1 1 & A j I = ° + = 27.735 - 56.31 10 15 500 1 & I & 3 = I & 1 - I & 2 = 29.872 11.887° A I & 2 = 32.343 -115.346° A VA S U I u s s = ° = - = - °´ ° 3234.3 25.346 2 100 90 32.343 115.346 * 2 2 & VA S U I u s s = ° = - = - °´ ° 3234.3 25.346 2 100 90 32.343 115.346 * 2 2 &