基于静稳极限阻抗圆的新型自适应失磁保护研究  

Novel Adaptive Loss-of-Excitation Protection Criterion Based on Impedance Circle of Steady-State Stability Limit

作　　者：刘亚东[1] 王增平[1] 武朝强[2] 屠黎明[3] 郑涛[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]中国电力科学研究院,北京100192 [3]北京四方继保自动化股份有限公司,北京100085

出　　处：《华东电力》2014年第1期106-110,共5页East China Electric Power

基　　金：国家重点基础研究发展计划项目(2012CB215200);国家电网公司科技项目~~

摘　　要：提出了一种基于静稳极限阻抗圆的新型失磁保护判据,新判据能自适应负荷的变化。再综合一些防止非失磁工况影响的闭锁措施,提出了新的自适应失磁保护方案。新保护方案能在各种失磁和非失磁工况下正确、可靠动作。仿真结果证明了新的自适应失磁保护方案的有效性。This paper presents a novel loss-of-excitation （LOE） protection criterion based on the impedance circle of steady-state stability limit （SSSL）, which can automatically adapt to the change of system operating modes. In com-bination with some blocking measures to prevent the influence of non-LOE working condition, a new adaptive LOE protection scheme is proposed, which can correctly and reliably operate in both LOE and non-LOE working condi-tions. Simulation results demonstrate the effectiveness of the proposed scheme.

关 键 词：发电机保护 失磁保护 静稳极限阻抗圆 自适应失磁保护 

分 类 号：TM341[电气工程—电机]