MCQs of Automatic Generation and Voltage Control (Power System Operation and Control - 2180909)

Power System Operation and Control (2180909) MCQs

MCQs of Automatic Generation and Voltage Control

Showing 11 to 20 out of 24 Questions

11.

Consider 100 MW, 50 Hz turbine generator has a speed regulation parameter R of 4 percent. How much will the turbine power increase if the frequency drops by 0.1 Hz with the speed changer setting unchanged?

(a)	5 MW
(b)	6 MW
(c)	7 MW
(d)	10 MW

12.

A 200 MVA alternator operates at no load at frequency of 50 Hz, it has an inertia constant of 5 MW-sec/MVA and the 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?

(a)	0.76 Hz
(b)	-0.76 Hz
(c)	0.85 Hz
(d)	-0.85 Hz

13.

A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, T_d = 0.5 sec. One of the transmission lines is tripped. So that output of the generator is reduced to 70 MW. Find the frequency deviation during this time?

(a)	0.56
(b)	-0.56
(c)	0.92
(d)	-0.92

14.

In which of the following frequency control method tie lines may be overloaded?

(a)	Flat frequency control
(b)	Flat tie line control
(c)	Parallel frequency
(d)	All of the above

15.

The equation of area control error(ACE) is

(a)	$A C E = ∆ P_{t i e} + b ∆ f$
(b)	$A C E = ∆ P_{t i e} - b ∆ f$
(c)	$A C E = ∆ P_{t i e} + \frac{1}{b ∆ f}$
(d)	$A C E = ∆ P_{t i e} - \frac{1}{b ∆ f}$

16.

Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

(a)	50 Hz
(b)	0.52 Hz
(c)	0.48 Hz
(d)	-0.52 Hz

17.

Load frequency and economic dispatch controller are working

(a)	Independently
(b)	Together with
(c)	Sequential
(d)	None of above

18.

Economical dispatch controller has

(a)	Fast response
(b)	Slow response
(c)	Very Fast response
(d)	None of above

19.

GRCs for which of the power plant is ignored

(a)	Hydro
(b)	Thermal
(c)	Nuclear
(d)	All of above

20.

The effect of speed governor dead band is that

(a)	Governor becomes dead
(b)	Increase or decrease in the speed occurs before position of control valve changes
(c)	Speed becomes constant
(d)	None of above

Showing 11 to 20 out of 24 Questions