小型太阳能光伏系统一体机的研究

Research on small solar photovoltaic system all-in-one machine

针对小型太阳能光伏系统充电效率和一体机质量问题,提出一种新的充电控制策略,并对逆变器拓扑结构进行了改进。采用免疫模糊最大功率控制算法和过充电压温度补偿相结合的三阶段充电控制策略,使光伏系统在充分利用太阳能阵列输出功率的基础上,缩短铅酸蓄电池的充电时间,延长电池的寿命;采用一种去除了工频变压器的新型交错并联反激式逆变器拓扑产生220 V交流电供给负载,有效减小了逆变器体积,降低了系统成本。

Aiming at charging efficiency and the weight of all-in-one machine in the small solar photovoltaic （PV） systems, a new charging control strategy was proposed and the inverter topology was improved to solve the problem. The immune fuzzy maximum power point tracking （MPPT） control algorithm and overcharge voltage temperature compensation were used, which enabled PV system to make full use of the output power of the solar array. Meanwhile, the lead-acid battery charging time was shortened and the battery life was extended. A new staggered parallel flyback inverter topology without industrial frequency transformer was used to generate 220 V alternating current （AC） supplied to the load. The volume and system cost were effectively reduced.