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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
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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%)
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PROBLEM 4 (10%) After dozing off in the Monday morning class, your classmate asked you: "Integral control adds negative phase, thus decreasing the phase margin. Why would we ever want to use integral control?" Explain how you would answer him. system.
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(a) Calculate the voltage induced in the rotating loop () and the current flowing through the resistor. (10%)
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(b) Calculate the induced torque, electric power being generated and mechanical power being consumed by the loop. (15%)
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2. Calculate the geometric mean radius of conductors shown in Fig. 2 in terms of the radius r of an individual strand. (10%)
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4. The impedance matrix () of a power system is Calculate the short-circuit current for a three-phase fault occurred in bus 2 and determine the bus voltages during the fault (15%).
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5. Derive the solution for the following economic dispatch problem by Lagrangian multiplier (15%)
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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%)
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(一)請選擇一個相關的傳播理論,針對此現象進行理論的應用與分析。分析時請先說明相關傳播理論的核心概念,而後以該理論來支持你(妳) 的分析倫點.(25%)
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(二)有人說造成這樣的結果的重要因素之一,是因為反同團體大量使用了社群媒體,你(妳)的看法如何?請詳細提出你(妳)的論點與分析.(25%)
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(一)請選擇一個相關的傳播理論,針對封關民調出現「剪刀開口」進行理論的應用與分析。分析時請先說明相關傳播理論的核心概念,而後以該理論來支持你(妳)的分析論點韓國瑜的「民蓋牌」是否是影響因素之一?請一併討論。(25%)
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