基于电流滞环控制的Z源三相光伏并网系统  

Z-source three-phase grid-connected PV system based on current hysteresis control

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]东南大学电气工程学院,江苏南京210096 [2]东南大学苏州研究院苏州市电气设备与自动化重点实验室,江苏苏州215123

出　　处：《电力自动化设备》2010年第10期94-97,共4页Electric Power Automation Equipment

基　　金：国家863计划资助项目(2008AA052421)~~

摘　　要：提出了一种适用于Z源三相光伏并网系统的定频电流滞环控制策略。运用三相半桥电路实现滞环控制,解决了直通时间的插入问题,易于DSP实现;采用Z源拓扑进行升压,提高了光伏系统的电流输出能力;采用定频电流滞环控制,不仅具有滞环控制下跟踪速度快、稳定性高、保持并网电流与电网电压同相位的优点,而且由于采用定频控制,降低了开关损耗,简化了滤波电路的设计。Matlab仿真和小功率实验验证了所提策略的可行性。A fixed-frequency current hysteresis control strategy is proposed for Z- source three- phase grid-connected PV system. The three-phase half-bridge circuit is adopted in hysteresis control to ease the insertion of shoot-through time and the implementation by DSP. The Z-source topology is adopted to boost the voltage and enhance the current output capacity. The fixed-frequency current hysteresis control has fast tracking speed and high stability,which maintains the phase of paralleling current the same as that of grid voltage. The application of fixed-frequency control reduces the switching loss and simplifies the filter circuit design.

关 键 词：Z源逆变器 三相滞环 直通时间 驱动信号 

分 类 号：TM464[电气工程—电器] TM615