CN115173831A - Track circuit impedance matching device and system - Google Patents
Track circuit impedance matching device and system Download PDFInfo
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- CN115173831A CN115173831A CN202211081104.0A CN202211081104A CN115173831A CN 115173831 A CN115173831 A CN 115173831A CN 202211081104 A CN202211081104 A CN 202211081104A CN 115173831 A CN115173831 A CN 115173831A
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- filter circuit
- impedance matching
- matching device
- terminal
- circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/18—Railway track circuits
- B61L1/181—Details
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
Abstract
The application discloses a track circuit impedance matching device and a system, wherein the device comprises a first filter circuit, a second filter circuit and a third filter circuit; the first filter circuit is arranged to suppress power frequency interference signals; the second filter circuit is set to inhibit power frequency harmonic interference signals; the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device; the first end of the first filter circuit, the first end of the second filter circuit and the first end of the third filter circuit are connected with a first terminal which is used as the track circuit impedance matching device; the second end of the first filter circuit is used as the second connecting end of the track circuit impedance matching device; and the second end of the second filter circuit and the second end of the third filter circuit are connected with a third terminal which is used as the track circuit impedance matching device together.
Description
Technical Field
The present application relates to the field of rail transit technologies, and in particular, to a rail circuit impedance matching apparatus and system.
Background
The track circuit is an important component of a train operation control system, and mainly has the functions of realizing train occupancy check and continuously transmitting locomotive signals to vehicle-mounted equipment, and the track circuit frequency shift signals realize signal transmission through steel rails. The traction power supply system supplies power to the train through a contact network, and traction current backflow is achieved through a steel rail, a ground wire and the like. Therefore, the track circuit and the traction power supply system are coupled and transmitted through the steel rail, and the problems of unbalanced current harmonic interference and track circuit frequency shift signal transmission need to be solved.
At present, the existing solution (fig. 1 shows a schematic diagram of the conductive interference of the prior art electrified railway, fig. 2 shows a schematic diagram of the connection between the prior adapter and the choke transformer) is protected by the solution of arranging the choke transformer and connecting the adapter (QSP) at the mechanical insulation joint,
(1) For a 17/20 model adapter, as shown in fig. 3, when the frequency is 50Hz, the impedance forms a zero point to suppress power frequency interference; when the frequency is 1850Hz, the impedance forms a pole to ensure the normal transmission of the frequency shift signal;
(2) For the 23/26 type adapter, as shown in fig. 4, when the frequency is 50Hz, the impedance forms a zero point to suppress the power frequency interference; when the frequency is 2450Hz, the impedance forms a pole to ensure the normal transmission of the frequency shift signal.
According to the comprehensive analysis of the existing scheme, the existing scheme has the following defects:
(1) Problem of harmonic interference of unbalanced traction current
The unbalanced traction current interference includes power frequency interference and harmonic interference. At present, the existing scheme can only eliminate power frequency interference through a series resonance scheme, and can not filter harmonic interference, especially interference signals near the frequency shift signal frequency.
(2) Track circuit frequency shift signal transmission problem
The track circuit frequency shift signal comprises 4 reference carrier frequencies (1700 Hz, 2000Hz, 2300Hz and 2600 Hz), at present, the existing scheme can only be used by separating two groups of carrier frequencies, and the frequency passing function can not be realized for four carrier frequencies on site.
Disclosure of Invention
The application provides a track circuit impedance matching device, and the device and the system can restrain power frequency interference and power frequency harmonic interference, and can transmit 4 reference carrier frequency (1700 Hz, 2000Hz, 2300Hz and 2600 Hz) frequency shift signals of a track circuit.
The application provides a track circuit impedance matching device, which comprises a first filter circuit, a second filter circuit and a third filter circuit; the first filter circuit, the second filter circuit and the third filter circuit respectively comprise a first end and a second end, and the track circuit impedance matching device is provided with three terminals;
the first filter circuit is set to suppress power frequency interference signals;
the second filter circuit is set to inhibit power frequency harmonic interference signals;
the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device;
the first end of the first filter circuit, the first end of the second filter circuit and the first end of the third filter circuit are connected with a first terminal which is used as the track circuit impedance matching device; the second end of the first filter circuit is used as the second connecting end of the track circuit impedance matching device; the second end of the second filter circuit and the second end of the third filter circuit are connected with a third terminal which is used as the track circuit impedance matching device;
the power frequency interference signal and the power frequency harmonic interference signal are caused by transmission of unbalanced traction current generated in the running process of the train in the steel rail.
