The increasing penetration of wind power in the grid has driven the integration of wind farms with power systems that are series-compensated to enhance power transfer capability and dynamic stability. This may lead to sub-synchronous control interaction (SSCI) problems in series-compensated doubly-fed induction generator (DFIG)-based wind farms. To mitigate SSCI. nonlinear controllers... https://www.ealisboa.com/great-deal-Pentair-Union-Collar-2-U11-200PS-super-offer/