杜浩,关弘路,玉林威,陈向荣,石广森,钟涵
DU Hao,GUAN Honglu,YU Linwei,CHEN Xiangrong,SHI Guangsen,ZHONG Han

• 1:浙江省电机系统智能控制与变流技术重点实验室(浙江大学)
• 2:杭州龙源电力有限公司

摘要(Abstract)：

采用实体电缆制作了典型气隙缺陷模型,利用脉冲电流法研究不同电压下气隙缺陷的直流局部放电特性。根据不同外施电压下气隙缺陷放电量Q和放电重复率N随时间t变化的图谱,提取出两类典型统计特征H(q)和H(Δt)。结果表明,气隙缺陷的局部放电起始电压为-14.5 kV;气隙缺陷的Q-t图谱呈"山丘"状,放电量Q和放电重复率N随外施电压升高而升高;随着外施电压升高, H(Δt)的偏斜度和峰度值逐渐增大,表明放电密度随外施电压升高而增加。研究结果为直流XLPE输电电缆局部放电研究提供了数据基础和理论依据。
In this paper, a typical void defect model defects is fabricated by using operating cables. Partial discharge(PD) characteristics under DC voltage at different voltages are studied by pulse current method. Two typical statistical characteristics H(q) and H(Δt) are extracted from the t variation patterns of discharge magnitude Q and discharge repetition rate N of void defects under different voltages. The result shows that the PDIV of the void defect is-14.5 kV; the Q-t pattern of void defect is ′hilly′, and the discharge magnitude Q and the discharge repetition rate N increase with the applied voltage; with the increase of applied voltage,the skewness and kurtosis of H(Δt) increase gradually, which is indicating that the discharge density increases with the applied voltage rise. The research result provides data and theoretical basis for partial discharge research of DC XLPE transmission cable.

关键词(KeyWords)： 交联聚乙烯电缆;气隙缺陷;局部放电;直流
cross-linked polyethylene cable;void defect;partial discharge;DC

Abstract:

Keywords:

基金项目(Foundation): 直流输电技术国家重点实验室(南方电网科学研究院有限责任公司)项目(SKLHVDC-2019-KF-18);; 国家重点研发计划资助(2018YFB0904400);; 宁波市“科技创新2025”重大专项;; 浙江大学“百人计划”(自然科学A类)

作者(Author): 杜浩,关弘路,玉林威,陈向荣,石广森,钟涵
DU Hao,GUAN Honglu,YU Linwei,CHEN Xiangrong,SHI Guangsen,ZHONG Han

DOI: 10.19585/j.zjdl.201909013

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