Deck 13: Alternative Power Sources

Question 1

Small alternate sources of electric power are often used to reduce the demand on the power grid that is normally supplied from utility power stations.

Answer 1

True

Question 2

What connections are permitted with separately derived systems?

Answer 2

The only connections that are permitted are the connections through the earth, metal enclosures, metal raceways, or equipment grounding conductors.

Question 3

What are the drawbacks of the workhorses of commercial generation, such as coal and nuclear power?

Answer 3

With the workhorses of commercial generation--such as coal and nuclear power--the drawbacks include procurement, transportation, storage, and waste.

Question 4

If the generators are asynchronous, then the control mode may be ____________________ mode, variable slip mode, or variable slip with DFIG mode.

Question 5

With direct drive and variable speed, the wind turns the turbine, which spins the generator, or a speed converter gearbox is used to produce sync speed.

Question 6

Small wind turbine systems are covered in NEC Article 496.

Question 7

Separately derived systems constitute alternative energy.

Question 8

Wind-generation "____________________" have many towers lined up like "crops" to harvest the wind.

Question 9

____________________ generate electrical power through a chemical reaction.

Question 10

What is much of the treatment of the separately derived system is concentrated in?

Question 11

____________________ generators are becoming increasingly popular for sources of power with no direct charge for the source of energy.

Question 12

What happens with a wind generator when the wind speed is below the minimum operating speed?

Question 13

HTS superconductors may lead to larger and more effective use of ____________________ wind-generation systems.

Question 14

What occurs with a spinning flywheel when there is a line disturbance or a power failure?

Question 15

All regions in the United States have significant wind power available on a consistent basis, which makes them good candidates for wind-powered generation.