Electrical Engineering Department

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Electrical Engineering Department
Electric Generator Done by Abdullah
Al-Hulaimi ID214917 For Dr shwahdi
10 May 2005
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Electrical Engineering Department
1.INTRODUCTION
10 May 2005
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Electrical Engineering Department
BACKGROUND
10 May 2005
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Electrical Engineering Department
TYPES OF GENERATOS
10 May 2005
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Electrical Engineering Department
AlQURRAH POWER PLANT GENERATORS
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Electrical Engineering Department
Overview

• Manufacturer Mitsubishi Heavy Industries
• Rated Speed 3600 rpm
• Number of Phases 3
• Frequency 60 Hz
• Number of Poles 2 poles
• Voltage Output (nominal) 2 0 kV
• Hydrogen Gas Pressure 4.0 barg
• Apparent Power Output 735,200 kVA
• True Power Output 625,000 kW
• Rated Current Output 21,223 amps
• Power Factor 0.85
• Excitation Voltage 550 VDC
• Hydrogen Gas Volume 120 m3

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Electrical Engineering Department
MAJOR COMPONENTS
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Electrical Engineering Department
Operation process

• The magnetic field produced by the stator poles
  induces a voltage in the rotor (or armature)
  coils when the generator is rotated.
• This induced voltage is represented by a voltage
  source.
• The stator coil has resistance, which is
  connected in series.
• The pole flux is produced by the DC
  excitation/field current, which is magnetically
  coupled to the rotor
• The field circuit has resistance and a source
• The voltage drop on the brushes represented by a
  battery

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Electrical Engineering Department
The induced voltage is connected to the generator
terminals through the commutator and brushes
Safety
1.size 2. circuit breaker 3. qualified
electrical contractor 4. NEVER store a generator
near a gas water heater or furnace 5.  NEVER fuel
an electric generator when the generator is
running 6. ALWAYS insure proper ventillation
7.remmember Many engine parts are very HOT
during operation
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Electrical Engineering Department
Performance Characteristics of Generators

• No-load characteristics
• 2. Terminal characteristic of a DC shunt generator

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Electrical Engineering Department
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