L11 - Renewables 2: Wind power, hydropower and grid integration of intermittent renewables

Question 1

What three technologies for hydropower exist?

Answer 1

•Run-of-river
-Produce electricity from the water flowing freely in the river.

•Storage/reservoir
-Take water from dams when production is desired.

•Pumped storage
-Dams up stream and down stream. Use turbine as pump.

Question 2

What environmental impacts are caused by hydroelectric dams?

Answer 2

A dam and reservoir can also change natural water temperatures, water chemistry, river flow characteristics, and silt loads. All of these changes can affect the ecology and the physical characteristics of the river. These changes may have negative effects on native plants and on animals in and around the river.

Question 3

Which countries dominate the share of wind power worldwide?

Answer 3

China – 288.32 GW. ...
United States – 122.32 GW.
Germany – 62.85 GW. ...
India – 38.63 GW. ...
Spain – 27.24 GW.

Question 4

What is the wind farm power curve?

Answer 4

Bildresultat för What is the wind farm power curve?
The power curve of a wind turbine is a graph that indicates how large the electrical power output will be for the turbine at different wind speeds.

Question 5

How does offshore wind work? Pros and cons compared to onshore wind power?

Answer 5

Built on sea floor with different “anchoring” principles (depending on depth), floating on its way

• larger turbines possible •(much) better capacity factor than onshore, but still …•currently more expensive (+ 50 –100%)
• issues: construction methods, corrosion (especially gearbox), storm resistance, remote monitoring, service & maintenance
• Grid integration

Question 6

What is DSM?

Answer 6

Demand Side Management