光伏逆变系统直流侧光电池MPPT及蓄电池充放电管理研究

Research on Photocells MPPT and Battery Charge and Discharge Management of Photovoltaic Inverter DC-side

随着电力电子的迅猛发展,光伏发电也由补充能源向替代能源逐步迈进。本文首先对光伏电池各种控制方法进行了比较,指出了其优缺点,并指出了蓄电池充放电管理的关键问题;在分析设计的基础上分别对光电池特性进行研究和数学建模。设计了最大功率点跟踪(简称MPPT)方案,以及蓄电池充放电管理策略,实现了直流侧光电池MPPT的控制。并用多种工况下的仿真结果加以验证。

With the rapid development of power electronics,photovoltaic power generation is put forward into A alternative energy source progressively rather than the supplementary one.The various control methods of PV battery are compared,and their advantages and disadvantages is listed.The key issues of battery energy management is the controlling of charging and discharging current by means of the converter.The analysis of PV battery characteristics and mathematical modeling are introduced.According to the model and given theoretical bases,a maximum power point tracking(MPPT)method and strategy of lead acid battery energy management are designed.The simulation results show that the MPPT is effective and feasible.