CN106585429A - Novel non-electric-surge neutral-section passing system for electrified railways and control method of novel non-electric-surge neutral-section passing system - Google Patents
Novel non-electric-surge neutral-section passing system for electrified railways and control method of novel non-electric-surge neutral-section passing system Download PDFInfo
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- CN106585429A CN106585429A CN201510667956.1A CN201510667956A CN106585429A CN 106585429 A CN106585429 A CN 106585429A CN 201510667956 A CN201510667956 A CN 201510667956A CN 106585429 A CN106585429 A CN 106585429A
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Abstract
The invention relates to a novel non-electric-surge neutral-section passing system for electrified railways and a control method of the novel non-electric-surge neutral-section passing system. The novel non-electric-surge neutral-section passing system comprises a catenary transition section N, a catenary A, and a catenary B, wherein the catenary transition section N is arranged between the catenary A and the catenary B, and two ends of the catenary transition section N are in series connection with neutral-section isolators; electricity of the catenary A and electricity of the catenary B are supplied by a traction substation; electricity of the catenary transition section N is supplied by the inversion of a current converter; and detection sensors are separately mounted on two sides of each of the neutral-section isolators of the neutral-section passing system. In the neutral-section passing process of a locomotive, the amplitude and the phase of inversion output voltage of the current converter are adjusted, and the amplitude and the phase of the voltage of the catenary transition section N are kept to be the same as those of a front catenary and those of a rear catenary, so that the non-electric-surge neutral-section passing of the locomotive is realized. The novel non-electric-surge neutral-section passing system disclosed by the invention is simple in structure, low in investment, and convenient to operate, and non-power-off non-electric-surge neutral-section passing of the locomotive can be easy and convenient to realize.
Description
Technical field
The present invention relates to a kind of electric railway neutral-section passing system and its control method.More particularly to the voltage magnitude of transition and electric phase place in a kind of automatic change neutral-section passing system, eliminate locomotive cross split-phase surge new neutral-section passing system and its control method.
Background technology
The traditional tractive power supply system power supply mode of China railways uses single phase industrial frequence 25kV alternating currents, and by the contact net being erected above railway, locomotive or motor-car take stream using pantograph, and for trailer system electric energy is provided.In order to balance three phase supply load, contact net inevitably arranges electric split-phase facility.
Bending split-phase using drop needs train operator to carry out moving back level manually, close auxiliary unit, disconnected main circuit breaker, and train enters electroless state, and train inertia inertia crosses phase-separating section, then co-host break road device, closes auxiliary unit, enters level restoration power.Train completed phase process, needed between one section of longer non-Electric region of experience, and locomotive power is reduced, and crossed that split-phase efficiency is low, increased the working strength of driver, it is impossible to meet the development of train high speed.
Reduced without the electric time using automatic passing over of neutral section mode, without the need for driver operation, lifting bow need not be carried out, improved split-phase efficiency, but locomotive produces overcurrent and overvoltage in phase splitting folding split-phase switch, this can cause transient state to impact equipment of itself and electrical network, and overvoltage and shoving can cause damage, reduce the electric life of split-phase switch to Switch main body and circuit.
The content of the invention
The present invention realizes technical scheme that its first goal of the invention adopted for a kind of without the new electric railway neutral-section passing system of surge, including transverter；Three sections of contact nets：Contact net A, contact net B, contact net changeover portion N；Can detect, extract, transmitting the sensor of " locomotive passes through " information.Contact net changeover portion N is provided between contact net A and contact net B.The two ends series connection neutral section insulator of contact net changeover portion N.Contact net A and contact net B are powered by traction substation, and contact net changeover portion N is powered by transverter inversion.Detection sensor is separately installed with two side positions of the neutral section insulator of neutral-section passing system.
Transverter adopts voltage converter（VSC）Power supply, can change for two level converters, multilevel converter, modularization multi-level converter etc..
The present invention realizes technical scheme that its second goal of the invention adopted for a kind of to make the above-mentioned control method without the new electric railway neutral-section passing system of surge.After sensor collection transmission locomotive location information, according to locomotive location information, concrete rate-determining steps are：
1）Before locomotive enters contact net changeover portion N, transverter inverter voltage is controlled with the contact net being located with pressure, same frequency, same-phase；
2）Locomotive enter contact net changeover portion N after, transverter is locomotive power supply, and gradually adjust transverter inverter voltage amplitude, phase place, gradually level off to next section of contact net voltage amplitude and phase place；
3）Before locomotive enters next section of contact net, the amplitude and phase place of the voltage for completing and tracking next section of contact net, mistake split-phase of the locomotive without surge are adjusted.
