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首頁 > 中山◆電機◆電路學 > 102年 - 102 國立中山大學_碩士班招生考試_電機系(丁組)：電路學#110202 >

題組內容

6.(20pt) Assume the PV is a current source inverter to deliver 1kW average power to the system.

(A)Calculate I. (5pt)

其他申論題

3.(10pt) A balanced Y-connected load is connected to the generator by a balanced transmission line with impedance of 0.1+j0.2Ω per phase. The load is rated at 500kW, 0.866 power factor lagging, 254Vms phase voltage. Find line current and line voltage of the generator, respectively?

4.(10pt) Phase voltage and phase current of a load are given as v(t)=141cosotV, i()=14sin(ωt+30°) A. Find average power and reactive power of the load.

(a) RMS current. (5pt)

(b) Average power consumed by the resistor. (5pt)

(B)Calculate IL. (5pt)

(C)Calculate power factor. (5pt)

(D)How to improve the power factor to 0.95. (5pt)

1.Find minimum inductance L to keep the converter operated in continuous conduction mode.(10pt)

2.Ripple current on the inductor. (10pt)

3.Draw waveforms of both diode voltage and inductor current. (10pt)

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