PSA UNIT 4-I

How will you calculate the Per unit value?

• Base value/Actual value

• Actual value/Per unit value

• Per unit value/Actual value

• Actual value/Base value

List of parts of Power system.

• Generation, transmission and distribution.

• generation, transmission and transformer

• generation, impedance and distribution.

• Motor, transmission and distribution.

What are the different methods available to construct bus admittance matrix?

• Direct Inspection method

• Singular Transformation methods

• Both Direct Inspection method and Singular Transformation methods

• None of the above

Which is "NOT" an objective of the Power System Analysis??

• To design the circuit breakers

• To plan future expansion of the existing power system

• To analyze the system under different fault conditions and also to analyze the stability of the system

• To reduce the reliability of the power system

Choose the base MVA for the given power system:

G1: 100 MVA; 33 kV; X=10%

G2: 150 MVA; 33 kV; X=20%

G3: 200 MVA; 33 kV; X=15%

• 100 MVA

• 150 MVA

• 200 MVA

• 122.5 MVA

Which one has the correct order of steps to find bus admittance matrix using singular transformation method?

• 1.Multiplication of[AT][Y][A]

  2.Bus incidence Matrix

  3.Transpose of Bus incidence Matrix

  4.Oriented Graph

  5.Calculation of Yprimitive

• 1.Bus incidence Matrix

  2.Transpose of Bus incidence Matrix

  3.Oriented Graph

  4. Calculation of Yprimitive

  5.Multiplication of[AT][Y][A]

• 1.Oriented Graph

  2.Bus incidence Matrix

  3.Transpose of Bus incidence Matrix

  4.Calculation of Yprimitive

  5.Multiplication of [AT][Y][A]

• 1.Bus incidence Matrix

  2.Transpose of Bus incidence Matrix

  3.Oriented Graph

  4.Multiplication of[AT][Y][A]

  5.Calculation of Yprimitive

What is the per unit impedance Z_(Pu) in a power system

• ( Z * (MVA)_B) / (KV_B)²

• ( 1000 * (KV)_B) / √3 I_B

• ( Z * (KV)² ) / (MVA)_B

• None of these

Which among these is the connection diagram for line to line faults?

• Only a

• Only b

• Only c

• Only d

Which sequence this ?

• Positive sequence

• Negative sequence

• Zero sequence

• All

The operator a^2 is

• -0.5+j0.866

• -0.5-j0.866

• -1+j0.5

• -1-j0.5