Efficiency and Reliability Improvement in Wind Turbine Converters by Grid Converter Adaptive Control

摘要

This paper presents a control method that reduces the losses in wind turbine converters adaptively controlling the grid converter. The dc-link voltage adapts its reference based on the system state and therefore reduces the stored energy;; and is therefore kept at the minimum necessary for the grid and generator side. Operating in this way;; the electrical and thermal stress factors are decreased on the power electronic devices;; increasing their lifetime. The simulation results using this method show efficiency increase and devices temperature cycles slightly decreased. Experimental results on a wind turbine power stack shows efficiency increase in the high power region.