Method and wind park for feeding electric power into electric supply network

Abstract

The invention relates to a method for feeding electric power into an electric supply network by means of at least one wind park having a plurality of wind turbines, wherein the wind park feeds electric power into the electric supply network at a network connection point and an expected power (PF) is determined for a predetermined feed time period, wherein the expected power indicates a value of a power or a time curve of a power from which it is to be expected that said power is available from the at least one wind park in the predetermined feed time period as power from wind, in particular as a sum of all the rotor power of all the wind turbines of the wind park and / or as power that can be fed in from the wind park, and wherein, for the expected power, an expectation accuracy is determined which is a measure of how accurately the power reaches the expected power in the feed time period, and / or wherein, to determine the expected power (PF), at least one wind expectation variable (PMO) which is representative of the wind speed to be expected is determined with the aid of a weather forecast, and, proceeding from the weather forecast, the wind expectation variable is additionally determined or verified by means of a correction rule depending on local weather data and / or operating data of the wind park, wherein the expected power (PF) is determined on the basis of the wind expectation variable (PMO).

Description

technical field [0001] The invention relates to a method for feeding electrical power into an electrical supply network by means of at least one wind farm having a plurality of wind energy installations. The invention also relates to a corresponding wind farm. Background technique [0002] Methods for feeding electrical power into a power grid by means of a wind park combining a plurality of wind energy installations are generally known. In addition to pure power infeed for consumer supply, such wind farms are also increasingly faced with tasks in the field of grid system services and or contain support tasks up to grid reconstruction or even up to preparation or implementation The so-called black boot. These tasks are partly difficult for wind farms, especially since their primary energy, the wind, not only fluctuates strongly, but is also unpredictable. [0003] What is particularly problematic here is that conventional weather forecasts, although relatively accurate an...

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Problems solved by technology

[0004] On the other hand, it is possible for a wind park or even regionally for a wind park to produce a locally resolved local weather forecast, which however has a low precision for this purpose.

[0005] There is therefore still the fundamental problem that the predictability of the wind speed and thus the power of the wind farm is very imprecise

This makes it difficult to plan the possible power feeds

This can be problematic especially for grid rebuilds or even black starts when this requires a power profile which is to be fed in but which cannot be realized or can only be realized only insufficiently, possibly due to wind disturbances

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