摘要
牵引变压器绝缘状态预防性的离线试验不便发现早期绝缘故障，而绝缘油中微量气体的变化能够较好地反映早期绝缘故障，为了实时反映牵引变压器绝缘油中微量气体的状态，对早期绝缘故障进行及时诊断，必须进行在线监测。实现这一技术措施存在以下几个关键问题：准确提取绝缘油中微量气体信息，解决信息传输中的干扰，信息处理的硬件和诊断软件开发应用。本研究中采用滤膜型传感器来获取被测信息，数字传输和抗干扰编码来消除外界电磁影响，８０９８单片机为主体的硬件装置和基于《ＧＢ７２５２８７变压器油中溶解气体分析和判断导则》的专家诊断系统软件来实现在线监测、控制。
Early insulating faults are not easy to be discovered through preventive off line tests for the insulating status of a traction transformer, but can be accurately represented by the change of the trace gases dissolved in insulating oil. In order to give a real time report about the status of the dissolved trace gases in insulating oil, and timely diagnose the early insulating faults, on line monitoring must be performed. There exist several key problems in taking this technical measure, such as accurately extracting the information of the trace gases dissolved in insulating oil, solving the interference problem in information transmission, and developing and applying the hardware and diagnostic software for information processing. In this paper, the authors use a filter sensor to collect the information to be detected, employ digital transmission and anti interference codes to eliminate electromagnetic influences, and utilize a hardware device with 8098 monolithic computer and an expert diagnostic system which is based on the introductory rule of analysis and judgement for dissolved gases in transformer oil (GB 7252 87)' to realize the on line monitoring and controlling of early insulating faults in traction transformer.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1999年第4期446-451,共6页
Journal of Southwest Jiaotong University
