Sensorless control of a power converter for a cluster of small wind turbines
Rights accessOpen Access
This study presents a new sensorless control for small wind turbine clusters with a single power converter with a direct torque control algorithm. The proposed system consists of a wind farm connected to a back-to-back power converter that interfaces the wind farm with the AC grid. The studied wind turbines are based on fixed-speed wind turbines equipped with squirrel cage induction generators with individual pitch control. The presented structure permits to reduce the number of converters and allows to accomplish the grid codes (fault ride through capability and reactive power support). Furthermore, the generated active power can be reduced according to grid operator requirements. The presented control scheme can be applied to wind turbine repowering projects, wind farms connected to a microgrid, even, new small onshore and offshore power plants. The system performance and stability is studied and validated by means of dynamic simulations.
CitationEgea, A., Araguees, M., Gomis-Bellmunt, O., Rull, J., Sudria, A. Sensorless control of a power converter for a cluster of small wind turbines. "IET renewable power generation", 1 Maig 2016, vol. 10, núm. 5, p. 721-728.