Inertia compensation stabilization strategy of wind turbine simulator considering system variable delay

The wind turbine simulation system serves as a crucial experimental and testing tool for the study of wind power generation technology. An inertia compensation stabilization strategy suitable for variable communication delays is proposed in this paper to address the oscillatory instability caused by variable communication delays in the wind turbine simulation system. The strategy is based on the current model of the wind turbine simulation system, which considers fixed communication delays. This method improves the original high-order filter structure, ensuring the stability of the wind turbine simulation system within a certain range of delay deviations. Firstly, the paper derives the analytical expression for the stability conditions of the system under variable communication delays based on the wind turbine simulation system model. Subsequently, a zero-pole placement method is employed to design the inertia compensation stabilization strategy suitable for variable communication delays. The stability of the wind turbine simulation system is analyzed from both the transfer function and time-domain response perspectives. Finally, a comparative analysis of the simulation effects between the existing strategy and the proposed strategy is conducted through experiments on a 15 kW wind turbine simulation system. The results demonstrate that the proposed strategy effectively suppresses the instability of the wind turbine simulation system under different delay deviation multiples, maintaining system stability and achieving favorable simulation outcomes under variable communication delays.