Explain how active load and reactive load sharing is achieved between synchronously connected generator sets
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Explain how active load and reactive load sharing is achieved between synchronously connected generator sets.
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- In a long-shunt compound generator, the terminal voltage is 220 Vwhen generator delivers 110 A. Determine (a) induced emf and (b)total power generated. Given that shunt field, series field,diverter and armature resistances are 90 Ω, 0.025 Ω, 0.04 Ω and0.03 Ω respectively.Which of the following is true for the phasor diagrams drawn according to the ohmic, inductive and capacitive operating states of a round pole synchronous generator? a) Due to the voltage Efd, the excitation current is equal in capacitive operation and inductive operation b) Due to the voltage Efd, the excitation current is large in capacitive operation and small in inductive operation c) Due to the voltage Efd, the excitation current is small in ohmic operation and larger in inductive operation d) Due to the voltage Efd, the excitation current is small in capacitive operation and large in inductive operation.A 60 MVA, 69.3kV, three-phase synchronous generator has a synchronous reactance of 15 ohms/phase and negligible armature resistance. The generator is delivering rated power at 0.8 power factor lagging at the rated terminal voltage to an infinite bus bar. What is the maximum three-phase power that can be generator can deliver before losing its synchronism?
- Draw voltage phasor diagrams for different load cases of salient synchronous generators and derive the expression of the induced voltage.Q/ During the test of separately excited generator the speed of rotation must be held constant and the generator field resistance must be adjusted to make the generator terminal voltage 220V at no load. True FalseThe magnitude of the no-load, line-neutral voltage induced on the ‘a’-phase stator windings of a synchronous 3 phase generator is |Ea | = 480 V. Presume the stator winding resistance is negligible, and that the synchronous reactance is Xs = 1.1 Ω. The full-load, per-phase current magnitude for the generator is 30 A at a power factor of 0.8 leading . For these conditions: a. What is the line-neutral ‘a’-phase terminal voltage, Vథ? b. What is the power angle (?)? c. What is the percent voltage regulation? d. What is the total 3 PHASE complex, real, and reactive power delivered to the load?
- what The parameters of the synchronous generators?Discuss the importance of synchronizing generators in a power plant and the consequences of asynchronous operation.The magnitude of the no-load, line-neutral voltage induced on the ‘a’-phase stator windings of a synchronous 3? generator is |?a | = 480 V. Presume the stator winding resistance is negligible, and that the synchronous reactance is ?௦ = 1.1 Ω. The full-load, per-phase current magnitude for the generator is 30 A at a power factor of 0.8 leading . For these conditions: a. What is the line-neutral ‘a’-phase terminal voltage, ?థ? b. What is the power angle (?)? c. What is the percent voltage regulation? d. What is the total 3? complex, real, and reactive power delivered to the load?