Elec467 Power Machines & Transformers

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Presentation transcript:

Elec467 Power Machines & Transformers Electric Machines by Hubert, Chapter 9 Topic: Synchronous generators

Generator using a synchronous motor

Phasor diagram for one phase transitioning from motor to generator

Phasor transition from motoring to generating

Equivalent circuit Note: the phasor diagram here has been place over the phasor diagram for Fig 9-3c

Motor to generator transition

TWO generators on one bus

Technique for starting 2nd gen-pack

Tools to determine sychronousity

Droop

Load transfer

Load transfer 2nd look

Load transfer with different slopes

Adjusting governor effect

Instability

Mathematical take on load transfer

Example 9.3

Generator floating on the bus

Linearization of magnetization curve

DC test for equivalent resistance

Blocked Rotor test

Power loss in a generator Note that the usual power flow is reversed with Pin = Pshaft

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