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.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第16期4951-4953,4957,共4页
Journal of System Simulation
关键词
双频并网逆变器
单周控制
可再生能源
高效率
grid-connected inverter with double frequency
one-cycle control
renewable energy
high efficiency
