CN110091757B - Ground automatic neutral section passing device with redundancy function and control method - Google Patents
Ground automatic neutral section passing device with redundancy function and control method Download PDFInfo
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- CN110091757B CN110091757B CN201810096242.3A CN201810096242A CN110091757B CN 110091757 B CN110091757 B CN 110091757B CN 201810096242 A CN201810096242 A CN 201810096242A CN 110091757 B CN110091757 B CN 110091757B
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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
Abstract
The invention discloses a ground automatic neutral section passing device with a redundancy function and a control method thereof, wherein the device comprises two main switch units respectively connected between power supply arms at two sides and a neutral section, and a standby switch unit and a redundancy switching control unit which are connected with each other, wherein the on-off of the two main switch units is sequentially controlled when a train passes through a neutral section so as to control the phase change. The invention can realize the redundancy function of ground automatic passing neutral section, and has the advantages of simple structure, low cost, no influence on the operation of the original device, flexible use and the like.
Description
Technical Field
The invention relates to the technical field of traction power supply of electrified railways, in particular to a ground automatic neutral section passing device with a redundancy function and a control method.
Background
The electrified railway contact network adopts a single-phase power frequency alternating current power supply mode, in order to reduce the voltage unbalance degree of a three-phase power supply network of a power system and improve the utilization rate of the power network, the electrified railway adopts sectional split-phase power supply, namely a section of neutral area without electricity is embedded between two power supply arms with different voltage phases, and each power supply arm and the neutral area are in smooth transition through an anchor section joint.
In order to reduce the adverse effect of the electric phase separation area of the contact network, at present, two modes of vehicle-mounted automatic passing phase separation or ground automatic passing phase separation are mainly adopted, wherein the vehicle-mounted automatic passing phase separation mode is shown in figure 1, after a train obtains a passing phase separation forecast signal transmitted from the ground, firstly confirmation is carried out, then a trigger pulse of a traction converter is blocked (which is equal to that a driver returns a traction handle to zero when the train is subjected to manual passing phase separation), and a main breaker is disconnected in a delayed mode, so that the train is lazed to pass through a non-electric area; after passing through the dead zone, the train is restarted in the reverse order. The vehicle-mounted automatic passing neutral section mode is essentially a power-off passing neutral section mode, the power-off region is long, the speed loss is large, the traction loss is serious, the overvoltage phenomenon is serious, and the safe operation of electrical equipment can be influenced.
The ground automatic neutral section passing mode can be divided into mechanical switch ground automatic neutral section passing and electronic switch ground automatic neutral section passing according to the switch type, when the train passes through the neutral section, the purpose of supplying power to the neutral section is achieved through switching two sets of switches in sequence, the time of no electricity of the train can be greatly reduced, and meanwhile, the speed and the traction loss are reduced. However, the ground automatic passing neutral section mode must rely on the normal work of two sets of switches, the two sets of switches may have faults such as damage in the long-term use process, and when any one set of switch has a fault, the whole passing neutral section process cannot be completed, so that the redundancy reliability of the whole device is low, and the stable and reliable running of the train when passing neutral section cannot be ensured. A typical ground automatic neutral section passing device is shown in fig. 2, and automatic neutral section passing is realized by switching two groups of thyristor valve banks, but as described above, when any one group of thyristor valve banks fails, the whole device cannot work normally, and the reliability of equipment is poor.
In order to improve the redundancy reliability of the phase-splitting passing device, practitioners propose to set independent backup switches for two sets of switches, but generally, a set of backup switches is set for each set of switches, and when one set of switches fails, the corresponding set of backup switches is switched to use. However, the above-mentioned mode of setting up the stand-by switch for two sets of switches respectively, because need set up two sets of stand-by switches simultaneously, increased equipment cost, especially when using electronic switch as stand-by, can promote equipment cost greatly, and the probability that two sets of switches broke down simultaneously is less, all is single point trouble usually, only one of them switch had the trouble promptly, sets up two sets of independent stand-by switches and can make equipment utilization low.
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 the ground automatic neutral section passing device and the control method, which can realize the redundancy function of ground automatic neutral section passing, have simple structure and low cost, do not influence the operation of the original device and are flexible to use.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a ground automatic passing neutral section device that possesses redundant function, is including connecting two main switch units between both sides power supply arm and neutral section respectively, through control two in proper order when the train passes through the phase separation zone the break-make of main switch unit to the control carries out commutation, its characterized in that: still include interconnect's standby switch unit and redundant switching control unit, the both ends of standby switch unit are equallyd divide respectively with two the both ends of main switch unit are connected, redundant switching control unit control is as one when main switch unit trouble, switching access the standby switch unit replaces the trouble main switch unit.
