Method for operating a wind turbine or a wind farm

Abstract

The invention relates to a method for operating a wind turbine, a wind farm, or the like and a power-to-gas unit electrically connected thereto. The wind turbine or the wind farm generates electrical power when there is adequate wind and feeds the electrical power into an electric network connected to the wind turbine or to the wind farm. Each wind turbine is operated with a predetermined power curve. Electrical power is generated by the wind turbine or the wind farm once a first wind velocity (start wind) is reached. The wind turbine or the wind farm is in partial-load operation as long as the wind velocity lies between the first wind velocity (start wind) and a second wind velocity (nominal wind). The wind turbine or the wind farm is in a nominal power range if the wind velocity lies in a range that is greater than the second wind velocity (nominal wind velocity). Electrical power generated by the wind turbine or the wind farm, preferably at least a predetermined part thereof, is consumed in the power-to-gas unit, such that a combustible gas, in particular hydrogen and / or methane gas or the like, is produced in the power-to-gas unit. The portion of the electrical power that the wind turbine or the wind farm generates in partial-load operation and that is not consumed in the power-to-gas unit is set nearly constant for a predetermined time period, for example 10 minutes or more, for example 1 hour.

Description

Background technique [0001] Wind power installations and power plants composed of a plurality of wind power installations have been known for a long time, and more precisely in different forms, embodiments, sizes and variants. [0002] Here, wind energy equipment is equipment that converts the energy present in the wind into electrical energy. In particular, the electrical energy is fed into the grid. [0003] A known disadvantage of wind energy is that the wind energy fluctuates with the wind, that is to say the electrical energy produced by the wind energy installation can fluctuate in relation to the current wind speed. However, this is strictly speaking only for the partial load range, that is, the range between the first wind speed (initial wind) and the second wind speed (rated wind) of the wind energy installation. If the wind power is greater than the rated wind speed, then fluctuations in the wind speed above the rated wind speed will not cause fluctuations in the generat...

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Problems solved by technology

[0007] However, this solution has the disadvantage that the wind energy yield of the wind turbine must then also be constantly and continuously recontrolled in the partial load range of the wind turbine, for example by tilting (adjusting) the rotor blades or by controlling a suitable generator balancing torque or corresponding other measures, which on the one hand consume additional energy for the operation of the wind energy installation and on the other hand continuously occupy the corresponding components, so that their aging and wear are accelerated

[0008] In particular, however, in this mode of operation, a valuable portion of the power is lost so that the entire wind power plant has only a relatively low efficiency

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