CN201659895U - Switchless automatic neutral section passing device for electrified railways - Google Patents
Switchless automatic neutral section passing device for electrified railways Download PDFInfo
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- CN201659895U CN201659895U CN2010201294866U CN201020129486U CN201659895U CN 201659895 U CN201659895 U CN 201659895U CN 2010201294866 U CN2010201294866 U CN 2010201294866U CN 201020129486 U CN201020129486 U CN 201020129486U CN 201659895 U CN201659895 U CN 201659895U
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Abstract
The utility model relates to a switchless automatic neutral section passing device for electrified railways. The system is characterized in that: a high-voltage high-resistance resistor R is connected in series between a feeding section U or D of any of output phases Alpha and Beta of three-phase/two-phase transformers T of traction substations and a neutral section M1 of a catenary; and a high-voltage high-resistance resistor R is connected in series between the tail end of any of the feeding sections U and D of each traction substation and a neutral section M2 of the catenary between two traction substations as well. High-voltage switches or breakers do not need to be arranged in the automatic neutral section passing device, consequently, the phenomenon of transient overvoltage caused by frequent switching is avoided, and an electric locomotive can safely, reliably and automatically pass neutral sections; and the operation cost and the maintenance cost are reduced.
Description
Technical field
The utility model relates to a kind of electrified railway does not have the automatic phase splitting device of crossing of switch switching.
Background technology
That monophase system had was simple in structure, construction cost is low, utilization and advantage such as easy to maintenance, and having determined the railway system generally to adopt the single phase industrial frequence alternating current in electrified railway is the railway locomotive power supply.Wish then that as the electric system of power supply department the railway system takes electric current relatively symmetrically from electrical network three, thereby avoid in electrical network, causing too much negative-sequence current.For satisfying this requirement, electric railway adopts the scheme that phase sequence is rotated, the segmentation phase-splitting is powered, and every along the railway 20-25km is as a power supply section, and each section is successively respectively by the not cophase supply in the electrical network.The mode of this sectional power supply, commutation has in turn formed a unique texture-electric phase-splitting of electric railway traction power supply system.Owing to take the sectional power supply mode, every section phase place is also different, need insulate between section and the section by suitable mode, this section and section between insulation system promptly be called electric phase-splitting.Train carries out the transition to the process of another section for power supply from a section for power supply in operational process, be called train and cross phase-splitting.Because phase-splitting is frequent, the train operator must finish the phase-splitting step at the utmost point in the short time, and driver's labour intensity is very big, particularly in high speed railway, crosses phase-splitting and almost can't manually be finished by the driver, must adopt the automatic phase-splitting technology of crossing.For making the smooth phase-splitting excessively of motor train unit or electric locomotive, the multiple phase-splitting solution of crossing is suggested, and mainly contains vehicle-mounted automatic phase-splitting, the automatic phase-splitting scheme etc. of crossing in ground crossed.
Vehicle-mounted automatically too by the cooperating of train and ground signal, cross phase-splitting by train control system simulation driver is manual ON TRAINS, promptly disconnected automatically auxiliary circuit, the line circuit breaker that breaks, close line circuit breaker, close sequence of operations process such as auxiliary circuit.These maximum characteristics of crossing the phase-splitting mode are the undue phase times of train, need outage, and train passes through neutral section by inertia, both influenced the running velocity of train, again because line circuit breaker frequently opens and closes, be greatly affected the service life of line circuit breaker, increased investment and over-the-road expense simultaneously; The over voltage that change action frequently causes also can influence the electrical equipment of locomotive; In handoff procedure, also the ferromagnetic resonance phenomenon may occur, influence the automatic reliability of crossing phase-splitting.
The automatic phase-splitting excessively in ground then is to cooperate with the train position signal by the ground switchgear, disconnects a last feeding section earlier, and then connect with next feeding section, promptly switch on the neutral section by the get along feeding section voltage at two ends of switch branch, train is during by neutral section, and it also needs the short time outage.
Automatically the shortcoming of crossing phase-splitting is: switch need carry out change action continually, the over voltage that produces in handoff procedure has influenced the influence of switch life, has both influenced the automatic reliability of crossing phase-splitting, simultaneously need often to change switch the expense that has increased operation and safeguarded again.
The utility model content
The purpose of this utility model just provides a kind of electrified railway does not have the automatic phase splitting device of crossing of switch switching, this is crossed does not need to be provided with high-voltage switch gear or circuit breaker in the phase splitting device, the transient overvoltage phenomenon of avoiding frequent switching to cause realizes the automatic safely and reliably phase-splitting excessively of electric locomotive; Save operating cost and maintenance cost.
The utility model solves its technical matters, and the technical scheme that is adopted is: a kind of electrified railway does not have switch and switches the automatic phase splitting device of crossing, and its constructional feature is:
All be in series with the big resistance resistance of high pressure between the neutral section of the feeding section of arbitrary output phase of the three-phase of traction substation-two phase transformer and the contact system in traction substation exit; The big resistance resistance of high pressure of also all connecting between the neutral section of contact system between the end of arbitrary feeding section of traction substation and two traction substations.
