以液压型风力发电机组为研究对象,为使功率追踪的过程平稳,研究机组的最佳功率追踪控制方法.本文利用反馈线性化方法解决系统非线性问题,以液压系统压力为控制输出,设计最佳功率追踪控制器,并提出一种反馈线性化方法的工程应用解决方案...以液压型风力发电机组为研究对象,为使功率追踪的过程平稳,研究机组的最佳功率追踪控制方法.本文利用反馈线性化方法解决系统非线性问题,以液压系统压力为控制输出,设计最佳功率追踪控制器,并提出一种反馈线性化方法的工程应用解决方案,即结合传统PID控制解决反馈线性化工程应用中依赖模型参数精度的问题.依托30 k VA液压型风力发电机组半物理仿真实验台进行仿真和实验研究,验证了该方法的可行性,为机组进一步研究奠定理论与实验基础.展开更多
Making full use of wind power is one of the main purposes of the wind turbine generator control. Conventional hill climbing search （HCS） method can realize the maximum power point tracking （MPPT）. However, the ste...Making full use of wind power is one of the main purposes of the wind turbine generator control. Conventional hill climbing search （HCS） method can realize the maximum power point tracking （MPPT）. However, the step size of HCS method is constant so that it cannot consider both steady-state response and dynamic response. A fuzzy logical control （FLC） algorithm is proposed to solve this problem in this paper, which can track the maximum power point （MPP） quickly and smoothly. To evaluate MPPT algorithms, four performance indices are also proposed in this paper. They are the energy captured by wind turbine, the maximum power-point tracking time when wind speed changes slowly, the fluctuation magnitude of real power during steady state, and the energy captured by wind turbine when wind speed changes fast. Three cases are designed and simulated in MATLAB/Simulink respectively. The comparison of the three MPPT strategies concludes that the proposed fuzzy logical control algorithm is more superior to the conventional HCS algorithms.展开更多
在风力发电系统中,对于给定的风速达到最佳叶尖速比时,每条功率曲线均具有一个最大功率点(Maximum Power Point,MPP)。为了在不同的风速条件下均可产生最大的功率,必须对风力机的转速进行调节,以确保始终运行在最大功率点处。针对现有...在风力发电系统中,对于给定的风速达到最佳叶尖速比时,每条功率曲线均具有一个最大功率点(Maximum Power Point,MPP)。为了在不同的风速条件下均可产生最大的功率,必须对风力机的转速进行调节,以确保始终运行在最大功率点处。针对现有传统反馈控制的不足,提出了一种变步长最大功率跟踪策略,此方法可以根据输出功率变化的大小来改变扰动的步长值,克服了传统反馈控制成本高和固定步长的传统爬山算法稳定性、快速性难以兼顾的问题。同时采用定子电压定向控制,通过调节转子的励磁电流来调节定子发出的有功功率和无功功率。仿真实验结果证明了该方法的可行性。展开更多
文摘以液压型风力发电机组为研究对象,为使功率追踪的过程平稳,研究机组的最佳功率追踪控制方法.本文利用反馈线性化方法解决系统非线性问题,以液压系统压力为控制输出,设计最佳功率追踪控制器,并提出一种反馈线性化方法的工程应用解决方案,即结合传统PID控制解决反馈线性化工程应用中依赖模型参数精度的问题.依托30 k VA液压型风力发电机组半物理仿真实验台进行仿真和实验研究,验证了该方法的可行性,为机组进一步研究奠定理论与实验基础.
基金supported by the National High Technology Research and Development Program of China under Grant No.2011AA05S113Major State Basic Research Development Program under Grant No.2012CB215106+1 种基金Science and Technology Plan Program in Zhejiang Province under Grant No.2009C34013National Science and Technology Supporting Plan Project under Grant No.2009BAG12A09
文摘Making full use of wind power is one of the main purposes of the wind turbine generator control. Conventional hill climbing search （HCS） method can realize the maximum power point tracking （MPPT）. However, the step size of HCS method is constant so that it cannot consider both steady-state response and dynamic response. A fuzzy logical control （FLC） algorithm is proposed to solve this problem in this paper, which can track the maximum power point （MPP） quickly and smoothly. To evaluate MPPT algorithms, four performance indices are also proposed in this paper. They are the energy captured by wind turbine, the maximum power-point tracking time when wind speed changes slowly, the fluctuation magnitude of real power during steady state, and the energy captured by wind turbine when wind speed changes fast. Three cases are designed and simulated in MATLAB/Simulink respectively. The comparison of the three MPPT strategies concludes that the proposed fuzzy logical control algorithm is more superior to the conventional HCS algorithms.
文摘在风力发电系统中,对于给定的风速达到最佳叶尖速比时,每条功率曲线均具有一个最大功率点(Maximum Power Point,MPP)。为了在不同的风速条件下均可产生最大的功率,必须对风力机的转速进行调节,以确保始终运行在最大功率点处。针对现有传统反馈控制的不足,提出了一种变步长最大功率跟踪策略,此方法可以根据输出功率变化的大小来改变扰动的步长值,克服了传统反馈控制成本高和固定步长的传统爬山算法稳定性、快速性难以兼顾的问题。同时采用定子电压定向控制,通过调节转子的励磁电流来调节定子发出的有功功率和无功功率。仿真实验结果证明了该方法的可行性。
