50MVA STATCOM的链节及其背靠背额定工况运行试验  

The Link and It’s Back-to-Back Rated Operational Tests of 50MVA STATCOM

作　　者：刘文华[1] 宋强[1] 张东江 陈天锦 

机构地区：[1]清华大学柔性输配电系统研究所,北京100084 [2]许继电源有限公司,许昌461000

出　　处：《电工技术学报》2005年第2期17-22,共6页Transactions of China Electrotechnical Society

摘　　要：上海西郊变电站的50MVA新型静止无功发生器(StaticvarCompensator,STATCOM)装置采用基于IGCT器件的链式逆变器,每相由10个IGCT单相逆变器(链节)串联而成并输出10kV线电压,IGCT器件容量为4500V/4000A。为了有效地验证链节在额定工况下运行时IGCT压装及连接工艺、控制电源、控制、保护、冷却、电磁兼容等方面的设计是否达到了技术标准的要求,需要对链接进行额定工况运行试验。试验时两个被试验链节输出通过一个连接电抗相连,通过控制两个链节输出电压相位角来控制链节间交换的无功功率方向和大小,损耗由连接到其中一个链节的直流电容的外接直流电源提供。文中给出了链节原理及其设计、背靠背试验原理以及试验结果。试验结果表明链节设计达到了链式STATCOM技术标准的要求。The 50MVA STATCOM installed at Shanghai Xijiao substation employs chain-circuit inverter based on IGCTs, and each phase comprises 10 single phase voltage-sourced inverters(Links) and outputs 10kV voltage. To verify the overall design of Link including connection of IGCT’s, control, protection, cooling and EMC, it’s necessary to test the Links in rated operation mode. In the tests, two Links are connected back-to-back via a inductor, one is controlled to operate in leading mode and the other in lagging mode, and power losses are provided by a DC power supply connected to one of the dc capacitors. The principle and design of the Link, the principle and the results of back-to-back tests are given in this paper. Tests results confirmed that all performance requirements were met.

关 键 词：STATCOM 链式多电平逆变器 集成门极换向型晶闸管 

分 类 号：TM733[电气工程—电力系统及自动化]