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Power Systems

Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.5
 0.75
 0.25
 0.4

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Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (kVA)b/(KV)²b
 ZΩ* (MVA)b/((KV)²b *100)
 ZΩ* (MVA)b/(KV)²b
 ZΩ* (MVA)b*100/(KV)²b

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Power Systems
Buchholz relay is used for protection of

  transformer.
  alternator.
  none of these.
  bus bar.

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Power Systems
IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is

 none of these.
 10 sec.
  5 sec.
 20 sec.

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Power Systems
For flat voltage profile system, voltage regulation is

 50%
 100%
 0%
 any of the above

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Power Systems
An ACSR conductor has internal inductance 0.05 mH/Km for µr = 1. If this ACSR is replaced with another having µr = 2, then find the internal inductance?

 0.025 mH/Km
 0 mH/Km
 0.1 mH/Km
 0.05 mH/Km

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