CN110091759B - Ground automatic neutral section passing device and method - Google Patents
Ground automatic neutral section passing device and method Download PDFInfo
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- CN110091759B CN110091759B CN201810097173.8A CN201810097173A CN110091759B CN 110091759 B CN110091759 B CN 110091759B CN 201810097173 A CN201810097173 A CN 201810097173A CN 110091759 B CN110091759 B CN 110091759B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
- B60M3/04—Arrangements for cutting in and out of individual track sections
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Abstract
The invention discloses a ground automatic passing neutral section device, which comprises a train position identification unit and a power supply switching unit, wherein the power supply switching unit comprises a first electronic switch and a second electronic switch, the first electronic switch is connected with a first switch loop in parallel, and the first switch loop comprises a first mechanical switch and a first resistor; the second electronic switch is connected with a second switch loop in parallel, and the second switch loop comprises a second mechanical switch and a second resistor. The invention also correspondingly discloses a method, which comprises the following steps: s01, when the train arrives in front of the neutral zone, closing a first mechanical switch; s02, when the preset position of the neutral zone is reached, turning on a first electronic switch, and then turning off a first mechanical switch; s03, when the neutral zone is at a preset switching position, switching a first electronic switch and a second electronic switch to realize phase change; and S04, when the neutral zone is separated, the second electronic switch is disconnected, and the passing neutral zone is completed. The device and the method have the advantages of reducing electric arcs and the like.
Description
Technical Field
The invention mainly relates to the technical field of passing neutral sections, in particular to a ground automatic passing neutral section device and a ground automatic passing neutral section method.
Background
With the development of electric railways in China and the common application of electric locomotives, a traction power supply system adopts an alternating-current single-phase power frequency phase-change power supply mode, and meanwhile, in order to avoid out-phase short circuit and ensure that the locomotive can smoothly pass through electric phase splitting, an electric phase splitting device is required to be arranged at the 20 th-30 th km of an electric railway contact net, and with the gradual increase of the line traffic and the running speed, overvoltage and electric arc can occur when the electric locomotive passes through articulated electric phase splitting, so that the safe running of the railway is influenced. In order to solve the problem, at the present stage, a ground automatic passing neutral section passing scheme of a power electronic switch, a vehicle-mounted automatic power-off passing neutral section scheme and a column switch automatic power-off scheme are adopted, a neutral section without a neutral section needs to be alternately introduced into power sources of two different power supply arms through a mechanical switch or an electronic switch, and sensorless passing neutral section is realized for current taking of an electric locomotive.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a ground passing neutral section device which is simple in structure and can reduce electric arcs, and correspondingly provides a passing neutral section method which is simple and convenient to operate and can reduce the electric arcs.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a ground automatic neutral section passing device comprises a train position identification unit and a power supply switching unit, wherein the power supply switching unit comprises a first electronic switch and a second electronic switch, one end of the first electronic switch and one end of the second electronic switch are connected and are connected with a neutral zone, and the other ends of the first electronic switch and the second electronic switch are respectively connected with a two-phase power supply arm; the first electronic switch is connected with a first switch loop in parallel, and the first switch loop comprises a first mechanical switch and a first resistor; the second electronic switch is connected with a second switch loop in parallel, and the second switch loop comprises a second mechanical switch and a second resistor.
As a further improvement of the technical scheme:
the first mechanical switch and the second mechanical switch are both circuit breakers.
The train position identification unit comprises a first position sensor, a second position sensor, a third position sensor and a fourth position sensor which are sequentially arranged along the running direction of the train.
The first electronic switch and the second electronic switch are anti-parallel thyristors.
The other ends of the first electronic switch and the second electronic switch are connected with the power supply arm through the circuit breaker and the isolating switch in sequence.
And one ends of the first electronic switch and the second electronic switch are connected and then connected with the neutral zone through the circuit breaker.
