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Research of ASW‑FCM‑Based Algorithm for Clustered Wind Turbine Group Equivalent Modeling
Mudan Li,Yinsong Wang,Qunli Sun,Yanyan Liu 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4
A new dynamic equivalent modeling method for a wind farm composed of direct-drive wind turbines is proposed. Firstly, the efective input wind speed is calculated considering the wake efect and wind direction change between wind turbines, the operating characteristics is analyzed, the efective wind speed, rotor speed, pitch angle and output power that refect the wind turbine operating characteristics are selected as the multi-grouping indicators. Secondly, an adaptive sample weighting fuzzy C-means clustering algorithm (ASW-FCM) considering the diferences and correlations among turbines operating conditions is designed to cluster the wind farm optimally. Then the equivalent model of the clustered wind turbine group is established based on the principle that the output characteristics before and after the equivalence are equal. Finally, an actual wind farm system is used as an example for modeling and simulation to verify the rationality and accuracy of the equivalent modeling method.
Mudan Li,Yinsong Wang 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.6
A new frequency coordinated control strategy based on the variable de-loading level for a D-PMSG wind turbine is proposed. First, the D-PMSG wind turbine model and control system model are established. Second, the de-loading control principle of the D-PMSG wind turbine is described, the variable de-loading level control strategy is analyzed according to diff erent wind speeds and additional inertial control is introduced. Then the frequency coordinated control strategy combining variable de-loading level control and additional inertial control is designed for diff erent power reserve areas. Finally, a D-PMSG grid-connected simulation system is built to verify the rationality and accuracy of the frequency coordinated control strategy.