电测与仪表2024，Vol.61Issue(1)：164-169,6.DOI:10.19753/j.issn1001-1390.2024.01.025
多应力条件下电缆附件局部放电的演变过程
Evolution of partial discharge in cable accessories under multi-stress conditions
摘要
Abstract
The cable accessory interface is a multilayer composite dielectric insulation structure,which is prone to partial discharge(PD)under physical conditions such as temperature,air pressure,and electric field.In order to study the evo-lution process of partial discharge under various stress conditions,a typical knife mark defect is designed in the 10kV ca-ble terminal,and a collaborative aging platform under the multi-stress conditions of"cold and heat load-power frequency voltage-impulse voltage"is built in the laboratory.The platform is used to perform aging test on the cable,and the power frequency partial discharge test platform is used to detect the partial discharge of the cable terminal under different aging periods.The wave method is used to de-noise the partial discharge signals of the cable accessories under different aging stages,and the PD pulses in the partial discharge signals after the de-noising are extracted by the threshold window lift to construct the PRPD spectrum of the partial discharge signals of the cable accessories.The experimental results show that,under the condition of multiple stresses,under different aging degrees,the partial discharge of the knife mark defect cable accessory experiences three"ups and downs"breakdowns,and the discharge amplitude has a multi-stage"increase-de-crease"variation trend.关键词
多应力/电缆附件/局部放电/刀痕缺陷/PRPDKey words
multi-stress/cable accessories/partial discharge/knife mark defect/PRPD分类
信息技术与安全科学引用本文复制引用
李巍巍,朱轲,周凯,叶彬,邓元实,黄永禄..多应力条件下电缆附件局部放电的演变过程[J].电测与仪表,2024,61(1):164-169,6.基金项目
四川省电力公司科技项目(52199718001N) （52199718001N）
