Method and wind farm controller as well as wind farm for storing measured values of a wind turbine or a wind farm

A wind farm controller, which is set up to implement a method for storing measured values of a wind turbine or a wind farm, the method comprising:

• a) recording several chronologically sequential measured values of a measured variable,
• b) acquiring a change between a previous measured value of the measured values and a chronologically subsequent measured value of the measured values,
• c) comparing the change with a threshold value, and either:
• d) storing the chronologically subsequent measured value in a computer-readable medium in a case where the change is greater than the threshold value, or
• e) discarding the chronologically subsequent measured value in a case where the change is less than the threshold value,
• wherein several measured variables are allocated to a group, wherein, in the case where a change in at least one of the measured variables of the group is acquired during the comparing in step c) that is greater than the threshold value allocated to the measured variable, step d) is performed for the at least one of the measured variables, and the previous measured value and/or subsequent measured value is stored, and
• wherein, in the case where a change in at least one of the measured variables of the group is acquired during the comparing in step c) that is greater than the threshold value allocated to the measured variable, step d) is performed for the at least one of the measured variables, and a last measured value of each additional measured variable of the group is stored.