In an exemplary embodiment, the first filter circuit includes a first inductor and a first capacitor connected in series.
In an exemplary embodiment, the second filter circuit includes a second inductor and a second capacitor connected in series.
In an exemplary embodiment, the third filter circuit includes a third capacitive element.
In an exemplary embodiment, the first filter circuit is specifically configured to suppress the power frequency interference signal through the first series resonance.
In an exemplary embodiment, the second filter circuit is specifically configured to suppress the power frequency harmonic interference signal through the second series resonance.
In an exemplary embodiment, the resonance frequency of the first series resonance is 50Hz.
In an exemplary embodiment, the resonance frequency of the second series resonance is 2150Hz.
In an exemplary embodiment, the resonant frequencies at which the first filter circuit, the second filter circuit, and the third filter circuit realize parallel resonance together with the inductive reactance of the transformer to be connected outside the track circuit impedance matching device include 1850Hz and 2450Hz.
The application provides a track circuit impedance matching system, which comprises a track circuit impedance matching device and a choke transformer;
the track circuit impedance matching device comprises a first filter circuit, a second filter circuit and a third filter circuit; the first filter circuit, the second filter circuit and the third filter circuit respectively comprise a first end and a second end, and the track circuit impedance matching device is provided with three wiring ends;
the first filter circuit is arranged to suppress power frequency interference signals;
the second filter circuit is set to inhibit power frequency harmonic interference signals;
the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device;
the first end of the first filter circuit, the first end of the second filter circuit and the first end of the third filter circuit are connected with a first terminal which is used as the track circuit impedance matching device; the second end of the first filter circuit is used as a second connecting end of the track circuit impedance matching device; the second end of the second filter circuit and the second end of the third filter circuit are connected with a third terminal which is used as the track circuit impedance matching device;
the power frequency interference signal and the power frequency harmonic interference signal are caused by transmission of unbalanced traction current generated in the running process of the train in the steel rail;
a first terminal of the track circuit impedance matching device is connected with a 4 th terminal of the secondary side of the choke transformer, and a third terminal of the track circuit impedance matching device is connected with a 12 th terminal of the secondary side of the choke transformer; a second terminal of the track circuit impedance matching device is connected with a 6 th terminal of the secondary side of the choke transformer or connected with a 12 th terminal of the secondary side of the choke transformer;
the 5 th terminal of the choke transformer is connected with the 7 th terminal, and the 9 th terminal of the choke transformer is connected with the 10 th terminal.
In an exemplary embodiment, the first filter circuit includes a first inductor and a first capacitor connected in series.
In an exemplary embodiment, the second filter circuit includes a second inductor and a second capacitor connected in series.
In an exemplary embodiment, the third filter circuit includes a third capacitive element.
In an exemplary embodiment, the first filter circuit is specifically configured to suppress the power frequency interference signal through the first series resonance.
In an exemplary embodiment, the second filter circuit is specifically configured to suppress the power frequency harmonic interference signal through the second series resonance.
In an exemplary embodiment, the resonance frequency of the first series resonance is 50Hz.
In an exemplary embodiment, the resonance frequency of the second series resonance is 2150Hz.
In an exemplary embodiment, the resonant frequencies at which the first filter circuit, the second filter circuit, and the third filter circuit realize parallel resonance together with the inductive reactance of the transformer to be connected outside the track circuit impedance matching device include 1850Hz and 2450Hz.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The drawings are intended to provide an understanding of the present disclosure, and are to be considered as forming a part of the specification, and are to be used together with the embodiments of the present disclosure to explain the present disclosure without limiting the present disclosure.
