Methods are provided of operating first and second wind turbines in a situation wherein presence of the first wind turbine affects the wind so that a wake is generated that affects the second wind turbine. These methods include determining parameters of the wind at first wind turbine and at second wind turbine. These methods further include determining a value of a parameter of a previously determined wake model to determine a current wake model. This value is determined based on the parameters of the wind at first wind turbine and at second wind turbine. These methods still further include optimizing the operation of the first and second wind turbines based on the current wake model. Control systems are also provided which are suitable for performing any of the methods of operating wind turbines. Wind farms are also provided including any of the control systems.