Principle of work of the present utility model is: traction substation is by utility grid, and each connects for an electric arm mutually in two outputs of traction substation, constitutes the current supply circuit of electric locomotive respectively.The resistance of the big resistance of high pressure of between the feeding section of arbitrary phase of traction substation and the neutral section of non-conductive, all connecting, because resistance is big, though this two resistance is connected left and right sides current supply circuit, but the electric current of ganging up between two loops is very little, it is little to influence each other, and has reduced the transient process of the undue phase time of locomotive.Equally, two substation's feeding sections do not hold with neutral section between the resistance that is connected in series, also make the electric current of ganging up between two substations very little, it is little to influence each other, and satisfies the insulating requirements of phase-splitting.
When locomotive moved in current supply circuit, feeding section was a locomotive power supply; Locomotive moves to the neutral section or neutral section process between two traction substations in traction substation exit, owing to be serially connected in the shock damping action of the big resistance resistance of high pressure on the feeding section, the transient overvoltage phenomenon of having avoided switch to switch from feeding section; When locomotive moves in neutral section,,, switch to next current supply circuit power supply by the shock damping action of resistance because neutral section two ends are serially connected with big resistance with making locomotive non-transient over voltage.Thereby make locomotive realize that no switch switches, also superpotential automatically, the safety of non-transient phase-splitting.
Compared with prior art, the beneficial effects of the utility model are:
One, the utility model had both solved the Insulation Problems between two section for power supplys of out of phase by the big resistance of serial connection, and train can be crossed phase-splitting smoothly; Utilize the shock damping action of resistance simultaneously, the transient overvoltage phenomenon of having avoided frequent switching to cause has improved the reliability and the safety of crossing phase-splitting.
Two, do not need high-voltage switch gear or circuit breaker are set, reduced investment cost, need not frequently to change switch simultaneously, reduced operation and maintenance cost yet.
Two, owing to weakened the caused over voltage of transient process of crossing the phase-splitting generation, reduced adverse effect, improved power supply reliability and safety the tractive power supply system electrical equipment.
The big resistance resistance of above-mentioned high pressure withstand voltage greater than 27.5kV, resistance is 150-1500 Ω.
Such resistance had both guaranteed that energy consumption was less, and simultaneously at the undue phase time of locomotive, current changing rate is also less, plays shock damping action preferably, effectively avoids the generation of transient overvoltage.
The utility model will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment
Fig. 1 illustrates, a kind of specific embodiment of the present utility model is: a kind of electrified railway does not have switch and switches automatic the mistake in the phase splitting device, three-phase input end A, B, the C of the three-phase of traction substation-two phase transformer T link to each other with the three-phase of utility network respectively, its arbitrary output phase α all is in series with the big resistance resistance R of high pressure between the neutral section of feeding section U, the D of β and the contact system in the traction substation exit M1; The big resistance resistance R of high pressure of also all connecting between the neutral section of contact system between the end of arbitrary feeding section U, the D of traction substation and two traction substations M2.
The big resistance resistance R of this routine mesohigh withstand voltage greater than 27.5kV, resistance is 150-1500 Ω.
Fig. 1 also shows the process of locomotive by the neutral section between two traction substations.When locomotive L moved in current supply circuit, up feeding section U or descending feeding section D were locomotive L power supply; Locomotive L moves to the neutral section M1 in traction substation exit from up feeding section U, or two in the process of neutral section M2 between the traction substation, owing to be serially connected in the shock damping action of the big resistance noninductive resistance of the high pressure R on the feeding section U, locomotive L electric current reduces gradually, but not transient change has been avoided the transient overvoltage phenomenon; As locomotive L during in neutral section M2 operation, because neutral section M2 two ends are serially connected with big resistance R, locomotive L obtains little electric current by neutral section M2, goes up the shock damping action of the resistance R of serial connection subsequently again by descending feeding section D, switches to next current supply circuit power supply with making locomotive L non-transient over voltage.
Claims (2)
1. an electrified railway does not have the automatic phase splitting device of crossing of switch switching, it is characterized in that: (α all is in series with the big resistance resistance of high pressure (R) between the neutral section of the contact system in feeding section β) (U, D) and traction substation exit (M1) to arbitrary output phase of the three-phase of traction substation-two phase transformer (T); The big resistance resistance of high pressure (R) of also all connecting between the neutral section of contact system between the end of arbitrary feeding section of traction substation (U, D) and two traction substations (M2).
2. a kind of electrified railway according to claim 1 does not have switch and switches the automatic phase splitting device of crossing, and it is characterized in that: the big resistance resistance of described high pressure (R) withstand voltage greater than 27.5kV, resistance is 150-1500 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201294866U CN201659895U (en) | 2010-03-12 | 2010-03-12 | Switchless automatic neutral section passing device for electrified railways |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201294866U CN201659895U (en) | 2010-03-12 | 2010-03-12 | Switchless automatic neutral section passing device for electrified railways |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201659895U true CN201659895U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201294866U Expired - Lifetime CN201659895U (en) | 2010-03-12 | 2010-03-12 | Switchless automatic neutral section passing device for electrified railways |
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| Country | Link |
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| CN (1) | CN201659895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767540A (en) * | 2010-03-12 | 2010-07-07 | 李子晗 | Switch-free switching auto-passing neutral section device for the electric railway |
-
2010
- 2010-03-12 CN CN2010201294866U patent/CN201659895U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767540A (en) * | 2010-03-12 | 2010-07-07 | 李子晗 | Switch-free switching auto-passing neutral section device for the electric railway |
| CN101767540B (en) * | 2010-03-12 | 2012-05-30 | 李子晗 | Switch-free switching auto-passing neutral section device for the electric railway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101201 Effective date of abandoning: 20120530 |