This paper presents a new algorithm for optimization problems with nonlinear inequality constricts. At each iteration, the algorithm generates the search direction by solving only one quadratic programming (QP), and ...This paper presents a new algorithm for optimization problems with nonlinear inequality constricts. At each iteration, the algorithm generates the search direction by solving only one quadratic programming (QP), and then making a simple correction for the solution of the QP, moreover this new algorithm needn’t to do searching. The other advantage is that it may not only choose any point in En as a starting point, but also escape from the complex penalty function and diameter. moreover the iteration point will be a feasible descent sequence whenever some iteration point gets into the feasible region. So we call it subfeasible method.Under mild assumptions,the new algorithm is shown to possess global and two step superlinear convergence.展开更多
介绍了三电平升压Boost变换器在光伏发电系统最大功率点跟踪MPPT中的研究与实现。三电平Boost变换器与传统方法不同的是,前者通过精确的相移控制实现输出电容电压的平衡。文中采用扰动观察MPPT算法跟踪不同辐照度条件下的最大电压。三电...介绍了三电平升压Boost变换器在光伏发电系统最大功率点跟踪MPPT中的研究与实现。三电平Boost变换器与传统方法不同的是,前者通过精确的相移控制实现输出电容电压的平衡。文中采用扰动观察MPPT算法跟踪不同辐照度条件下的最大电压。三电平Boost变换器在宽输入范围电压为470~700 V时,输出电压、输出功率能够分别达到750 V和5 k W。采用数字信号处理器TMS320F28035控制MPPT。仿真结果表明,该系统的效率可达98%,MPPT平均精度可达98.6%。展开更多
文摘This paper presents a new algorithm for optimization problems with nonlinear inequality constricts. At each iteration, the algorithm generates the search direction by solving only one quadratic programming (QP), and then making a simple correction for the solution of the QP, moreover this new algorithm needn’t to do searching. The other advantage is that it may not only choose any point in En as a starting point, but also escape from the complex penalty function and diameter. moreover the iteration point will be a feasible descent sequence whenever some iteration point gets into the feasible region. So we call it subfeasible method.Under mild assumptions,the new algorithm is shown to possess global and two step superlinear convergence.
文摘介绍了三电平升压Boost变换器在光伏发电系统最大功率点跟踪MPPT中的研究与实现。三电平Boost变换器与传统方法不同的是,前者通过精确的相移控制实现输出电容电压的平衡。文中采用扰动观察MPPT算法跟踪不同辐照度条件下的最大电压。三电平Boost变换器在宽输入范围电压为470~700 V时,输出电压、输出功率能够分别达到750 V和5 k W。采用数字信号处理器TMS320F28035控制MPPT。仿真结果表明,该系统的效率可达98%,MPPT平均精度可达98.6%。
