作　　者： ; ;

机构地区： 中南大学信息科学与工程学院

出　　处： 《电力系统及其自动化学报》 2006年第4期97-100,共4页

摘　　要： 提出了一种采用不等直流电压的H桥级联型静止无功发生器,输出的电平级数多于其他串联H桥,并结合选择谐波消除技术,大大减少了输出阶梯波中的谐波含量,使发生器可以和电源端直接耦合,避免了通过曲折变压器耦和带来的缺点。同时针对级联逆变器直流电压不容易均衡的问题,提出了一种不需要改动硬件电路的均衡方法。通过M ATLAB对系统的启动、输出波形、动态反应进行仿真,证明了设计的可行性,表明了系统的运行效果。 This paper presents a novel H-bridge cascaded static var generator with a design of unequal DC voltage which has more output levels. As a result of adopting the technology of selective harmonic elimination, the harmonics contained in the output are reduced obviously so that it can be coupled with the power source directly to avoid the disadvantages arising by multi-winding transformer. An approach is proposed to balance DC voltage of each unit without any hardware changes. Simulation to the starting, output and dynamic response of the system using Matlab verifies the validity of the design and its effectiveness.

关 键 词： 级联电路 静止无功发生器 导通角

领　　域： [电气工程]