METHOD FOR OPERATING A WIND POWER PLANT HAVING A DOUBLY-FED ASYNCHRONOUS MACHINE AND WIND POWER PLANT HAVING A DOUBLY-FED ASYNCHRONOUS MACHINE

摘要

Method for operating a wind power plant having a doubly-fed asynchronous machine, which has a mains-side inverter and a generator-side inverter, which are activated using a controller, the method having the following steps: in normal operation, the inverters are activated by the controller via guide variables for normal operation, in a fault event of the mains, the inverters are activated by at least one control module, which controls (i) the torque and/or the active power and (ii) the idle current and/or the idle power via guide variables such that a disconnection of the asynchronous machine from the mains only occurs if the mains voltage falls below a predetermined voltage/time characteristic line, wherein the curve of set voltage/time characteristic line is fixed by multiple preselectable parameters in the at least one control module, wherein at least one first guide variable function is provided, which predetermines a guide variable for the torque and/or the active power in a fault event, and which has at least two main functions, of which a first main function determines the target value for the torque and/or the active power after the fault event begins and a second main function determines the target value for the torque and/or the active power after the fault event ends, and at least one second guide variable function is provided for the idle current and/or the idle power, which predetermines a guide variable for the activation of at least one inverter in the fault event, which has at least two main functions, of which a third main function determines the target value for the idle power and/or the idle current after the fault begins and a fourth main function determines the target value for the idle power and/or the idle current after the fault event ends.