750 kV变压器现场局部放电试验有关问题分析  

Analysis of On-site Partial-discharge Test on 750 kV Transformers

作　　者：李云阁 施围[2] 张祥全 韩绍周 王煊[3] 万荣兴 宋朝晖 

机构地区：[1]西北电网公司750kV兰州输变电运行工区,甘肃兰州730050 [2]西安交通大学电气工程学院,陕西西安710049 [3]中国电力科学研究院高压研究所,北京100085

出　　处：《高压电器》2007年第6期434-437,共4页High Voltage Apparatus

摘　　要：笔者总结了示范工程中变压器现场局放交接试验的程序、标准、过程,分析了出现的问题,提出如下建议:①提高750 kV变压器的工频试验电压;②不宜反复进行局放试验;③现场试验局放超标时应务实处理;④重新定义局部放电起始电压和熄灭电压;⑤必要时采用可靠的在线监测设备。这些建议不限于750 kV变压器,亦可为1 000 kV变压器的现场交接试验参考。This paper analyzes the problems concerning pro- cedure, standards, and process in the on-site acceptance partial-discharge（PD） test on the 750 kV transformers. Some suggestions are therefore offered as follows：（1）increase the power frequency withstand test voltage for 750 kV transformers; （2）avoid to perform PD test repeatedly;（3）take practical measures if PD quantity exceeds the criterion stated in standard; （4）redefine the PD inception voltage and extinction voltage; （5）use reliable on-line monitoring apparatus when necessary. These suggestions can also serve as a reference for the same test on 1 000 kV transformer.

关 键 词：变压器 局部放电 试验 

分 类 号：TM855[电气工程—高电压与绝缘技术]