Power System Controls and Stability Introduction

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Questions and Answers

What is the primary indication of the balance between generation and demand in a power system?

Frequency (correct)
Reactive power
Load current
Voltage level

What happens to the frequency when generation is greater than demand?

It remains constant
It increases (correct)
It becomes unstable
It decreases

What is the function of synchronous generators in terms of reactive power?

They always absorb reactive power
They have no effect on reactive power
They can generate or absorb reactive power depending on the excitation (correct)
They always supply reactive power

How do underground cables affect reactive power?

They generate reactive power under all operating conditions (C) Signup and view all the answers

What is the behavior of transformers in terms of reactive power?

They always absorb reactive power (D) Signup and view all the answers

What is the typical behavior of loads in terms of reactive power?

They always absorb reactive power (D) Signup and view all the answers

What is the primary role of a power system?

To supply affordable, green electricity in a secure and cost-effective manner (B) Signup and view all the answers

What is one of the key conditions for the stable operation of a power system?

Maintaining frequency and voltage within the required limits (A) Signup and view all the answers

What is the purpose of reactive power compensation devices?

To absorb reactive power in a desired manner (B) Signup and view all the answers

What is one of the aspects of reliability and quality of electricity supply?

Having a lack of interruptions (A) Signup and view all the answers

What is necessary for synchronous generators to remain in operation after a fault?

To withstand disturbances and recover to a new steady state (B) Signup and view all the answers

What is one of the key pieces of equipment in a power system?

Monitoring, Communications, Control and Protection equipment (C) Signup and view all the answers

What is the primary role of a power system?

To enable the generation of electricity in the most suitable locations and in sufficient quantity to satisfy the customers’ demand (D) Signup and view all the answers