摘要
研究了一种基于交错并联反激变压器式光伏微逆变器的拓扑结构,在此基础上设计了一种单级式微逆变器控制系统。针对传统PI控制不能实现无静差控制的缺点,提出了一种可实现并网电流无静差的准PR并网控制策略。最后基于Saber平台建立了微逆变器并网仿真系统。仿真结果表明,采用准PR控制的微逆变器具有很好的输出电压和电流特性,验证了设计系统的正确性和可靠性。
This paper made a comprehensive analysis of the system structure and operating principles of parallel flyback PV micro-inverter,and designed a kind of control system of single-stage micro-inverter. Furthermore,to improve the drawbacks of traditional PI controller,a kind of quasi proportion resonance grid- connected control strategy,which could eliminate system static error,was proposed. Finally,the simulation system of micro-inverter grid-connected was verified on Saber platform. The simulation and experimental results demonstrate that the micro-inverter designed in the paper has the favorable character of output voltage and current. The correctness and reliability of the designed control system was proved by the simulation results.
出处
《低压电器》
2013年第21期51-54,共4页
Low Voltage Apparatus
关键词
微逆变器
光伏并网
准PR控制
SABER
micro-inverter
PV grid-connected
quasi proportion resonance control
Saber
