交联聚乙烯电缆绝缘在线监测系统的研究与开发

发布时间：2017-12-27 16:58

本文关键词：交联聚乙烯电缆绝缘在线监测系统的研究与开发　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着电网大量应用交联聚乙烯电缆,其故障率逐渐上升,影响了电网的安全、可靠及稳定性。研究发现,电力电缆的绝缘性能是影响其运行可靠性的一个重要因素。运行过程中的局部放电,电树枝,水树等都会导致电缆绝缘劣化。因此,开展XLPE电缆绝缘在线监测工作具有重大的经济意义和社会意义。首先,本论文分析了目前国内离线预防性测试进行XLPE绝缘诊断的优缺点,该方法虽然运用较普遍,但其技术较被动,在XLPE的诊断过程中存在很大局限,已远远不能满足日趋严格的XLPE故障检测要求。有必要开展新的电力电缆在线监测方法和设备。本文从工作原理、软硬件设计等方法详细阐释了所研制的XLPE电缆局部放电在线监测系统,经过实际运行验证,本系统运行效果良好,可以较好的在线综合分析评估XLPE电缆的绝缘情况。局部放电电磁耦合法是XLPE电缆在线监测和诊断的常用技术,具有可靠性高、灵敏度强的特点,基于此本系统中重点运用了该方法;其次,本文从软件设计、硬件设计方面进行了详细说明;通过现场试验评估系统的运行状况,进行综合分析评判。最后对研发的XLPE电缆局部放电在线监测系统进行归纳总结,并指出需要改进和继续研发计划。
[Abstract]:With the use of a large number of crosslinked polyethylene cables, the failure rate of the power grid has increased gradually, which affects the safety, reliability and stability of the power grid. It is found that the insulation performance of power cable is an important factor affecting the reliability of the power cable. Partial discharge, in the operation process of electrical tree, water will cause the deterioration of cable insulation. Therefore, it is of great economic and social significance to carry out the on-line monitoring of XLPE cable insulation. First, this paper analyzes the current domestic off-line preventive test the advantages and disadvantages of XLPE insulation diagnosis, although this method widely used, but its technology is passive, there is a big limitation in the diagnosis of XLPE, can not meet the increasingly stringent requirements of XLPE fault detection. It is necessary to carry out new on-line monitoring methods and equipment for power cable. In this paper, the on-line monitoring system for partial discharge of XLPE cable is explained in detail from the aspects of working principle and software and hardware design. After actual operation, it is proved that the system works well, and it can better comprehensively analyze and evaluate the insulation condition of XLPE cable online. Partial discharge electromagnetic coupling is a common technique for XLPE cable on-line monitoring and diagnosis, has the characteristics of high reliability and sensitivity, this system mainly uses the method based on; secondly, this paper gives a detailed description from the aspects of software design and hardware design; through the operation condition field test evaluation system, comprehensive evaluation and analysis. Finally, the research and development of XLPE cable partial discharge on-line monitoring system is summarized, and the need to improve and continue the research and development plan.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM855

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