CN111422104A - Partition structure applied to double-side power supply mode of alternating current complex line electrified railway - Google Patents
Partition structure applied to double-side power supply mode of alternating current complex line electrified railway Download PDFInfo
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- CN111422104A CN111422104A CN202010233168.2A CN202010233168A CN111422104A CN 111422104 A CN111422104 A CN 111422104A CN 202010233168 A CN202010233168 A CN 202010233168A CN 111422104 A CN111422104 A CN 111422104A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/13—Trolley wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
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- Engineering & Computer Science (AREA)
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Abstract
The power supply structure is applied to a partition structure of a bilateral power supply mode of an alternating-current compound line electrified railway, and can maintain the power supply function of the tail end contact network parallel connection of the power supply arm under the normal condition and the power supply function of the adjacent traction substation under the condition that the traction substation breaks down and quits the operation. A circuit breaker mode adopted by a subarea station realizes parallel power supply of an uplink and downlink contact network and bilateral power supply of a left and right side power supply arm, a group of voltage transformers, lightning arresters and a return 27.5kV feeder are respectively added on a left and right side power supply bus of the subarea station, the voltage transformers are used as a newly-added feeder power supply side detection device of the buses on both sides, the lightning arresters are used as voltage transformer overvoltage protection devices, two return newly-added feeders are respectively in-phase power supplies with a left side power supply arm and a right side power supply arm contact network, an articulated electric phase neutral section at a tail end anchor section of each power supply arm between two adjacent traction substations and are supplied with power, and the two newly-added feeders can.
Description
Technical Field
The invention relates to an alternating current electrified railway traction power supply system, in particular to a partition structure applied to a double-line bilateral power supply mode.
Background
The electrified railways in China all adopt an alternating current system and a single-side power supply mode, and for the multi-line electrified railways, subareas are arranged between two adjacent traction substations and at the tail ends of power supply arms, so that the parallel power supply at the tail ends of the power supply arms under the normal condition and the cross-area power supply of the adjacent traction substations under the condition that the traction substations are out of operation due to faults are realized. Single-side power supply namely: an electric phase splitting device is arranged between two adjacent traction substations and at the tail end of a power supply arm for insulation division, an electric power supply subarea of the overhead line system is supplied with electric energy from one side of the traction substations, and electric traction loads (locomotives or motor cars) only obtain the electric energy from one traction substation in the running process. Corresponding to the single-side power supply mode, there is a double-side power supply mode in the technology, namely: an electric phase splitting device between two adjacent traction substations and at the tail end of a power supply arm is omitted, electric energy is supplied to a power supply subarea of the overhead line system from two sides of the two adjacent traction substations, and electric energy can be obtained from the two adjacent traction substations when an electric traction load (a locomotive or a motor car) runs. The bilateral power supply technology is widely used abroad (Russia, Germany, eastern Europe and the like), practices prove that the technology is feasible, the power supply capacity can be effectively improved, and the number of electric phase separation is reduced, but the technology is not applied to domestic alternating current electrified railways due to clear boundaries of management and operation between domestic public power grids and railways and difficulty in exceeding and fusing.
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.
The terrain along the mountain area electrified railway, geological conditions are usually complex, the proportion of bridges and tunnels is often very high, if the Chuangxiang line exceeds 90%, the set conditions of traction transformers are difficult, the operation and maintenance difficulty of a traction network (consisting of a contact network and a return conductor) is large, in order to solve the problems, on one hand, a traction network power supply mode with a simple structure is needed to be adopted, so that the operation and maintenance workload is reduced, on the other hand, a power supply mode capable of effectively improving the power supply capacity is also needed to be adopted, the distance between traction substations is prolonged, the number of the traction substations is reduced, and the traction transformers are prevented from being arranged in space limited engineering facilities in zones with poor geological terrain conditions or tunnels and the like.
