基于模糊PI控制的三相光伏并网逆变器的仿真  

Simulation of Three-Phase Photovoltaic Grid-Connected Inverter Based on Fuzzy PI Control

作　　者：吴学敏[1] 蒋林[1] 

机构地区：[1]西南石油大学,四川成都610500

出　　处：《自动化技术与应用》2015年第9期80-85,共6页Techniques of Automation and Applications

基　　金：国家自然科学基金(编号51204139);四川省教育厅科技项目(编号13ZB0199)

摘　　要：为保证整个光伏系统高效节能运行,就必需要求逆变器具有稳定、快速的运行性能,且拥有高效的转换效率和较强的鲁棒性。本文介绍了三相光伏并网逆变器控制的基本原理并将模糊PI控制应用于光伏并网逆变器的控制中。当光照环境等条件改变时光伏发电系统的工作条件会发生一系列非线性变化,使得逆变跟踪电网电压的精度下降,难以实现并网的要求。本文所提出的模糊PI控制可以实时改变控制器参数值,改善光伏系统并网控制的动态过程,减低并网的谐波畸变率,最终能够实现光伏系统的平滑并网。通过仿真验证了并网控制策略的可行性和优越性。In order to ensure energy-efficient operation of the entire PV system, the inverter must be requested with a stable, fast operating performance, and has a highly efficient conversion efficiency and robustness. This paper introduces the basic principles of the three-phase photovoltaic grid-connected inverter control and applies fuzzy PI control to PV grid-connected inverter control. Along with the ambient light conditions change, the working conditions of photovoltaic power generation system has a series of non-linear changes and causes to drop grid voltage inverter tracking accuracy, it is difficult to achieve the network requirements. The proposed fuzzy PI control of controller parameter values can be changed in real time, to improve the photovoltaic system and network dynamic process control to reduce harmonic distortion of network, and ultimately to achieve smooth interconnection ofphotovoltaic system. Simulation shows that grid-connected inverter control strategy is feasibility and superiority.

关 键 词：光伏 模糊控制 并网逆变器 空间矢量控制 

分 类 号：TP615[自动化与计算机技术—控制理论与控制工程]