海底电缆早期短路故障建模与分析  

Modeling and Analysis of Early Short Circuit Fault of Submarine Cable

作　　者：周海峰[1,3] 曾振城 林昌 ZHOU Hai-feng;CENG Zhen-cheng;LIN Chang(Marine Engineering College,Jimei University,Xiamen Fujian 361021,China;School of Mechanical and Electrical Engineering,Putian University,Putian Fujian 351100,China;Key Laboratory of Modem Precision Measurement and Laser Nondestructive Detection Colleges and Universities in Fujian Province,Putian Fujian 351100,China)

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]莆田学院机电工程学院,福建莆田351100 [3]现代精密测量与激光无损检测福建省高校重点实验室,福建莆田351100

出　　处：《计算机仿真》2021年第5期75-79,共5页Computer Simulation

基　　金：国家自然科学基金项目(51179074);福建省自然科学基金(2018J01495);福建省教育厅项目(JT180269);福建省教育厅中青年教师项目(JAT170507,JAT170507(p));莆田市科技局项目(2018RP4002);现代精密测量与激光无损检测福建省高校重点实验室开放课题(B17119);集美大学博士科研启动基金(ZQ2013007)。

摘　　要：针对海底电缆发生早期短路故障的特征,依据交联聚乙烯海底电缆短路故障演化机理并结合早期故障的电气特性,搭建电弧理论的海底电缆线路早期短路故障诊断模型,对海底电缆参数对故障电流的影响进行仿真分析。本文介绍了电弧理论模型,并对海底电缆电弧故障进行建模,以此分析早期海底电缆故障模型。通过分析模型中的海底电缆参数(时间常数,固定电阻,初始电弧长度以及电弧伸展率)对故障电流峰值及其增量变化的影响,验证早期故障电流峰值及其增量受固定电阻和初始电弧长度影响较大,而受时间常数及电弧伸展率影响较小。According to the characteristics of early short circuit fault of submarine cable, the evolution mechanism of short-circuit fault of Cross-linked Polyethylene(XLPE) submarine cable was combined with the electrical characteristics of early fault. The early short-circuit fault diagnosis model of submarine cable line with arc theory was built, and the influence of submarine cable parameters on fault current was simulated and analyzed. The model of arc was introduced, and the arc fault of submarine cable was modeled and analyzed. The model was used to analyze the effects of submarine cable parameters(time constant, fixed resistance, initial arc length, and arc elongation) on the peak value of the fault current and its incremental changes. The experimental results show that the peak value of the early fault current and its increment are greatly affected by the fixed resistance and the initial arc length, but less affected by the time constant and the arc stretch rate.

关 键 词：电弧 海底电缆 早期故障电流 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]