As a further improvement of the device of the invention: and the redundancy switching control unit controls switching access of the standby switch unit to replace the failed main switch unit by switching on a connecting loop between the standby switch unit and the failed main switch unit.
As a further improvement of the device of the invention: the standby switch units are respectively connected with the two main switch units through a high-voltage switch, each high-voltage switch is connected with the redundancy switching control unit, and switching access to the standby switch units to replace the main switch units on the corresponding sides is controlled by controlling on-off of each high-voltage switch.
As a further improvement of the device of the invention: the high-voltage switch is specifically an isolating switch, a circuit breaker or a load switch and the like.
As a further improvement of the device of the invention: the standby switch unit and the main switch unit are mechanical switch units or electronic switch units.
As a further improvement of the device of the invention: the mechanical switch unit is a circuit breaker or a load switch; the electronic switch unit comprises more than one thyristor valve group, and the thyristor valve group comprises more than two thyristors which are connected in anti-parallel.
As a further improvement of the device of the invention: the system also comprises a fault detection unit connected with the redundancy switching control unit and used for detecting the fault states of the two main switch units in real time, and when one of the main switch units is detected to be in fault, a corresponding control instruction is sent to the redundancy switching control unit.
As a further improvement of the device of the invention: the train phase-change control device is characterized by further comprising a logic control unit and a position detection unit used for detecting train position signals, wherein the logic control unit is respectively connected with the position detection unit and the two main switch units, and when a train passes through a phase-change area, the logic control unit respectively controls the two main switch units to be switched on and off to change phases according to the train position signals detected by the position detection unit.
The invention further provides a control method utilizing the ground automatic neutral section passing device, which comprises the following steps:
s1, detecting the fault states of two main switch units in real time;
s2, when the main switch unit is detected to have a fault, controlling switching to be connected to the standby switch unit to replace the failed main switch unit;
and S3, when the train passes through the phase separation area, controlling the standby switch unit and the other main switch unit to be switched on and off to execute phase change.
As a further improvement of the control method of the invention: in step S2, the backup switch unit is switched to replace the failed main switch unit by turning on the connection loop between the backup switch unit and the failed main switch unit.
As a further improvement of the control method of the invention: in step S2, the standby switch unit is switched to replace the failed main switch unit by closing a high-voltage switch connected between the standby switch unit and the failed main switch unit.
As a further improvement of the control method of the invention: step S3 is followed by controlling to turn off the standby switch unit to restore access to the corresponding main switch unit when the failed main switch unit is restored to a normal state.
Compared with the prior art, the invention has the advantages that:
1) the invention sets a spare switch unit and a redundancy switching control unit on the basis of setting two main switch units to realize automatic passing phase separation, the spare switch unit is respectively connected with the two main switch units, when any one main switch unit fails, the spare switch unit is switched in to replace the failed main switch unit, and the backup of two sets of main switch units can be realized by one set of spare switch unit, thereby when any one set of main switch unit fails, the normal operation of the device can be still maintained without influencing the performance of the device, the redundancy reliability of the device is effectively improved, and simultaneously, the cost required by the device can be greatly reduced and the utilization rate of the device is improved by multiplexing one set of spare switch unit.
2) The backup switch unit is further connected with the two main switch units through one high-voltage switch respectively, the switching access backup switch unit is controlled to replace the main switch unit on the corresponding side by controlling the on-off of each high-voltage switch, and on the basis of the in-situ automatic passing phase splitting device, the two main switches can be reserved only by additionally arranging one set of backup switch and two auxiliary high-voltage switches without arranging other hardware structures, so that the whole device is simple in structure and low in implementation cost.
Drawings
FIG. 1 is a schematic diagram of the implementation principle of the vehicle-mounted automatic neutral-section passing mode.
FIG. 2 is a schematic diagram of the structure principle of a typical ground automatic passing neutral section.
Fig. 3 is a schematic structural diagram of a ground automatic neutral-section passing device with a redundancy function in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of the principle of implementing redundant ground automatic passing phase separation in embodiment 1 of the present invention.
Fig. 5 is a schematic structural diagram of a ground automatic neutral-section passing device with a redundancy function in embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of a ground automatic neutral section passing apparatus with a redundant function in embodiment 3 of the present invention.
