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Wind turbines in Sweden(near Onsala)
Magnus ThomassonOnsala Space Observatory
Sweden
Onsala Space Observatory
Onsala Space Observatory
• Wind turbines near Onsala Space Observatory in the past
• The present situation• Protection of research (law)• Legal matters• General plan for wind power in
Kungsbacka municipality
Content
Onsala Space Observatory
• Building permits handled by Kungsbacka municipality (“kommun”)
• Kungsbacka asks OSO• We check: will it cause RFI?• Kungsbacka follows our recommendation• No major problems
History: wind turbines and OSO
Onsala Space Observatory
Main concern: scattering• Line-of-sight?• Based partly on reports from
the Swedish military (radars)
Red+green areas: > 100 m is visible
Onsala Space Observatory
• Large interest in wind turbines– General public, politicians, entrepreneurs, ...
• Bigger structures• More money involved• More legal processes (appeals)• Problems for everyone
Now: wind turbines and OSO
Onsala Space Observatory
• Is OSO affected by wind turbines?
How much?• Does OSO have the legal right to
“complain” about wind turbines? Too far away (legally)?
• Case taken to the Supreme Administrative Court
Legal matters
Onsala Space Observatory
Law: Protection of research sensitive to disturbances (SFS 2006:449)
• Restricted access (decided by County Administrative Board in Halland)
• Other possibilities to protect too (but hardly in practice)
• No protection against wind turbines
Onsala Space Observatory
• Draft, no decision yet• Many aspects (incl. radio astronomy)• Suggestions for location of wind turbines:
– Not closer than 15 km from OSO– Not at sea– Not at the coast– Not in the “flat country”– Possible in the “inland” (eastern part of the area)– RFI should be taken into account– Generally positive to radio astronomy
General plan for wind power in Kungsbacka municipality
Onsala Space Observatory
• Use this procedure:– Determine incoming radiation (to the wind
turbine), intensities and frequencies– Primary emission given by manufacturer– Detailed calculation of RFI level at OSO
(A plan is very useful!)
OSOs respons to the draft plan
Onsala Space Observatory
• Clear rules, procedures• Better knowledge about RFI from wind
turbines• Better knowledge about RFI level in general
What do we need?