EE 8702_PSOC_UNIT 2_QUIZ_PART 2

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

• Flat frequency control

• Flat tie line control

• Parallel frequency

• All of the above

The equation of area control error(ACE) is

•  $ACE=ΔPtie+bΔf$  

•  $ACE=ΔPtie−bΔf$  

•  $ACE=ΔPtie+1bΔf$  

•  $ACE=ΔPtie−1\ bΔf$  

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?

• 50 Hz

• 0.52 Hz

• 0.48 Hz

• -0.52 Hz

Load frequency and economic dispatch controller are working

• Independently

• Together with

• Sequential

• None of above

Economical dispatch controller has

• Fast response

• Slow response

• Very Fast response

• None of above

GRCs for which of the power plant is ignored

• Hydro

• Thermal

• Nuclear

• All of above

The effect of speed governor dead band is that

• Governor becomes dead

• Increase or decrease in the speed occurs before position of control valve changes

• Speed becomes constant

• None of above

Governor dead bad cause due to

• Mechanical friction

• Backlash

• Valve overlaps in hydraulic relays

• All of above

In the presence of GRCs and dead band, the system becomes

• Highly non-linear

• Linear

• Non-linear

• None of above

Advantage of Digital controllers is

• More accurate and reliable

• Compact in size and more flexible

• Less sensitive to noise and drift

• All of above