Quiz

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Year 2024

August
Week # 2 Quiz 5

Q1. In the network as shown in Fig, the marked parameters are p.u. impedances. The bus-admittance matrix of the network is

Q2. A transmission line is compensated with shunt capacitance. If the uncompensated transmission line surge impedance loading is \(SIL =400 MW\) and compensated transmission line has surge impedance loading has \(SIL^{'} = 500 MW\). Find the degree of shunt compensation.

Q3. If the severity of single line-to-ground fault at the terminals of an unloded star connected synchronous generator is greater than that of 3-phase faults, then _______ where, \(X_1\) is the positive sequence reactance of the generator, \(X_{g0}\) is the zero sequence reactance of the generator and \(X_n\) is the neutral reactance.

Q4. With the increase in the load power factor, the efficiency of the transmission line

Q5. A power system needs injection of VARs at

Q6. The design of insulation in EHV lines is based on

Q7. For a 500 Hz frequency Excitation, a 50 km long power line will be modelled as

Q8. The sequence components of the fault current are as follows: \(i_+ = j1.5 \: p.u., i_- = – j0.5 \: p.u., i_0 = –j1 \: p.u.\). The type of fault in the system is:

Q9. A cable has the following characteristics, \(L = 0.3 \mu H/m\) and \(C = 200 pF/m\). The velocity of wave propagation through cable is

Q10. What is the unit of synchronizing coefficient 'T' ?