Study on Fault Response Characteristics Classification and Discriminant Method of PMSG Considering Initial Wind Speed and Drop Degree of Terminal Fault Steady-state Voltage
Security analysis of power systems often requires simulation of various expected scenarios.With massive integration of wind power,it is important to put forward an equivalent modeling method suitable for the anticipated fault for wind farms.Meanwhile,grouping wind turbines by their dynamic response characteristics is the basis of equivalent modeling.The dynamic response characteristics of each wind turbine after a fault are not only affected by the control mode,but also by the operating wind speed and the severity of the fault.In general,the control of wind turbines can work rapidly and run to fault steady state during the fault.For the above reasons,this paper proposes a classification and discrimination method for the fault response characteristics of wind turbines considering the initial wind speed and terminal fault steady-state voltage drop degree.First,for the control strategy of reactive power priority control during fault process and active power ramp recovery during fault recovery,all possible characteristics of wind turbines and the critical condition of all clusters can be found.Then,based on the anticipated fault,a fault steady-state voltage calculation method for each wind turbine in a wind farm is proposed.Further,a clustering method adapted to anticipated fault is proposed.Finally,the simulation analysis of a detailed wind farm model proves the correctness of the proposed method.
direct-driven permanent magnet synchronous generatoractive power responseramp recoveryanticipated faultclustering method
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