摘要
在云广直流输电工程HY12换流变压器阀侧绕组交流外施耐压带局部放电测量试验中,发现其2.1套管放电超标。基于阀侧绕组在绝缘试验过程中的场域分布和试验加压过程数据,分析了局部放电回路,结论为:局部放电超标是由于2.1套管内部局部放电造成。采取更换2.1套管的措施后,成功地通过了试验。
Excessive discharge has been found in the 2.1 bushing at the valve side of HY12 converter transformer in Yunnan-Guangdong UHVDC project during the AC withstand voltage test and partial discharge test.Based on the field distribution of the valve-side winding in the insulation test and the test data of pressurization process,this paper analyzes the partial discharge circuit and concludes that the excessive discharge is due to the inside partial discharge of 2.1 bushing.Then with the measure of replacing the 2.1 bushing the tests are successfully carried out.
出处
《南方电网技术》
2011年第4期29-31,共3页
Southern Power System Technology
关键词
换流变压器
阀侧绕组
局部放电
套管
converter transformer
valve-side winding
partial discharge
bushing
