CN210005600U - Stray current simulation experiment system of subway direct current traction power supply system - Google Patents
Stray current simulation experiment system of subway direct current traction power supply system Download PDFInfo
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- CN210005600U CN210005600U CN201920269805.4U CN201920269805U CN210005600U CN 210005600 U CN210005600 U CN 210005600U CN 201920269805 U CN201920269805 U CN 201920269805U CN 210005600 U CN210005600 U CN 210005600U
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Abstract
stray current simulation experiment system of subway DC traction power supply system comprises an insulation box, a structural reinforcing mesh arranged in the middle of the insulation box, a model drainage mesh arranged in the middle upper part of the insulation box, an annular steel rail arranged on the upper part of the model drainage mesh, a model locomotive arranged on the steel rail, a pantograph on the model locomotive connected with the annular contact net in a sliding mode, a medium for simulating a foundation filled in the insulation box below the model drainage mesh, a plurality of conducting strips plugged between the steel rail and the model drainage mesh, the contact net and the steel rail respectively connected with the positive pole and the negative pole of a DC stabilized power supply, and miniature current sensors distributed on the steel rail and the contact net and electrically connected with a central processing unit.
Description
Technical Field
The utility model relates to a stray current simulation experiment system of subway direct current traction power supply system.
Background
The subway traction power supply system generally adopts a direct current power supply mode and takes power from a contact net or a third rail as a subway train with a mobile load. Since the rails cannot be completely insulated from ground, complex current paths are formed with the underground and surrounding structures, and currents distributed outside the expected return paths, i.e., stray currents, are generated. The existence of stray current not only increases the electric energy loss of the subway traction power supply system, but also accelerates the corrosion to underground and peripheral facilities of the subway, and increases the operation cost of the subway and the maintenance cost of facilities near the subway.
And current traction power supply system experimental apparatus only includes the system architecture more than ground usually, is difficult to carry out the observation analysis to subway direct current traction power supply system's stray current, and then can't provide the experimental basis for subway direct current traction power supply system's stray current protection design, construction and maintenance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing kinds of subway direct current pulls stray current simulation experiment system of power supply system, this system can carry out the simulation experiment to the stray current that the subway operation in-process of direct current traction power supply produced to obtain the mutual relation between underground structure and stray current on the ground such as contact net, rail, ground condition, and then for the stray current protection design of subway direct current traction power supply system, construction and maintenance provide the experimental foundation, in order to reduce the loss of electric energy, reduce the corrosion loss to structures such as nearby pipeline, the maintenance of facility near the subway, the maintenance cost.
The utility model discloses realize that the technical scheme that its invention purpose adopted is, subway direct current pulls power supply system's stray current simulation experiment system, and its constitution is:
the bottom plate of the insulating box is provided with more than four insulating struts, the middle parts of the insulating struts are connected with a horizontal structural reinforcing mesh, and the top parts of the insulating struts are fixed with a model drainage mesh;
the upper part of the model drainage net is provided with an annular steel rail through an insulating sleeper, a model locomotive is arranged on the steel rail, a pantograph on the model locomotive is connected with an annular contact net in a sliding manner, and the contact net is fixed on the model drainage net through an insulating bracket; a medium for simulating a foundation is filled in the part below the model drainage net in the insulation box; a plurality of conducting strips are plugged between the steel rail and the model drainage net;
the contact net and the steel rail are respectively and electrically connected with the anode and the cathode of the direct current stabilized voltage power supply; miniature current sensors are uniformly distributed on the steel rail and the contact net and are electrically connected with the central processing unit.
The utility model discloses a working process and application method are:
A. adjusting the number and the positions of the conducting strips to simulate the situation that the insulating property of the subway steel rail is reduced at different positions;
B. starting a direct current stabilized power supply, wherein current forms a loop through a contact net, a pantograph, a model locomotive and a steel rail, the model locomotive acquires direct current electric energy and drives wheels to rotate, and the model locomotive runs on the annular steel rail; during operation, the micro current sensor collects currents of different positions of the contact net and the steel rail in real time, and sends the currents to the central processing unit for processing, obtaining and displaying, and distributing stray currents in real time.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a direct current regulated power supply simulation is drawn the power supply institute to the locomotive power supply, through the number and the position of adjustment conducting strip to the condition that the insulating properties of simulation subway rail reduces at different positions to at the power supply in-process of locomotive operation, miniature current sensor gathers the electric current of contact net and rail difference department in real time, according to the size and the distribution of these electric currents, the analysis calculates real-time stray current distribution, and then reachs the relation of the position that insulating properties reduced and stray current's size and distribution of rail emergence.
And secondly, filling different media into the insulating box, and simulating the relationship between different earth surface conditions and the magnitude and distribution of the stray current.
And thirdly, replacing the contact network, the model drainage network, the steel bar structure network and the insulating support made of different materials, and simulating and testing the relationship between the sizes and the distribution of the stray currents of the underground overground and underground structures such as the contact network, the model drainage network, the steel bar structure network and the insulating support made of different materials.
Fourth, the utility model discloses an experimental system has adopted annular rail, can realize the long distance incessant traveling of subway train with little space simulation.
