Cable Joint Fault Location Method Based on GPS Positioning System
A technology of GPS positioning and GPS locator, applied in the direction of the fault location, etc., can solve the problems of inaccurate synchronization of monitoring point time, difficulty in extracting and processing traveling wave signals, and inability to completely eliminate transition resistance, etc., saving manpower and material resources, and simple structure , The effect of fast positioning speed
Active Publication Date: 2018-10-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
Although the principle of the impedance method is simple, the distance measurement error is large, and the transition resistance cannot be completely eliminated, and it is greatly affected by the fault type and the load impedance of the opposite end of the line.
The traveling wave ranging method is widely used because it is not affected by the fault type and transition resistance, but the uncertainty of the traveling wave signal often makes the extraction and processing of the traveling wave signal very difficult.
In addition, because the time of different monitoring points cannot be precisely synchronized, the traveling wave ranging and positioning method is feasible in principle, but it is difficult to implement in practical applications.
The S injection method can effectively solve the problem that single-phase grounding has no obvious fault characteristics in small current grounding systems, but the measurement results are still affected by factors such as line structure, uneven load, and transformer errors.
The intelligent method combines wavelet transform, neural network, various intelligent algorithms and expert systems to establish an intelligent fault identification and ranging system, but it needs to establish a system information database such as line structure and equipment parameters, which is relatively cumbersome
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[0022] figure 1 , figure 2 Shown, a kind of specific embodiment of the present invention is, a kind of cable joint fault location device based on GPS positioning system, its composition is:
[0023] A computer 1 with a mobile communication module is installed in the railway traction substation, and a GPS locator 2 with a mobile communication module is installed at each joint 3a on the cable 3 along the railway, and the computer 1 receives the GPS locator 2 through its mobile communication module. Signal;
[0024] The power supply of the GPS locator is composed of an induction coil A, a rectifier circuit B, a direct-to-direct conversion circuit C and a storage battery D connected in sequence next to the power through-line.
[0025] The method for locating cable joint faults using the cable joint fault locating device based on the GPS positioning system in this example, the steps are:
[0026] A. Collection of geographical location information of joints:
[0027] The GPS lo...
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The invention discloses a cable joint fault location device based on a GPS positioning system and a location method thereof. The device is composed of: a computer (1) with a mobile communication module installed in a railway traction substation; A GPS locator (2) with a mobile communication module is installed at the joint (3A), and the computer (1) receives the signal from the GPS locator (2) through its mobile communication module; the power supply of the GPS locator is connected by electricity The induction coil (A), rectification circuit (B), direct-direct conversion circuit (C) and storage battery (D) next to the line are connected in sequence to form. The device and the method thereof are simple in principle, low in operation cost, high in positioning accuracy and fast in speed, are not affected by factors such as transition resistance and fault type, and can better ensure the reliability of cable operation.
Description
technical field [0001] The invention relates to a positioning device and a positioning method for a power cable joint fault, in particular to a GPS positioning system-based cable joint fault positioning device and a detection method thereof. Background technique [0002] With the continuous advancement of science and technology, railway electrification projects have also been greatly developed in recent years. In order to ensure the safety of railway transportation, the requirements for the reliability of the power supply cables along the line and the ability to quickly recover from faults are very high. If the power supply is interrupted, it may cause accidents such as train jams, disrupt transportation plans, and even cause huge economic losses. Therefore, it is necessary to carry out online information collection, monitoring, and rapid distance measurement and fixed point after the fault occurs to shorten the fault repair time, restore power supply as soon as possible, an...
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IPC IPC(8): G01R31/08
Inventor林圣温曼越何正友程杰
OwnerSOUTHWEST JIAOTONG UNIV