在光伏阵列受到局部阴影遮挡条件下,针对光伏阵列的功率-电压(P-V)输出特性曲线在多峰值状态下的最大功率点跟踪(maximum power point tracking,MPPT)问题,通过对粒子群(particle swarm optimization,PSO)算法的改进,提出了一种基于新...在光伏阵列受到局部阴影遮挡条件下,针对光伏阵列的功率-电压(P-V)输出特性曲线在多峰值状态下的最大功率点跟踪(maximum power point tracking,MPPT)问题,通过对粒子群(particle swarm optimization,PSO)算法的改进,提出了一种基于新型粒子群(novel particle swarm optimization,NPSO)算法的MPPT方法(以下简称NPSO_MPPT算法)。NPSO算法通过将种群粒子分为收敛粒子和自由粒子两类,提高了原始PSO算法的全局搜索能力。在Simulink环境下,分别对P&O、基于PSO算法的MPPT方法(以下简称PSO_MPPT算法)和NPSO_MPPT算法进行仿真测试,仿真结果表明,NPSO_MPPT算法相比较现有的P&O和PSO_MPPT算法,具有发电效率高和不易陷入局部功率极大值等优点。展开更多
Pd/TiO2 nanospheres assembled from nanorods with three-dimensional hyperstructure for enlianced photodegradation of organic dye was prepared by a sample solvothemial method. Further, it was used for degradation of met...Pd/TiO2 nanospheres assembled from nanorods with three-dimensional hyperstructure for enlianced photodegradation of organic dye was prepared by a sample solvothemial method. Further, it was used for degradation of methyl orange(MO) under the illumination of visible-light(simulated).The results show that Pd/TiO2 with 2%(mass fraction) Pd exhibits the noticeable activity in photodegrading of MO.The detailed analysis shows that this enhancement is attributed to the reduction of the rate of electron-hole recombination and surface plasmon resonance of Pd. The high activity and good stability of the obtained Pd/TiO2 nano spheres make it a promising photocatalyst for solving the environmental pollution problems.展开更多
文摘在光伏阵列受到局部阴影遮挡条件下,针对光伏阵列的功率-电压(P-V)输出特性曲线在多峰值状态下的最大功率点跟踪(maximum power point tracking,MPPT)问题,通过对粒子群(particle swarm optimization,PSO)算法的改进,提出了一种基于新型粒子群(novel particle swarm optimization,NPSO)算法的MPPT方法(以下简称NPSO_MPPT算法)。NPSO算法通过将种群粒子分为收敛粒子和自由粒子两类,提高了原始PSO算法的全局搜索能力。在Simulink环境下,分别对P&O、基于PSO算法的MPPT方法(以下简称PSO_MPPT算法)和NPSO_MPPT算法进行仿真测试,仿真结果表明,NPSO_MPPT算法相比较现有的P&O和PSO_MPPT算法,具有发电效率高和不易陷入局部功率极大值等优点。
基金Supported by the National Natural Science Foundation of China(No.51672103)the Science and Technology Development Project of Jilin Province, China(Nos.JJKH201805 85KJ,20190201286JC,20170101111JC).
文摘Pd/TiO2 nanospheres assembled from nanorods with three-dimensional hyperstructure for enlianced photodegradation of organic dye was prepared by a sample solvothemial method. Further, it was used for degradation of methyl orange(MO) under the illumination of visible-light(simulated).The results show that Pd/TiO2 with 2%(mass fraction) Pd exhibits the noticeable activity in photodegrading of MO.The detailed analysis shows that this enhancement is attributed to the reduction of the rate of electron-hole recombination and surface plasmon resonance of Pd. The high activity and good stability of the obtained Pd/TiO2 nano spheres make it a promising photocatalyst for solving the environmental pollution problems.
