EE1 PEEE Refresher Class Power Part 4 notes by T. Ernst EE1 – Power Part 4 NotesFall 2011, Page 1.

EE1PEEE Refresher Class

Power Part 4

notes by T. Ernst

EE1 – Power Part 4 Notes Fall 2011,

Fall 2011,

EE1 – Power Part 4 Notes

• Synchronous Machines• Motors• Generators

• Double fed induction (variable speed synchronous)• VAR compensation • Shunt capacitors• Shunt reactors• Series capacitors• Series reactors

Fall 2011,


Synchronous Machines

Fall 2011,


Limits on field current variation

Fall 2011,


Capability curve

Fall 2011,


Synchronous Machine Nameplates

Fall 2011,


Synchronous Impedance and over-current protection

Fall 2011,


Xd” , Xd’ and 3-phase fault current

Fall 2011,


Significance of rated PF

Fall 2011,


Double fed induction motor (AKA: variable speed synchronous)

Fall 2011,


Xd’ = 0.35 pu

Fall 2011,


• Choose system bases• Determine component impedances

Fall 2011,


• Draw a pu equiv. circuit• Solve for KVAG such that Vsyst = 0.3 pu

Fall 2011,


• Alternate solution: Find KVAG such that Vmotor = 0.7 pu

Fall 2011,


• Draw a pu equiv. circuit w/o transformer• Solve for KVAG such that Vmotor = 0.7 pu

Fall 2011,


Shunt capacitors•PF correction•Voltage regulation

Fall 2011,


Shunt capacitors

Fall 2011,


Shunt capacitors – why do PF correction?

Fall 2011,


Shunt reactors

Fall 2011,


Series capacitors

Fall 2011,


Series reactors

Fall 2011,


EE1 PEEE Refresher Class Power Part 4 notes by T. Ernst EE1 – Power Part 4 NotesFall 2011, Page 1.

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