Fig. 7 is a schematic structural diagram of a ground automatic neutral-section passing device with a redundancy function in embodiment 4 of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
Example 1:
as shown in fig. 3, the ground automatic neutral-section passing device with the redundancy function of the embodiment includes two main switch units V1, V2 respectively connected between the power supply arms on both sides and the neutral section, and respectively bridged at both ends of two neutral-section insulators JY1, JY2, wherein one main switch unit is connected between the power supply arm on one side and the neutral section, and the other main switch unit is connected between the power supply arm on the other side and the neutral section, and when a train passes through the neutral section, the on-off of the two main switch units V1, V2 is sequentially controlled, so as to control the power supply arm a and the power supply arm b to be sequentially switched to supply power to the neutral section, and the automatic neutral-section passing is realized; the intelligent switching system further comprises a standby switch unit V3 and a redundancy switching control unit, wherein the standby switch unit V3 is connected with two ends of the two main switch units V1 and V2 respectively, and the redundancy switching control unit controls switching-in of the standby switch unit V3 to replace the failed main switch unit V1/V2 when one main switch unit V1/V2 fails.
According to the embodiment, the two main switch units (V1 and V2) are arranged, so that the on-off of the two main switch units V1 and V2 are sequentially controlled when a train passes through the neutral section, the ground automatic neutral section passing is realized, the train operation time can be shortened based on the ground automatic neutral section passing mode, the line transport capacity and the service life of high-voltage electrical equipment on the train are improved, and the operation and maintenance cost can be reduced.
In the embodiment, on the basis of arranging two main switch units (V1, V2) to realize ground automatic neutral section, a standby switch unit V3 and a redundant switching control unit are arranged, the standby switch unit V3 is respectively connected with the two main switch units (V1, V2), when any one main switch unit V1/V2 fails, the standby switch single V3 unit is switched in to replace the failed main switch unit V1/V2, the backup of two sets of main switch units (V1, V2) can be realized by one set of standby switch unit V3, therefore, when any set of main switch unit V1/V2 has a fault, the normal operation of the device can be still maintained without influencing the performance of the device, the redundancy reliability of the device is effectively improved, meanwhile, by multiplexing a set of standby switch units V3, the cost required by the device can be greatly reduced, and the utilization rate of the equipment can be improved.
In the embodiment, the redundancy switching control unit controls the switching-in standby switch unit V3 to replace the failed main switch unit V1/V2 by switching on the connection loop between the standby switch unit V3 and the failed main switch unit V1/V2. When the main switch unit V1 is detected to be failed, the redundancy switching control unit controls to switch on the connection loop of the standby switch unit V3 and the two ends of the main switch unit V1, namely, the standby switch unit V3 is connected with the main switch unit V1 in parallel so as to switch the main switch unit V1 replaced by the standby switch unit V3; when it is detected that the main switching unit V2 the redundant switching control unit controls to turn on the connection circuit between the backup switching unit V3 and the main switching unit V2, that is, to connect the backup switching unit V3 in parallel with the main switching unit V2 to switch the replacement of the main switching unit V2 by the backup switching unit V3.
In this embodiment, the standby switch unit V3 is connected to the two main switch units V1 and V2 through one high-voltage switch, each high-voltage switch is connected to the redundant switching control unit, and the switching access standby switch unit is controlled to replace the main switch unit on the corresponding side by controlling the on/off of each high-voltage switch. As shown in fig. 3, the high voltage switch of this embodiment specifically includes high voltage switches QS1 and QS2, the standby switch unit V3 is connected to both ends of the main switch unit V1 through the high voltage switch QS1, the standby switch unit V3 is connected to both ends of the main switch unit V2 through the high voltage switch QS2, and the access to the standby switch unit V3 is controlled by closing the high voltage switches QS1/QS2 to replace the main switch unit V1/V2.
The high-voltage switch can adopt a disconnecting switch, and can also adopt a breaker, a load switch and the like.
The ground automatic neutral section realizing the redundancy function of the embodiment is shown in fig. 4, wherein (a) corresponds to the failure of the main switch unit V1, when the main switch unit V1 fails, the high voltage switch QS1 is closed, and the standby switch unit V3 can work in place of the failed main switch unit V1; in the case of the failure of the main switch unit V2, the standby switch unit V3 can be used to replace the failed main switch unit V2 by closing the high voltage switch QS2 when the main switch unit V2 fails.
Through adopting above-mentioned structure, only need increase and set up one set of standby switch and two auxiliary high voltage switch (QS1, QS2), can realize the reserve of main switch unit V1, V2, need not to set up other hardware structure, the simple structure of whole device and realize with low costs.
In this embodiment, the system further comprises a fault detection unit connected to the redundant switching control unit, and configured to detect fault states of the two main switch units V1 and V2 in real time, and when it is detected that one of the main switch units V1/V2 has a fault, send a corresponding control command to the redundant switching control unit.
