上都电厂轴系次同步扭振保护系统  

Shafting torsional protection system at Shangdu power plant

作　　者：陈大宇 赵永林 刘全[2] 张远取[3] 谢小荣[3] 

机构地区：[1]上都发电有限责任公司,内蒙古自治区锡林郭勒盟027200 [2]四方电气(集团)有限公司,北京100084 [3]清华大学电机系电力系统国家重点实验室,北京100084

出　　处：《电力系统保护与控制》2010年第6期122-125,共4页Power System Protection and Control

基　　金：电力系统国家重点实验室项目(SKLD08M02);国家重点基础研究发展计划(973项目)(2004CB217906);国家电网公司科技项目资助(20090857)

摘　　要：针对次同步谐振(SSR)危及机组轴系安全问题,研发了轴系次同步扭振保护系统。该保护系统包括底层的扭应力继电器(TSR)和上层的保护协调机(Tmaster)。TSR实时采集轴系模态转速信号,进而判别扭振模态稳定性和疲劳寿命是否越限,并将判断结果传递给Tmaster,由后者执行选择性跳机逻辑,从而起到保护机组轴系的作用。将所述次同步扭振保护系统应用于上都电厂串补输电系统,分析了其运行机制和定值设置。保护系统自2008年9月投运以来,经历了现场试验和实际故障的考验,起到了正确检测次同步扭振和保护机组轴系安全的作用。A subsynchronous torsional protection scheme is developed to protect generator shafts from damage caused by subsynchronous resonance（SSR）.The scheme is composed of the bottom-layered torsional stress relay（TSR） and the upper-layered coordinator,called Tmaster.The TSR gathers the modal speed of generator shafts in real time and detects dangerous SSR according to the criteria of torsional stability and fatigue loss-of-life.The Tmaster coordinates the response from multiple TSRs and trips generators selectively.The proposed ＂TSR＋Tmaster＂ scheme is implemented for the Shangdu series-compensated transmission system,of which the operation principle and the protection setting are elaborated in this paper.Since it was put into practice in September 2008,the protection system has experienced various field tests and real system faults,demonstrating its effectiveness in detecting subsynchronous vibration and protecting generator shafts.

关 键 词：次同步谐振(SSR) 扭应力继电器(TSR) 轴系扭振保护 串补输电系统 现场试验 

分 类 号：TM774[电气工程—电力系统及自动化]