基于单周控制的双频并网逆变器的仿真研究  

Simulation Study on Grid-connected Inverters with Double Frequency Based on One-cycle Control

作　　者：侯世英[1] 庹元科[1] 孙韬[1] 徐曦[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆沙坪坝400044

出　　处：《系统仿真学报》2009年第16期4951-4953,4957,共4页Journal of System Simulation

摘　　要：逆变器是可再生能源发电并网系统的主要部分,研究高性能拓扑与控制方法已经成为研究的重点。在分析传统的并网逆变器的基础上引入了的双频并网逆变器,该逆变器由两个标准三相桥级联而成,其中一个桥工作在高频,提高输出电流性能,另一个桥工作在低频,主要输出功率,从而提高系统效率。高频桥采用单周控制技术,建立了单周控制方程。仿真结果表明逆变器输出电流总的谐波畸变率低,有较好的动态性能。Developing a high performance topology and control strategy is a significant point in the inverter, which is an important part of renewable power generation system. On the basis of analyzing the traditional grid-connected inverter, the inverter with double frequency was proposed and analyzed The inverters are composed of two standard three-phase bridges cascaded One bridge works in high frequency to improve the performance of the output current, the other one works in low frequency to handle power and the system efficiency can be improved For the high frequency bridge, the one-cycle control is adopted. The simulation results illustrate that the inverter is controlled to generate the output current in phase with the grid voltaire with low harmonic distortion and better dynamic performance.

关 键 词：双频并网逆变器 单周控制 可再生能源 高效率 

分 类 号：TM614[电气工程—电力系统及自动化] TM615