可控电抗器及其谐波抑制的研究  

Research on Controllable Reactor and Its Harmonic Suppression

作　　者：周丽霞[1] 尹忠东[1] 张华[2] 郑立[3] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京102206 [2]华北电网廊坊供电公司,河北廊坊065000 [3]华北电网邢台供电公司,河北邢台054000

出　　处：《现代电力》2006年第2期10-14,共5页Modern Electric Power

摘　　要：阐述了磁阀式可控电抗器的基本结构和工作原理,以抑制可控电抗器在接入电网时自身向电网注入的谐波为目的,分析了其谐波抑制措施。提出了一种基于移相绕组的新型可控电抗器的谐波抑制拓扑结构:将可控电抗器接成三角形,然后通过移相绕组接入电网。同时,根据系统的容量、对系统的要求以及所要消除的谐波次数等,设计相应的相间绕组的连接方式和选取合适的移相绕组匝数,以此来获得所需要的移相电压,从而削弱由可控电抗器本身所产生的谐波。通过EMTDC/PSCAD软件进行了仿真,把配置移相绕组前后的可控电抗器电路的电流波形进行了对比,并对其谐波含量做了傅立叶分析,结果表明,配置移相绕组能很好地抑制可控电抗器向电网注入的谐波,验证了论文提出方案的有效性。The paper presents the basic structure and operation principle of magnetic valve type controllable reactor. The harmonics-suppression measures are analyzed with the purpose of restraining the harmonics poured into the power grid by the controllable reactor itself. A new kind of harmonic-suppression topology of controllable reactor is introduced in this paper. That is to connect the controllable reactors into triangle, then connect them with the power grid through phase-shifting winding. According to the system capacity, request of the system and the harmonic order that want to eliminate, designs the corresponding connection way of phase winding and chooses appropriate numbers of phaseshifting winding to obtain the phase-shifting voltage needed and reduce the harmonics that produced by the controllable reactor itself. Simulations are done through the software of EMTDC/PSCAD, the current waveforms under different condition are compared, and the harmonic content is also analyzed by using Fourier method. The results show that phase-shifting winding can reduce the harmonics produced by the controllable reactor effectively, and the EMTDC/ PSCAD based simulation results also verify the validity of proposed scheme.

关 键 词：可控电抗器 数学模型 移相绕组 谐波抑制 仿真 

分 类 号：TM47[电气工程—电器]