脉冲充电在光伏系统充电控制中的应用

Application of pulse charging in charging control of PV system

考虑到光伏发电系统的特点,将脉冲充电方式应用于光伏发电系统充电控制中,提出了一种新的蓄电池充放电控制策略,能够有效改善蓄电池充电过程中的极化现象,实现快速充电,提高光伏电池的输出效率和蓄电池的充电效率。在充放电控制过程中,保证了直流母线电压的稳定,提高了光伏系统对负载的供电质量。通过对蓄电池分组充放电控制,改善了蓄电池长期欠充问题。针对蓄电池的充放电控制技术建立了Matlab/Simulink仿真模型,验证了该控制策略的可行性。

Considering the characteristics of photovoltaic power generation system, pulse charging was applied into charge control in PV system, and a new charge and discharge control strategy was advanced which effectively improved the polarization phenomenon in charging and enabled fast charging on the basis of increasing efficiency of the photovoltaic cell and the battery charging. The new method ensured the stability of the DC bus voltage, and enhanced the power supply quality of load. The charging and discharging control of battery group changed the under-charging problem in long term. Matlab/simulink results prove the validity of the theoretical analysis.