基于电力电子变流器的机端次同步阻尼控制器研究与测试  

Research and Test of a Generator Terminal Subsynchronous Damping Controller Based on Power Electronic Converter

作　　者：谢小荣[1] 郭锡玖[2] 吴景龙[2] 赵永林[2] 刘全[3] 康君[2] 董晓亮[1] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]北方联合电力有限责任公司,内蒙古自治区呼和浩特市010020 [3]四方电气(集团)有限公司,北京市海淀区100085

出　　处：《中国电机工程学报》2014年第4期666-671,共6页Proceedings of the CSEE

基　　金：国家自然科学基金资助项目(51322701;51077080)~~

摘　　要：针对大型汽轮发电机接入串补输电系统面临的次同步谐振问题,研制出一种基于电力电子变流器的机端次同步阻尼控制器(generator terminal subsynchronous dampingcontroller,GTSDC)。它由多模态次同步阻尼控制器和基于链式结构的高压大容量电流跟踪变流器构成,通过向机组定子侧注入幅值和相位可控的扭振模态互补频率的电流,实现抑制轴系扭振的目标。阐述GTSDC的工作原理和设计方法,研发一套等效容量为10 MVA、输出电压为22 kV的装置,并在上都电厂660 MW机组上进行现场参数整定和效果试验,结果表明:所研发的GTSDC能大幅提高扭振模态阻尼并有效抑制持续激励引发的强迫性轴系扭振,为解决次同步谐振和振荡问题提供了一种新颖而有效的技术手段。A novel generator terminal subsynchronous damping controller （GTSDC） based on power electronic converter was proposed and developed to mitigate subsynchronous resonance （SSR）, a serious problem confronted by larger turbine-generators connected to series-compensated power systems. The proposed GTSDC is composed of a multimodal subsynchronous damping controller and a high-power current-tracking inverter. It can depress the torsional vibration by injecting controllable currents at complementary frequencies to torsional modes into the stator of the target generator. Its working principle and designing approach were elaborated in the paper. A practical equipment with a rating of 10 MVA/22 kV had been manufactured and then tested on a 660 MW turbine-generator at Shangdu Power Plant. Test results verified that GTSDC can improve modal damping considerably and suppress sustained torsional oscillation effectively. It provides a new countermeasure to inhibit subsynchronous resonance and oscillation.

关 键 词：次同步谐振 机端次同步阻尼控制器 模态阻尼 电流跟踪控制 现场试验 

分 类 号：TM712[电气工程—电力系统及自动化] TM761