Applicability Analysis of Single-Machine Equivalent Method for Modeling Wind Farm Containing Full-Converter Wind Turbine Generators with PMSG

For the analysis of the applicability of single machine equivalent method for modeling wind farm containing full-converter wind turbine generators(WTG) with permanent magnet synchronous generator(PMSG), at frist, single-machine equivalent methods of equivalent model are provided, then the detailed and equivalent wind farm model is built on simulation software DIgSILENT/Power Factory platform. At last, for wind speed fluctuations and grid disturbance, the applicability of single-machine equivalent method is analyzed by comparing dynamic response at point of interconnection between equivalent model and the detailed model of wind farms. Results show that this method is suitable for the dynamic equivalent modeling of wind farm containing directly driven wind turbine with PMSG in certain situations.