【摘要】 为克服传统的独立光伏发电系统存在能量管理复杂、所用开关器件多等缺点,提出一种新型独立光伏三端口逆变器及其能量管理控制策略。系统由光伏模块、蓄电池、升压电路、双向充放电路、双绕组隔离逆变电路及负载组成,具有光伏模块的升压和最大功率点跟踪、蓄电池的双向充放电和逆变隔离的功能。根据光伏模块和蓄电池的工作模式和工作状态,分别控制单向、双向及逆变电路使光伏模块和蓄电池协调工作,确保系统高效稳定的工作。通过Matlab/Simulink对系统进行仿真,仿真结果验证了所提新型独立光伏三端口逆变器正确及其有效。更多还原

【Abstract】 The defects of traditional stand-alone photovoltaic power system were that which need complex energy management and plenty of switches.In order to overcome these problems,a novel stand-alone photovoltaic power system and its strategy of energy management is proposed in this paper.The system consists of a PV module,a battery,a boost converter,a bi-directional charge-discharge converter and a isolated inverter.It has the advantages of boost and maximum power point tracking of PV module,bi-directional charge-discharge of battery,and isolation.Through controlling the boost converter and the bi-directional converter and the inverter to operate in an appropriate state depending on the operation pattern of solar cell and battery.This strategy makes the system operation with high efficiency and stable state.Matlab simulation results show the effectiveness the proposed three-port inverter.更多还原