CAJ | 학술논문

为了在电缆终端运行初期检测出其典型安装刀痕缺陷,设计了电缆终端的两种常见刀痕缺陷,并对缺陷的局部放电特征进行了分析.通过电缆附件老化平台模拟真实工况并加速老化,使电缆终端缺陷的局部放电(Partial Discharge,PD)特征更为明显,并使用罗氏线圈传感器获取了不同刀痕缺陷下的PD数据,分析了不同刀痕缺陷的单个放电脉冲波形、放电频谱以及放电相位分布等特征.此外,将这两种缺陷的放电特性进行了对比分析.实验结果表明,不同缺陷下PD的时频特性各有不同;而且在短时间(240 h)老化的情况下,不同刀痕缺陷的放电程度就已表现出明显差异,这些特征可为缺陷识别以及改进电缆终端安装工艺提供依据.
위료재전람종단운행초기검측출기전형안장도흔결함,설계료전람종단적량충상견도흔결함,병대결함적국부방전특정진행료분석.통과전람부건노화평태모의진실공황병가속노화,사전람종단결함적국부방전(Partial Discharge,PD)특정경위명현,병사용라씨선권전감기획취료불동도흔결함하적PD수거,분석료불동도흔결함적단개방전맥충파형、방전빈보이급방전상위분포등특정.차외,장저량충결함적방전특성진행료대비분석.실험결과표명,불동결함하PD적시빈특성각유불동;이차재단시간(240 h)노화적정황하,불동도흔결함적방전정도취이표현출명현차이,저사특정가위결함식별이급개진전람종단안장공예제공의거.
For detecting typical installation of cutting defects in cable terminations, two kinds of common installing cutting defects in cable terminations are previously designed and their PD (Partial Discharge) characteristics are also investigated. In order to expose PD characteristics in real operation conditions, an accelerating aging platform for cable terminations is set up. Moreover, by using a Rogowski coil PD sensor, defects’ PD characteristics including single discharge pulse, frequency spectrum and PRPD (Phase Resolved Partial Discharge) patterns are recorded and analyzed. In addition, PD characteristics of the two kinds of defects are compared. The experimental results show that the two kinds of defects are obviously different in time and frequency domain. Also, the significant differences in discharge strength are observed for the two kinds of defects after a short time (240 hours) aging. These characteristics can be used for recognizing defects and improving installation technique.