Power Systems Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be 0.45 pu 0.15 pu 0.25 pu 0.05 pu 0.45 pu 0.15 pu 0.25 pu 0.05 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of shunt compensation is/are All of these It requires less maintanance single unit can be used as both capacitance and inductor by adjusting the excitation smooth voltage regulation is possible by controlling excitation All of these It requires less maintanance single unit can be used as both capacitance and inductor by adjusting the excitation smooth voltage regulation is possible by controlling excitation ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time? 0.76 Hz 0.85 Hz -0.85 Hz -0.76 Hz 0.76 Hz 0.85 Hz -0.85 Hz -0.76 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV? 0.05 0.02 0.025 0.25 0.05 0.02 0.025 0.25 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the disadvantages of phase modifiers? All of these It consumes both active and reactive power Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment All of these It consumes both active and reactive power Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generating station has a maximum demand of 50 MW a load factor of 60 %, a plant capacity factor of 45 % and if the plant while running as per schedule were fully loaded. The daily energy produced will be 710 MW. 720 MW. 740 MW. 730 MW. 710 MW. 720 MW. 740 MW. 730 MW. ANSWER DOWNLOAD EXAMIANS APP
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