CN211641916U - Traction power supply system structure applying single-phase traction transformer - Google Patents
Traction power supply system structure applying single-phase traction transformer Download PDFInfo
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- CN211641916U CN211641916U CN201922006135.XU CN201922006135U CN211641916U CN 211641916 U CN211641916 U CN 211641916U CN 201922006135 U CN201922006135 U CN 201922006135U CN 211641916 U CN211641916 U CN 211641916U
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Abstract
The utility model provides an use single-phase traction transformer's traction power supply system structure, can realize that traction substation end electricity phase-splitting moves according to the electricity segmentation mode when normal power supply, and the process of switching over is comparatively simple and convenient under the fault condition, prevents the maloperation, guarantees the safe and reliable operation of system, effectively solves big ramp electricity phase-splitting technical problem. The system comprises a traction substation and four feedback lines for a left side power supply arm and a right side power supply arm, wherein the traction substation adopts a single-phase traction transformer, a feedback line is newly added on the 27.5kV side of the traction substation, the newly added feedback line is an in-phase power supply with the feedback lines of the left side power supply arm and the right side power supply arm, an anchor section joint type neutral section at the end of the traction substation is supplied with power through the newly added feedback line, and the anchor section joint type neutral section is connected with the four feedback lines of the left side power supply arm and the right side power supply arm through auxiliary buses and serves as a standby feedback line of the four feedback lines.
Description
Technical Field
The utility model relates to an electric railway pulls power supply system, in particular to use single-phase traction transformer's traction power supply system structure.
Background
Compared with other connection type traction transformers, theoretically, when in normal operation, the electric phase splitting of the end section of a traction substation can operate according to an electric segmentation mode, the speed and power loss generated by short-time power loss of a locomotive through an electric phase splitting neutral section can be effectively reduced, the riding comfort of passengers is improved, and the like.
The electrified split phase of the contact network is used as the electrical insulation of the power supply division of different phases, an anchor section joint mode is adopted in a high-speed railway and even most common-speed electrified railways, the anchor section joint type electric split phase is composed of adjacent insulated anchor section joints and an uncharged overhead contact network section in the middle, the uncharged overhead contact network section is called as a neutral section, when a train pantograph enters the uncharged neutral section, the power loss and the speed loss are caused in a short time, if the electric split phase is arranged in a long ramp section, the power loss and the speed loss are more serious, and accidents such as slope stop, slope slow and the like can be caused, so that the arrangement of the electric split phase in the long ramp electrified railway is often an important technical problem.
Theoretically, a single-phase traction transformer is adopted, two sides of a power supply arm are provided with same-phase power supplies, under the normal condition, the end electric phase separation of a traction substation can operate according to the electric phase separation mode, the problem of setting the long and large ramp electric phase separation can be overcome and solved, however, when the traction substation breaks down and quits operation, and power is supplied from an adjacent traction substation, the power supplies of the power supply arms on two sides of the traction substation quit to operate to adjacent different traction substations, the electric phase separation mode needs to be recovered to operate, the reversing process is complicated, and generally, the operation and the reliability of the operation are considered to be poor by adopting a switch on a contact network, so that the safe and reliable operation of a system is ensured. Therefore, in actual operation, the problem of large-ramp electric phase splitting is not effectively solved by adopting the single-phase traction transformer.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a traction power supply system structure of using single-phase traction transformer is proposed, draw substation's end electric phase splitting to move according to the electricity segmentation mode when can realizing normal power supply, the process of switching back over is comparatively simple and convenient, prevent the maloperation under the fault circumstance, and the operation of assurance system safe and reliable effectively solves big ramp electricity phase splitting technological problem.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses an use single-phase traction transformer's traction power supply system structure, including four back feeders that pull the electric substation and supply left side power supply arm, right side power supply arm, characterized by: the traction substation adopts a single-phase traction transformer, a newly-added feedback line is arranged on the 27.5kV side of the traction substation, the newly-added feedback line, the feeders of the left power supply arm and the right power supply arm are in-phase power supplies, the articulated electric phase splitting neutral section of the anchor section at the end of the traction substation is supplied with power through the newly-added feedback line, and the articulated electric phase splitting neutral section is connected with four feedback lines of the left power supply arm and the right power supply arm through auxiliary buses and serves as a standby feedback line of the four feedback lines.
The utility model has the advantages that the traction substation adopts a single-phase traction transformer, a feedback line is additionally arranged on the side of the 27.5kV feeding line, the newly added feeder line supplies power to the traditional neutral section without electricity of the anchor section joint type electric phase splitting of the traction substation end, so that the terminal electric phase splitting is operated in an electric subsection mode, a train pantograph does not lose power and does not generate power loss and speed loss when entering the neutral section, and when the traction substation breaks down, quits the operation and is supplied with power by the adjacent traction substations, because the feeder line supplying power to the neutral section quits running along with the fault traction substation, the neutral section is naturally in a non-electricity state, the electric phase splitting at the end of the fault traction substation is restored to be operated in an electric phase splitting mode from an electric subsection, and the reverse connection process is naturally completed, the misoperation can be prevented, the safe and reliable running of the system is ensured, and the technical problem of large-ramp electric phase splitting is effectively solved; in addition, the uplink and downlink power supply lines for supplying power to the neutral section are respectively provided with an electric isolating switch, a lightning arrester and a power supply line, so that the flexibility of system operation is increased, and operation management and maintenance are facilitated.
