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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 

選擇:0題,非選:7題 我要補題 回報試卷錯誤
【非選題】
1.

1. Fig. 1 shows a simple loop rotating in a uniform magnetic field. It has the following characteristics (25%):
62ecd164ab2f9.jpg
Suppose that a 5Ω resistor is connected as a load across the terminals of the loop.
62ecd1dcc5883.jpg


【題組】 (a) Calculate the voltage induced in the rotating loop (62ecd195b1e2f.jpg) and the current flowing through the resistor. (10%)



【非選題】
2.【題組】(b) Calculate the induced torque, electric power being generated and mechanical power being consumed by the loop. (15%)

【非選題】
3.

2. Calculate the geometric mean radius of conductors shown in Fig. 2 in terms of the radius r of an individual strand. (10%)
62ecd20142e61.jpg



【非選題】
4.3. Discuss the solution procedures for a power flow problem solved by a Netwon-Raphson technique. (including the procedure for swing bus, PV bus and PQ bus) (15%)

【非選題】
5.

4. The impedance matrix (62ecd225d6554.jpg) of a power system is
  62ecd2407b0f9.jpg
Calculate the short-circuit current for a three-phase fault occurred in bus 2 and determine the bus voltages during the fault (15%).



【非選題】
6.

5. Derive the solution for the following economic dispatch problem by Lagrangian multiplier (15%)
  62ecd27e0232f.jpg 



【非選題】
7.

6.Assume that the impedances for zero-sequence, positive-sequence and negative-sequence networks are Z0, Z1 and Z2 , respectively. Derive the formulas for I0, I1 , I2, and Ia and draw the interconnected sequence networks for a single line-to-ground fault as shown in Fig. 3 (20%)
62ecd30373612.jpg



懸賞詳解

國二理化下第三次

10.關於營養素的敘述,下列何者正確? (A)所有的酷類都是聚合物 (B)酵素是由蛋白質所組成,加熱不會產生變性效果 (C)油脂是由碳、氫、氧元素所組成的...

50 x

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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-阿摩線上測驗

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