The invention also correspondingly discloses a phase passing method based on the ground automatic phase passing device, which comprises the following steps:
s01, in an initial state, the first electronic switch, the second electronic switch, the first mechanical switch and the second mechanical switch are all in an off state; when the train position identification unit detects that the train runs to the front of the neutral zone, the first mechanical switch is controlled to be closed, and when the train runs to the neutral zone, a power supply of the power supply arm enters the neutral zone to supply power to the train after passing through the first mechanical switch and the first resistor;
s02, when the train position recognition unit detects that the train runs to a preset position of a neutral zone, a first electronic switch is turned on, then a first mechanical switch is turned off, and at the moment, a power supply of a power supply arm enters the neutral zone through the first electronic switch to supply power to the train;
s03, when the train position recognition unit detects that the train runs to a preset switching position of a neutral zone, switching a first electronic switch and a second electronic switch to achieve phase change;
and S04, when the train position identification unit detects that the train leaves the neutral zone, disconnecting the second electronic switch to complete passing neutral section.
As a further improvement of the above technical solution:
the train position recognition unit judges the position of the train through a plurality of position sensors arranged in the train traveling direction.
Compared with the prior art, the invention has the advantages that:
according to the ground automatic neutral-section passing device and the ground automatic neutral-section passing method, the mechanical switch and the resistor are connected in parallel on the electronic switch, when a train runs to a neutral area, the mechanical switch is firstly conducted to provide a power supply loop, and after the train runs to the neutral area, the corresponding electronic switch is conducted to supply power; the hard connection between the neutral zone and the power supply arm is carried out in the transition zone by means of the mechanical switch, so that the arc discharge problem caused by abnormal turn-off after the electronic switch is short-circuited in the transition zone is avoided; meanwhile, due to the existence of the resistor, the forward conducting voltage of the electronic switch can be effectively provided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a control schematic diagram of the present invention.
FIG. 3 is a diagram of a commutation process according to the present invention.
FIG. 4 is a second diagram of the phase-changing process of the present invention.
FIG. 5 is a third diagram of the commutation process of the present invention.
FIG. 6 is a flow chart of a method of the present invention.
The reference numbers in the figures illustrate: 1. a train position identification unit; 2. a power switching unit.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1 to 5, the ground automatic neutral section passing device of this embodiment includes a train position identifying unit 1 and a power supply switching unit 2, where the power supply switching unit 2 includes a first electronic switch SCR _ V1 and a second electronic switch SCR _ V2, one end of the first electronic switch SCR _ V1 and one end of the second electronic switch SCR _ V2 are connected to a neutral contact network through an isolating switch QS2, and the other ends of the first electronic switch and the second electronic switch are respectively connected to a two-phase power supply arm; the first electronic switch is connected with a first switch loop in parallel, and the first switch loop comprises a first mechanical switch QF2 and a first resistor R1; the second electronic switch is connected in parallel with a second switch loop, and the second switch loop comprises a second mechanical switch QF4 and a second resistor R2. According to the ground automatic neutral-section passing device and the ground automatic neutral-section passing method, the mechanical switch and the resistor are connected in parallel on the electronic switch, when the train runs to the neutral area, the mechanical switch is firstly conducted to provide a power supply loop, and after the train runs to the neutral area, the corresponding electronic switch is conducted to supply power; because the hard connection between the neutral zone and the power supply arm is carried out in the transition zone by the mechanical switch, the arc discharge problem caused by abnormal turn-off after the electronic switch is short-circuited in the transition zone is avoided; meanwhile, due to the existence of the resistor, the forward conducting voltage of the electronic switch can be effectively provided.
In this embodiment, the first mechanical switch QF2 and the second mechanical switch QF4 are both circuit breakers; the first electronic switch SCR _ V1 and the second electronic switch SCR _ V2 are anti-parallel thyristors. In addition, the other end of the first electronic switch SCR _ V1 is connected with the phase A power supply arm through a circuit breaker QF1 and a disconnecting switch QS1 in sequence; the other end of the second electronic switch SCR _ V2 is connected with the B-phase power supply arm through a breaker QF3 and a disconnecting switch QS3 in sequence.
In this embodiment, the train-position identifying unit 1 includes a first position sensor CG1, a second position sensor CG2, a third position sensor CG3, and a fourth position sensor CG4 arranged in this order in the train traveling direction. The train position identification unit 1 mainly detects the train running position near the neutral zone, and provides a basis for the phase change switching of the power switching unit 2, which is equivalent to the 'eyes' of the power switching unit 2.
