CAJ | 학술논문

分析了变频牵引电机绞线对经热老化、电老化及电热联合老化后的3条介损-电压曲线(tanδ-U曲线),与其在高温下的tanδ-U曲线进行对比,并比较了绞线对在不同老化程度下的tanδ-U曲线.结果表明:绞线对经热老化及电热联合老化后测得的第1条tanδ-U曲线的转折点对应的电压明显比后2条tanδ-U曲线的高;经验证该转折电压为绞线对的局部放电起始放电电压(PDIV);随着老化程度的加深,测得的第1条tanδ-U曲线的转折点电压增大.
분석료변빈견인전궤교선대경열노화、전노화급전열연합노화후적3조개손-전압곡선(tanδ-U곡선),여기재고온하적tanδ-U곡선진행대비,병비교료교선대재불동노화정도하적tanδ-U곡선.결과표명:교선대경열노화급전열연합노화후측득적제1조tanδ-U곡선적전절점대응적전압명현비후2조tanδ-U곡선적고;경험증해전절전압위교선대적국부방전기시방전전압(PDIV);수착노화정도적가심,측득적제1조tanδ-U곡선적전절점전압증대.
Three dielectric loss-voltage(tanδ-U) curves of inverter-fed traction motor twisted pair after expe-riencing thermal aging, electrical aging and electrical-thermal aging were tested separately; and then com-pared with the tanδ-U curve tested under high temperature. The tanδ-U curves of the twisted pair under different aging degrees were also tested. The results show that the corresponding voltage of turning point in the first tanδ-U curve is obvious larger than that of the latter two tanδ-U curves of the twisted pairs after thermal aging and electrical-thermal aging. It is verified that the corresponding voltage of turning point is the partial discharge inception voltage(PDIV) of the twisted pair. With the deepening of the ag-ing degree, the corresponding voltage of turning point in the first tanδ-U curve increases.