摘要
为满足小功率光伏阵列并网的需求,以dsPIC30F3011芯片为控制器设计了一种2 kW的单相光伏并网逆变器。给出了光伏并网逆变器的主电路结构及控制方案,采用了Boost电路及改进的扰动观察法来实现MPPT过程;在并网过程中,采用了电压电流双闭环控制策略,实现了单位功率因数并网。最后设计了系统的硬件电路及控制软件,并通过实验验证了逆变器的可靠性。
A 2kW single phase photovoltaic grid-connected inverter using chip dsPIC30F3011 as controller is designed to satisfy the small power photovoltaic grid-connected demand. This paper presents the main circuit structure and control scheme of the grid-connected photovoltaic inverter and adopts the Boost circuit and improved disturbance observation method to realize the MPPT process. In the grid connecting process,the inverter adopts the voltage-current closed-loop control strategy to achieve grid connection through unity power factor. Finally,the system circuit and control software are given and the inverter＇s reliability is verified through experiments.
出处
《电气自动化》
2013年第6期20-22,共3页
Electrical Automation
基金
甘肃省科技支撑计划(1204GKCA003)
