EE1 PEEE Refresher Class Power Part 4 notes by T. Ernst

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EE1PEEE Refresher ClassPower Part 4notes by
T. Ernst
EE1 Power Part 4 Notes
Fall 2011, Page 1
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• Synchronous Machines
• Motors
• Generators
• Double fed induction (variable speed synchronous)
• VAR compensation
• Shunt capacitors
• Shunt reactors
• Series capacitors
• Series reactors

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Synchronous Machines
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Limits on field current variation
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Capability curve
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Synchronous Machine Nameplates
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Synchronous Impedance and over-current protection
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Xd , Xd and 3-phase fault current
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Significance of rated PF
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Significance of rated PF
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Double fed induction motor (AKA variable speed
synchronous)
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Xd 0.35 pu
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• Choose system bases
• Determine component impedances

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

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• Alternate solution Find KVAG such that Vmotor
  0.7 pu

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

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• Shunt capacitors
• PF correction
• Voltage regulation

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Shunt capacitors
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Shunt capacitors why do PF correction?
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Shunt reactors
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Series capacitors
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Series reactors
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