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Swing Equation MCQ Quiz in தமிழ் - Objective Question with Answer for Swing Equation - இலவச PDF ஐப் பதிவிறக்கவும்

Last updated on Mar 26, 2025

பெறு Swing Equation பதில்கள் மற்றும் விரிவான தீர்வுகளுடன் கூடிய பல தேர்வு கேள்விகள் (MCQ வினாடிவினா). இவற்றை இலவசமாகப் பதிவிறக்கவும் Swing Equation MCQ வினாடி வினா Pdf மற்றும் வங்கி, SSC, ரயில்வே, UPSC, மாநில PSC போன்ற உங்களின் வரவிருக்கும் தேர்வுகளுக்குத் தயாராகுங்கள்.

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?

  1. It specifies the voltage magnitude and phase angle and does not contribute to the real and reactive power balance.
  2. It specifies the real power (P) and reactive power (Q) while the voltage magnitude and phase angle are calculated.
  3. It specifies the voltage magnitude and phase angle and adjusts its real and reactive power output to balance the system.
  4. It maintains the voltage magnitude and phase angle while the real and reactive power are calculated based on the load.

Answer (Detailed Solution Below)

Option 3 : It specifies the voltage magnitude and phase angle and adjusts its real and reactive power output to balance the system.

Swing Equation Question 1 Detailed Solution

In power system analysis, the slack bus (or swing bus) is crucial for maintaining system stability. It is assigned a fixed voltage magnitude and phase angle. The primary function of the slack bus is to balance the real and reactive power in the system. This means that while other buses have specified power injections or withdrawals, the slack bus adjusts its real and reactive power output as needed to ensure overall power balance in the system. Therefore, it compensates for the discrepancies between generated and consumed power, thus maintaining system equilibrium.

Swing Equation Question 2:

The swing equation of synchronous machine:

  1. determines steady state stabilty
  2. analyses the friction and windage loss
  3. describes the rotor dynamics of synchronous machine
  4. is a linear second order differential equation

Answer (Detailed Solution Below)

Option 3 : describes the rotor dynamics of synchronous machine

Swing Equation Question 2 Detailed Solution

The swing equation of a synchronous machine describes the rotor dynamics by relating the electrical power output, mechanical power input, and the inertia of the rotor. It is crucial in analyzing transient stability in power systems, ensuring that the rotor remains synchronized with the grid during disturbances. The equation is a nonlinear second-order differential equation, reflecting the complex interplay between mechanical and electrical torques. Therefore, it helps in understanding the dynamic behavior of the synchronous machine.

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 = Pm - Pe

where, M = Inertia constant

 Acceleration

The inertia constant is given by:

Calculation:

M =  MJ

 mechanical degree/sec

 rps/sec ( 360 mechanical degree/sec = 1 rps)

 rpm/sec

 rpm/sec

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