Broadband oscillation suppression method and apparatus for wind-storage combination

A broadband oscillation suppression apparatus for a wind-storage station system comprising a wind turbine and an energy storage apparatus, wherein the broadband oscillation suppression apparatus comprises:

• an acquisition module configured for acquiring an operation state quantity of a wind-storage station system at a first moment;
• a first determination module configured for inputting a first set of control variables at the first moment and the operation state quantity at the first moment into a prediction model that comprises a phase-locked loop-model that predicts wind turbine frequency, so as to determine two wind turbine frequencies at a second moment, and operation state quantities at the second moment and a second set of control variables at the first moment respectively corresponding to the two wind turbine frequencies, wherein the second moment occurs after the first moment, the two wind turbine frequencies at the second moment are frequencies with minimum and second minimum values resulting from a value function of the prediction model, and the value function is based on a variable of the two wind turbine frequencies and a loss of the energy storage apparatus;
• a second determination module configured for respectively inputting the second set of control variables at the second moment and the two operation state quantities at the second moment into the prediction model, so as to obtain wind turbine frequencies at a third moment respectively corresponding to the two operation state quantities, wherein the two wind turbine frequencies at the third moment minimize the values of the value function of corresponding operation state quantities, and the third moment occurs after the second moment;
• a third determination module configured for determining a control variable from the first set of control variables at the first moment corresponding to one of the two wind turbine frequencies that minimize the value of the value function at the third moment as a final control variable;
• and
• a control module configured for controlling the wind turbine and the energy storage apparatus based on the final control variable.