中文摘要：

研究了光伏并网发电系统和独立发电系统中的能量管理及高效利用技术。针对光伏并网发电系统,提出一种模块化光伏并网发电系统结构及其系统效率优化控制方法,并进一步提出低漏电流高效率非隔离并网逆变器拓扑。针对光伏独立发电系统,提出采用三端口变换器统一、集中实现系统功率管理和控制,具有集成度高、效率高、体积成本低、控制性能好等优点。

英文摘要：

Energy management and effective utilization technology of PV generation system have attracted increasing interest recently. For grid-connected PV generation system, a kind of modular structure and its efficiency improvement method were proposed. Then, a kind of non-isolated grid-connected inverter topology was proposed to reduce the leakage current and improve the system efficiency. For stand-alone PV generation system, the three-port converter topologies were proposed to centralized system power management, which have the advantages of high density, high efficiency, low cost and good dynamic performance.