Method for controlling the reactive power output of a wind farm and a corresponding wind farm

摘要

Process and wind farm for controlling a reactive power output of the wind farm. The reactive power output of the wind farm is regulated by the parkmaster on the basis of a specification regime. According to the invention, when the wind farm operates under normal grid conditions, it is provided to determine an actual reactive power capability, to check whether this is above an adjustable threshold value, if this is the case, then to output reactive power according to the default regime, if this is not the case, then switch over in a replacement regime, the replacement regime differs from the default regime in terms of reactive power output. Thus, at the parking level, depending on the available reactive power capability, it is possible to switch to an alternative (gentler) regime. Thus, an overload of the remaining (active) wind turbines can be effectively avoided. That makes the wind farm more robust. It is even possible to maintain a control reserve, so that additional reactive power can be delivered in the event of further voltage deviations. The network stability improves with it.