2009-09-03 The Generation of Electric Energy Part II

2009-09-03 The Generation of Electric Energy Part II - The...

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The Generation of Electric Energy Part II Jovan Ilić ECE 18-418 Fall 2009
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Synchronous Machines • Can act as motors and generators • Generating power up to – 1500MVA in thermal power plants – 700MVA in hydro plants • DC excited rotor magnet revolving at a constant speed • AC current induced in the single or multiphase stator
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From: Electrical Power System Essentials Asynchronous Generator Types Four-pole salient-pole rotor Two-pole cylindrical rotor
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Synchronous Machine Model [2] • For steady state power systems analysis and control • Main mechanical components: – Rotor powered by the prime mover – Single or multiphase wound stator – Cooling system, about 1% thermal losses • Faraday’s law of induction is the main principle exploited
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Graphics from [2]
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Model Derivation CS H ds J ndA  H: Magnetic field intensity [A/m] J: Current density vector current density => field intensity => field density => flux => induced V Graphics from [2] Step 1 Step 2 Step 3 Step 4 STEP 1:
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ff C a
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2009-09-03 The Generation of Electric Energy Part II - The...

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