The ground automatic passing neutral section device with the redundancy function further comprises a logic control unit and a position detection unit for detecting train position signals, wherein the logic control unit is respectively connected with the position detection unit and the two main switch units (V1 and V2), and when a train passes through a neutral section area, the logic control unit respectively controls the two main switch units to be switched on and off to change the phase according to the train position signals detected by the position detection unit. The position detection unit specifically comprises sensors CG1, CG2 and CG3 respectively arranged at the front end of the neutral section side, the position of the neutral section middle needing phase change and the rear end of the neutral section to respectively detect whether the train is about to enter the neutral section, reach the phase change position and leave the neutral section.
As shown in fig. 3, in the automatic ground passing apparatus of this embodiment, the two main switch units are specifically connected to the two power supply arms and the neutral section through the breakers QF1 to QF3, respectively, and the breakers QF1 to QF3 can control the connection and disconnection of the two main switch units.
In this embodiment, the control method using the above ground automatic neutral section passing apparatus includes the steps of:
s1, detecting the fault states of two main switch units in real time;
s2, when detecting that the main switch unit has a fault, controlling switching to access the standby switch unit to replace the faulty main switch unit;
and S3, when the train passes through the phase separation area, controlling the standby switch unit and the other main switch unit to be switched on and off to execute phase change.
In the above step S2 of the present embodiment, specifically, by turning on the connection loop between the backup switch unit V3 and the failed main switch unit V1, V2, the backup switch unit is controlled to be switched on to replace the failed main switch unit, that is, when the failure of the main switch unit V1 is detected, the connection loop between the backup switch unit V3 and the main switch unit V1 is controlled to be turned on, that is, the backup switch unit V3 is connected in parallel with the main switch unit V1, so as to switch the replacement of the main switch unit V1 by the backup switch unit V3; when it is detected that the main switching unit V2 the redundant switching control unit controls to turn on the connection circuit between the backup switching unit V3 and the main switching unit V2, that is, to connect the backup switching unit V3 in parallel with the main switching unit V2 to switch the replacement of the main switching unit V2 by the backup switching unit V3.
In this embodiment, in step S2, the access backup switch unit is switched to replace the failed main switch unit by closing the high voltage switch connected between the backup switch unit and the failed main switch unit, that is, the access backup switch unit V3 is controlled to replace the main switch unit V1/V2 by closing the high voltage switch QS1/QS 2.
In this embodiment, whether the main switch units V1 and V2 have faults is determined according to the fault state information of the main switch units V1 and V2, when the main switch unit V1/V2 which is originally put into operation has faults, the corresponding high-voltage switch QS1/QS2 is closed, and then the standby switch unit V3 replaces the faulty main switch unit V1/V2 to operate.
In this embodiment, after step S3, when the failed main switch unit returns to the normal state, the method further includes controlling to turn off the standby switch unit to resume accessing the corresponding main switch unit.
Example 2:
as shown in fig. 5, this embodiment is substantially the same as embodiment 1, except that the main switch unit V1, the main switch unit V2, and the standby switch unit V3 are all mechanical switches, specifically, a circuit breaker, a load switch, etc. can be used, the mechanical switches have low cost and strong arc extinguishing capability, and the cost required by the device can be further reduced based on the fully mechanical switch structure.
Example 3:
as shown in fig. 6, the present embodiment is substantially the same as embodiment 1, except that the main switch unit V1, the main switch unit V2, and the standby switch unit V3 are all electronic switches, and the electronic switches specifically adopt thyristor valve groups, and each thyristor valve group includes more than two thyristors connected in anti-parallel.
The mechanical switch has the advantages that the response speed is low, the problems of inrush current, overvoltage and the like can exist, and adverse effects can be brought to system performance after the fault exits from operation.
Example 4:
as shown in fig. 7, the present embodiment is substantially the same as embodiment 1, except that the main switch unit V1, the main switch unit V2, and the backup switch unit V3 adopt a hybrid switch structure of a combination of mechanical switches and electronic switches, where (a) corresponds to the backup switch unit V3 using a mechanical switch and the main switch unit using an electronic switch of a thyristor valve set, and (b) corresponds to the backup switch unit V3 using an electronic switch of a thyristor valve set and the main switch unit using a mechanical switch.