In a word, the utility model discloses can be simply, simulation experiment go out the ground underground structure such as earth's surface condition, contact net, rail, drainage net and the interrelatedness between stray current, and then for the stray current protection design of subway direct current traction power supply system, construction and maintenance provide the experiment foundation to reduce the loss of electric energy, reduce the corruption to near pipeline isotructure, reduce near the maintenance of facility near the subway, maintenance cost.
step, the utility model discloses a be provided with the section switch on the contact net, annular rail is provided with the insulating festival.
Therefore, the utility model discloses an experiment system can carry out the simulation experiment to long distance subway direct current traction power supply system, has improved experiment system's application scope.
The present invention will be described in further detail in with reference to the following drawings and specific examples.
Drawings
Fig. 1 is a perspective three-dimensional structure diagram of the embodiment of the present invention when the medium is not filled.
Detailed Description
Examples
Fig. 1 shows that specific embodiments of the present invention are, stray current simulation experiment system of the dc traction power supply system for subway, which comprises:
the bottom plate of the insulating box 1 is provided with more than four insulating struts 10, the middle parts of the insulating struts 10 are connected with a horizontal structural reinforcing mesh 11, and the top parts of the insulating struts 10 are fixed with a model drainage mesh 12;
an annular steel rail 5 is arranged at the upper part of the model drainage net 12 through an insulating sleeper 6, a model locomotive 4 is arranged on the steel rail 5, a pantograph 3 on the model locomotive 4 is connected with an annular contact net 2 in a sliding manner, and the contact net 2 is fixed on the model drainage net 12 through an insulating bracket 7; a medium for simulating a foundation is filled in the part below the model drainage net 12 in the insulation box 1; a plurality of conducting strips 17 are plugged between the steel rail 5 and the model drainage net 12;
the contact net 2 and the steel rail 5 are respectively and electrically connected with the anode and the cathode of a direct current stabilized voltage power supply 13; miniature current sensors are uniformly distributed on the steel rail 5 and the contact net 2 and are electrically connected with the central processing unit.
The contact net 2 of this example is provided with a section switch 8, and the annular steel rail 5 is provided with an insulating joint 9.
A method for carrying out stray current simulation experiments by using the stray current simulation experiment system of the subway direct current traction power supply system comprises the following operation steps:
A. adjusting the number and the positions of the conducting strips 17 to simulate the situation that the insulating property of the subway steel rail is reduced at different positions;
B. starting a direct current stabilized voltage power supply 13, wherein current forms a loop through a contact net 2, a pantograph 3, a model locomotive 4 and a steel rail 5, the model locomotive 4 obtains direct current electric energy to drive wheels to rotate, and the model locomotive 4 runs on the annular steel rail 5; during the operation, the micro current sensor collects the currents of different positions of the contact net 2 and the steel rail 5 in real time, and sends the currents to the central processing unit for processing, obtaining and displaying, and distributing the stray currents in real time.
Claims (2)
1, kinds of subway direct current pulls stray current simulation experiment system of power supply system, characterized by:
the bottom plate of the insulating box (1) is provided with more than four insulating struts (10), the middle parts of the insulating struts (10) are connected with a horizontal structural reinforcing mesh (11), and the top parts of the insulating struts (10) are fixed with a model drainage mesh (12);
an annular steel rail (5) is arranged at the upper part of the model drainage net (12) through an insulating sleeper (6), a model locomotive (4) is arranged on the steel rail (5), a pantograph (3) on the model locomotive (4) is connected with an annular contact net (2) in a sliding manner, and the contact net (2) is fixed on the model drainage net (12) through an insulating bracket (7); a medium for simulating a foundation is filled in the part below the model drainage net (12) in the insulation box (1); a plurality of conducting strips (17) are plugged between the steel rail (5) and the model drainage net (12);
the contact net (2) and the steel rail (5) are respectively and electrically connected with the anode and the cathode of a direct current stabilized voltage power supply (13); miniature current sensors are uniformly distributed on the steel rail (5) and the contact net (2), and the miniature current sensors are electrically connected with the central processing unit.
2. The stray current simulation experiment system of subway direct current traction power supply systems according to claim 1, wherein a section switch (8) is arranged on the overhead line system (2), and an insulating joint (9) is arranged on the annular steel rail (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920269805.4U CN210005600U (en) | 2019-03-04 | 2019-03-04 | Stray current simulation experiment system of subway direct current traction power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920269805.4U CN210005600U (en) | 2019-03-04 | 2019-03-04 | Stray current simulation experiment system of subway direct current traction power supply system |
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| CN210005600U true CN210005600U (en) | 2020-01-31 |
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| CN201920269805.4U Active CN210005600U (en) | 2019-03-04 | 2019-03-04 | Stray current simulation experiment system of subway direct current traction power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932589A (en) * | 2019-03-04 | 2019-06-25 | 西南交通大学 | The stray electrical current experimental system for simulating and method of Subway DC Traction |
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2019
- 2019-03-04 CN CN201920269805.4U patent/CN210005600U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932589A (en) * | 2019-03-04 | 2019-06-25 | 西南交通大学 | The stray electrical current experimental system for simulating and method of Subway DC Traction |
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