ELEG 330 Power System Analysis Problem 2: A generator is feeding 30 MW to an infinite...
3. A generator is feeding an infinite bus through transfer line J. The generator's power is p-0.8 p.u and cosq-0.85ind. In point A there is a zero resistant fault that causes the breakers Kı and K2to open 0.1 s after the fault. We shall presume that the fault is cleared while the breakers are open. Calculate: a) the power-angle at which the breakers must be re-closed at the latest to maintain stability the maximum time from breaker opening to re-closing...
Figure shows a single-line diagram of a three-phase, 60-Hz synchronous generator, connected through a transformer and parallel transmission lines to an infinite bus. All reactances are given in perunit on a common system base. If the infinite bus receives 1.0 per unit real power at 0.95 p.f. lagging. If circuit breakers B13 and B22 are opened after three cycles and then reclosed when the power angle reaches 35°.123.png Assume ωpu(t) = 1.0 pu in the swing equation. Assume that the temporary...
Problem 2. A 3-phase star-connected turbo-generator feeds power to 11 kV infinite bus, through two parallel transmission lines each having a reactance of452. The generator synchronous reactance is 3 Ω. (a) The mechanical input to alternator and its excitation are adjusted as that the operating power factor at alternator terminals is unity and rated current of 500 A is delivered. Calculate the alternator terminal and excitation voltages. Also determine the active and reactive powers delivered to the infinite bus. (b)...
Problem 2 (50 points): The generator in the figure generates and delivers 150 MW to the power system below. At steady state the generator regulates the generating station voltage (bus 1) to pu. The system voltage at bus 3 is 1.05 pu. 1. Compute the internal voltage and rotor angle of the generator under the above conditions. 2. The fault sequence for a solid three-phase fault on any of the line circuits consists of a delayed tripping of both circuit...
Problem #2 An industrial system bus is fed from an infinite bus thru a 150 MVA, 115kV/38kV, X=5% substation connected to a 75 MVA, 38kV/13.8kV, X-6.5% substation. A 25 MW, 13.8 kV, pf=.85, 3-phase, x=16% diesel generator is also connected to the industrial system bus. Several feeders are connected to the 38kV bus. If a fault occurs in one of such feeders, plot sag voltage at the 13.8kV bus vs. distance to fault with and without the generator contribution. The...