基于状态检测技术的高压电缆运维管理应用研究

发布时间：2018-04-25 06:15

本文选题：高压电缆 + 状态检测　；参考：《华北电力大学(北京)》2016年硕士论文

【摘要】：电缆是当今可靠、稳定的一种输电介质,由上世纪60年代初期引入中国。发展到现在从油浸纸绝缘电缆占主导,逐渐演化为交联聚乙烯绝缘材质的电缆占位主要地位,主要体现在供电安全可靠、美化城市、安装方便、绝缘性强以及制造简单等。截止至2015年底,北京地区35kV及以上电压等级电缆线路共计755路1897.216公里,并且以每年惊人的速度增加。电网中的新电缆公里数逐年增加。经济持续发展,社会不断进步,生产生活的各个方面对电力使用的需求越来越大,高压电缆作为电力系统中主要支撑设备,它运行情况是否安全可靠越来越受到重视,其运行的安全可靠与否则是电网系统能否正常的投入使用的决定因素。一些长时间运行的老电缆的绝缘的老化情况究竟怎样,何时需要进行更换的问题亟待解决,而常规的预试方法无法进行这些问题的评价。本文通过学习、吸收国内外管理经验,改进传统运维管理的工作模式,利用多种电缆状态检测技术的方法,开展了电缆设备状态检测,包括电缆本体温度、负荷、接地电流、局部放电,以及电缆敷设环境的种种状态参数,并逐渐形成了一套强大的运维管理体系,并对现有设备进行状态评估。运用运维管理体系可以及时发现运行中电缆故障隐患,减少意外停电事故的发生。利用状态检测或监测所得到的数据,电缆的运行状况进行综合评估,为资产管理提供决策参考。综合看来,这种应用可以推动计划检修向状态检修的转变,减少停电次数和停电带来的经济损失,提高电网的可靠性,尤其对高电压等级的主网主系统电缆而言,有利于整个系统的安全、稳定、经济运行。
[Abstract]:Cable is a reliable and stable transmission medium which was introduced into China in the early 1960s. The development of oil-impregnated paper insulated cables has become the main position of XLPE insulation cables, which is mainly reflected in the safety and reliability of power supply, beautification of the city, easy installation, strong insulation and simple manufacturing. By the end of 2015, 35kV and above cable lines in Beijing totaled 1897.216 kilometers, increasing at an alarming rate every year. The number of new cable kilometers in the power grid is increasing year by year. With the continuous development of economy and progress of society, the demand for electric power in all aspects of production and life is increasing. As the main supporting equipment in power system, the safety and reliability of HV cable is paid more and more attention to. The safety and reliability of its operation or not is the decisive factor whether the power system can be put into operation normally. The problems of insulation aging of some long-running old cables and when they need to be replaced need to be solved urgently, but the conventional pre-test methods cannot evaluate these problems. Through studying, absorbing management experience at home and abroad, improving the working mode of traditional operation and maintenance management, using various methods of cable condition detection, this paper carried out cable equipment condition detection, including cable body temperature, load, grounding current, etc. Partial discharge (PD) and various state parameters of cable laying environment have gradually formed a powerful operation and maintenance management system and evaluated the status of existing equipment. The operation and maintenance management system can be used to detect the hidden trouble of cable in operation and reduce the occurrence of accidental power outage. Using the data obtained from state detection or monitoring, the operation of the cable is evaluated synthetically to provide a reference for asset management. In general, this application can promote the transition from planned maintenance to condition-based maintenance, reduce the number of power outages and economic losses caused by blackouts, and improve the reliability of the power network, especially for the main system cables with high voltage levels. It is beneficial to the safety, stability and economic operation of the whole system.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM75

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