摘要
通过对一台500kV主变压器投运后带电检测过程中,第1天色谱分析数量正常,第4天色谱分析油中出现痕量C_2H_2。油色谱跟踪测试发现A相C_2H_2含量有稳步增长趋势,B、C相未见明显变化。通过高频局部放电测试,发现主变低压侧无功设备投入运行时,铁芯、夹件上均可检出明显的放电信号,且相位上存在180°翻转。利用超声局部放电检测对放电点进行定位,初步判断放电点在铁芯夹件之间的磁屏蔽处。通过解体分析明确缺陷产生的原因,提出处理措施,验证组合检测技术在变压器状态检测的有效性。
Through a 500 k V main transformer after commissioning charged detection process,the first day of the normal number of chromatographic analysis,chromatographic analysis of oil appeared on the fourth day of trace C_2H_2. Oil Chromatography A phase tracking tests found C_2H_2 content has steadily increased,B,C with no significant change. By high-frequency partial discharge test,found the main transformer low voltage side reactive power equipment put into operation,the core,clamps can be detected on a clear discharge signals. Partial discharge detection using ultrasonic positioning point of discharge,the initial judgment in the discharge point at the pieces of the core sandwiched between magnetic shielding. By analyzing the disintegration clear cause of the defects,the proposed action.
出处
《中国测试》
北大核心
2017年第S1期37-41,共5页
China Measurement & Test
关键词
变压器
高频
超声
分析处理
transformer
high frequency
ultrasonic
analysis process
