1. Integration of wind and solar in
Lillgrund offshore wind farm
Samer Al-Mimar
02/06/2015
2. - Facts about Lillgrund:
48 offshore wind turbines
Power: 2.3 MW / wind turbine
110 MW of installed power
Annual production of about 330 GWh, which provides electricity to more than
60,000 homes
Distance to the Swedish coast, about 7 km south of the Öresund Bridge
Wind turbines total height of about 115 meters up to the wing tip
The rotor diameter of 93 meters
Wind speed 6-16 rpm per minute
Investment cost around 1.8 billion
5. Infrastructure and cables ready to be used when the wind
turbine productions are less in summer time and solar radiation
is high.
1 2 3 4 5 6 7 8 9 10 11 12
Wind Production KW 31567 18811 33771 25136 23891 24274 13193 17957 19595 30014 32370 42239
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
Wind Production KW
6. Lillgrund farm could produce power from other sources (Solar
and Wave) to improve the production and reduce the
influence of power production from wind farm.
12. Special requirement at lillgrund
Frameless panels.
High-density polyethylene structure.
Solid base between turbines stand over concrete pillar.
The suggested types of foundation are:
• Floating base made of polyethylene.
• Concrete base with fixed foundation.
• Floating base with damper on edges to slow down the
foundation vibration.
Solar inverters to be installed next to wind turbines.
All materials shall comply with environment condition and
requirements.
13. Shade effects on solar array:
Soft shade
• The current drops proportionally to the reduced irradiance.
• Voltage would be the same as long as there is enough light
(~50W/m2).
• The temperature and the electron band gap control the
voltage of the PV cell.
Hard shade
• If the cell fully shaded then no current will move out of the
cell, and the voltage will breakdown.
16. Calculation method:
The effect of shadow from wind turbine on
solar panels
Solar panel and solar inverter:
Solar panel: E19/320, with a total panel conversion efficiency of
19.6 %.
Solar Inverter: (SINVERT 2000 MS TL) with efficiency ˃ 98% and
1000V system voltage
Simulation program: (PV SYST).
Project location: The site location Latitude / 55, 22 and longitude
12, 21.
The solar simulation variant dates: between 01/01/1990 until
31/12/1990.
The wind power production: avarage of years (2011/2012/2013)
20. Integrated solar & wind power.
Month Wind 3 yrs. Avg Mw/h Solar El-Grid Mw/h Total Mw/h
Jan 31488.7 4062.7 35551.4
Feb 31123 8333.8 39456.8
Mar 31302.7 15621.8 46924.5
Apr 16819.7 26582.5 43402.2
May 23950 33654.9 57604.9
Jun 21609.7 31976.7 53586.4
Jul 17790 34224.6 52014.6
Aug 18043 28954.12 46997.12
Sep 27400 18606.34 46006.34
Oct 32978.3 10845.34 43823.64
Nov 29287.7 5040.8 34328.5
Dec 42979.7 2695.5 45675.2
Total 324772.5 220599.1 Mw/h
21. Integrated solar & wind power.
0
10000
20000
30000
40000
50000
60000
70000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
WindAveg Mw/h
El-Grid Mw/h
Total Mw/h
24. Results and conclusions:
1. Increase the stability of power production during summer time and other
fluctuations.
2. Increasing the total produced power around the year.
3. Utilize the investment in power transmission components to carry higher
energy productions with minimum extra costs.
4. Increase the wind farm life and lower the maintenance cost when shutdown
the wind turbine during the summer time.
5. The near shading factor for 0 ֯tilt solar panel systems are less than 30 ֯tilt
solar panel system Because the massive solar cells area.
6. The total produced power from wind farm is 324,773 Mw/h per year and
from solar farm is 220,599 Mw/h at 30 ֯ tilt per year and totally provide
545,372 Mw/h (545,372 Gw/h) per year.
