10kV线路自适应状态诊断系统研究

发布时间：2018-05-14 07:53

本文选题：10kV线路 + 故障诊断　；参考：《华北电力大学(北京)》2016年硕士论文

【摘要】：随着国民经济的不断发展,全社会的用电总量不断增加,电网建设不断增加,电网规模不断扩大,靠故障检测人员徒步开展巡视的陈旧模式已经不再适合电力发展的现况。以故障指示器为基础的故障定位与实时在线监测系统是最容易实施、性价比最高的配电网故障远程定位的工具,基于故障指示器技术的故障在线监测系统就成为了配网故障处理的最基本最实用的解决方案。论文以10kV配电网线路作为研究对象,着重研究并解决小电流接地系统故障快速查找、定位与线路在线检测问题。论文研究具体结合丽江配电网10kV线路自适应诊断系统的设计与开发需求,在发生单相接地故障时,在变电站中性点短时接入一个中电阻,产生一个较大的接地信号电流(电流小于50A),注入故障线路,并通过对现有的故障指示器进行改进,检测出电流信号,实现故障指示功能。论文首先对10kV线路自适应诊断系统进行了功能设计,利用故障指示器技术在配电线路图上实现故障点自动定位、线路的负荷电流值实时采集、电缆线路的温度告警信息等功能,其次对10kV线路自适应诊断系统由远方终端和系统主站的软件和硬件系统进行了分析与设计；最后,在丽江电网开展系统的现场测试工作,试验结果表明,系统能快速准确的在线检测各种接地故障、短路故障、停送电、线路负荷、温度等信息,并将所采集到的特征信息发送到系统主站,大大提高了配电线路故障检测的自动化水平。
[Abstract]:With the development of national economy, the total amount of electricity used in the whole society is increasing, the construction of power grid is increasing, and the scale of power network is expanding. The old mode of walking inspection by fault detection personnel is no longer suitable for the current situation of electric power development. The fault location and real-time on-line monitoring system based on fault indicator is the easiest to implement and the most cost-effective tool for remote fault location in distribution network. On-line fault monitoring system based on fault indicator technology has become the most basic and practical solution for distribution network fault processing. In this paper, the 10kV distribution network line is taken as the research object, and the problems of fast fault finding, location and on-line detection of the low current grounding system are studied and solved emphatically. According to the design and development of 10kV line adaptive diagnosis system in Lijiang distribution network, a medium resistance is connected to the neutral point of substation when the single-phase grounding fault occurs. A large earthing signal current (current less than 50 An) is generated and injected into the fault line. Through improving the existing fault indicator, the current signal is detected and the fault indication function is realized. In this paper, the function of 10kV line adaptive diagnosis system is first designed. The fault indicator technology is used to automatically locate the fault point on the distribution line diagram, the load current value of the line is collected in real time, the temperature alarm information of the cable line and so on. Secondly, the software and hardware system of the 10kV line adaptive diagnosis system is analyzed and designed by the remote terminal and the main station of the system. Finally, the field test work of the system is carried out in Lijiang power grid, and the test results show that, The system can quickly and accurately detect all kinds of ground faults, short circuit faults, stop power transmission, line load, temperature and other information, and send the characteristic information to the main station of the system. The automation level of fault detection of distribution line is greatly improved.
【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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