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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. More than 94 TWh electrical energy produced from on-shore wind farms was fed-in into Germaný's power grid in 2018. When compared to the previous year, the good wind conditions of 2018 and the high wind power expansion contributed to 5 percent more electricity to be fed into the grid from wind energy than in the pprevious year. The strongest wind in 2018 was recorded in January, with an energy yield of 13,2 TWh. Compared to 2017, the strongest wind occured in December with 13,3 TWh. Due to the high expansion of wind power installations and the significant wind energy conditions, the wind energy yield of 2018 has exceeded the record values of the previous years [UeNB].






Projection of onshore wind power feed-in 2018 compared to the same months the previous year
Data sources: [UeNB]; [UeNB onshore 2018]; [UeNB onshore 2017]



The figure illustrates the wind power feed-in according to the extrapolation data from the North and Baltic Seas in 2018, compared with the months of the previous year. In 2018 an energy yield of 20,6 TWh was fed into the grid, representing an increase of 13 percent over 2017. In December 2018, almost 2,7 TWh were fed into the grid, which accounted for more than 13 percent of the total electricity delivered from wind energy. In 2017, the month with the highest share of electricity that was fed into the grid from wind energy was the October, with a share of 13 percent or 2,4 TWh. The seasonal variations, both on- and off-shore can easily be noticed, with the energy yield in the period from April to September always staying below the annual average.




Projection of wind power feed-in 2018 from the North and Baltic Seas compared to the same months the previous year
Data sources: [UeNB]; [UeNB offshore]