基于行波测距与雷电定位系统信息融合的雷击故障识别

发布时间：2018-06-29 12:00

本文选题：行波测距 + 雷电定位系统　；参考：《昆明理工大学》2014年硕士论文

【摘要】：高压输电线路往往担负着很大的输送电能任务,跨域大,距离长,地形复杂。统计数据表明,雷击跳闸一直是影响线路安全稳定运行的最主要因素,因此,准确获得线路故障位置,正确判断雷击故障类型,有利于快速查找故障点,减轻巡线工作量,针对性地改进线路防雷,减少线路雷击跳闸率,提高输电可靠性。行波测距技术有助于快速、准确地确定线路故障位置,但行波波头捕捉易受干扰、可靠性差,测距结果不稳定、离度大,对不同性质的故障适应性不强,自动化分析程度低等缺陷进一步暴露,亟待深入研究和解决。雷电定位系统可测量雷击的位置与时间,对于输电线路的防雷具有重要意义,然而由于它测量精度受地形影响较大,因此,雷电定位系统无法准确判断雷击是否击中输电线路或杆塔。目前,现场运维人员得到行波测距结果后通过WEB查询雷电定位系统雷击数据,根据查询结果及经验判断故障是否为雷击故障。这种方法其主观性太强且忽略了电气量故障数据的波形特征,此方法得出的结论的可信度较低,不能准确判别雷击故障与非雷击故障。因此,深入分析并提取二者数据中的有效信息、探索二者的结合方式以及得出准确的故障类型判据,将有助于判别雷击故障和非雷击故障。
[Abstract]:High-voltage transmission lines often shoulder the task of transmitting electric energy, cross-domain large, long distance, complex terrain. The statistical data show that lightning tripping has always been the most important factor affecting the safe and stable operation of the line. Therefore, obtaining the fault location of the line accurately and correctly judging the type of the lightning strike fault can help to find the fault point quickly and reduce the work load of the line patrol. The lightning protection of transmission line is improved, the lightning tripping rate is reduced, and the transmission reliability is improved. Traveling wave location technology is helpful to determine the fault location of line quickly and accurately, but the traveling wave head capture is easy to be disturbed, the reliability is poor, the location result is unstable, the degree of deviation is large, and the fault adaptability to different properties is not strong. The low degree of automation analysis and other defects further exposed, need to be further studied and resolved. The location and time of lightning strike can be measured by lightning location system, which is of great significance to the lightning protection of transmission line. However, the accuracy of lightning location is greatly affected by the topography. Lightning location system can not accurately determine whether lightning strikes transmission lines or tower. At present, after the operator gets the traveling wave location result, the lightning strike data of the lightning location system is queried by the Web, and the lightning strike fault is judged according to the query result and experience. This method is too subjective and neglects the waveform characteristics of electrical fault data. The conclusion of this method is not reliable and can not accurately distinguish the lightning fault from the non-lightning fault. Therefore, it is helpful to analyze and extract the effective information from the two data, to explore the combination of the two and to obtain the accurate criterion of the fault type, which will help to distinguish the lightning strike fault from the non-lightning strike fault.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM863

【参考文献】