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104年 - 104 國立中山大學_碩士班招生考試_電機系(丁組)：電力工程#110208
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題組內容
1. The impedance matrix (ZBus) for Fig.I can be expressed as eq. (1). (25%)
(a) Calculate the Z matrix after the line between Bus 2 and Bus 4 is removed； (15%)
相關申論題
(b) Assuming the bus voltages before fault are all 1.0p.u. Calculate the short circuit current when a three-phase short-circuit fault occurred at Bus 3 for (a) and bus voltages after this fault. (10%)
#471767
(a) the zero-, positive- and negative-sequence line-to-neutral voltages ； (5%)
#471768
(b) the zero-, positive- and negative-sequence line-to-line voltages； (5%)
#471769
(c) the zero-, positive- and negative-sequence line currents. (5%) (All answers should be in p.u.)
#471770
3.Calculate the line flows and power flows from Bus i to Bus j and Bus j to Bus i for Fig. 2 and the line loss for this line (all values in Fig. 2 are in p.u.). (20%)
#471771
(a) Determine the swing equation and the initial operating power angle. (10%)
#471772
(b) Calculate the critical clearing time for the generator when a three-phase bolted short-circuit at the generator terminals causes Pe =0. (15%)
#471773
(a) unity power factor,
#471774
(b) lagging power factor and
#471775
(c) leading power factor. (15%)
#471776
相關試卷
104年 - 104 國立中山大學_碩士班招生考試_電機系(丁組)：電力工程#110208
104年 · #110208
103年 - 103 國立中山大學_碩士班招生考試_電機系(丁組)：電力工程#110072
103年 · #110072
102年 - 102 國立中山大學_碩士班招生考試_電機系(丁組)：電力工程#109115
102年 · #109115
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