【简答题】Music Club Music lessons(guitar, violin, piano and drums) Time: 8:30 am-9:30 am every Sunday Price: Only $20 each Address: 25 Jiefang Road Tel: 420-258-1200 National Park Riding horses Boating Time: ...
【简答题】一台100MVA、60Hz的三相同步发电机,由具有常值同步速度的原动机驱动,电机的电抗标幺值和时间常数如下 X" d =0.20p.u.,τ" d =0.04s X'=0.30p.u.,τ' d =1.0s X d =1.20p.u.,τ a =0.25s 电枢绕组初始时开路,调整励磁电压,使电枢机端电压为额定值(标幺值为1p.u.)。在转子交轴与a相磁轴重合即δ=π/2时,同步电机发生三相对称短...