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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LL
 LLL
 LG
 LLG

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Power Systems
A transmission line has self and mutual impedances are 0.8 and 0 pu respectively. Find the positive, negative and zero sequence impedances respectively?

 0.8, 0.8 and 0.8 pu
 0.6, 0.6 and 1.2 pu
 0.6, 0.6 and 0.6 pu
 0.6, 0.8 and 1.2 pu

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Power Systems
Two generating stations delivering a powers of P1 = 150 MW, P2 =100 MW and the B coefficients are B11 = 0.005, B22 = 0.002, B12=B21= -0.001. Find the transmission line losses?

 102.5
 95.5
 105.2
 85.5

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Power Systems
Sparse matrix is matrix which contain

 more number of memory elements
 more number of zeros
 more number of non zeros
 less number of memory elements

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Power Systems
Which of the following is low specific speed turbine?

 Pelton
 Francis
 Kaplan
None of these

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Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

  3.000 pu.
 0.125 pu.
 0.200 pu.
 0.075 pu.

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