传统的太阳能系统经常会因为实际应用环境中的不匹配问题和光照不均现象而影响效率。分布式最大功率跟踪(distributed max power point tracking,DMPPT)概念的提出有效地抑制了这种影响。在分布式最大功率跟踪的基础上,该文提出一种嵌...传统的太阳能系统经常会因为实际应用环境中的不匹配问题和光照不均现象而影响效率。分布式最大功率跟踪(distributed max power point tracking,DMPPT)概念的提出有效地抑制了这种影响。在分布式最大功率跟踪的基础上,该文提出一种嵌入式智能光伏模块(sub-panel MPPT converter,SPMC),利用非隔离的DC-DC变换器替代传统太阳能板接线盒中的旁路二极管,通过输出侧统一的最大功率计算单元对输入侧进行的指令信号控制,可以有效地消除太阳能板因为不匹配问题所带来的能量损失。文中首先对所提出智能光伏模块的拓扑结构进行分析、比较。然后以BUCK型的嵌入式智能光伏模块提出统一输出最大功率跟踪控制策略,这种控制策略在保证输出功率最大化的前提下,优化了系统模块,有效降低了系统控制复杂度和装置成本。最后,文章通过实验验证了所提出的概念和控制方法。展开更多
Robust control design is presented for a general class of uncertain non-affine nonlinear systems. The design employs feedback linearization, coupled with two high-gain observers: the first to estimate the feedback lin...Robust control design is presented for a general class of uncertain non-affine nonlinear systems. The design employs feedback linearization, coupled with two high-gain observers: the first to estimate the feedback linearization error based on the full state information and the second to estimate the unmeasured states of the system when only the system output is available for feedback. All the signals in the closed loop are guaranteed to be uniformly ultimately bounded(UUB) and the output of the system is proven to converge to a small neighborhood of the origin. The proposed approach not only handles the difficulty in controlling non-affine nonlinear systems but also simplifies the stability analysis of the closed loop due to its linear control structure. Simulation results show the effectiveness of the approach.展开更多
文摘传统的太阳能系统经常会因为实际应用环境中的不匹配问题和光照不均现象而影响效率。分布式最大功率跟踪(distributed max power point tracking,DMPPT)概念的提出有效地抑制了这种影响。在分布式最大功率跟踪的基础上,该文提出一种嵌入式智能光伏模块(sub-panel MPPT converter,SPMC),利用非隔离的DC-DC变换器替代传统太阳能板接线盒中的旁路二极管,通过输出侧统一的最大功率计算单元对输入侧进行的指令信号控制,可以有效地消除太阳能板因为不匹配问题所带来的能量损失。文中首先对所提出智能光伏模块的拓扑结构进行分析、比较。然后以BUCK型的嵌入式智能光伏模块提出统一输出最大功率跟踪控制策略,这种控制策略在保证输出功率最大化的前提下,优化了系统模块,有效降低了系统控制复杂度和装置成本。最后,文章通过实验验证了所提出的概念和控制方法。
基金Project(60974047)supported by the National Natural Science Foundation of ChinaProject(S2012010008967)supported by the Natural Science Foundation of Guangdong Province,China+4 种基金Project supported by the Science Fund for Distinguished Young Scholars,ChinaProject supported by 2011 Zhujiang New Star Fund,ChinaProject(121061)supported by FOK Ying Tung Education Foundation of ChinaProject supported by the Ministry of Education for New Century Excellent Talent,ChinaProject(20124420130001)supported by the Doctoral Fund of Ministry of Education of China
文摘Robust control design is presented for a general class of uncertain non-affine nonlinear systems. The design employs feedback linearization, coupled with two high-gain observers: the first to estimate the feedback linearization error based on the full state information and the second to estimate the unmeasured states of the system when only the system output is available for feedback. All the signals in the closed loop are guaranteed to be uniformly ultimately bounded(UUB) and the output of the system is proven to converge to a small neighborhood of the origin. The proposed approach not only handles the difficulty in controlling non-affine nonlinear systems but also simplifies the stability analysis of the closed loop due to its linear control structure. Simulation results show the effectiveness of the approach.
