Analysis of low voltage ride through control parameters for wind turbines based on trajectory sensitivity

Abstract

With the increase of wind power installed capacity, the impact of wind turbine integration on the safe and stable operation of the power system is becoming increasingly significant. Low voltage ride through capability is a necessary function for maintaining stability in new energy systems after faults. To identify the dominant control parameters of wind turbines during low voltage ride through periods, a dominant parameter analysis method based on trajectory sensitivity is proposed. Firstly, the control strategy of the wind turbine grid side converter during low voltage ride through period was introduced in detail, and the reactive power control parameters that affect the bus voltage were preliminarily screened. Then, trajectory sensitivity is used to extract dynamic features between parameters and transient voltage, and evaluation indicators are constructed to identify the dominant parameters of the system. Finally, a corresponding simulation model was built in PSCAD/EMTDC software to verify the correctness of the analysis in this paper.

Keywords

new energy / low voltage ride through / trajectory sensitivity / main parameters