光伏并网逆变器模糊准PR控制仿真研究.pdfVIP

学兔兔 第5l卷 第l9期 电测与仪表 V0I．51 NO．19 2014年 l0月lO日 Electrical Measurement＆ Instrumentation oct．10．2014 光伏并网逆变器模糊准PR控制仿真研究半 姚鑫，罗晓曙，廖志贤，李志红 (广西师范大学电子工程学院，广西桂林541004) 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。 关键词：单相并网逆变器；电流控制；准PR控制；模糊控制 中图分类号：TM615 文献标识码：B 文章编号：1001—1390(2014)19—0086—06 The Simulation Research on Fuzzy Quasi PR Control of PV Grid Connected Inverter YAO Xin，LUO Xiao—shu，LIA0 Zhi—xian，LI Zhi—hong (The College of Electronic Engineering，Guangxi Normal University，Guilin 541004，Guangxi，China) Abstract：A fuzzy quasi PR method is proposed for the nonlinear characteristics of photovohaic grid connected inverter system based On the research on the PR control method with fixed parameters．Firstly，the structure of single—phase photovohaic 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．r Key words：single—phase grid connected inverter，current control，Quasi PR control，fuzzy control 0