CN103832293A - Traction return current balancing device and method for railway electrified section - Google Patents
Traction return current balancing device and method for railway electrified section Download PDFInfo
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- CN103832293A CN103832293A CN201410073654.7A CN201410073654A CN103832293A CN 103832293 A CN103832293 A CN 103832293A CN 201410073654 A CN201410073654 A CN 201410073654A CN 103832293 A CN103832293 A CN 103832293A
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Abstract
The invention discloses a traction return current balancing device and method for a railway electrified section. The traction return current balancing device comprises an unbalance testing module and an impedance adjusting module. The unbalance testing module is connected to two ends of a choke transformer traction ring, and the impedance adjusting module is connected between a steel rail and the choke transformer traction ring. The unbalance testing module collects the traction return current in the steel rail, analyzes the sampled data, and displays the unbalanced degree of the traction return current and impedance adjustment advises. The impedance adjusting module adjusts the impedance according to the impedance adjustment advises to minimize the unbalanced degree. By the aid of the device, balance adjustment of the steel rail traction return current in the railway electrified section can be implemented, on the premise that the smoothness of the steel rail traction return current is free of being influenced, the unbalanced degree of the steel rail traction return current is reduced, and operating stability of a track circuit and vehicular device.
Description
Technical field
The present invention relates to a kind of traction current balancing device for railway electrification section, also relate to a kind of traction current balance method based on this device simultaneously, belong to railway signal technology field.
Background technology
Railway is national communication transport lifeblood, and railway signal system is commander, the system of controlling train operation, is the key equipment of guarantee railway safety and efficiently orderly function.In railway signal system, check that take/idle track circuit of section is the key foundation equipment of whole signal system, the safety of direct relation signal system, reliable operation.
Railway electrification section is provided with traction substation, and traction current is delivered to contact system by traction substation, and train is connected and obtains traction power source with contact system by pantograph.Train, in the time using traction power source, has produced the harmonic current of wide spectrum.This electric current is connected to rail with train earial drainage wheel, and returns traction substation by rail.Harmonic current on this rail is traction current.Along with the fast development of railway transportation cause, the increase of the weight of train and train speed, the traction current of electric locomotive increases thereupon.Article two, the traction current of rail, because overbalance can cause interference to track circuit and mobile unit, especially disturbs the most serious to the conductance of track circuit.If do not take certain safeguard procedures, not only can affect the normal work of track circuit, and can cause mobile unit fault cause brake.
For solving the interference problem of traction current to track circuit, generally take following measure: the one, track circuit will have certain anti-unbalance interference performance.Be 60A as just required its anti-unbalance electric current in the technical standard of 25Hz phase detecting track circuit.The 2nd, the rail connection lead of the impedances such as employing,, in that long one steel rail connection lead, around entering part copper core, equates the resistance of two one steel rail connection leads.The 3rd, adjust leak resistance, as cleaned railway roadbed, change insulation spacer under rail etc., make great efforts the balance of the earial drainage over the ground that keeps rail return current.But at section with a switch or switches, because of reasons such as switch structures, the overbalance of rail impedance cannot be adjusted.Can there are like this some drawbacks: the one, increase maintenance workload.In bend location, more serious than inner side rail because of outside rail abrasion, the conduction bits slag wearing away is more, causes resistance over the ground to reduce, and causes traction current overbalance.Therefore need often to clear up the work such as railway ballast, strengthened work capacity.The 2nd, there is blindness in overbalance.At section with a switch or switches, due to reasons such as switch structures, rail impedance can not equate.Even for equating, result remains and can not make traction current equate by rail connection lead impedance design.The caused interference of traction current still exists, and even also can improve the overbalance degree of rail return current.
Summary of the invention
For the deficiencies in the prior art, primary technical matters to be solved by this invention is to provide a kind of traction current balancing device for railway electrification section.
Another technical matters to be solved by this invention is to provide a kind of traction current balance method based on said apparatus.
For achieving the above object, the present invention adopts following technical scheme:
For a traction current balancing device for railway electrification section, comprise overbalance test module and impedance adjusting module; Described overbalance test module is connected to the two ends of impedance transformer traction circle, and described impedance adjusting module is connected between rail and impedance transformer traction circle;
Described overbalance test module gathers the traction current in rail, and sampled data is analyzed, and shows lack of balance and the impedance adjustment suggestion of traction current; Described impedance adjusting module is adjusted impedance according to described impedance adjustment suggestion, makes lack of balance reach minimum.
Wherein more preferably, described overbalance test module comprises current acquisition unit, amperometry unit and data display unit;
Described current acquisition unit connects the two ends of impedance transformer traction circle, and described amperometry unit is connected with described data display unit with the electric unit of described current acquisition respectively;
Described current acquisition unit gathers the traction current in rail and sampling data transmitting is delivered to described amperometry unit, and described amperometry unit is analyzed described sampled data, draws lack of balance curve and impedance adjustment suggestion; Described data display unit shows impedance adjustment suggestion and lack of balance curve.