In the embodiment, a hybrid switch structure in which a mechanical switch and an electronic switch are mixed is adopted, and the advantages of the mechanical switch and the electronic switch can be combined to realize the connection and disconnection of the circuit.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. 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 (12)
1. The utility model provides a ground automatic passing neutral section device that possesses redundant function, is including connecting two main switch units between both sides power supply arm and neutral section respectively, through control two in proper order when the train passes through the phase separation zone the break-make of main switch unit to the control carries out commutation, its characterized in that: the ground automatic neutral-section passing device is only provided with one standby switch unit, and the standby switch unit simultaneously realizes the backup of the two main switch units, two ends of the standby switch unit are respectively connected with two ends of the two main switch units through a high-voltage switch, namely, two ends of the standby switch unit are respectively connected with one main switch unit through a high-voltage switch, the two ends of the standby switch unit are also respectively connected with the other main switch unit through the other high-voltage switch, the ground automatic neutral-section passing device also comprises a redundant switching control unit connected with the standby switch unit, the redundant switching control unit controls when one main switch unit fails, and the on-off of each high-voltage switch is controlled, so that the standby switch unit is switched to replace the failed main switch unit.
2. The ground automatic neutral passing device with the redundancy function according to claim 1, wherein: and the redundancy switching control unit controls switching access of the standby switch unit to replace the failed main switch unit by switching on a connecting loop between the standby switch unit and the failed main switch unit.
3. The ground automatic neutral passing device with the redundancy function according to claim 2, wherein: the standby switch units are respectively connected with the two main switch units through a high-voltage switch, each high-voltage switch is connected with the redundancy switching control unit, and switching access to the standby switch units to replace the main switch units on the corresponding sides is controlled by controlling on-off of each high-voltage switch.
4. The ground automatic neutral passing device with the redundancy function according to claim 3, wherein: the high-voltage switch is specifically one of a disconnecting switch, a circuit breaker and a load switch.
5. The ground automatic passing neutral section device with the redundancy function according to any one of claims 1 to 4, wherein: the standby switch unit and the main switch unit are mechanical switch units or electronic switch units.
6. The ground automatic neutral-passing device with the redundancy function of claim 5, wherein: the mechanical switch unit is a load switch or a high-voltage switch; the electronic switch unit comprises more than one thyristor valve group, and the thyristor valve group comprises more than two thyristors which are connected in anti-parallel.
7. The ground automatic passing neutral section device with the redundancy function according to any one of claims 1 to 4, wherein: the system also comprises a fault detection unit connected with the redundancy switching control unit and used for detecting the fault states of the two main switch units in real time, and when one of the main switch units is detected to be in fault, a corresponding control instruction is sent to the redundancy switching control unit.
8. The ground automatic passing neutral section device with the redundancy function according to any one of claims 1 to 4, wherein: the train phase-change control device is characterized by further comprising a logic control unit and a position detection unit used for detecting train position signals, wherein the logic control unit is respectively connected with the position detection unit and the two main switch units, and when a train passes through a phase-change area, the logic control unit respectively controls the two main switch units to be switched on and off to change phases according to the train position signals detected by the position detection unit.
9. The control method of the ground automatic neutral-section passing device according to any one of claims 1 to 8, characterized by comprising the following steps:
s1, detecting the fault states of two main switch units in real time;
s2, when the main switch unit is detected to have a fault, controlling switching to be connected to the standby switch unit to replace the failed main switch unit;
and S3, when the train passes through the phase separation area, controlling the standby switch unit and the other main switch unit to be switched on and off to execute phase change.
10. The control method according to claim 9, wherein in step S2, switching into the backup switch unit to replace the failed main switch unit is controlled by closing a connection loop between the backup switch unit and the failed main switch unit.
11. Control method according to claim 10, characterized in that in step S2, the backup switching unit is switched in place of the failed main switching unit, in particular by closing a high voltage switch connected between the backup switching unit and the failed main switching unit.
12. The control method according to claim 9, 10 or 11, wherein the step S3 is followed by further comprising controlling to open the backup switch unit to restore access to the corresponding main switch unit when the failed main switch unit is restored to a normal state.
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| CN114103737A (en) * | 2020-09-01 | 2022-03-01 | 株洲中车时代电气股份有限公司 | Train power supply system and control equipment for automatic passing through neutral section of train |
| 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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| CN201559547U (en) * | 2009-12-17 | 2010-08-25 | 中铁电气化局集团有限公司 | Non-breaking automatic split phase passing device for high speed motor train unit |
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| CN1665174A (en) * | 2004-03-03 | 2005-09-07 | 华为技术有限公司 | Apparatus for providing node protection in optical network and implementing method thereof |
| JP5211853B2 (en) * | 2007-10-30 | 2013-06-12 | 株式会社明電舎 | Middle section power switching system for AC electric railway |
| DE102010002694A1 (en) * | 2010-03-09 | 2011-09-15 | Siemens Aktiengesellschaft | System for controlling power source interface of rail vehicle between power supply line sections of electrical traction current system, in electrical railway network, has arc detection module for detecting arcs among contact wires |
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