不断变化的外部环境对光伏列阵的输出有着特殊的影响,为减小能量损失,须对光伏阵列进行最大功率点跟踪(maximum power point tracking,MPPT)。粒子群优化算法(particle swarm optimization,PSO)在多峰值寻优中具有良好的性能,然而粒子...不断变化的外部环境对光伏列阵的输出有着特殊的影响,为减小能量损失,须对光伏阵列进行最大功率点跟踪(maximum power point tracking,MPPT)。粒子群优化算法(particle swarm optimization,PSO)在多峰值寻优中具有良好的性能,然而粒子在寻优的过程中经常出现过早收敛的现象,导致其寻优精度有所欠缺。为解决以上的缺陷,提出一种改进的自适应粒子群(improved particle swarm optimization,IPSO)与布谷鸟搜索(cuckoo search,CS)混合算法应用于最大功率点跟踪。并在MATLAB/Simulink平台中搭建仿真模型对混合算法进行验证,并与其他方法进行比较,仿真结果证明,改进算法有良好的响应速度和较高的优化精度。展开更多
This paper mainly aims at the modeling problem of the photovoltaic (PV) array with a 30 kW PV grid-connected generation system. An iterative method for the time-varying parameters is proposed to model a plant of PV ar...This paper mainly aims at the modeling problem of the photovoltaic (PV) array with a 30 kW PV grid-connected generation system. An iterative method for the time-varying parameters is proposed to model a plant of PV array. The relationship of PV cell and PV array is obtained and the solution for PV array model is unique. The PV grid-connected generation system is used to demonstrate the effectiveness of the proposed method by comparing the calculated values with the actual output of the system.展开更多
The modeling of PV （photovoltaic） systems is very crucial for embedded power system applications and maximum power point tracking. This paper presents a PV array model using Matlab/Simulink with the assistance of Si...The modeling of PV （photovoltaic） systems is very crucial for embedded power system applications and maximum power point tracking. This paper presents a PV array model using Matlab/Simulink with the assistance of SimPowerSystem toolbox. The PV cell is considered as the main building block for simulating and monitoring the PV array performance. The PV model has been developed and used as Simulink subsystems where the effect of solar insolation and PV array temperature on commercial PV modules have been studied throughout the simulated I-V and P-V output characteristics. The proposed model facilitates simulating the dynamic performance of PV-based power systems. The effect of different partial shading patterns of PV arrays under different configurations has been studied.展开更多
For multiple grid-connected inverters with active filter function,it makes sense to regulate every unit to output maximum active power from photovoltaic arrays,as well as eliminate the harmonic due to the non-linear l...For multiple grid-connected inverters with active filter function,it makes sense to regulate every unit to output maximum active power from photovoltaic arrays,as well as eliminate the harmonic due to the non-linear loads connected to the electric networks.Naturally,a centralized control coordination strategy was proposed for the purpose of high facility utilization,good harmonic compensation ability and unwanted overcompensation condition.Based on a vector decoupling control scheme and generalized instantaneous reactive power theory,the solution was to allocate the harmonic eliminating task for every inverter according to the instantaneous power margin of each.The grid current always keeps sinusoidal in spite of non-linear load change and output active power change for any inverter.The simulation results validate the efficacy of the proposed coordination strategy.展开更多
文摘不断变化的外部环境对光伏列阵的输出有着特殊的影响,为减小能量损失,须对光伏阵列进行最大功率点跟踪(maximum power point tracking,MPPT)。粒子群优化算法(particle swarm optimization,PSO)在多峰值寻优中具有良好的性能,然而粒子在寻优的过程中经常出现过早收敛的现象,导致其寻优精度有所欠缺。为解决以上的缺陷,提出一种改进的自适应粒子群(improved particle swarm optimization,IPSO)与布谷鸟搜索(cuckoo search,CS)混合算法应用于最大功率点跟踪。并在MATLAB/Simulink平台中搭建仿真模型对混合算法进行验证,并与其他方法进行比较,仿真结果证明,改进算法有良好的响应速度和较高的优化精度。
基金Supported by the National Natural Science Foundation of China (61233004, 61074061)the State Key Development Program for Basic Research of China (2013CB035500)+1 种基金the National High Technology Research and Development Program of China(2011AA040901)Key Project of Ministry of Railways of China (J2011J004)
文摘This paper mainly aims at the modeling problem of the photovoltaic (PV) array with a 30 kW PV grid-connected generation system. An iterative method for the time-varying parameters is proposed to model a plant of PV array. The relationship of PV cell and PV array is obtained and the solution for PV array model is unique. The PV grid-connected generation system is used to demonstrate the effectiveness of the proposed method by comparing the calculated values with the actual output of the system.
文摘The modeling of PV （photovoltaic） systems is very crucial for embedded power system applications and maximum power point tracking. This paper presents a PV array model using Matlab/Simulink with the assistance of SimPowerSystem toolbox. The PV cell is considered as the main building block for simulating and monitoring the PV array performance. The PV model has been developed and used as Simulink subsystems where the effect of solar insolation and PV array temperature on commercial PV modules have been studied throughout the simulated I-V and P-V output characteristics. The proposed model facilitates simulating the dynamic performance of PV-based power systems. The effect of different partial shading patterns of PV arrays under different configurations has been studied.
基金Project(51107111)supported by the National Natural Science Foundation of China
文摘For multiple grid-connected inverters with active filter function,it makes sense to regulate every unit to output maximum active power from photovoltaic arrays,as well as eliminate the harmonic due to the non-linear loads connected to the electric networks.Naturally,a centralized control coordination strategy was proposed for the purpose of high facility utilization,good harmonic compensation ability and unwanted overcompensation condition.Based on a vector decoupling control scheme and generalized instantaneous reactive power theory,the solution was to allocate the harmonic eliminating task for every inverter according to the instantaneous power margin of each.The grid current always keeps sinusoidal in spite of non-linear load change and output active power change for any inverter.The simulation results validate the efficacy of the proposed coordination strategy.
