JD-13型转子两点接地保护误动分析及对策  

ANALYSIS OF MISOPERATION IN JD-13 TYPE OF PROTECTION AGAINST DUAL GROUNDING FAULT OF ROTOR WINDING AND ITS SOLUTION

作　　者：吕永东 张黎 

机构地区：[1]聊城发电厂,山东省聊城市252033 [2]聊城电业局,山东省聊城市252053

出　　处：《电网技术》2002年第2期84-87,共4页Power System Technology

摘　　要：通过对一起保护误动事故进行的理论分析 ,指出 JD-13型发电机两点接地保护装置在设计原理上存在着缺陷 ,不但一点频繁接地时容易发生误动 ,而且 ,在不同位置发生间隔时间很短的瞬间接地时 ,也可能发生误动。针对这一缺陷提出了两种解决方案 ,并通过比较 ,选择了一种恰当的解决方案。试验表明 ,该方案能克服了原设计中的缺陷 ,能满足运行的需要。After the theoretical analysis of a misoperation occurred in JD 13 type of protection against dual grounding fault of rotor winding, it is discovered that there is a defect in the design of the protective device which not only may easily make the device misoperate under rotor winding grounding frequently occurring at the same position, but also under the instantaneous grounding occurring at two different positions with very short time interval. To revise this defect two improvement methods are described in this paper and a suitable one is selected. Test results show that the selected method can correct the defect in the original design of the device and meet the need of operation.

关 键 词：发电机 转子 两点接地保护 误动分析 对策 JD-13型 

分 类 号：TM31[电气工程—电机]