Drawings
The specification includes the following four figures:
FIG. 1 is a schematic diagram of a 7-span anchor segment articulated electrical phase separation;
fig. 2 is a main wiring diagram of a traction substation in a traction power supply system structure applying a single-phase traction transformer according to the present invention;
FIG. 3 is a schematic diagram of the anchor section articulated electric split-phase power supply in the traction power supply system structure using the single-phase traction transformer of the present invention;
fig. 4 is a schematic diagram of the power supply system structure using single-phase traction transformer according to the present invention, which is used to supply power from adjacent traction substations when the traction substation is out of operation due to fault.
The figure shows the parts, the part names and the corresponding marks: an anchor post 1, a lower anchor branch contact net 2, a conversion post 3, a central post 4, a neutral section contact net 5, a conversion post 6, a conversion post 7, a central post 8, a conversion post 9, a working branch contact net 10, an anchor post 11, a single-phase traction transformer 12, a 27.5kV bus 13, a 27.5kV auxiliary bus 14, a 27.5kV current transformer 15, a 27.5kV circuit breaker 16, a 27.5kV electric isolating switch 17, a zinc oxide arrester 18, an online power supply line 19, an upstream neutral section power supply 20 from a traction substation, a downstream neutral section power supply 21 from the traction substation, a compound upstream neutral section contact net 22, a compound downstream neutral section contact net 23, a No. 1 traction substation 24, a No. 1 substation 25, a No. 2 traction substation 26, a No. 2 substation 27, a No. 3 traction substation 28, a No. 2 traction substation neutral section power supply line 29, a No. 2 traction substation end line 30, a No. 1 substation split-section electric isolating switch 31, Zone 2 is handed off to the electrical isolator switch 32.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1, when a train passes through an anchor section articulated electric phase splitting, a pantograph only contacts a neutral section contact net without electricity in the process from a central column 4 to a central column 8, the train loses electricity for a short time, power loss and speed loss are caused, and when the electric phase splitting is arranged in a long and large ramp section, accidents such as slope stopping and slope slowing can be caused seriously, so that the arrangement of the electric phase splitting in a long and large ramp electrified railway is often an important technical problem.
Referring to fig. 2, in order to solve the long and big ramp electric phase separation technological problem, the utility model relates to an use single-phase traction transformer's traction power supply system structure, including traction substation and the four feeder that return that supply left side power supply arm, right side power supply arm, traction substation adopts single-phase traction transformer, newly-increased one return feeder in its 27.5kV side, this newly-increased feeder is the homophase power supply with the feeder of left side power supply arm, right side power supply arm, supplies power through the neutral section that the anchor section articulated electricity phase that this newly-increased feeder was held to traction substation is uncharged, and is connected through auxiliary bus and left side power supply arm, the four feedback lines of right side power supply arm, as the reserve feeder of this four return feeder.
Referring to fig. 3, for the multi-line electrified railway, the uplink anchor section articulated electric split-phase neutral section and the downlink anchor section articulated electric split-phase neutral section are respectively supplied with power by a power supply which is sent to a traction substation and consists of different electric isolating switches, zinc oxide lightning arresters and an online power supply line. Referring to fig. 4, when the traction substation is out of operation due to a fault and the power is supplied by the traction substations on two adjacent sides through the subareas, the feeder line for supplying power to the anchor section joint type electric phase splitting neutral section of the fault traction substation is out of operation together with the traction substation, and the neutral section is naturally restored to the no-area.
In the normal operation condition, the articulated electric phase-splitting neutral section of the anchor section at the end of the traction substation is supplied with power through the newly-added feeder of the traction substation, when a train passes through, a pantograph is in contact with a neutral section overhead line system, power loss and speed loss can not be caused, meanwhile, the newly-added feeder can be taken as a standby feeder of other four feeders, equipment can be utilized to the maximum extent, investment is saved, and system operation efficiency is improved. Under the condition of a fault, the neutral section of the electric split phase at the end of the fault traction substation is recovered to be in a non-electric state from an electric state, and the electric split phase operation mode is recovered from an electric subsection operation mode, so that the reverse connection process is naturally completed, misoperation is prevented, and the safe and reliable operation of the system is ensured.
