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last reply by CpjJwWHV • 10 years ago • asked in Electrical Engineering, 2011
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last reply by CpjJwWHV • 13 years ago • asked in Electrical Engineering, 2011
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last reply by CpjJwWHV • 12 years ago • asked in Electrical Engineering, 2011
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Statement for Linked Answer Questions :
A solar energy installation utilizes a three-phase bridge converter to feed energy into power system through a transformer of 400 V/400 V, as shown below.
The energy is collected in a bank of 400 V battery and is connected to converter through a large filter choke of resistance 10 Ω.
[1] The maximum current through the battery will be [2 marks]
(A) 14 A
(B) 40 A
(C) 80 A
(D) 94 A[2] The kVA rating of the input transformer is [2 marks]
(A) 53.2 kVA
(B) 46.0 kVA
(C) 22.6 kVA
(D) 19.6 kVAlast reply by CpjJwWHV • 13 years ago • asked in Electrical Engineering, 2011
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Statement for Linked Answer Questions :
Two generator units G1 and G2 are connected by 15 kV line with a bus at the mid-point as shown below.
G1 = 250 MVA, 15 kV, positive sequence reactance X = 25 % on its own base
G2 = 100 MVA, 15 kV, positive sequence reactance X = 10 % on its own base
L1 and L2 = 10 km, positive sequence reactance X = 0.225 Ω/km
[1] For the above system, the positive sequence diagram with the p.u values on the 100 MVA common base is [2 marks]
[2] In the above system, the three-phase fault MVA at the bus 3 is
[2 marks]
(A) 82.55 MVA
(B) 85.11 MVA
(C) 170.91 MVA
(D) 181.82 MVAasked in Electrical Engineering, 2011
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