QHTGMc-E2PLL辅助的平滑无扰同步控制在PCC处快速功率波动下的风力驱动DFIG-BES-SPVS系统中的应用

Standalone wind and solar energy-driven remote systems face high power fluctuations at point of common coupling (PCC) due to inherent intermittency of renewable sources. These power variations manifest as phase angle and amplitude fluctuations in PCC voltages, which in turn delay synchronization of incoming electromechanical energy conversion systems with higher inertia. Additionally, due to coupling between voltage parameter, estimation loops within phase-locked loops (PLLs) used for synchronization, disturbances in one parameter propagate to others, further complicating control. To address these challenges, this work proposes a novel disturbance-immune synchronization control strategy based on a quaternion hyperbolic tangent Geman–McClure adaptive filter-augmented extended enhanced phase-locked loop (QHTGMc-E2PLL). Approach is implemented in a standalone hybrid system consisting of a wind turbine-driven doubly fed induction generator (DFIG), a battery energy storage system (BES), and a solar photovoltaic array-driven system (SPVS). Proposed QHTGMc-E2PLL framework ensures smooth and rapid synchronization even under severe voltage disturbances at the PCC, enabling robust integration of slower electromechanical systems without risk of false disconnections during dynamic transitions. Furthermore, control scheme enhances system power quality under nonlinear loading conditions and aligns with the IEEE 1547-2018 standard. It also maximizes power transfer efficiency by enforcing unity power factor operation of DFIG stator, thereby reducing line copper losses. Effectiveness of proposed method in achieving disturbance-free rapid synchronization with seamless mode transitions is validated through both detailed simulation and hardware results, with performance comparisons confirming its superiority over existing state-of-the-art control strategies.