Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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干式变压器匝间短路引起的调相机跳闸故障分析

来源:电工电气发布时间:2019-12-18 10:18 浏览次数:508
干式变压器匝间短路引起的调相机跳闸故障分析
 
张钰1,杨晓慧2,赵凯强1
(1 江苏方天电力技术有限公司,江苏 南京 211102;2 中国能源建设集团江苏省电力设计院有限公司,江苏 南京 211102)
 
    摘 要:介绍了一起特高压换流站调相机励磁系统的一台小型干式变压器匝间短路故障引起的机组跳闸事件。分析了保护动作情况及现场设备检查情况,通过对故障变压器进行相关测试及返厂解体检查,得出此次调相机组跳闸故障的直接原因是励磁系统内同步变压器绕组匝间短路故障,提出了对后续投运的调相机系统相关设备在出厂、调试、运行等方面建议,为特高压交直流系统旋转设备安装调试、验收、运维、检修提供参考。
    关键词:变压器;匝间短路;调相机;转子接地
    中图分类号:TM412     文献标识码:B     文章编号:1007-3175(2019)12-0042-03
 
Analysis of Synchronous Condenser Tripping Fault Caused by Turn-To-Turn Short Circuit of Dry-Type Transformer
 
ZHANG Yu1, YANG Xiao-hui2, ZHAO Kai-qiang1
(1 Jiangsu Frontier Electric Power Technology Co., Ltd. Nanjing 2111 02, China;
2 China Energy Engineering Group Jiangsu Power Design Institute Co., Ltd, Nanjing 2111 02, China)
 
    Abstract: Introduction was made to a synchronous condenser tripping fault caused by the turn-to-turn short circuit of a small dry-type transformer in extra-high voltage converter substation. This paper analyzed the protective action and field equipment inspection conditions. The fault transformer was carried out the relevant test and strip inspection to find that the immediate cause leading to the synchronous condenser tripping fault was the synchronous transformer winding turn-to-turn short circuit fault. This paper gave some advices of leave factory, debugging and operation etc, which provides references for the installation and debugging, acceptance inspection, operation and maintenance and overhaul of EHV AC/DC system rotating equipment.
    Key words: transformer; turn-to-turn short circuit; synchronous condenser; rotor grounding
 
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