Wherein more preferably, described impedance adjusting module is to have the many grades of rail connection leads of adjusting impedance.
Wherein more preferably, described rail connection lead is four, is connected to the two ends of the impedance transformer traction circle of signal receiver and/or apparatus for transmitting signal.
For a traction current balance method for railway electrification section, comprise the steps:
Gather the traction current in rail;
Sampled data is analyzed, drawn lack of balance and the impedance adjustment suggestion to rail connection lead;
Adjust the impedance of rail connection lead according to described impedance adjustment suggestion, make described lack of balance reach minimum.
Wherein more preferably, described lack of balance is the electric current difference at impedance transformer traction circle two ends.
Wherein more preferably, described sampled data is carried out to spectral analysis, carry out extraction and analysis for the component in mobile unit frequency band range, thereby judge disturbance variable in frequency band.
Wherein more preferably, in the time adjusting the impedance of rail connection lead, the impedance of the rail connection lead to apparatus for transmitting signal and/or signal receiver two ends is adjusted respectively.
Traction current balancing device and method thereof for railway electrification section provided by the present invention, do not affecting under the prerequisite that rail traction current is unobstructed, can realize the balanced adjustment of railway electrification section rail traction current, reduce the lack of balance of rail traction current, improved the functional reliability of track circuit and mobile unit.
Brief description of the drawings
Fig. 1 is the principle of work schematic diagram of traction current balancing device provided by the present invention;
Fig. 2 is the connection diagram that the present invention is applied to railway electrification section.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Referring to Fig. 1, traction current balancing device provided by the invention comprises overbalance test module and impedance adjusting module.Wherein overbalance test module comprises current acquisition unit, amperometry unit and data display unit.Amperometry unit is connected with data display unit with current acquisition electricity unit respectively.Current acquisition unit connects the two ends of impedance transformer traction circle, gathers the traction current in rail and sampling data transmitting is delivered to amperometry unit.Amperometry unit is analyzed the sample rate current of current acquisition unit, draws lack of balance curve and impedance adjustment suggestion.Data display unit shows impedance adjustment suggestion and lack of balance curve.Impedance adjustment unit carries out impedance adjustment according to the impedance adjustment suggestion of data display unit and lack of balance curve.The impedance of rail can affect the curent change in rail, and then realize the balance of traction current in rail after adjusting.Below this is described in detail.
Referring to Fig. 2, in figure, traction current comprises I, I1, I2, I3, I4, IA, IB.ID1 and ID2 are traction current flow back to traction substation on rail time, the electric current of sewing to the earth.Rail traction current I draws after circle by impedance transformer, on two one steel rails of circuit, be divided into rail current I1, I2, due to rail impedance RG1-2 difference, rail earth impedance RD1-2 difference and rail connection lead impedance RL1-2 difference, make electric current I A, the IB of entering signal transmitting apparatus end impedance transformer traction circle both sides unequal.Traction current IA, IB all produce induced signal on impedance transformer signal roundel, but phase place is contrary, and the induction that traction current IA, IB produce at impedance transformer signal roundel is cancelled out each other.In the time of IA ≠ IB, IA and IB can not offset completely in the induction of impedance transformer signal roundel, and this remanent induction electric current after having offset is exactly interfering signal concerning track circuit.As can be seen here, make IA equate just can reduce the interference of traction current to signalling set with IB as far as possible.IA, IB get over overbalance, larger to the interference of signalling set.
In one embodiment of the invention, the overbalance test module of traction current balancing device comprises current acquisition unit, amperometry unit and data display unit.Wherein current acquisition unit adopts split core type current transformer, is connected on respectively the both sides of impedance transformer traction circle.This current acquisition unit gathers electric current I A, the IB at impedance transformer traction circle two ends simultaneously, and electric current is sampled, sent data to amperometry unit after filtering, A/D conversion.
Before address, the impedance of rail connection lead directly affects the balance of rail traction current.Lack of balance is tested according to the sampled data of current acquisition unit in amperometry unit, and provides the impedance adjustment suggestion of rail connection lead.This impedance adjustment suggestion can be made according to custom circuit principle.Carrying out impedance with an one steel rail connection lead is below adjusted into example and describes.If for example IA > IB, suggestion reduces the impedance of IB place rail connection lead, thereby IB increase, IA are reduced, and dwindles IA and IB difference, improves the balance of traction current.According to the actual conditions of lack of balance and rail connection lead, those of ordinary skill in the art also can propose other impedance adjustment suggestion, does not just describe in detail at this.
