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文章摘要
35kV电缆终端常温下两种刀痕的局部放电特性
The Partial Discharge Characteristics for Two Cutting Defects for 35kV Cable Terminations under normal temperature
Received:September 10, 2015  Revised:September 10, 2015
DOI:
中文关键词: 局部放电  电缆终端  幅值相位分布  时频特性  
英文关键词: partial discharge  cable termination  PRPD  time-frequency characteristic
基金项目:
Author NameAffiliationE-mail
gaoyuansheng State Grid Dazhou Electric Corporation 51260996@qq.com 
zhaoqingjie* Sichuan University zhaoqingjie_scu@163.com 
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中文摘要:
      为研究电缆终端主绝缘刀痕缺陷下的局部放电(PD)现象及在不同刀痕缺陷下的局部放电特征,通过电缆附件老化实验平台模拟电缆终端实际运行工况,利用高频电流传感器取终端PD数据,对比分析这两种刀痕缺陷在常温20℃时的幅值相位分布图谱(PRPD)、单次脉冲放电波形、放电量分布图、电场仿真图形及时频(T-F)特性。实验结果表明,在常温下两种不同刀痕缺陷的局部放电特征呈现明显差异。环切刀痕缺陷的单次波形持续时间长于纵切刀痕缺陷,在放电量、放电幅值大小及放电相位分布范围上要高于纵切刀痕缺陷,时频特性也存在明显的差异。通过这些差异可为缺陷的类型判断提供理论依据,并对于提前发现电缆终端安装缺陷保证电缆终端的稳定运行具有非常重要的实际应用价值。
英文摘要:
      In order to investigate the partial discharge (PD) phenomenon of the cable termination and the characteristics under different kinds of cutting defects, the actual working conditions of cable terminal will be simulated through the platform of XLPE cable accessories, furthermore, the experimental data would be acquired by using HFCT (high frequency current transformer). The two cutting defects’ characteristics covering PRPD (Phase Resolved Partial Discharge), single discharge pulse, the figure of discharge capacity, the electric field simulation and T-F characteristic are compared under normal temperature. The experimental results show that the characteristics of PD were significant difference of the two kinds of different cutting defects under the normal temperature, the time of the single waveform for ring-cutting defect is longer than slitting-cutting, and higher on discharge capacity, the amplitude and the phase distribution of PD, there are some significant differences of T-F between them. these will provide the theory basis from the difference, which are very important to discover the defects of cable terminal early and ensure the stable operation of the cable termination.
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