35 kV电缆型集电线路振荡波技术研究  

Research on Oscillating Wave Technology of 35 kV Cable Collecting Line

作　　者：张意 ZHANG Yi(Yunnan Electric Power Technology Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南电力技术有限责任公司,云南昆明650000

出　　处：《电工技术》2021年第15期98-100,共3页Electric Engineering

摘　　要：随着XLPE电力电缆在电力系统中的广泛应用,电缆绝缘性能的测试技术也日趋增多,其中振荡波局放测试技术以良好的等效性、无损性、定位精确等优点在电缆预试、交接及故障查找领域得到广泛应用。但当前国内振荡波测试技术多应用于电网侧,而电源侧少之甚少。以某新能源风电场35 kV电缆型集电线路为研究对象,通过拔出电缆终端肘型头、远近端双端测试、人工波形分析等方法来减小和排除干扰,发现该电缆终端头的确存在缺陷,回波阻抗过大导致振荡波局放测试系统定位不准确。With the wide application of XLPE power cables in power systems,the testing technology of cable insulation performance is also increasing day by day.Among them,the oscillating wave partial discharge testing technology has been widely used in the field of cable pre-testing,handover and fault finding with its advantages of good equivalence,non-destructiveness,and accurate positioning.However,the current domestic oscillatory wave testing technology is mostly applied to the power grid side,while the power side is rarely used.Taking a 35 kV cable-type collector line of a new energy wind farm as the research object,the interference is reduced and eliminated by methods such as pulling out the elbow of the cable terminal,double-ended testing at the far and near ends,and artificial waveform analysis.It was found that the cable terminal had defects,and the echo impedance was too large,resulting in inaccurate positioning of the oscillatory wave partial discharge test system.

关 键 词：35 kV电缆型集电线路 振荡波 局放 

分 类 号：TM866[电气工程—高电压与绝缘技术]