用于光伏发电的串联全桥DC-DC变换器

摘要

DC-DC converter for solar photovoltaic power generation is used to boost the voltage at DC side of the inverter.Full bridge structure have the characteristics such as low rate voltage power switch,high efficiency of the transformer,advantage to soft-switching.Standard full-bridge DC-DC converter is designed in series-connected versions and their operation has been evaluated in simulation.The result shows that the switches peak current can be significantly reduced,thus the costs can be reduced and the energy source utilization can be improved.%光伏发电系统中DC-DC变换器的作用是使太阳能光伏电池电压达到光伏系统逆变环节的直流母线电压的要求。其中,全桥结构具有功率开关管电压应力小、变压器利用率高、容易实现软开关的特点,现将标准的全桥DC-DC变换器重新设计成串联形式,用计算机仿真来评估其工作状况,结果表明,开关的工作峰值电流被显著地减小了,减少了损耗并提高了电源的利用率。