Enhanced sliding mode current control with extended state observer for power quality improvement in PMSG-based wind energy systems
摘要
An enhanced sliding mode current controller (ESMCC) for grid-connected permanent magnet synchronous generator (PMSG)-based wind turbines is proposed in this paper to improve the power quality. To achieve this, a sliding surface is introduced. Then, a modified exponential reaching law is proposed using an exponential term and a boundary layer function. Moreover, by utilizing the saturation function, chattering is significantly reduced. Additionally, an extended state observer is integrated into the proposed ESMCC, which enhances system stability. Furthermore, the proposed ESMCC is implemented on both machine side and grid side back-to-back converters to regulate the control inputs of