The characteristics of general principle of the present invention is using transverter inverter voltage amplitude, phase-adjustable, powered to net-fault changeover portion N by transverter, during locomotive crosses split-phase, adjust transverter inverter output voltage amplitude and phase place, keep contact net changeover portion N identical with two sections of contact net voltage magnitudes, phase places in front and back, realize that locomotive crosses split-phase without surge.
Understand in sum, the present invention's has following technological merit without the new electric railway neutral-section passing system of surge：
1）Realize the undue phase of locomotive not power-off；
2）Powered to contact net neutrality transition zone using transverter inverter voltage, supply voltage amplitude and phase place is adjusted flexibly, realize that locomotive crosses split-phase without surge.
Description of the drawings
Fig. 1 is the present invention without the new electric railway neutral-section passing system structural representation Fig. 1 of surge.
Fig. 2 is the present invention without the new electric railway neutral-section passing system structural representation Fig. 2 of surge.
Fig. 3 is the present invention without the new electric railway neutral-section passing system structural representation Fig. 3 of surge.
Fig. 4 is the present invention without the new electric railway neutral-section passing system structural representation Fig. 4 of surge.
Specific embodiment
With reference to embodiment and compare accompanying drawing the present invention is described in further detail.
Embodiment 1：
As shown in accompanying drawing 1, the present invention's includes contact net A without the new electric railway neutral-section passing system structure of surge（Power supply zone is α phases）With contact net B（Power supply zone is β phases）, contact net transition N is provided between contact net A and contact net B.Connect neutral section insulator J1 between contact net A and contact net transition N, and connect neutral section insulator J2 between contact net B and contact net transition N.Contact net A and contact net B are respectively connected to traction substation SS, by the power voltage supply of different phase places.Contact net transition N is connected with transverter 1, and transverter 1 is powered to it.Detection sensor G1, G2 and G3, G4 that transmission " locomotive passes through " information can be extracted is installed in the corresponding position of neutral-section passing system.Sensor G1 is arranged on the left side of neutral section insulator J1, and sensor G2 is arranged on the right side of neutral section insulator J1；Sensor G3 is arranged on the left side of neutral section insulator J2, and sensor G4 is arranged on the right side of neutral section insulator J2.
Transverter 1 is voltage converter（VSC）, can be the transverters such as two level converters, multilevel converter, modularization multi-level converter.Transverter 1 is powered by dc source, is reverse into alternating voltage.
Assume contact net A supply voltage be
u α=U αcos(ω t+θ α)
The supply voltage of contact net B is
u β=U βcos(ω t+θ β)
In formulaU αWithU βRespectively contact net voltage magnitude,θ αWithθ βRespectively contact net voltage phase difference,ωRespectively contact net electric voltage frequency.By locking the voltage magnitude, frequency and the phase place that obtain contact net A and contact net B using PHASE-LOCKED LOOP PLL TECHNIQUE.
With reference to the operation conditions of locomotive, so that locomotive drives towards right side from left side as an example, using the above-mentioned method without the new electric railway neutral-section passing system of surge, its step is：
1）As shown in figure 1, locomotive drives towards neutral-section passing system into before contact net transition N, i.e., locomotive is in the left side of neutral section insulator J1 for locomotive state.Detected after locomotive location information by sensor G1, the control inversion of transverter 1 goes out alternating voltageu sWith contact net A with pressure, same frequency, synchronous single-phase alternating current, i.e.,：
u s=U scos(ω t +θ s)=u α=U αcos(ω t +θ α)
2）Locomotive state enters contact net transition N as shown in Fig. 2 locomotive drives towards neutral-section passing system by neutral section insulator J1, is detected after locomotive location information by sensor G2, and the control inversion of transverter 1 goes out alternating voltageu sFor：
u s=U scos(ω t +θ s)=(U α+Δu)cos[ω t + (θ α+Δθ)]
Control transverter 1 gradually adjusts the voltage magnitude and phase place of inversion output, the voltage magnitude adjustment amount Δ of transverter 1uThere is relation is：
Δu=(U β- U α)/ΔT
The voltage-phase adjustment amount Δ of transverter 1θThere is relation is：
Δθ=(θ β-θ α)/ΔT
Δ T is voltage magnitude adjustment amount ΔuWith voltage-phase adjustment amount ΔθAdjustment time, can be set according to locomotive running speed, it is desirable to which locomotive is by adjusting the inverter voltage of transverter 1 before neutral section insulator J2u s=u β, and lock transverter voltageu sWith contact net B with pressure, same frequency, same-phase；
3）Locomotive state into contact net B, is travelled, so as to complete to cross split-phase without surge as shown in figure 3, locomotive leaves contact net transition N by neutral section insulator J2 by contact net B for electric drive.
