Describe the synchronizing sequence to bring a generator into service in parallel with a running generator, using a synchroscope and lamps
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A: Given: Leakage reactance, Xl=7.9 Ω Armature reactance, Xad=7.7 Ω Field reactance, Xf=6.4 Ω
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A: FALSE
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Describe the synchronizing sequence to bring a generator into service in parallel with a running generator, using a synchroscope and lamps.
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- For Problem 3.18, the motor operates at full load, at 0.8 power factor leading, and at a terminal voltage of 10.45 kV. Determine (a) the voltage at bus 1, which is the generator bus, and (b) the generator and motor internal EMFs.A 60-MVA, 69.3 kV, 3-phase synchronous generator has a synchronous reactance of 15 Ω per phase and negligible resistance. The generator is delivered rated power at 0.8 pf leading at rated terminal voltage to an infinite bus bar. Determine the magnitude of the power angle.A 100KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the value of the induced emf voltage(line to line). Answer fast
- The symmetrical fault occurs in the terminals of the synchronous generator. Find the direct axis transient reactance of the synchronous generator under the transient period for the data given below, Leakage reactance(Xl)= 7 ohm, Armature reactance (Xad)= 7.4 ohm and field reactance (Xf)=4.2 ohm.Describe the principle of operation of a synchronous generator and explain how it maintains synchronization with the grid.-The sum of the armature reactance and.............reactance is the reactance of the synchronous generator after the short circuit fault is cleared. -The selection of number of generating sources to meet the expected load is called as economic dispatch. Select one: True False
- A three phase synchronous generator with negligible resistance and Xs=20 ohm has induced voltage as well as terminal voltage per phase equal to 230 V. for the load angle of 30o, power received by the bus is .........W.A three-phase, 250 MVA, 16 kV rated synchronous generator is feeding into an infinite bus bar at 15 kV. The generator has a synchronous reactance of 1.62 pu. It is found that the machine excitation and mechanical power input are adjusted to give E = 24 kV and power angle δ = 30◦. a) Determine the line current and active and reactive power fed to the generator terminal. b) With reference to part (a) current is to be reduced by 20% at the same power factor by adjusting mechanical power input to the generator and its excitation. Determine E, angle δ and mechanical power input. c) With the reduced current as in part (c), the power is to be delivered to generator terminal at unity power factor, what are the corresponding values of E and δ and also the mechanical power input to the generator. Per-unit values are given on machine rating as the base.What are synchronous generators, and how do they contribute to power generation and stability in the grid?
- A 100KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the value of the induced emf voltage(line to line).A 100KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the value of the induced emf voltage(line to line). 10 pointsExplain the operation of synchronous generators in a power system and their role in grid stability.