As shown in fig. 1 and fig. 2, the power supply switching unit 2 mainly realizes a switching function of the left and right two-phase power supply arms for supplying power to the neutral contact network. The train position identification unit 1 is used for detecting the position of a train, and when the train is about to enter a neutral area, a left power supply arm supplies power to the neutral area through QS1, QF2, R1 and the like according to the example of running of the train from left to right; when the train enters a neutral zone, the left power supply arm supplies power to the neutral zone through QS1, QF1, SCR _ V1 and the like; when the train is about to drive away from the neutral zone, the left power supply arm cuts off power supply to the neutral zone, meanwhile, the right power supply arm supplies power to the neutral zone through QS3, QF3, SCR _ V2 and the like, and when the train is completely driven away from the neutral zone, the right power supply arm cuts off power supply to the neutral zone.
As shown in fig. 6, the invention also correspondingly discloses a phase passing method based on the ground automatic phase passing device, which comprises the following steps:
s01, in an initial state, the first electronic switch, the second electronic switch, the first mechanical switch and the second mechanical switch are all in an off state; when the train position recognition unit 1 detects that the train runs to the front of the neutral zone, controlling a first mechanical switch to be closed; when the train runs to a neutral zone, a power supply of the power supply arm enters the neutral zone to supply power to the train after passing through the first mechanical switch and the first resistor;
s02, when the train position recognition unit 1 detects that the train runs to a preset position of a neutral zone, a first electronic switch is turned on, then a first mechanical switch is turned off, and at the moment, a power supply of a power supply arm enters the neutral zone through the first electronic switch to supply power to the train;
s03, when the train position recognition unit 1 detects that the train runs to a preset switching position of a neutral zone, switching a first electronic switch and a second electronic switch to achieve phase change;
and S04, when the train position identification unit 1 detects that the train leaves the neutral zone, disconnecting the second electronic switch to complete passing neutral section.
In the present embodiment, the train position identifying unit 1 determines the position of the train by a plurality of position sensors arranged in the train traveling direction.
The phase-split method of the present invention is further illustrated below with reference to an example:
as shown in fig. 3 to 5, when the train is running in the forward direction (from left to right), QS1, QS2 and QS3 are closed first, the ground is put into the system through automatic neutral section passing, QF1 and QF3 are closed under normal conditions, when the train runs to the CG1 position, the train position identification unit 1 outputs a signal, the logic control system controls QF2 to be closed, the neutral zone is powered by the left power supply arm at the moment, and when the train enters the neutral zone, electric energy supplies power to the train after passing through QS1, QF2 and R1 (as shown in fig. 3);
as shown in fig. 4, when the train completely passes through the transition zone and enters the neutral zone (for example, at the CG2 position), the first electronic switch SCR _ V1 is turned on, because of the existence of R1, a necessary condition can be provided for the conduction of the thyristor, the current is transferred from QF2 to the first electronic switch SCR _ V1, and then QF2 is turned off, because the current of QF2 is very small at this time, the electrical life of the circuit breaker can be greatly improved;
as shown in fig. 5, when the train runs to the CG3, the power supply between the two power supply arms is switched, the SCR _ V1 is turned off, and the SCR _ V2 is turned on, since the SCR _ V1 and the SCR _ V2 are both electronic switches, the switching speed is very fast (ms level), the train can be powered continuously almost until the train completely leaves the neutral zone (such as the CG 4), and then the SCR _ V2 is turned off, at this time, the whole passing phase process of the forward running is completed. Of course, when the train is traveling in reverse, i.e., from right to left, the corresponding commutation process is the same.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify equivalent embodiments using the teachings disclosed above, without departing from the scope of the solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (8)
1. The ground automatic passing neutral section device is characterized by comprising a train position identification unit (1) and a power supply switching unit (2), wherein the power supply switching unit (2) comprises a first electronic switch and a second electronic switch, one end of the first electronic switch is connected with one end of the second electronic switch and is connected with a neutral zone, and the other ends of the first electronic switch and the second electronic switch are respectively connected with a two-phase power supply arm; the first electronic switch is connected with a first switch loop in parallel, and the first switch loop comprises a first mechanical switch and a first resistor; the second electronic switch is connected with a second switch loop in parallel, and the second switch loop comprises a second mechanical switch and a second resistor.