The IA of amperometry unit received current collecting unit, the sampled data of IB electric current, first according to sampled data analysis the lack of balance of testing traction current.Unbalanced traction current is weighed by lack of balance, i.e. the electric current difference IA-IB at impedance transformer traction circle two ends.First amperometry unit contrasts electric current I A and IB, draws the difference of IA and IB, and then the current information of the difference to IA and IB is sampled and spectral analysis.When spectral analysis, need to carry out extraction and analysis for the component in mobile unit frequency band range, thereby judge disturbance variable in frequency band.Because overbalance traction current is that the interference of other frequency ranges is invalid on 495Hz～905Hz, 1689Hz～1711Hz, 1989Hz～2011Hz, 2289Hz～2311Hz, these frequency bands of 2589Hz～2611Hz to effective interference of mobile unit.In order to ensure the reliability of mobile unit, disturbance variable is carried out to spectral analysis and be necessary.In the time that the brake of mobile unit fault is disturbed and caused in traction current initiation, the overbalance test result of the monitoring record of comparative analysis mobile unit and amperometry unit, can investigate thoroughly disturbed condition fast, processes accurately for disturbed condition simultaneously.
In one embodiment of the invention, preferably adopt four one steel rail connection leads.As shown in Figure 2, four one steel rail connection leads are adjustable connection lead.Setting range can be larger so on the one hand, is convenient on the other hand the configuration of product manufacture and maintenance standby redundancy.Because the ability of utilizing rail connection lead to carry out overbalance adjustment is limited, therefore only use rail connection lead to adjust traction current, make it complete equilibrium unrealistic, even also impossible.On the other hand, because track circuit equipment itself has the antijamming capability of 60A unbalanced current, so in the ordinary course of things, by adjusting the impedance of rail connection lead, make the unbalanced interference of traction current in track circuit equipment allowed band, can solve so most problems.If the monolateral ground connection of rail, also must carry out railway roadbed cleaning or eliminate the faults such as earth point short circuit, this situation is only a few.In the present invention, regulate and do not have accurate numerical value to instruct for unbalanced current, just provide and adjust suggestion according to the analysis data of amperometry unit.Whole adjustment process can be by manually controlling.
Data display unit shows the adjustment suggestion of amperometry unit and the curve of lack of balance.For example IA > IB, directly shows and reduces certain side rail connection lead impedance.Impedance adjustment unit is adjusted the impedance of rail connection lead according to the suggestion in data display unit, observe lack of balance curve simultaneously, makes lack of balance reach minimum value.
In one embodiment of the invention, impedance adjusting module preferably has the many grades of rail connection leads of adjusting impedance, i.e. balanced type rail connection lead.The impedance of existing rail connection lead is fixed, and the lack of balance of rail traction current can not be adjusted substantially.The impedance of rail connection lead is the flow through impedance of route of traction current, and flow through more greatly its traction current of its impedance is less, and its impedance more rill is larger through its traction current.Because rail section is much larger than rail connection lead cross section, isometric rail impedance is much smaller than the impedance of rail connection lead.For the station track circuit that is generally 200m left and right for length, adjust the impedance of rail connection lead, can effectively adjust by the size of its traction current.The rail connection lead adopting in the present invention, by impedance is adjusted, is realized the adjustment of traction current in rail, thereby reduces the difference of IA, IB, reduces the interference of traction current to signalling set.
Referring to Fig. 2, the rail connection lead in the present invention is connected to the two ends of the impedance transformer traction circle of apparatus for transmitting signal and/or signal receiver, and RL1 and RL2 represent respectively the impedance of rail connection lead.Once the impedance adjustment of rail connection lead, can directly affect the variation of impedance transformer traction circle two ends traction current.In the present invention, preferably the impedance of the rail connection lead to apparatus for transmitting signal and signal receiver two ends is adjusted respectively, realizes relatively accurate traction current adjustment.Be pointed out that, four one steel rail connection leads of a track section all can be adjusted impedance, can certainly only adjust two one steel rails connections of apparatus for transmitting signal or two one steel rail connection leads of signal receiver.Obviously, the setting range of four one steel rail connection lead impedances with respect to the impedance setting range of two one steel rail connection leads more greatly, more accurate.
Impedance adjusting module carries out impedance adjustment according to the suggestion of amperometry unit.For example, as IA > IB, the suggestion of amperometry unit reduces the impedance of IB place rail connection lead.Reducing, in the process of rail connection lead impedance, to need to show in Real Time Observation data display unit the curve of lack of balance, ensure that as much as possible the value of lack of balance reaches minimum.When the value of lack of balance hour, in rail, the interference of traction current is minimum for the interference of apparatus for transmitting signal or signal receiver.
