摘要
针对光伏并网逆变器系统的非线性特性,在固定参数PR控制方法的基础上,提出了一种模糊准PR控制方法。首先介绍单相光伏并网逆变器的结构,并分析准PR控制的实现算法、离散化和谐波滤除,然后把模糊控制和准PR控制结合应用于并网逆变器同步控制。最后利用Matlab/simulink平台进行仿真实验,结果表明:与准PR方法相比,所提出的控制方法可使电网电流同步误差更小,适应性和抗干扰性更强,因而具有较好的应用价值。
A fuzzy quasi PR method is proposed for the nonlinear characteristics of photovoltaic grid connected inverter system based on the research on the PR control method with fixed parameters. Firstly,the structure of single- phase photovoltaic grid connected inverter will be introduced. Besides,the working principle of quasi PR control algorithm,the discretization method and the harmonic filtering out will be analyzed in detail. Then,the fuzzy control and quasi PR control will be combined to be applied in grid connected inverter synchronization. At last,by using the Matlab /simulink platform simulation and experimental verification,the simulation experiment results show that the proposed fuzzy quasi PR method can effectively improve the tracking effect compared with the traditional quasi PR method. So this method has a great application value.
出处
《电测与仪表》
北大核心
2014年第19期86-91,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(11262004)
广西科学研究与技术开发计划(桂科攻1348017-2)
广西师范大学2013年度青年基金资助项目
关键词
单相并网逆变器
电流控制
准PR控制
模糊控制
single-phase grid connected inverter
current control
Quasi PR control
fuzzy control
