中文摘要：

根据光伏电池的物理模型，以及光伏阵列在不同光照强度和环境温度下的输出特性，对基于boost电路的最大功率跟踪控制进行了理论分析及实现，讨论了三相光伏并网逆变器的工作原理，并在PSCAD／EMTDC中搭建了三相光伏并网系统．仿真结果表明，系统能够在温度和光照强度的阶跃变化下快速响应，并能够始终保持最大功率输出，验证了理论的有效性及可行性．

英文摘要：

According to physical model and output characteristic of photovohaic arrays,theoretical analysis and experimental results based on a Boost Circuit of MPPT research are presented. Furthermore, the principles of three-phase PV grid-connected inverter are analyzed and the mathematical model of the system is established under PSCAD/EMTDC environment. The simulation result shows that the system can guarantee the maximum power output of photovohaic array under sudden changes in solar irradiance and temperature, which verifies the validity and feasibility of theory.