【作者】 周利军；

【导师】 吴广宁；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 随着电气化铁道的发展和高速铁路的兴起，对牵引供电系统的可靠性提出了更高的要求。牵引变压器是整个牵引供电系统中关键设备之一，其运行的持续性和可靠性是铁路运输的安全和盈利的保证。铁路检修部门一直把气相油色谱分析作为判断牵引变压器运行状态的主要依据，但由于分析间隔太长，不能及时发现故障，更不能跟踪牵引变压器的运行状态和故障的发展程度。而且，这种离线检测的手段程序复杂，耗时多。因此，开发一套经济、可靠，能够及时发现牵引变压器内部故障，并跟踪其发展过程的在线监测系统已经迫在眉睫。 DGA在线监测技术在电力变压器的监测中应用比较成熟，它集DGA技术和在线监测的共同优点于一身，能够不间断的检测并且分析变压器油中的溶解气体浓度。论文开发了牵引变压器DGA在线监测系统(TTM-I)，并在分析牵引负荷特点及其对牵引变压器绕组最热点温升带来的影响和牵引变压器内部故障特点的基础上，参考《变压器油中气体分析和故障诊断导则》，研究了牵引变压器在线监测系统的软件算法，并且编写了下位机软件，实现了对牵引变压器故障跟踪。 论文介绍了牵引变压器在线监测系统的设计思想和实现方法。对于整体框架、硬软件主要模块的设计，进行了系统的分析。最后还对整套系统的运行效果进行了试验验证和数据分析。更多还原

【Abstract】 With the growing extent of electrified railways, especially the demand for high-speed railway, it becomes crucial to make traction power supply system more reliable. Traction transformer is a critical element of a traction power supply system. Its reliable and continued performance is key to safe and profitable transportation. The traditional off-line gas chromatogram method is mainly applied to judge the running status of the running traction transformer. But it can’t trail the development of the faulty, and it has much other shortcomings such as complexity of processing. So it is an urgent problem how to development an inexpensive traction transformer on-line monitor, which can find out inner faulty as well as trail it.Combined with the strongpoint of the dissolved gas analysis (DGA) and the on-line monitoring method, the DGA on-line monitoring system for traction transformer is developed able to monitor the dissolved gas in the oil and analyze it without stopping the devices. After analyzing the characteristic of the traction load and the transformer faulty, according to the requirement of the "Guide to the analysis and the diagnosis of gases dissolved in transformer oil", the program is written to find out the faulty and analyzing the developing rate of the faulty.In this thesis, the design ideas and the realization of the DGA monitor are introduced in detail, including the whole structure, the principles of main modules, and the design’ of the hardware and software. In the end, the performances of the whole device are tested and the errors are analyzed.更多还原