一种单相光伏系统并网策略研究  

The Research of a Single Phase Grid-Connected Strategy in Photovoltaic System

作　　者：崔开涌[1] 张翼[1] 俞俊杰[1] 陈国呈[1] 

机构地区：[1]上海大学自动化系上海市电站自动化技术重点实验室

出　　处：《变频器世界》2008年第10期41-44,共4页The World of Inverters

基　　金：教育部2006年博士学科点专项科研基金(20060280018);上海市教委重点科研基金(06ZZ03);上海市科委登山计划项目(06DZ12211)资助

摘　　要：提出了一种单相光伏并网系统控制策略,通DC/DC电路对变流器母线稳压,在并网端变流器中采用瞬时电流控制和以输出电流最大为目标的扰动观测改进算法。该控制策略避免了传统变流器电压外环调节速度慢的不足,同时对于最大功率点跟踪不依赖光伏电池输出特性检测。本策略具有MPPT跟踪速率快,成本低,并网电流畸变小等特点,通过实验结果验证了该方案的可行性和正确性。A control strategy of single phase photovoltaic grid-connected is proposed, which includes a DC-DC circuit for voltage regulation. The instantaneous current control and the disturbance observation based on direct current control MPPT strategy is used in the PV inverter. This strategy improves the speed of MPPT and doesn＇t need to get the output characteristic of photovoltaic cells. The experiment results of a single phase PV grid-connected inverter verify the availability and correctness of the proposed method.

关 键 词：光伏系统 最大功率点跟踪 并网 

分 类 号：TK514[动力工程及工程热物理—热能工程]