Grid codes require wind turbines to have capability to withstand a certain grid voltage unbalance without tripping. However. existing controls for brushless doubly-fed induction generator (BDFIG) based wind turbine under grid unbalance have many problems such as difficulty in realizing decoupling control. involvement with flux or current estimations. https://www.roneverhart.com/AMS-Neve-1073SPX-Single-Preamp-and-EQ-p33827/