大型发电机定子局部放电在线监测系统的研究  

On-line PD monitoring system development for large generator stator

作　　者：蒋远东[1] 陈庆国[2] 王发兴[3] 谢东[1] 

机构地区：[1]广西电网公司钦州供电局,广西钦州535000 [2]哈尔滨理工大学,黑龙江哈尔滨150040 [3]广西电网公司梧州供电局,广西梧州543002

出　　处：《中国测试技术》2008年第2期127-130,共4页CHINA MEASUREMENT & TESTING TECHNOLOGY

摘　　要：局部放电测量是诊断定子绕组绝缘最为有效的方法的之一。结合以往的科研实践,且基于磁耦合原理及小波去噪技术,研制出了一套大型发电机定子绕组局部放电在线监测系统,该系统具有工作频带宽、抗干扰能力强、灵敏度高等特点。采用高压电机定子绕组对该系统进行测试,测试结果表明,该系统能准确提取出局部放电脉冲的特征量,满足定子绝缘状况诊断的要求。On-line partial discharge （PD） monitoring is one of the most effective methods for winding insulation diagnosis of large generator stator, According to the past research, magnetic coupling mechanism and wavelet denoising technology, a new type on-line PD monitoring system for winding insulation diagnosis of large generator stator was developed. The system has characteristics such as wider band, stronger anti-jamming, higher sensitivity and so on. With high stator winding, the system was tested, and the test results showed that it could extract the characteristic of PD pluses accurately and could satisfy the requirements of stator insulation diagnosis.

关 键 词：在线监测 局部放电 电流传感器 大型发电机 传感器 

分 类 号：TM61[电气工程—电力系统及自动化] TP277[自动化与计算机技术—检测技术与自动化装置]