电工技术学报2016，Vol.31Issue(10)：59-67,9.
交直流复合电场中油纸绝缘沿面放电现象及特征
The Phenomena and Characteristics of Oil-Paper Insulation Surface Discharge Under AC and DC Voltage
摘要
Abstract
Surface discharge in oil-paper insulation is a common defect in converter transformer. Because of the complex operation conditions in converter transformer, the occurrence likelihood of surface discharge increases. It is important to understand the phenomena and characteristics of surface discharge in oil-paper insulation for fault diagnosis of converter transformer. But the electric field in converter transformer is AC-DC combined electric field, which is quite different from AC voltage. So this article built an oil-paper insulation surface partial discharge detection platform under AC-DC combined voltage, and then analyzed the trend of partial discharge characteristics, at last divided the severity classification according to the characteristics of discharge and dissolved gas analysis (DGA). The diagnosis method under AC voltage has certain applicability under AC-DC combined voltage.These characteristics on partial discharge and DGA could be the foundations of fault diagnosis for converter transformer.关键词
换流变压器/交直流复合电压/沿面放电/状态评估/故障诊断/局部放电/油中溶解气体分析Key words
Converter transformer/AC-DC combined voltage/surface discharge/condition assessment/fault diagnosis/partial discharge/dissolved gas analysis分类
信息技术与安全科学引用本文复制引用
齐波,魏振,李成榕,苑清,高怡,张晓涵..交直流复合电场中油纸绝缘沿面放电现象及特征[J].电工技术学报,2016,31(10):59-67,9.基金项目
国家自然科学基金资助项目(51477052、51337003). （51477052、51337003）