In sum, the present invention passes through the lack of balance of Real-Time Monitoring rail return current traction current, and according to monitoring data, the impedance of rail connection lead is adjusted, and reduces the interference of traction current to signalling set.Utilize the present invention, can realize railway electrification section rail traction current balanced adjustment, reach and do not affecting under the prerequisite that rail traction current is unobstructed, reduce the lack of balance of rail traction current, improved the functional reliability of track circuit and mobile unit.
Above traction current balancing device and the method thereof for railway electrification section provided by the present invention had been described in detail.For one of ordinary skill in the art, any apparent change of under the prerequisite that does not deviate from connotation of the present invention, it being done, all will form infringement of patent right of the present invention, will bear corresponding legal liability.
Claims (8)
1. for a traction current balancing device for railway electrification section, it is characterized in that comprising overbalance test module and impedance adjusting module; Described overbalance test module is connected to the two ends of impedance transformer traction circle, and described impedance adjusting module is connected between rail and impedance transformer traction circle;
Described overbalance test module gathers the traction current in rail, and sampled data is analyzed, and shows lack of balance and the impedance adjustment suggestion of traction current; Described impedance adjusting module is adjusted impedance according to described impedance adjustment suggestion, makes lack of balance reach minimum.
2. traction current balancing device as claimed in claim 1, is characterized in that:
Described overbalance test module comprises current acquisition unit, amperometry unit and data display unit;
Described current acquisition unit connects the two ends of impedance transformer traction circle, and described amperometry unit is connected with described data display unit with the electric unit of described current acquisition respectively;
Described current acquisition unit gathers the traction current in rail and sampling data transmitting is delivered to described amperometry unit, and described amperometry unit is analyzed described sampled data, draws lack of balance curve and impedance adjustment suggestion; Described data display unit shows impedance adjustment suggestion and lack of balance curve.
3. traction current balancing device as claimed in claim 1, is characterized in that:
Described impedance adjusting module is to have the many grades of rail connection leads of adjusting impedance.
4. traction current balancing device as claimed in claim 3, is characterized in that:
Described rail connection lead is four, is connected to the two ends of the impedance transformer traction circle of signal receiver and/or apparatus for transmitting signal.
5. for a traction current balance method for railway electrification section, it is characterized in that comprising the steps:
Gather the traction current in rail;
Sampled data is analyzed, drawn lack of balance and the impedance adjustment suggestion to rail connection lead;
Adjust the impedance of rail connection lead according to described impedance adjustment suggestion, make described lack of balance reach minimum.
6. traction current balance method as claimed in claim 5, is characterized in that:
Described lack of balance is the electric current difference at impedance transformer traction circle two ends.
7. traction current balance method as claimed in claim 5, is characterized in that:
Described sampled data is carried out to spectral analysis, carry out extraction and analysis for the component in mobile unit frequency band range, thereby judge disturbance variable in frequency band.
8. traction current balance method as claimed in claim 5, is characterized in that:
In the time adjusting the impedance of rail connection lead, the impedance of the rail connection lead to apparatus for transmitting signal and/or signal receiver two ends is adjusted respectively.
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| CN201410073654.7A CN103832293B (en) | 2014-02-28 | 2014-02-28 | Traction current bascule and its method for railway electrification section |
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| CN201410073654.7A CN103832293B (en) | 2014-02-28 | 2014-02-28 | Traction current bascule and its method for railway electrification section |
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| CN104166038A (en) * | 2014-07-07 | 2014-11-26 | 李辉 | Self-monitoring device used for railway choke transformer |
| CN104714066A (en) * | 2015-02-06 | 2015-06-17 | 中国铁路总公司 | Track circuit equipment traction current conductivity interference analog device |
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| CN107867308A (en) * | 2016-09-23 | 2018-04-03 | 河南蓝信科技股份有限公司 | A kind of electronics wheel is to device and method thereof |
| CN111038340A (en) * | 2019-12-22 | 2020-04-21 | 中铁二院工程集团有限责任公司 | Traction backflow structure of alternating-current traction power supply system type rack rail railway |
| CN114655274A (en) * | 2022-03-03 | 2022-06-24 | 北京全路通信信号研究设计院集团有限公司 | Double-rail balancing device and method for applying same and avoiding red light band of track circuit |
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| CN111038340A (en) * | 2019-12-22 | 2020-04-21 | 中铁二院工程集团有限责任公司 | Traction backflow structure of alternating-current traction power supply system type rack rail railway |
| CN114655274A (en) * | 2022-03-03 | 2022-06-24 | 北京全路通信信号研究设计院集团有限公司 | Double-rail balancing device and method for applying same and avoiding red light band of track circuit |
| CN114655274B (en) * | 2022-03-03 | 2024-02-09 | 北京全路通信信号研究设计院集团有限公司 | Double-track balancing device and application thereof and method for avoiding red light bands of track circuit |
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