摘要
光伏系统实现MPPT的传统方法一般均需光伏系统输入电压、电流两个变量,且存在系统结构复杂、不利工程实现及不能直接反映负载的最大功率的缺陷,对此,提出一种以光伏系统的负载电流作为测量变量的单输入MPPT方法,以Boost拓扑为最大功率跟踪电路,选用简单有效的占空比扰动观察算法,分别建立了单、双输入法的MPPT算法的Matlab仿真模型,并进行仿真试验验证。结果表明,以光伏系统的负载电流作为测量变量的单输入MPPT方法简化了系统的控制结构,便于控制器的集成,节约了系统成本,几乎可适用于全部的负载类型,具有一定的实际应用价值。
The traditional MPPT of PV system usually needs two variables,the input voltage and current of PV system.But this method has several shortcomings：firstly,it has complex system structure.Secondly,it＇s hard to realize in the project.Thirdly,it can＇t reflect the maximum power of the load directly.Therefore,this paper proposes a single input MPPT method based on load current of PV system.The method chooses the Boost circuit as the research object and adopts the simple but effective duty cycle perturbation and observation method.Afterwards,it uses Matlab software to construct simulation model of MPPT algorithm with one or two inputs.Finally,the simulation is completed.The results indicate that the new method not only can simplify the control structure of system,but also make controller more integrated.At the same time,it saves the cost.Overall,it has certain practical value.
出处
《水电能源科学》
北大核心
2016年第3期211-214,93,共5页
Water Resources and Power
基金
河北省科技支撑计划项目(15212105D)
