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軌道交通供電系統電纜故障在線(xiàn)定位技術(shù)研究
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西安市軌道交通集團有限公司

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TM93

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Research on on-line cable fault location technology of rail transit power supply system
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    摘要:

    在軌道交通供電系統故障中,電纜故障是比較常見(jiàn)的故障,而在傳統的電力系統中,電纜故障定位技術(shù)主要是通過(guò)離線(xiàn)定位來(lái)完成故障定位工作,導致電纜故障定位誤報率較高。在軌道交通供電系統故障中,電纜故障是比較常見(jiàn)的故障,而在傳統的電力系統中,電纜故障定位技術(shù)主要是通過(guò)離線(xiàn)定位來(lái)完成故障定位工作,導致電纜故障定位誤報率較高。為此設計新型軌道交通供電系統電纜故障在線(xiàn)定位技術(shù)。使用傅里葉變換公式,采集供電系統電壓脈沖,并對異常脈沖進(jìn)行記錄。通過(guò)異常脈沖分析結果與供電系統導體數據變化,完成電纜故障類(lèi)別判定。根據電纜故障類(lèi)別判定結果,采用行波計算法對故障點(diǎn)到電纜端點(diǎn)的距離展開(kāi)計算,完成電纜故障定位。設定電纜故障定位誤差最大值與故障定位技術(shù)實(shí)現平臺,完成高精度電纜故障定位。實(shí)驗結構表明,通過(guò)與傳統定位技術(shù)以及采用其他方式設計的定位技術(shù)相比,此故障定位技術(shù)誤報率較低。由此可知,此方法的定位能力更佳,使用效果更好。

    Abstract:

    In the power supply system fault of rail transit, cable fault is a common fault, while in the traditional power system, cable fault location technology mainly completes the fault location work through off-line location, resulting in high false alarm rate of cable fault location. In the power supply system fault of rail transit, cable fault is a common fault, while in the traditional power system, cable fault location technology mainly completes the fault location work through off-line location, resulting in high false alarm rate of cable fault location. For this reason, a new on-line cable fault location technology for rail transit power supply system is designed. Using the formula of Fourier transform, the voltage pulse of power supply system is collected and the abnormal pulse is recorded. According to the abnormal pulse analysis results and the change of the conductor data of the power supply system, the cable fault category is determined. According to the result of cable fault classification, the distance between the fault point and the cable end point is calculated by traveling wave calculation method to complete the cable fault location. Set the maximum value of cable fault location error and the realization platform of fault location technology to complete high-precision cable fault location. The experimental structure shows that the false alarm rate of this fault location technology is lower than that of traditional location technology and other design methods. It can be seen that the positioning ability of this method is better and the use effect is better.

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馬一博,石勇.軌道交通供電系統電纜故障在線(xiàn)定位技術(shù)研究計算機測量與控制[J].,2021,29(1):20-23.

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歷史
  • 收稿日期:2020-05-15
  • 最后修改日期:2020-06-04
  • 錄用日期:2020-06-04
  • 在線(xiàn)發(fā)布日期: 2021-01-22
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