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Wind power feed-in levels


The amount of energy generated by wind turbines naturally fluctuates with the available wind and not with load distribution like conventional energy generation. The four German TSOs use a special forecasting system, which calculates the current wind power feed-in using a relatively small number of reference measuring points. These measuring points are selected wind farms or substations with a high proportion of wind energy. The final yield figures are only available with the annual EEG accounts published in the summer of the following year.


The following figure shows the monthly onshore wind power feed-in and illustrates the seasonal dependence as well as the building of new wind turbines. In 2017, over 89.9 TWh [Hochrechnungsdaten Onshore] of onshore wind power was fed into the German grid. Compared with the previous year and despite further expansion, this corresponds to almost 31 percent more feed-in [Jahresabrechnung UeNB]. The month with the strongest wind in 2017 was December, with 13.3 TWh, whereas in 2016 it was Februar, with 9.3 TWh. So in 2017 the records of previous years were exceeded, achieving above average high yields.






Projection of onshore wind power feed-in 2017 compared to the same months the previous year
Data sources: [UeNB offshore][UeNB onshore]



The figure illustrates the wind power feed-in according to the extrapolation data from the North and Baltic Seas in 2017, compared with the months of the previous year. In 2017 an energy yield of 18.2 TWh was fed into the grid, representing an increase of 52 percent over 2016. 

Over 11.6 percent of the year’s feed-in was achieved in January 2016, with almost 1.3 TWh. The most productive month in 2017 was October, with 2.4 TWh, which was 13 perc ent of the year’s feed-in. The seasonal difference can be clearly seen for both onshore and offshore. Significantly less wind power was fed into the grid between April and September than in the other months.




Projection of wind power feed-in 2017 from the North and Baltic Seas compared to the same months the previous year
Data sources: [Hochrechnung TenneT TSO][Archiv Windenergie]