Active Power Dispatch and Tracking Mechanism for DFIG Wind Turbine Generator in Wind Farm Considering Wake Effect

Abstract

For participation in the active power regulation, wind farm controller modifies the control mechanism of the wind turbine generators (WTG). For active power control, the wind farm controller mainly depends on effective power dispatch selection command and tracking schemes for each WTG on which wake effect has a high impact. The authors present a novel active power dispatch mechanism (APDM) and power reference tracking mechanism (PRTM) considering the wake effect. The APDM decides the power setpoint reference for each WTG by taking wind power forecasted data and scheduled power dispatch command as inputs. APDM also includes the influence of the wake effect, which considerably affects the dispatch command of different WTG based on their position in wind farm and ensures minimum pitch angle variation and maximized rotational kinetic energy in rotor perpetually. The PRTM avails the command from APDM and operates the rotor angle control and pitch angle control to track the reference power command. Case studies at different wind speed zones are showcased to demonstrate the algorithm’s effectiveness that lessens pitch variation and increases the rotor margin than the conventional techniques. The simulations, performed in the real-time environment, depict the fulfillment of the above objective efficiently compared with other conventional approaches.