基于电流滞环控制的Z源光伏独立发电系统  

Independent PV Power Generation System Based on Current Hysteresis Control Used in Z-source

作　　者：黄金军[1,2] 郑建勇[1,2] 尤鋆[1,2] 张先飞[1,2] 

机构地区：[1]东南大学,江苏南京210096 [2]苏州市电气设备与自动化重点实验室,江苏苏州215123

出　　处：《电力电子技术》2010年第6期37-39,共3页Power Electronics

基　　金：国家863计划资助项目(2008AA052421)~~

摘　　要：Z源光伏发电系统中,针对Z拓扑,必须在开关信号中加入直通信号,而传统的滞环控制算法无法实现。针对这一局限,提出了一种新的适用于Z源光伏独立发电系统的定频电流滞环控制策略,该策略保留了传统滞环控制的优点,同时由于采用定频控制,降低了系统损耗,便于滤波;有了Z源的升压作用,系统输出电流大大提高;在系统负载变动时能及时调整参考电流值,保证负载端电压恒定。通过Matlab仿真和实验证明了该策略的正确性。In Z-source based PV power generation system,for Z topology,shoot through time must be added in the switch signals.Traditional hysteresis control algorithm can not be achieved.In response to this limitation,this paper presents a new kind of control algorithm based on fixed-frequency current hysteresis used in Z-source based independent PV power generation system.The strategy retains the advantages of traditional hysteresis control.Because it is a fixed-frequency control,The system loss is reduced,and it is easy to filting.With the boosting role of Z-source,the output current of system is greatly increased.When system load changed,reference current would be adjusted to ensure load terminal voltage constant.By simulation with Matlab and experimental results,the correctness of the stategy is proved.

关 键 词：逆变器 电流滞环 负载电压 参考电流 

分 类 号：TM464[电气工程—电器]