文章摘要
桂林,李岩军,詹荣荣,等.大型调相机内部故障特征及纵向3U0保护性能分析研究[J].电力系统自动化. DOI: 10.7500/AEPS20181006001.
gui lin,,, et al.Analysis of Internal Fault Characteristics and Longitudinal Zero-sequence Overvoltage Protection Performance of Large-scale Condenser[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20181006001.
大型调相机内部故障特征及纵向3U0保护性能分析研究
Analysis of Internal Fault Characteristics and Longitudinal Zero-sequence Overvoltage Protection Performance of Large-scale Condenser
DOI:10.7500/AEPS20181006001
关键词: 大型调相机  匝间短路  内部故障分析  纵向3U0保护  裂相横差保护
KeyWords: large-scale condenser  inter-turn short-circuit  internal fault analysis  longitudinal zero-sequence overvoltage protection  split phase transversal differential protection
上网日期:2019-03-14
基金项目:国家电力公司科技项目
作者单位E-mail
桂林 清华大学电机系电力系统及发电设备控制和仿真国家重点实验室 guilin99@mails.tsinghua.edu.cn 
李岩军 中国电力科学研究院有限公司 liyanjun@epri.sgcc.com.cn 
詹荣荣 中国电力科学研究院有限公司 zhanrr@epri.sgcc.com.cn 
牛化敏 清华大学电机系电力系统及发电设备控制和仿真国家重点实验室 niuhuaminsx@163.com 
王祥珩 清华大学电机系电力系统及发电设备控制和仿真国家重点实验室 wangxh@mail.tsinghua.edu.cn 
王维俭 清华大学电机系电力系统及发电设备控制和仿真国家重点实验室 guibinyu2010@163.com 
摘要:
      大型调相机(300Mvar)实际存在定子绕组匝间短路的可能,不装设匝间短路保护或匝间短路保护性能不完善将是调相机安全运行的严重隐患。运用“多回路分析法”,对两种冷却方式大型调相机所有实际可能发生的内部故障进行了仿真分析,分析表明大型调相机现有主保护配置方案(完全纵差保护+纵向3U0保护)存在较大的保护死区,并进一步分析了纵向3U0保护不能动作的故障类型,为后期大型调相机主保护性能的改善提供借鉴。
Abstract:
      Stator winding inter-turn short-circuit may exist in a large condenser (300Mvar), it is a serious hidden danger for the condenser to operate without perfect protection against inter-turn short-circuit. The Multi-Loop analysis method is used to simulate and analyze all possible internal faults of the large condenser of two different cooling modes. The results show that there is a large dead zone in the existing main protection configuration of the large condenser (complete longitudinal differential protection + longitudinal zero-sequence overvoltage protection), and the failure types of longitudinal zero-sequence overvoltage protection is further analyzed, which can provide reference for the performance improvement of the main protection configuration of later large condensers. This work is supported by the State Grid Corporation headquarter science and technology project (Research on fault characteristics, relay protection technology and operation control technology of synchronous condensers).
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