摘要
光伏并网发电系统是光伏发电系统发展的趋势。文中介绍了单极式光伏系统的拓扑结构和实现最大功率的工作原理,阐述了电导增量法实现MPPT的基本思想。根据光伏系统并网发电拓扑结构,设计了一套新型的实现最大功率跟踪的单极式光伏并网逆变器。逆变器控制部分由DSP实现最大功率跟踪和输出电流跟踪控制,实现了逆变输出电流与电网同步,且高功率因数运行。仿真结果表明,单极式光伏并网逆变系统能准确跟踪太阳能电池最大功率点,并具有较好的稳定性。
Grid-connected photovoltaic （PV） system is the trend of photovoltaic system＇s development. This paper introduces the topology and MPPT＇s principle of single-state PV system, as well as the basic principle to realize MPPT by conductance increment method. According to the topology of the PV system, a novel single-state PV inverter is designed. The inverter is of MPPT and export current tracking and synchronization with the utility and operation at high power factor based on DSP. Simulink result illustrates single-state grid-connected PV system can realize MPPT accurately; it also shows the high stability and high efficiency.
出处
《通信电源技术》
2007年第4期18-20,共3页
Telecom Power Technology
关键词
并网光伏系统
最大功率点跟踪
电导增量法
单极并网逆变器
grid-connected photovoltaic （PV） system
maximum power point tracking
conductance increment method
single-state PV inverter
