【摘要】 采用爬山法实现了光伏系统的最大功率点跟踪(maximum power point tracking,MPPT)和铅酸蓄电池充电控制,并用单极性SPWM调制方法对逆变器进行控制.实验结果表明,本系统更充分地利用了光伏阵列的输出功率,缩短了过充阶段时间,提高了充电效率,克服了大多数光伏系统中蓄电池欠充的缺陷,延长了铅酸蓄电池的使用寿命.所采用的单极性调制相比于双极性调制,在输出同样幅值基波电压时,最小谐波频率为载波频率的2倍,且谐波幅值较低,从而使输出端滤波器的设计更加容易.更多还原

【Abstract】 A novel lead-acid battery charge control strategy and maximum power point tracking algorithm for photovoltaic system are presented.A method of single polarity SPWM modulation for inverter is implemented.Experimental results show that the output power of photovoltaic array is fully utilized,the time of overcharging is significantly reduced,and charging efficiency is improved and battery lifetime prolonged due to higher-level state of the charge operation.Compared with the traditional modulation,the lowest harmonic frequency is improved under the same condition.Furthermore,design of the output filter becomes easier.更多还原