摘要
为提高液压型风力发电机组的电网适应性和低电压穿越能力,针对机组低电压穿越过程中的能量调控问题,提出一种基于分层控制思想的低电压穿越控制方法,即设计出基于风力机调桨控制的顶层控制、基于变量马达摆角控制的中层控制和基于节流阀开度控制的底层控制。为实现机组在控制过程中多变量的协调控制,以风力机弃风最小、惯性储能最大和节流阀能耗最小为优化目标,采用二次规划算法对多目标控制律进行规划,得到了最优控制律。通过AMESim和MATLAB/Simulink软件对多目标控制策略进行仿真分析,利用液压型风力发电机组半物理试验平台对控制律进行了验证。结果表明,所提出的控制方法可以有效降低机组在低电压穿越过程中的剩余能量,降低对发电机的冲击,提高机组的适应性。
In order to improve the adaptability of the power grid and the low voltage ride through ability of the hydraulic wind turbine, a new method was proposed based on the hierarchical control. The top level control based on wind turbine pitch control, the middle level control based on variable motor swing angle and the bottom level control based on throttle valve were proposed, and the control laws were designed. In order to achieve multi-variable coordinated control of the hydraulic wind turbine, the optimization goal is to minimize the energy consumption of the wind turbine and the throttle valve, maximum the inertia energy of the wind turbine, the linear quadratic regulator algorithm is applied to plan the multi-objective control law. The simulation analysis is carried out by AMESim and MATLAB/Simulink software, and the control law is verified by the semi physical experiment platform of the hydraulic wind turbine. The results show that the proposed control method can effectively reduce the residual energy of wind turbine in the process of LVRT, reduce the impact to generator and improve the adaptability of hydraulic wind turbine.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2018年第20期96-105,共10页
Journal of Mechanical Engineering
基金
国家自然科学基金(51775476,51475406)
河北省高等学校科学技术研究重点项目(2D2016114)资助项目
关键词
风力发电
液压传动
分层控制
低电压穿越
wind power generation
hydraulic transmission
hierarchical control
LVRT
