| 引用本文: | 龙望成,高炎辉,关根志,郑良华,朱大铭.交叉互联接线的交联聚乙烯(XLPE)电力电缆绝缘在线监测理论分析[J].电力自动化设备,2008,(3):59-63 |
| .Theoretical analysis of on-line insulation monitoring of crossing-XPLE cable[J].Electric Power Automation Equipment,2008,(3):59-63 |
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| 摘要: |
| 介绍了交叉互联接线的交联聚乙烯(XLPE)电缆运行方式和进行绝缘监测的诊断原理。根据同频率下相量的可结合运算特性,将各交叉节点监测到的电流数据转化为相量值,依据电路连接方式和关系进行运算,直观地得到各段线路的泄漏电流,从而可以判断交叉互联电缆各段的绝缘状况。对交叉互联接线的XLPE电力电缆的一个标准单元展开分析,通过分析交叉互联电缆安装运行情况,计算出其等值电路,并分析监测各处电流相量合成情况;说明利用相量运算分析方法的理论依据,再利用Matlab进行仿真实验计算,证实了该方法的实用性及可靠性。 |
| 关键词: 相量运算,交叉互联XLPE电缆,绝缘监测,接地线电流法,同步采样 |
| DOI： |
| 分类号:TM247 |
| 基金项目: |
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| Theoretical analysis of on-line insulation monitoring of crossing-XPLE cable |
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LONG Wangcheng GAO Yanhui GUAN Genzhi ZHENG Lianghua ZHU Daming
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| Abstract: |
| The operating modes of crossing-XPLE(Cross Linked Polyethylene) cable and its diag-nostic principle of insulation monitoring are presented. As vectors of same frequency can be combined for calculation,the currents monitored at cross nodes are inverted into vectors and the leakage currents of every segment can be obtained through vector calculation,which are used to monitor their insulation conditions. A standard unit of crossing- XLPE cable is extensively analyzed and its equivalent circuit is calculated according to its installation and operating conditions. The composed current vectors of every segments are monitored and analyzed. The theory of vector calculation is presented. The simulation with Matlab confirms the practicability and reliability of this method. |
| Key words: vector calculation,crossing-XLPE cable,insulation monitoring,grounding current,synchronous sampling |
