A subway/coal mine return track insulation damage position and its transition resistance monitoring method
A transition resistance and potential monitoring technology, which is applied in the directions of grounding resistance measurement, fault location, and optical method testing, etc., to achieve the effect of reasonable cost, convenient and fast layout, and simple structure
Active Publication Date: 2020-03-27
CHINA UNIV OF MINING & TECH
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Problems solved by technology
Therefore, it is urgent to study the precise positioning method of the ground insulation damage position of the return track under the single-side single-locomotive power supply mode. The location method of track-to-ground insulation damage (Liu Jianhua et al., Urban Rail Transit Research, 2015.09), this method needs to inject a traveling wave signal into the return track where the insulation damage occurs, and the traveling wave signal is reflected back to the signal injection position at the location of the insulation damage. According to The time for the signal to go back and forth between the injection location and the location of the insulation damage and the wave velocity of the traveling wave signal realize the location of the location of the insulation damage. The feasibility and accuracy of this method have only been verified by simulation, and further engineering practice is needed to prove
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[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] A kind of subway / coal mine subway / coal mine return track insulation damage position and its transition resistance monitoring method described in the present invention, such as figure 1 shown. Specifically include:
[0022] S1: The return track 1 is connected to the negative pole of the substation 2 through a cable, and the position of the connection point is selected as the reference position 11 .
[0023] S2: install the potential monitoring device 3 at the reference position 11 selected in step S1, and collect the potential data of the reference position 11 at a certain moment; at the same time, install the driving distance monitoring device 5 and the traction current monitoring device 6 on the locomotive 4 to collect a certain The running distance data and traction current data of the locomotive 4 are downloaded in...
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A method for detecting an insulation damage location in a reflux rail of a subway / coal mine and a transition resistance thereof includes the following steps: connecting a reflux rail to a negative electrode of a substation, selecting a location at a connecting point as a reference location, and mounting a potential detection apparatus at the reference location; mounting a travel distance detection apparatus and a traction current detection apparatus on a locomotive, traveling, by the locomotive, to the substation along the reflux rail, where the three detection apparatuses send respectively recorded data to a control unit; and determining, by the control unit, a potential jump from received potential data and a corresponding jump time, and determining a running distance of the locomotive at a jump moment and a total running length of the locomotive, so as to determine a ground insulation damage location.
Description
technical field [0001] The invention belongs to the technical field of track monitoring, and in particular relates to a method for monitoring the insulation damage position and transition resistance of a subway / coal mine return track. Background technique [0002] In the transportation system using DC traction locomotives such as coal mines or subways, DC traction locomotives are one of the main transportation devices required for production and life. The positive pole of the substation is taken and returned to the negative pole of the substation through the return track. Therefore, when the ground insulation of the return track is damaged, part of the traction current will leak from the damaged position of the ground insulation to the ground, thereby forming stray currents in coal mines or subways. The hazards of stray current in coal mines mainly include: causing electric detonators to explode ahead of time, inducing mine gas and dust explosion accidents, corroding underg...
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IPC IPC(8): G01R31/12G01R27/02G01C22/02
CPCG01C22/02G01R27/02G01R31/1218G01R27/20G01R31/008G01R31/08G01R31/085G01R31/52G01R31/12
Inventor 许少毅邢方方李威王禹桥陈瑶薛宏宇
Owner CHINA UNIV OF MINING & TECH