A novel fault ride-through strategy for wind turbines,based on permanent magnet synchronous generator,has been proposed.The proposed strategy analytically formulates the reference current signals,disregarding grid fau...A novel fault ride-through strategy for wind turbines,based on permanent magnet synchronous generator,has been proposed.The proposed strategy analytically formulates the reference current signals,disregarding grid fault type and utilizes the whole system capacity to inject the reactive current required by grid codes and deliver maximum possible active power to support grid frequency and avoid generation loss.All this has been reached by taking the grid-side converter’s phase current limit into account.The strategy is compatible with different countries’grid codes and prevents pulsating active power injection,in an unbalanced grid condition.Model predictive current controller is applied to handling rapid transients.During faults,the energy storage system maintains DC-link voltage,which causes voltage fluctuations to be eliminated,significantly.A fault ride-through strategy was proposed for PMSG-based wind turbines,neglecting fault characteristics,second,reaching maximum possible grid support in faulty grid conditions,while avoiding over-current and third,considerable reduction in energy storage system size and power rating.Inspiring simulations have been carried out through MATLAB/SIMULINK to validate the feasibility and competency of the proposed fault ride-through method and efficiency of the entire control system.展开更多
针对直驱式永磁同步风力发电系统风速多变、非线性和强扰动的问题,提出一种基于模糊控制和线性自抗干扰控制(Linear Active Disturbance Retection Control,LADRC)的混合控制方法。首先对线性自抗扰中的扩张状态观测器(Linear Extended ...针对直驱式永磁同步风力发电系统风速多变、非线性和强扰动的问题,提出一种基于模糊控制和线性自抗干扰控制(Linear Active Disturbance Retection Control,LADRC)的混合控制方法。首先对线性自抗扰中的扩张状态观测器(Linear Extended State Observer,LESO)进行改进,提高对扰动观测的能力,同时利用模糊控制动态调整LADRC控制参数,增强系统的抗干扰能力和鲁棒性。仿真结果表明,与传统PI控制器相比,该方法能够更好地估计风速引起的转矩波动,准确跟踪额定转速,实现风能利用最大化。展开更多
文摘A novel fault ride-through strategy for wind turbines,based on permanent magnet synchronous generator,has been proposed.The proposed strategy analytically formulates the reference current signals,disregarding grid fault type and utilizes the whole system capacity to inject the reactive current required by grid codes and deliver maximum possible active power to support grid frequency and avoid generation loss.All this has been reached by taking the grid-side converter’s phase current limit into account.The strategy is compatible with different countries’grid codes and prevents pulsating active power injection,in an unbalanced grid condition.Model predictive current controller is applied to handling rapid transients.During faults,the energy storage system maintains DC-link voltage,which causes voltage fluctuations to be eliminated,significantly.A fault ride-through strategy was proposed for PMSG-based wind turbines,neglecting fault characteristics,second,reaching maximum possible grid support in faulty grid conditions,while avoiding over-current and third,considerable reduction in energy storage system size and power rating.Inspiring simulations have been carried out through MATLAB/SIMULINK to validate the feasibility and competency of the proposed fault ride-through method and efficiency of the entire control system.
文摘针对直驱式永磁同步风力发电系统风速多变、非线性和强扰动的问题,提出一种基于模糊控制和线性自抗干扰控制(Linear Active Disturbance Retection Control,LADRC)的混合控制方法。首先对线性自抗扰中的扩张状态观测器(Linear Extended State Observer,LESO)进行改进,提高对扰动观测的能力,同时利用模糊控制动态调整LADRC控制参数,增强系统的抗干扰能力和鲁棒性。仿真结果表明,与传统PI控制器相比,该方法能够更好地估计风速引起的转矩波动,准确跟踪额定转速,实现风能利用最大化。
