NPC三电平并网逆变器SVPWM控制算法建模与仿真  

Modeling and Simulation of SVPWM Control Algorithm for NPC Three-level Grid Inverter

作　　者：薛家祥[1] 傅智河[2] 罗海松 马前进[1] 

机构地区：[1]华南理工大学,广东广州510641 [2]龙岩学院,福建龙岩364000

出　　处：《龙岩学院学报》2017年第2期1-7,共7页Journal of Longyan University

基　　金：福建省教育厅项目(JA15486);龙岩市科技计划项目(2014LY61);广东省协同创新与平台环境建设专项资金(2016B090918067);广州市产学研协同创新重大专项(201604010111)

摘　　要：针对二极管箝位式(NPC)三电平三相逆变器的并网算法,研究了NPC三电平三相并网逆变器的工作机理,并建立了NPC三电平三相逆变电路的简化模型与数学模型,提出了基于简化模型的SVPWM并网控制算法,通过Matlab仿真分析了该SVPWM并网控制算法的可行性与动态性能。结果表明基于简化模型的SVPWM并网控制算法的并网电流谐波率低,动态响应迅速,满足设计要求。Aiming at the grid- connected algorithm of NPC three- level three- phase inverter, the working mechanism of three-level, three-phase grid-connected inverter was studied. A simplified mathematical model of NPC three-level three-phase inverter circuit was established and a SVPWM grid-connected control algorithm based on this simplified model was proposed. The feasibility and dynamic performance of SVPWM grid-connected algorithm were analyzed by Matlab simulation. The results show that the grid current THD of the SVPWM grid-connected algorithm based on the simplified model is low and the dynamic response is quick, which meets the design requirements.

关 键 词：NPC三电平逆变器 SVPWM简化算法 MATLAB仿真 

分 类 号：TM46[电气工程—电器]