中文摘要：

对传统的光伏电池数学模型进行改进,并在PSCAD仿真环境下对其进行建模。考虑到光伏系统存在最大功率跟踪（maximum power point tracking,MPPT）的问题,因此有必要建立MPPT的仿真模块。系统仿真结果充分体现了改进后光伏电池的有效性,MPPT控制效果非常明显。

英文摘要：

By modifying the traditional mathematical model of PV cell,an improved PV model under PSCAD environ-ment has been established.Taking into account the problems of MPPT in PV system,it is necessary to establish MPPT simulation module.The simulation results imply that the effectiveness of modified PV cell,and the control effect of MPPT is very obvious.