Swing Equation MCQ Quiz in मल्याळम - Objective Question with Answer for Swing Equation - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക
Last updated on Mar 26, 2025
Latest Swing Equation MCQ Objective Questions
Top Swing Equation MCQ Objective Questions
Swing Equation Question 1:
In a power system, the slack bus (or swing bus) is a special type of bus where the voltage magnitude and phase angle are specified. What is the primary function of the slack bus in power system analysis?
Answer (Detailed Solution Below)
Swing Equation Question 1 Detailed Solution
Swing Equation Question 2:
The swing equation of synchronous machine:
Answer (Detailed Solution Below)
Swing Equation Question 2 Detailed Solution
Swing Equation Question 3:
A 50 Hz 4 pole turbo generator rated at 20 MVA and 13.2 kV has an inertia constant of 9 MJ - MVA. If the input power to the machine is 20 MW and output power is 15 MW then the acceleration of the rotor is ______ rpm/sec.
Answer (Detailed Solution Below) 20.80 - 20.90
Swing Equation Question 3 Detailed Solution
Concept:
By swing equation:
M\( {d^2\theta_e \over dt^2}\) = Pm - Pe
where, M = Inertia constant
\( {d^2\theta_e \over dt^2}=\) Acceleration
The inertia constant is given by:
\(M = {GH\over 180f}\)
Calculation:
\(M = {20\times 9\over 180\times 50}\)
M = \( {1 \over 50}\) MJ
\( {d^2\theta_e \over dt^2}= {P_m-P_e \over M}\)
\({P\over2} {d^2\theta_m \over dt^2}= {(20-15)\times 50 \over 1}\)
\({d^2\theta_m \over dt^2}=125\) mechanical degree/sec
\({d^2\theta_m \over dt^2}=125\times ({1\over 360})\) rps/sec ( 360 mechanical degree/sec = 1 rps)
\({d^2\theta_m \over dt^2}=125\times ({60\over 360})\) rpm/sec
\({d^2\theta_m \over dt^2}=20.83 \) rpm/sec