计算机与现代化

• 应用与开发 • 上一篇    

 光伏并网逆变器MLD建模及预测控制算法

  

  1. 广西大学电气工程学院,广西南宁530004
  • 收稿日期:2015-03-16 出版日期:2015-09-21 发布日期:2015-09-24
  • 作者简介: 路璐(1990-),男,河南新乡人,广西大学电气工程学院硕士研究生,研究方向:新能源并网发电; 龚仁喜(1962-),男,广西桂林人,教授,博士生导师,研究方向:新型半导体器件,电力电子器件特性及应用; 韦潜(1989-),男(壮族),广西南宁人,硕士研究生,研究方向:工业自动化。

Predictive Control Algorithm of PV Grid-connected Inverter Based on MLD Model

  1. College of Electrical Engineering, Guangxi University, Nanning 530004, China
  • Received:2015-03-16 Online:2015-09-21 Published:2015-09-24

摘要: 光伏并网逆变器传统的开关函数模型在并网过程中的动态响应速度慢,影响了逆变器溃入电网的电能质量。为了解决这一问题,提高光伏并网逆变器的供电质量,分析光伏并网逆变器的混杂特性,通过对逆变器的开关动态引入逻辑变量,建立MLD模型,提出一种基于该模型的预测控制算法。仿真结果表明,基于MLD模型的预测控制算法改善了光伏并网系统的动态性能,达到并网要求条件的时间更短,验证了所提方法的可行。

关键词:  , 光伏并网逆变器, 混合逻辑动态模型, 模型预测控制

Abstract:  The slow respond of the inverter PV grid system based on traditional switching function model affects the power quality feed into the grid. To solve this problem and improve the power quality of the inverter, after analyzing the PV grid-connected inverter confounding characteristics, by introducing logical variables for the inverter switching dynamics, the MLD model of the system was built. A predictive control strategy was proposed based on this kind of model. The comparison of simulation results show that the predictive control algorithm on the MLD model can improve the dynamic performance of the system, reduce the time of the system meeting the requirement of the grid, verify the feasibility of the proposed method.

Key words:  PV grid-connected inverter; MLD, model predictive control