摘要
逆变器是风力发电并网系统的主要部分,而Z源变换器因其具有的诸多优点已成为当今研究的热点。其中逆变器的控制策略是决定系统性能优劣和能否可靠运行的关键。文章在对风力发电并网逆变器系统数学模型分析的基础上,采用三值逻辑SPWM控制方法进行调制,从而设计出合适的逻辑开关方程来控制电流型Z源逆变器。仿真实验结果表明,该控制策略能获得较好的控制性能,并能实现单位功率因数校正。
Z-source converter now became research hotspot due to its advantages.Since inverter is the main part of the wind power grid system,and the control strategy of the inverter is the key which determines the good and bad of the system performance and if it could operate reliably.The paper uses three value logic SPWM control method and designs appropriate logic switch equation to control the current-fed Z-source inverter,based on the analysis of the mathematical model of the wind power grid system.Simulation results show that this control strategy can achieve good control performance,and can realize the unit power factor correction.
出处
《通信电源技术》
2011年第5期22-23,27,共3页
Telecom Power Technology
关键词
风力并网
电流型Z源逆变器
脉宽调制
wind power grid
current-fed Z-source inverter
pulse width modulation
