Grid forming H∞ control for HVDC diode rectifier-connected wind power plants

Grid forming controllers need to operate with a large variation of grid parameters and grid structure, for instance, during black-start operation, connection to HVDC diode rectifiers, etc. This paper proposes a methodology for the synthesis of robust grid forming controllers for HVDC Diode Rectifier based Wind Power Plants using H
∞
control. The different operating modes of a HVDC Diode Rectifier based Wind Power Plant are be considered for the controller synthesis using the proposed H
∞
controller design methodology. The proposed methodology for grid forming controller design improves the performance and robustness of well tuned standard proportional-resonant based controllers. The results have been validated experimentally at the wind turbine level by means of a small power prototype. The validation at the system level has been carried out using a realistic simulation of a HVDC Diode Rectifier-connected Wind Power Plant.