By applying the bilateral power supply technology, on one hand, the electric phase splitting arranged at the tail end of a power supply arm between two adjacent traction substations in the traditional unilateral power supply mode can be cancelled, on the other hand, the power supply capacity of a traction power supply system can be greatly improved under the condition of adopting a direct power supply mode with a return line with a simple structure, so that the arrangement of the electric phase splitting can be greatly reduced, the operation and maintenance difficulty can also be reduced, meanwhile, the distance between the traction substations can be effectively prolonged, the number of the traction substations can be reduced, the traction substations are prevented from being arranged in space-limited engineering facilities such as zones with poor geological and topographic conditions or tunnels, and the technical problem faced by the mountain long and steep ramp electrified rail.
With the continuous deepening of domestic reform, the situation of traditional industry segmentation is changing, more power and railway enterprises are integrated into market economy, and the integration and cooperation among the power and railway enterprises are tighter, so that conditions are created for the application of the bilateral power supply technology in domestic alternating current electrified railways; in addition, as a large-ramp multi-line electrified railway in mountainous areas such as the tibetan railway and the like which are built under special environmental conditions, urgent needs are also provided for the application of the bilateral power supply technology.
The method is characterized in that a partition structure applied to a double-side power supply mode of the alternating-current multi-line electrified railway is provided by combining a long-term running condition and a double-side power supply implementation scheme of the electrified railway in China, aiming at a partition station arranged between two adjacent traction substations of the multi-line electrified railway and at the tail end of a power supply arm at present, on one hand, the parallel power supply at the tail end of the power supply arm under a normal condition and the cross-area power supply function of the adjacent traction substations under the condition that the traction substations are out of operation due to faults can be kept through the partition station, on the other hand, the normal condition and the double-side power supply mode can be realized, and the function requirements.
Disclosure of Invention
The invention aims to solve the technical problem of providing a partition structure applied to a double-side power supply mode of an alternating-current compound line electrified railway, which can maintain the functions of parallel power supply of a contact network at the tail end of a power supply arm under the normal condition and over-area power supply of an adjacent traction substation under the condition that the traction substation fails and exits from operation, can realize the operation of the traction network according to the double-side power supply mode under the normal condition and the recovery of the traction network into the traditional single-side power supply mode under the condition that the traction network fails, can solve the power supply problem of the double-side compound line electrified railway in a large slope in a mountainous area, can effectively control the accident range, and is compatible.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a partition structure applied to double-side power supply of a multi-line electrified railway, which is characterized in that: the branch station adopts the circuit breaker mode to realize the parallel power supply of an uplink and downlink contact network and the bilateral power supply of a left side power supply arm and a right side power supply arm, a group of voltage transformers, lightning arresters and a return 27.5kV feeder are respectively added to a left side power supply bus and a right side power supply bus, the voltage transformers are used as a newly-added feeder power supply side detection device of the buses at two sides, the lightning arresters are used as voltage transformer overvoltage protection devices, the two return newly-added feeders are respectively in-phase power supplies with the left side power supply arm and the right side power supply arm contact network, the articulated electric phase neutral section at the tail end anchor section of the power supply arm and between two adjacent traction substations are supplied with power through the two.
The invention has the beneficial effects that under normal conditions, the left side and right side uplink and downlink parallel circuit breakers are closed, so that the parallel power supply of the uplink and downlink contact networks of the power supply arms on two sides is realized, on the basis of maintaining the function, the left side bus and the right side bus of the zoning station are electrified, the electric isolating switch between the buses is in a closed state, the traction network operates according to a bilateral power supply mode, a traction load (a locomotive or a motor car) can simultaneously obtain electric energy from traction substations on two adjacent sides, at the moment, a traditional neutral section without electricity in the articulated electric phase separation between the adjacent traction substations and at the tail end of the power supply arm is supplied with power through a newly added feeder, so that the tail end electric phase separation becomes an electric subsection mode to operate, and a train pantograph cannot lose electricity or generate power loss and speed loss when entering the; under the condition of a fault, if the fault type is that a traction substation is out of operation due to a fault, closing electric isolating switches across the buses on the left side and the right side of the substation to realize the power supply across the adjacent traction substations, on the basis of maintaining the function, when the fault type is that a traction network of a power supply arm on one side has a permanent fault, the power supply arm bus on the fault side of the substation is not electrified, the electric isolating switches across the buses are in an open state, the traction network is recovered to be operated in a traditional single-side power supply mode, at the moment, a newly-added feeder line for supplying power to a neutral section is tripped, the neutral section is in an electroless state, and electric phase splitting between two adjacent traction substations and at the tail ends of the power supply arms. Therefore, the cross-area power supply function of the adjacent traction substation under the conditions that the tail end of the power supply arm is in parallel power supply and the traction substation is out of operation due to faults is maintained under the normal condition, the traction network can be operated according to the double-side power supply mode under the normal condition, the operation function of the traditional single-side power supply mode can be recovered under the condition that the traction network is in faults, the problem of power supply of the large-slope multi-line electrified railway in a mountain area can be solved, the accident range can be effectively controlled, and the power supply system is compatible with the traditional single-.
