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Excitation System: Static Excitation of an Alternator Quiz

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Excitation System: Static Excitation of an Alternator Quiz

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Questions and Answers

What is the basic function of an excitation system in a generator?

Step down the generator voltage

Provide AC power to the field winding

Control the speed of the generator

Supply DC power to the field winding (correct)

Which type of excitation system uses a rotating rectifier?

Power Electronic System

Static Excitation System

Brushless Excitation System (correct)

Internal Free Control System

What is the advantage of Static Excitation over Brushless Excitation?

Rotating rectifier used for power supply

Higher control speed

Use of fully controlled thyristor Bridges

Stationary Stator and Rectifier (correct)

How is the AC power fed to the field of the main generator in a Static Excitation System?

By tapping off from the generator terminal (B) Signup and view all the answers

What is the function of the excitation transformer in the static excitation system?

Combines voltage and current sources to provide three-phase AC output (A) Signup and view all the answers

What provides additional field excitation during system faults in the excitation transformer system?

Current source from the generator neutral leads (B) Signup and view all the answers

What is the role of the rectifier in the excitation system?

Provides a means for DC field voltage regulation (D) Signup and view all the answers

How does the voltage regulator control the generator terminal voltage?

Through control of SCR trigger circuits in rectifier bridges (D) Signup and view all the answers

Where is the generator field collector and brush-holder rigging assembly located?

Alongside the generator in a small housing (A) Signup and view all the answers

What differentiates Brushless excitation systems from static excitation systems?

Presence of rotating exciter machines (B) Signup and view all the answers