Method for judging tripping of outgoing line of double-feed wind turbine generator

The invention relates to a method for judging tripping of an outgoing line of a double-feed wind turbine generator. The method is characterized by comprising the following steps of: 1, firstly detecting current and active power of the outgoing line of a wind power plant, judging whether meeting current variation starting condition or active power variation starting condition, and if yes, judging that the outgoing line of the wind power plant is disturbed, entering a step 2 for judgment, recording a starting moment, and storing several generator operation state information, such as voltage, current and active power of the outgoing line of the wind power plant before starting, otherwise, judging that the outgoing line of the wind power plant is not disturbed, and ending continuous judgment; 2, judging whether the active power before starting is more than a set value PS1. According to the method provided by the invention, the problem that tripping criterion of the outgoing line of the wind power plant may cause misjudgment when Crowbar protection movement of the generator exists under some operation modes of the wind power plant is overcome, and electrical capacity disturbance processes, such as tripping of the outgoing line, Crowbar protection movement and the like, can be quickly identified.