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 subarea in the subarea structure applied to the bilateral power supply mode of the AC multiple-line electrified railway of the invention;
FIG. 3 is a schematic diagram of articulated electric split-phase power supply of an anchor section in a partition structure applied to a bilateral power supply mode of an AC multi-line electrified railway;
FIG. 4 is a schematic diagram showing the power supply relationship between the adjacent traction substations and the subarea station in the subarea station structure of the double-side power supply mode of the AC double-line electrified railway according to the present invention;
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 second conversion post 6, a third conversion post 7, a second central post 8, a fourth conversion post 9, a work branch contact net 10, a second anchor post 11, a left side uplink contact net parallel circuit breaker 12, a left side downlink contact net parallel circuit breaker 13, a right side uplink contact net parallel circuit breaker 14, a right side downlink contact net parallel circuit breaker 15, a cross-region isolating switch 16, a 27.5kV voltage transformer 17, a zinc oxide arrester 18, a 27.5kV three-station isolating switch 19, a 27.5kV circuit breaker 20, a 27.5kV current transformer 21, a tank type arrester 22, a 27.5kV electric isolating switch 23, an upper network power supply line 24, an upper neutral section power supply 25 from a subarea, a lower neutral section power supply 26 from a subarea, a compound line uplink neutral section 27, a compound line downlink neutral section 28, a double line, The system comprises a No. 1 traction substation 29, an adjacent No. 2 traction substation 30, an anchor section articulated electric phase separation 31 and a subarea substation 32 near the anchor section articulated electric phase separation.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Referring to fig. 1, when a train passes through an anchor section articulated electric phase separation, a pantograph only contacts a neutral section contact net without electricity in the process from a central column 4 to a second central column 8, the train loses electricity for a short time, power loss and speed loss are caused, and when the electric phase separation is arranged in a long and large ramp section, accidents such as slope stop and slope slowing can be caused in severe cases, so that the arrangement of the electric phase separation in a long and large ramp electrified railway is often an important technical problem.
Referring to fig. 2, in order to solve the power supply problem of the multi-track electrified railway in the large slope of the mountain area, on the basis of maintaining the power supply function of the parallel connection of the tail ends of the power supply arms under the normal condition and maintaining the power supply function of the cross-area of the adjacent traction substation under the condition that the traction substation is out of operation due to faults, the power supply is realized on both sides under the normal condition, and the power supply is recovered to the traditional single-side power supply mode under. The invention is applied to a partition structure of a bilateral power supply mode of an alternating current complex line electrified railway, and the partition structure comprises: under normal conditions, the left side and right side uplink and downlink parallel circuit breakers are closed, so that the uplink and downlink contact networks of the power supply arms on two sides are powered in parallel, on the basis of keeping the function, the cross-area electric isolating switch between the left side bus and the right side bus is closed, the traction network operates in a bilateral power supply mode, and traction loads (locomotives or motor cars) can simultaneously obtain electric energy from traction substations on two adjacent sides; under the condition of a fault, if the fault type is that the traction substation is in fault and quits operation, the cross-area electric isolating switch between the left bus and the right bus of the subarea substation is closed, so that the cross-area power supply of the adjacent traction substations is realized, on the basis of keeping the function, when the fault type is that the traction network of the power supply arm on one side has a permanent fault, the power supply arm bus on the fault side of the subarea substation is not electrified, the cross-area electric isolating switch on the bus is in an open state, and the traction network is recovered to be operated in a traditional single-side.
