Electric Generator Done by Abdullah Al-Hulaimi ID# For Dr shwahdi 10 May 2005

1.INTRODUCTION

10 May 2005 BACKGROUND

10 May 2005 TYPES OF GENERATOS

AlQURRAH POWER PLANT GENERATORS

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

MAJOR COMPONENTS

Operation process The magnetic field produced by the stator poles induces a voltage in the rotor (or armature) coils when the generator is rotated. 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. This induced voltage is represented by a voltage source. The stator coil has resistance, which is connected in series. 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 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 field circuit has resistance and a source The voltage drop on the brushes represented by a battery The voltage drop on the brushes represented by a battery

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

Performance Characteristics of Generators 1.No-load characteristics 2. Terminal characteristic of a DC shunt generator

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