Wind farms in the North Sea supplied significantly less electricity in the first half of the year than in the same period last year due to weather conditions. However, because periods of calm put even more prere on onshore wind power output, the share of North Sea power in total German wind power generation rose to 16.6 percent in the period from January to June (previous year: 15.6 percent), according to grid operator Tennet in Bayreuth, Germany.
Offshore expansion important
For Tennet CEO Tim Meyerjurgens, this development proves how necessary an expansion of offshore wind energy is for the security of supply and a successful energy transition. "Especially in lower wind years, the ratio of wind power generated shifts toward offshore", he said. "There, we generate on average about twice as many full-load hours as onshore and can thus partially compensate for lulls onshore."
Overall, wind power transmitted by Tennet from the German North Sea fell 16 percent in the first half of the year to 9.67 terawatt hours (TWh). 1.81 TWh came from wind turbines in the Baltic Sea, which are not part of Tennet’s grid area, 17.5 percent less than a year earlier. Germany’s total offshore wind output in the North Sea and Baltic Sea was thus around 11.5 TWh in the first half of 2021.