电气化铁道牵引网故障测距装置的研究
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摘要
牵引网的精确故障定位,有助于及时修复故障线路,减轻维护人员体力劳动,对铁路安全经济运营具有十分重要的意义。但由于受技术条件的制约,至今还缺少高可靠高精度的故障定位装置。本文分析总结了现有的国内外故障定位的理论与技术以及存在的问题,并在此基础上提出了基于分布参数的牵引网故障测距原理。
    本文结合电气化铁道供电系统特点,提出了基于谐波分量的协调控制测距方法,克服了牵引网线路过短而造成的影响;针对牵引负荷特点,提出了数据处理的新思路,即系统正常运行时,用差分傅氏算法处理数据,以满足装置启动对实时性的要求,故障后,采用最小二乘方算法处理数据,以满足装置定位对精度的要求;针对复线牵引网的多种运行方式,引入了开关量信息和故障附加信息进行运行方式识别,并建立了相应的测距方程式。此外,还采用TI公司的TMS320VC33作为装置主微处理器,选用C语言编程设计实现了基于分布参数的牵引网故障测距装置。
Locating the fault accurately and timely can not only contribute to restore the fault traction line and relieve the intension of surfaceman, but also be propitious to improve the reliability and safety of the railway. But for the limitation of technology condition, there is not a fault locator with high accuracy and high reliability. Based on the comprehensive analysis of the application status and the existed problem of traction line fault location, the thesis present a new fault locator principle based on distributed parameter.
    The dissertation combine the specialty of supply system of electrization railway and present a new harmonized-control method for fault location that overcome the influence the length of traction line, the method make use of harmonic component. Then the paper bring forward the special way of data processing that adopt the difference Fourier’s algorithm to process data in the normal condition in order to meet with the demand for time and use least square algorithm to process fault data in order to meet with the demand for precision. At last we judge the operation mode of duplicate-traction line and set up the fault location model based on information of switch status and appended fault information. Moreover we develop a new fault locator for traction line based on distributed parameter. The microprocessor of the device selects TMS320VC33 that is made by Texas Instrument and the compiled language uses standard ANSI C.
                 LiHongGang(High Voltage & Insulation Technology )
    Directed by prof. Quan Yu Sheng
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