基于MPPT的光伏蓄电池脉冲充电技术研究

Research on pulse charging technology of photovoltaic battery based on MPPT

随着太阳能资源的广泛利用,光伏发电技术也日益受到重视。蓄电池作为光伏系统重要的组成部分,使用寿命受光伏系统的间歇性与随机性影响。常见的蓄电池充电策略存在光伏电池发电利用率低,充电速率慢和寿命短的问题。针对以上问题,结合光伏电池最大功率点跟踪(maximum power point tracking,MPPT)和蓄电池阶段充电技术,提出基于MPPT的蓄电池脉冲充电策略。在Simulink中搭建仿真模型,仿真结果表明,采用蓄电池初始阶段MPPT充电和后期脉冲充电策略可有效利用光伏发电功率,加快蓄电池充电速度,同时延长蓄电池使用寿命。

With the widespread use of solar energy resources,photovoltaic power generation technology also receives increasing attention.As an important part of the photovoltaic system,the battery life is affected by the intermittent and random nature of the photovoltaic system.Common battery charging strategies have the problems of low photovoltaic cell power generation utilization,slow charging rate and short life.In response to the above problems,combined maximum power point tracking(MPPT)of photovoltaic cells with battery stage charging technology,the battery pulse charging strategy based on MPPT was proposed.A simulation model was built in Simulink,and the simulation results show that the initial stage MPPT charging of the battery and the later pulse charging strategy can effectively utilize the photovoltaic power generation,speed up the battery charging speed,and prolong the battery life.