REP Wind Power Technologies 5

Question 1

What is the primary environmental concern unique to offshore wind development compared to onshore?

Accepted Answer

Impact on marine ecosystems, shipping lanes, and fisheries

Answer

Offshore wind projects must carefully assess impacts on marine habitats, fish populations, shipping navigation, and commercial fishing operations not present in onshore siting.

Question 2

Which federal agency has primary jurisdiction over offshore wind leasing in U.S. federal waters?

Accepted Answer

Bureau of Ocean Energy Management (BOEM)

Answer

BOEM manages the leasing of the Outer Continental Shelf for offshore wind development, issuing leases, approving construction and operations plans, and overseeing environmental reviews.

Question 3

What is 'vortex-induced vibration' (VIV) a concern for in wind energy structures?

Accepted Answer

Oscillations in slender structures like towers caused by periodic shedding of wind vortices

Answer

VIV occurs when wind vortices shed alternately from a cylindrical structure at a frequency matching the structure's natural frequency, causing potentially destructive oscillations.

Question 4

In a doubly-fed induction generator (DFIG) wind turbine, what does the 'doubly-fed' refer to?

Accepted Answer

Electrical power fed to both the stator and rotor windings

Answer

In a DFIG, electrical power is exchanged through both the stator (directly to grid) and the rotor (through a back-to-back power converter), enabling variable-speed operation.

Question 5

What is the primary purpose of a wind farm's collector system?

Accepted Answer

Aggregate power from individual turbines and step up voltage for transmission

Answer

The collector system consists of underground or submarine cables and a substation that aggregate each turbine's output and step up voltage for efficient transmission to the grid.

(REP) Certified Renewable Energy Professional Practice Test

(REP) Certified Renewable Energy Professional Practice Test

REP Wind Power Technologies 5