2. The floor autopen-passing device of claim 1 wherein the first and second mechanical switches are circuit breakers.
3. The ground automatic passing neutral section device according to claim 1 or 2, wherein the train position recognition unit (1) comprises a first position sensor, a second position sensor, a third position sensor and a fourth position sensor arranged in sequence along the train traveling direction.
4. The ground automatic passing neutral section device of claim 1 or 2, wherein the first electronic switch and the second electronic switch are anti-parallel thyristors.
5. The ground automatic passing neutral section device as claimed in claim 1 or 2, wherein the other ends of the first electronic switch and the second electronic switch are connected with the power supply arm through a breaker and a disconnector in sequence.
6. The ground automatic passing neutral section device as claimed in claim 1 or 2, wherein one end of the first electronic switch and one end of the second electronic switch are connected to the neutral section via a circuit breaker.
7. An neutral section passing method based on the ground automatic neutral section passing device of any one of claims 1 to 6, which is characterized by comprising the following steps:
s01, in an initial state, the first electronic switch, the second electronic switch, the first mechanical switch and the second mechanical switch are all in an off state; when the train position identification unit (1) detects that the train runs to the front of the neutral zone, the first mechanical switch is controlled to be closed, and when the train runs to the neutral zone, a power supply of the power supply arm enters the neutral zone to supply power to the train after passing through the first mechanical switch and the first resistor;
s02, when the train position recognition unit (1) detects that the train runs to a preset position of a neutral zone, a first electronic switch is turned on, then a first mechanical switch is turned off, and at the moment, a power supply of a power supply arm enters the neutral zone through the first electronic switch to supply power to the train;
s03, when the train position recognition unit (1) detects that the train runs to a preset switching position in a neutral zone, switching a first electronic switch and a second electronic switch to realize phase change;
and S04, when the train position identification unit (1) detects that the train leaves the neutral zone, disconnecting the second electronic switch to complete passing neutral phase.
8. The passing phase separation method according to claim 7, wherein the train position recognition unit (1) judges the position of the train by a plurality of position sensors arranged in the train traveling direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810097173.8A CN110091759B (en) | 2018-01-31 | 2018-01-31 | Ground automatic neutral section passing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810097173.8A CN110091759B (en) | 2018-01-31 | 2018-01-31 | Ground automatic neutral section passing device and method |
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| CN110091759A CN110091759A (en) | 2019-08-06 |
| CN110091759B true CN110091759B (en) | 2022-11-08 |
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| CN113103929B (en) * | 2021-03-23 | 2023-05-30 | 北京交通大学 | Composite switch structure applied to railway ground automatic passing neutral section system |
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| CN102343835B (en) * | 2011-07-13 | 2013-03-20 | 北京兰德迅捷科技有限公司 | Method for realizing electric auto-passing neutral section of train by utilizing power electronic switching device |
| CN105835727A (en) * | 2015-01-15 | 2016-08-10 | 哈尔滨帕特尔科技股份有限公司 | Ground type non-contact automatic neutral-section passing device |
| CN105799553B (en) * | 2016-04-22 | 2018-03-16 | 中国船舶重工集团公司第七一二研究所 | A kind of electronic type ground automatic neutral-section passing device |
| CN205601650U (en) * | 2016-04-26 | 2016-09-28 | 西安铁路科学技术研究发展有限责任公司 | Ground control auto -passing phase separation system based on power electronic switch |
| CN106183897B (en) * | 2016-09-23 | 2018-08-10 | 西南交通大学 | A kind of electric railway subregion institute's automatic neutral-section passing system and its control method |
| CN106394318B (en) * | 2016-11-02 | 2020-01-10 | 株洲变流技术国家工程研究中心有限公司 | Ground automatic neutral section passing device and control method thereof |
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