矿用橡套屏蔽电缆绝缘不平衡对杂散电流分布的影响

在分析煤矿交流杂散电流产生机理的基础上,以矿用橡套屏蔽电缆为研究对象,建立了交流杂散电流分布参数模型,并通过理论计算与Matlab仿真分析以及RTDS实时仿真验证,研究了交流杂散电流沿着电缆长度方向的分布规律,总结了屏蔽电缆相间绝缘参数不平衡对交流杂散电流的影响。结果表明：沿着屏蔽电缆长度方向,流经屏蔽层、金属网的交流杂散电流有效值都先减小再增大,且在线路中点处均达到最小值;当电缆的相间绝缘电阻或分布电容不平衡度增大时,流经屏蔽层与金属网的交流杂散电流有效值均整体增大,不平衡系数K从1.25变为3,其增幅达到了10倍左右。...

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Bibliographic Details
Published in煤炭学报 Vol. 42; no. 6; pp. 1614 - 1619
Main Author 庞丹 耿蒲龙 田慕琴 宋建成 杜亚昆 李鑫 呼守信
Format Journal Article
LanguageChinese
Published 2017
Subjects
交流杂散电流
分布规律
数学模型
矿用橡套屏蔽电缆
绝缘不平衡
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Summary:在分析煤矿交流杂散电流产生机理的基础上,以矿用橡套屏蔽电缆为研究对象,建立了交流杂散电流分布参数模型,并通过理论计算与Matlab仿真分析以及RTDS实时仿真验证,研究了交流杂散电流沿着电缆长度方向的分布规律,总结了屏蔽电缆相间绝缘参数不平衡对交流杂散电流的影响。结果表明：沿着屏蔽电缆长度方向,流经屏蔽层、金属网的交流杂散电流有效值都先减小再增大,且在线路中点处均达到最小值;当电缆的相间绝缘电阻或分布电容不平衡度增大时,流经屏蔽层与金属网的交流杂散电流有效值均整体增大,不平衡系数K从1.25变为3,其增幅达到了10倍左右。
Bibliography:PANG Dan1,2 GENG Pu-long1,2, TIAN Mu-qin1,2, SONG Jian-cheng1,2, DU Ya-kun1,2, LI Xin3, HU Sh0u-xin4 （ 1. National ＆ Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Taiyuan University of Technology, Taiyuan 030024, China ; 2. Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China ; 3. Sihe Coal Mine, Shanxi Jineheng Anthracite Mining Group Co. , Ltd. , Jincheng 048000, China ; 4. Taiyuan Research Institute Co. ,Ltd. , China Coal Tech- nology and Engineering Group, Taiyuan 030006, China）
Taking the mining rubber-sheathed shielded cable as an example, the distributed parameter model for AC stray current was put forward according to analysis of the mechanism of AC stray current. Moreover, this paper presen- ted the distribution law of AC stray current along the length direction of the cable, and discussed the influence of the unbalanced insulation of the cable on AC stray current through t
ISSN:0253-9993