A study on the characteristics of transient active power output in a doubly-fed wind field

The transient behavior of active power in a doubly-fed wind field after symmetrical fault during fault crossing is studied. Firstly, by analyzing the mathematical model of doubly-fed fan, the stand-alone short-circuit current is derived during fault ride-through, considering phase angle jump and phase-locked loop. Then, using the network structure of the wind farm, the interaction and acting factors of the active power of multi-wind turbines are analyzed, and the interaction law between wind turbines in the transient process is explored. Finally, the correctness of the analysis results is verified on the matlab/simulink platform, and the reactive power transient characteristics of the wind farm during fault crossing are accurately described, which provides a theoretical basis for the research and application of the transient characteristics and active output of the large-scale doubly-fed wind field composed of multi- machine parallel connection.