非隔离型逆变器输出直流分量的研究  

Research on DC components in output of non-isolated inverter

作　　者：宋平岗[1] 尹亮[1] 徐凯[1] 

机构地区：[1]华东交通大学,江西南昌330013

出　　处：《电源技术》2014年第3期508-510,共3页Chinese Journal of Power Sources

摘　　要：针对非隔离型并网逆变器输出电流向电网中注入直流分量的问题,在改进并网型逆变器的基础上,提出了一种基于虚拟电容原理的新的控制策略。这种逆变器本身具有一定的隔离作用,可以防止直流注入电网,运用新的控制方法能够更好地消除直流分量对电网的影响。设计了一个400 V/10 A的并网系统,运用仿真实验对提出的方案进行验证,结果表明新的控制策略能够很好地抑制直流分量。For the DC component in output of non-isolated and grid-connected inverter injecting to the grid, a new control strategy based on the principle of virtual capacitor was proposed. This inverter was taken as a certain role in isolation DC component was prevented to inject into the grid. This new control strategy was better able to eliminate the DC component of the grid. A 400 V/10 A grid system was produced. The feasibility of this control strategy was verified by the simulation results.

关 键 词：直流分量 逆变器 虚拟电容 控制策略 

分 类 号：TM464[电气工程—电器]