If locomotive drives towards left side from right side, by sensor G4, G3 perform detection, the task of transmission corresponding information, control control transverter 1 is completed and above-mentioned 1）、2）、3）Similar operating process, adjusts the inverter voltage amplitude and phase place of the output of transverter 1, finally realizes that locomotive crosses split-phase without surge.
Embodiment 2：
Fig. 4 illustrates that this example is essentially identical with the structure of embodiment one, and different is：Transverter 1 is formed by connecting back-to-back by rectifier and inverter, first waits until dc source from public electric wire net rectification by rectifier, then to inverter power supply, again inversion goes out to meet desired alternating voltage inverter.
Claims (3)
1. one kind is without the new electric railway neutral-section passing system of surge, including transverter；Three sections of contact nets：Contact net A, contact net B, contact net changeover portion N；Can detect, extract, transmitting the sensor of " locomotive passes through " information；It is characterized in that：Contact net changeover portion N is provided between contact net A and contact net B；The two ends series connection neutral section insulator of contact net changeover portion N；Contact net A and contact net B are powered by traction substation, and contact net changeover portion N is powered by transverter inversion；Detection sensor is separately mounted in two side positions of the neutral section insulator of neutral-section passing system.
2. according to claim 1 without the new electric railway neutral-section passing system of surge, it is characterised by：Transverter is voltage converter（VSC）, can be the transverters such as two level converters, multilevel converter, modularization multi-level converter.
3. the control method without the new electric railway neutral-section passing system of surge according to claim 1 and claim 2, its step is：
1）Before locomotive enters contact net changeover portion N, transverter inverter voltage is controlled with the contact net being located with pressure, same frequency, same-phase；
2）Locomotive enter contact net changeover portion N after, transverter is locomotive power supply, and gradually adjust transverter inverter voltage amplitude, phase place, gradually level off to next section of contact net voltage amplitude and phase place；
3）Before locomotive enters next section of contact net, the amplitude and phase place of the voltage for completing and tracking next section of contact net, mistake split-phase of the locomotive without surge are adjusted.
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| CN201510667956.1A CN106585429A (en) | 2015-10-16 | 2015-10-16 | Novel non-electric-surge neutral-section passing system for electrified railways and control method of novel non-electric-surge neutral-section passing system |
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| CN201510667956.1A CN106585429A (en) | 2015-10-16 | 2015-10-16 | Novel non-electric-surge neutral-section passing system for electrified railways and control method of novel non-electric-surge neutral-section passing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109484254A (en) * | 2018-12-04 | 2019-03-19 | 武汉大学 | A kind of power supply topological structure and control method for crossing split-phase for high speed rail system |
| CN110001457A (en) * | 2019-04-18 | 2019-07-12 | 成都尚华电气有限公司 | A kind of power train does not power off excessive section control system and its method |
| CN114851920A (en) * | 2022-04-15 | 2022-08-05 | 西南交通大学 | Flexible passing neutral section device of electrified railway and control method |
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| CN202507952U (en) * | 2012-03-06 | 2012-10-31 | 南车株洲电力机车有限公司 | Automatic neutral section passing device for train |
| CN103818271A (en) * | 2014-01-26 | 2014-05-28 | 西南交通大学 | Cascaded multi-level-based ground overvoltage phase splitting device |
| CN104943566A (en) * | 2014-03-25 | 2015-09-30 | 阿尔斯通运输科技简易股份公司 | Ground level power supply system for a non-guided electric vehicle and corresponding method of use |
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Patent Citations (5)
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| KR20110116811A (en) * | 2010-04-20 | 2011-10-26 | 한국철도기술연구원 | Contactless and automatic power switching system in dead section and method thereof |
| CN201914123U (en) * | 2011-01-24 | 2011-08-03 | 靳来生 | Uninterruptible power neutral-section passing warning system of electric locomotive |
| CN202507952U (en) * | 2012-03-06 | 2012-10-31 | 南车株洲电力机车有限公司 | Automatic neutral section passing device for train |
| CN103818271A (en) * | 2014-01-26 | 2014-05-28 | 西南交通大学 | Cascaded multi-level-based ground overvoltage phase splitting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109484254A (en) * | 2018-12-04 | 2019-03-19 | 武汉大学 | A kind of power supply topological structure and control method for crossing split-phase for high speed rail system |
| CN110001457A (en) * | 2019-04-18 | 2019-07-12 | 成都尚华电气有限公司 | A kind of power train does not power off excessive section control system and its method |
| CN110001457B (en) * | 2019-04-18 | 2024-02-06 | 成都尚华电气有限公司 | Power train uninterrupted power section control system and method thereof |
| CN114851920A (en) * | 2022-04-15 | 2022-08-05 | 西南交通大学 | Flexible passing neutral section device of electrified railway and control method |
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