Referring to fig. 1, in the seven-span anchor section articulated electric phase separation, an anchor column 1 is used for suspending a lower anchor catenary 2 and a neutral section catenary 5, a train pantograph is only contacted with the lower anchor catenary 2, and the neutral section starts from the position. The conversion column 3 is used for hanging the lower anchor support contact net 2 and the neutral section contact net 5, and the pantograph of the train is only contacted with the lower anchor support contact net 2. The central column 4 is used for hanging the lower anchor support contact net 2 and the neutral section contact net 5, and the pantograph of the train is simultaneously contacted with the lower anchor support contact net 2 and the neutral section contact net 5. The conversion column 6 is used for hanging the lower anchor branch contact net 2, the neutral section contact net 5 and the working branch contact net 10, the pantograph of the train is only contacted with the neutral section contact net 5, and the working branch is arranged from the position; the conversion column 7 is used for hanging the lower anchor support contact net 2, the neutral section contact net 5 and the working support contact net 10, the pantograph of the train is only contacted with the neutral section contact net 5, and the lower anchor support is stopped from the position. The central column 8 is used for hanging a working branch contact network 10 and a neutral section contact network 5, and the pantograph of the train is simultaneously contacted with the working branch contact network 10 and the neutral section contact network 5. The conversion column 9 is used for hanging the working branch contact network 10 and the neutral section contact network 5, and the pantograph of the train is only contacted with the working branch contact network 10. The anchor post 11 is used for hanging the working branch contact net 10 and the neutral section contact net 5, the train pantograph is only contacted with the working branch contact net 10, and the neutral section is stopped from the position. The lower anchor branch contact net and the work branch contact net can be replaced by the anchor section articulated electric split phase, and the electric insulation of the power supply arms on the two sides is realized by the neutral section without electricity arranged in the anchor section articulated electric split phase.
Referring to fig. 2, a traction substation adopts a single-phase traction transformer 12, outputs a same-phase power supply to a segmented bus 13, and provides a standby for each feeder, a standby auxiliary bus 14 is arranged, a current transformer 15 and a circuit breaker 16 which are used for supplying power to an electric phase separation neutral section at the end of the traction substation are used as a feeder standby current transformer and a standby circuit breaker, and an electric isolating switch 17, a zinc oxide arrester 18 and an online power supply line 19 form a complete feeder for supplying power to the electric phase separation neutral section at the end of the traction substation together with the current transformer 15 and the circuit breaker 16.
Referring to fig. 3, a complete feeder line formed by the electric disconnecting switch 17, the zinc oxide arrester 18, the online power supply line 19, the current transformer 15 and the circuit breaker 16 of the traction substation is respectively provided for a compound line uplink neutral section contact network 22 and a compound line downlink neutral section contact network 23 by forming a power supply 20 and a power supply 21 by the two electric disconnecting switches 17, the two zinc oxide arresters 18 and the two online power supply lines 19.
Referring to fig. 4, when the traction substation No. 2 has a fault and is out of operation, the adjacent traction substation No. 1 24 is powered by closing the electric disconnector 31 for the zone No. 1 and the traction substation No. 3 is powered by closing the electric disconnector 32 for the zone No. 2 and the electric disconnector 25 for the zone No. 3. Because the No. 2 traction substation 26 fails and stops running, the neutral section feeder 29 of the traction substation is also in power loss and stops running, and the neutral section of the end electric phase section 30 of the traction substation is naturally in a non-power state.
The above description is only used for illustrating some principles of the traction power supply system structure of the single-phase traction transformer of the present invention, and it is not intended to limit the present invention to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the claims of the present invention.
Claims (2)
1. The utility model provides an use single-phase traction transformer's traction power supply system structure, includes traction substation and supplies the four feeder of left side power supply arm, right side power supply arm, characterized by: the traction substation adopts a single-phase traction transformer, a newly-added feedback line is arranged on the 27.5kV side of the traction substation, the newly-added feedback line, the feeders of the left power supply arm and the right power supply arm are in-phase power supplies, the articulated electric phase splitting neutral section of the anchor section at the end of the traction substation is supplied with power through the newly-added feedback line, and the articulated electric phase splitting neutral section is connected with four feedback lines of the left power supply arm and the right power supply arm through auxiliary buses and serves as a standby feedback line of the four feedback lines.
2. The traction power supply system structure using the single-phase traction transformer as claimed in claim 1, wherein: for the up anchor section joint type electric phase-splitting neutral section and the down anchor section joint type electric phase-splitting neutral section of the compound line electrified railway, the same newly added feeder line and different power supply lines are adopted for supplying power, namely, the power supply consisting of the same current mutual circuit breaker, different electric isolating switches, a zinc oxide lightning arrester and an on-line power supply line is adopted for supplying power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006135.XU CN211641916U (en) | 2019-11-19 | 2019-11-19 | Traction power supply system structure applying single-phase traction transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006135.XU CN211641916U (en) | 2019-11-19 | 2019-11-19 | Traction power supply system structure applying single-phase traction transformer |
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| CN211641916U true CN211641916U (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021098650A1 (en) * | 2019-11-19 | 2021-05-27 | 中铁二院工程集团有限责任公司 | Traction power supply system structure applying single-phase traction transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021098650A1 (en) * | 2019-11-19 | 2021-05-27 | 中铁二院工程集团有限责任公司 | Traction power supply system structure applying single-phase traction transformer |
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