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 supplied with power from a power supply to a subarea, wherein the power supply is composed of a three-position isolating switch, a circuit breaker, a current transformer, a tank type lightning arrester, an electric isolating switch and an internet power supply line, and newly added feeders on the left side and the right side can be mutually standby.
Referring to fig. 4, for a compound line electrified railway, anchor section articulated electric phase separation is arranged on contact nets between two adjacent traction substations and at the position of a tail end power supply arm, a subarea station is arranged near the anchor section articulated electric phase separation, the subarea station can respectively communicate uplink and downlink contact nets of the power supply arms at two sides by closing a parallel circuit breaker to realize the parallel power supply of the uplink and downlink contact nets, and if the traction substations are in failure and quit operation, the subarea station realizes the cross-area power supply of the adjacent traction substations by closing a cross-area electric isolating switch. Under normal conditions, the parallel circuit breakers and the over-area electric isolating switches are closed by the subareas, meanwhile, the subareas supply power to the anchor section articulated electric phase splitting neutral section through the newly added feeders, the traction network runs according to a bilateral power supply mode, the anchor section articulated electric phase splitting on the contact network runs according to an electric segmentation mode, the traction load (a locomotive or a motor car) can simultaneously obtain electric energy from adjacent two side traction substations, and when a train passes through the electric phase splitting, a pantograph is in contact with a neutral section overhead line system, so that no power loss and no speed loss can be generated; when a permanent fault occurs in one traction network, a power supply arm bus at the fault side of a subarea is not electrified, an electric isolating switch at the cross-area of the subarea is opened, a newly increased feeder line trips, a neutral section is in an electroless state, the traction network recovers to operate in a traditional single-side power supply mode, and an articulated electric phase splitting between two adjacent traction substations and at the tail end of a power supply arm recovers to operate in an electric phase splitting mode.
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 second conversion column 6 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 working support is arranged from the position; the third 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 second 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 fourth 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 second anchor post 11 is used for hanging the working branch contact net 10 and the neutral section contact net 5, the pantograph of the train 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 working branch contact net can be replaced by the anchor section articulated electric split phase, and the electric insulation of two adjacent power supply arms is realized by the neutral section without electricity arranged in the anchor section articulated electric split phase.
Referring to fig. 2, a complete 27.5kV feeder line is composed of a 27.5kV three-station isolating switch 19, a 27.5kV circuit breaker 20, a 27.5kV current transformer 21, a tank-type arrester 22, a 27.5kV electric isolating switch 23, and an upper power supply line 24, a feeder line composed of a main body of a left-side upper contact net parallel circuit breaker 12 and a left-side lower contact net parallel circuit breaker 13 of a closed section can realize parallel power supply of a left-side power supply arm, a feeder line composed of a main body of a right-side upper contact net parallel circuit breaker 14 and a right-side lower contact net parallel circuit breaker 15 of a closed section can realize parallel power supply of a right-side power supply arm, a closed cross-area isolating switch 16 can realize cross-area power supply of adjacent power supply arms on left and right sides, a set of 27.5kV voltage transformer 17, a zinc oxide arrester 18 and a 27.5kV feeder line are, the lightning arrester is used as an overvoltage protection device of the voltage transformer, the two newly added feeders and contact networks of the left power supply arm and the right power supply arm are respectively in-phase power supplies, joint type electric phase splitting neutral sections between two adjacent traction substations and at the tail end of the power supply arm are supplied with power through the two newly added feeders, and the two newly added feeders can be mutually standby.
