HVDC中调制理论谐波研究  

Harmonic Research in HVDC Modulation Theory

作　　者：肖超[1] 刘跃[1] 张仁红[1] 

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025

出　　处：《现代机械》2013年第4期86-89,共4页Modern Machinery

摘　　要：随着国民经济的持续发展,我国电力工业呈加速发展态势。交流输电由于系统自身的稳定问题使输送功率受到了限制,同时无功问题限制跨海及地下电缆输电距离,而HVDC不存在运行稳定问题,线路造价低、损耗少和不存在无功问题等使得HVDC重新获得了高度的重视。HVDC在换流器侧产生谐波较大,由于谐波的存在,增加了系统元件的附加谐波的损耗,降低了发电、输电和用电设备的使用效率,同时将使电力设备元件加速绝缘老化,缩短了使用寿命,严重的制约了HVDC的发展。因此本文提出了调制理论的方法对高压直流输电的谐波进行研究,利用该理论及数学模型将交直流相互变化联系起来,使得谐波的产生机理和传递机理阐述得更加简单清晰易懂。With the sustainable development of national economy, the electric power in our country industry is tren- ding to be developed accelerate. AC power due to the stability of the system itself problems make delivery received limit, at the same time, power and reactive power problems restricted bay and underground cables, transmission distance and high voltage direct current transmission does not run stability problems, lines, low cost, less wear and no reactive power problems make HVDC to regain a high degree of attention. HVDC transmission at the inverter side harmonic generation is larger, as a result of the existence of harmonic, increased the system components of additional harmonic losses, reduce the efficiency of power generation, transmission and use of electrical equipment, at the same time will make power equipment components accelerate insulation aging and shorten the service life and seriously restrict the development of high voltage di- rect current transmission. So this article puts forward the theory of modulation method to analysis the HVDC transmission of harmonic are studied, using the theory and the mathematical model to AC/DC changes linked to each other, to make the transfer mechanisnl of the generating mechanism of harmonic and more simple and clear to understand.

关 键 词：电力系统 HVDC 调制理论 谐波分析 非线性系统 

分 类 号：TM72[电气工程—电力系统及自动化]