18 Questions
What is the typical voltage range of distribution feeders?
3.3-33 kV
What is the primary function of transformers in the power system?
To change the voltage and current levels of the power flow
What is the advantage of interconnection in terms of spare capacity?
It enables the sharing of spare capacity, resulting in reduced costs
What is the main factor that determines the capacity of power lines?
The current-carrying capacity of the conductor
What is the primary reason for having excess capacity in a power generation system?
To provide power in the event of a generator breakdown or maintenance outage
What is the merit order listing used for in power generation?
To determine the order in which generating stations are operated to achieve the cheapest electricity
Why is it necessary for spare generating capacity to operate as spinning reserve in steam-driven plants?
Because steam-driven plants cannot start up from cold quickly in an emergency
What is the relationship between the net installed capacity of each level and the distance from the consumer?
It increases as one moves towards the consumer
What is the optimal operating condition for generating plant to achieve cheaper electricity?
Operating large stations under optimum conditions and in the optimum configuration
What is the total capacity range of distribution feeders?
2-35 MW
What is the main disadvantage of thermal generating stations?
They are subject to the laws of thermodynamics, which limit their efficiency
What happens to voltage drop and power losses in power lines as the load increases?
They increase in direct proportion to the load
What is the main purpose of a transmission system in an electric power system?
To transport large amounts of power over long distances
What is the primary concern in power generation?
Achieving the lowest possible energy cost
What is the main component of an electric power system that delivers electrical energy from a transmission substation to customers?
Distribution
What is the typical voltage range for transmission lines in European countries?
300, 400, 500, and 750 kV
What is the function of a sub-transmission system?
To reduce the voltage for distribution
What is one of the main environmental issues associated with power generation?
All of the above
This quiz covers the importance of spare generating capacity in power plants, including steam-driven plants, and the need for interconnection to ensure reliable power supply during generator breakdowns or maintenance outages.
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