Referring to fig. 3, 27.5kV three-station disconnecting switch 19, 27.5kV breaker 20, 27.5kV current transformer 21, tank lightning arrester 22, 27.5kV electric disconnecting switch 23, and online power supply line 24 of the zoning station constitute a complete 27.5kV feeder, and newly added feeders for the left and right buses of the zoning station constitute an uplink neutral section power supply 25 supplied to the zoning station and a downlink neutral section power supply 26 supplied to the zoning station, which are respectively supplied to a compound line uplink neutral section overhead line system 27 and a compound line downlink neutral section overhead line system 28.
Referring to fig. 4, in the multi-line electrified railway, an anchor section articulated electric phase separation 31 is arranged on a contact net between a traction substation No. 1 29 and an adjacent traction substation No. 2 30 and at a tail end power supply arm, and a subarea substation 32 near the anchor section articulated electric phase separation is arranged.
The foregoing is illustrative of the principles of the present invention as applied to a multi-line dual-side powered partition configuration and is not intended to limit the invention to the exact construction and operation shown and described, and accordingly, all modifications and equivalents that may be resorted to are intended to fall within the scope of the invention.
Claims (3)
1. The partition structure applied to the double-side power supply mode of the alternating-current compound line electrified railway is characterized in that: a circuit breaker mode is adopted in a subarea station to realize parallel power supply of an uplink and downlink contact network and bilateral power supply of a left and right side power supply arm, a group of voltage transformers, lightning arresters and a return 27.5kV feeder line are respectively added to a left and right side power supply bus of the subarea station, the voltage transformers are used as two newly-added feeder line power supply side voltage detection devices, the lightning arresters are used as voltage transformer overvoltage protection devices, two return newly-added feeder lines, contact networks of the left side power supply arm and the right side power supply arm are respectively in-phase power supplies, and articulated electric phase separation neutral sections at tail end anchor sections of the power supply arms between two adjacent traction substations and are supplied.
2. The partition structure applied to double-side power supply of the double-line electrified railway according to claim 1, wherein: for a compound 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 supplied with power by a power supply consisting of a three-station isolating switch, a circuit breaker, a current transformer, a tank type lightning arrester, an electric isolating switch and an internet power supply line from a subarea, and newly added feeder lines on buses on the left side and the right side are mutually standby.
3. The partition structure applied to double-side power supply of the double-line electrified railway according to claim 1, wherein: on the basis of maintaining the power supply function of the tail end of the power supply arm in parallel connection under the normal condition of the regional station and the power supply function of the adjacent traction substation under the condition that the traction substation is out of operation due to faults, the traction network can operate in a bilateral power supply mode under the normal condition and can be recovered to the conventional unilateral power supply mode under the condition that the traction network is in faults.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010233168.2A CN111422104A (en) | 2020-03-29 | 2020-03-29 | Partition structure applied to double-side power supply mode of alternating current complex line electrified railway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010233168.2A CN111422104A (en) | 2020-03-29 | 2020-03-29 | Partition structure applied to double-side power supply mode of alternating current complex line electrified railway |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775782A (en) * | 2020-07-22 | 2020-10-16 | 西南交通大学 | Electrified railway traction emergency guarantee power supply system and control method |
| CN114825587A (en) * | 2022-04-07 | 2022-07-29 | 西南交通大学 | Double-side traction power supply single-tree external power supply backup power supply structure and control method |
| WO2023173783A1 (en) * | 2022-03-17 | 2023-09-21 | 西南交通大学 | Traction network bilateral power supply ride-through power utilization system, and control method |
-
2020
- 2020-03-29 CN CN202010233168.2A patent/CN111422104A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775782A (en) * | 2020-07-22 | 2020-10-16 | 西南交通大学 | Electrified railway traction emergency guarantee power supply system and control method |
| WO2023173783A1 (en) * | 2022-03-17 | 2023-09-21 | 西南交通大学 | Traction network bilateral power supply ride-through power utilization system, and control method |
| CN114825587A (en) * | 2022-04-07 | 2022-07-29 | 西南交通大学 | Double-side traction power supply single-tree external power supply backup power supply structure and control method |
| CN114825587B (en) * | 2022-04-07 | 2023-04-25 | 西南交通大学 | Dual-side traction power supply single-tree external power supply backup power switching structure and control method |
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