Power Systems
The main objectives of power system is/are

 Flexible power has to be available.
 Cost of electrical energy per KWh is to be minimum
 Reliable power has to be available
All of these

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Power Systems
Which of the following statement is/are true?Zn

 both 1 and 2
 nether 1 nor 2
 The neutral grounding impedance Zn appears as 3Zn in zero sequence equivalent circuit
 The neutral grounding impedance Zn appears as Zn in zero sequence equivalent circuit

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Power Systems
Which statement is not correct for the transmission line parameter R, L, G and C

 For each line, the conductors are characterized by σ c, μ c, εo = ε c and the homog
 G = I/R. R is the AC resistance per unit length of conductor C.
 At high frequencies at which most of communication system operate the internal inductance of the conductor is neglected.
 The line parameter R,L,G and C are uniformly distributed along the entire length of the line C.

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