FIG. 1 is a schematic illustration of a prior art electrified railroad conductive disturbance;
FIG. 2 is a schematic diagram of a prior art adapter and a choke transformer;
FIG. 3 is a simulation diagram of the frequency response of a system after a prior QSP-1700/2000 adapter is connected with a choke transformer;
FIG. 4 is a simulation diagram of the frequency response of a system after a prior QSP-2300/2600 adapter is connected with a choke transformer;
fig. 5 is a schematic diagram of a track circuit impedance matching device according to an embodiment of the present application;
fig. 6 is a schematic diagram of a connection between the track circuit impedance matching device and the choke transformer according to the embodiment of the present application;
fig. 7 is a schematic diagram of another connection between the track circuit impedance matching device and the choke transformer according to the embodiment of the present application;
fig. 8 is a simulation diagram of a system frequency response after the track circuit impedance matching device provided in the embodiment of the present application is connected to the choke transformer.
Detailed Description
Fig. 5 is a schematic diagram of a track circuit impedance matching device according to an embodiment of the present disclosure, and as shown in fig. 5, the track circuit impedance matching device according to the present embodiment includes a first filter circuit, a second filter circuit, and a third filter circuit; the first filter circuit, the second filter circuit and the third filter circuit respectively comprise a first end and a second end, and the track circuit impedance matching device is provided with three terminals;
the first filter circuit is set to suppress power frequency interference signals;
the second filter circuit is set to inhibit power frequency harmonic interference signals;
the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device;
the first end of the first filter circuit, the first end of the second filter circuit and the first end of the third filter circuit are connected with a first terminal which is used as the track circuit impedance matching device; the second end of the first filter circuit is used as the second connecting end of the track circuit impedance matching device; the second end of the second filter circuit and the second end of the third filter circuit are connected with a third terminal which is used as the track circuit impedance matching device;
the power frequency interference signal and the power frequency harmonic interference signal are caused by transmission of unbalanced traction current generated in the running process of the train in the steel rail.
The impedance matching means that the impedance of the steel rail and the cable is matched.
In an exemplary embodiment, the first filter circuit includes a first inductor and a first capacitor connected in series.
In an exemplary embodiment, the second filter circuit includes a second inductor and a second capacitor connected in series.
In one exemplary embodiment, the third filter circuit includes a third capacitive element.
In an exemplary embodiment, the first filter circuit is specifically configured to suppress the power frequency interference signal through the first series resonance.
In an exemplary embodiment, the second filter circuit is specifically configured to suppress the power frequency harmonic interference signal through the second series resonance.
In an exemplary embodiment, the resonance frequency of the first series resonance is 50Hz.
In an exemplary embodiment, the resonance frequency of the second series resonance is 2150Hz.
Assuming 2150Hz is the series resonance frequency, interference signals near the resonance frequency can be suppressed.
In an exemplary embodiment, the resonant frequencies at which the first filter circuit, the second filter circuit, and the third filter circuit achieve parallel resonance together with the inductive reactance of the transformer to be connected outside the track circuit impedance matching device include 1850Hz and 2450Hz.
In other exemplary embodiments, the resonance frequency of the parallel resonance may be a value between 1700Hz and 2000 Hz.
In other exemplary embodiments, the resonance frequency of the parallel resonance may also be a value between 2300Hz and 2600 Hz.
In one other exemplary embodiment, the series resonant frequency may be other values between 2000Hz and 2300 Hz.
According to the embodiment of the application, the first filter circuit is used for inhibiting the power frequency interference signal; the second filter circuit suppresses power frequency harmonic interference signals; the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device; . The embodiment of the application not only can inhibit unbalanced traction current power frequency interference and power frequency interference harmonic interference, but also can enable the impedance of the frequency shift signals of the 4 reference carrier frequencies (1700 Hz, 2000Hz, 2300Hz and 2600 Hz) of the track circuit to be high impedance, so that the frequency shift signals of the 4 reference carrier frequencies (1700 Hz, 2000Hz, 2300Hz and 2600 Hz) of the track circuit can be transmitted.
Fig. 6 is a schematic flow chart diagram of connection between a track circuit impedance matching device and a choke transformer according to an embodiment of the present application, where as shown in fig. 6, the track circuit impedance matching device is connected to the choke transformer, and the track circuit impedance matching device includes a first filter circuit, a second filter circuit, and a third filter circuit; the first filter circuit is connected with the secondary side of the choke transformer, and the suppression of power frequency interference signals is realized through series resonance; the second filter circuit is connected with the secondary side of the choke transformer and is used for inhibiting power frequency harmonic interference signals through series resonance; the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device; the high-impedance design of the frequency shift signals of 4 carrier frequencies of the track circuit can be realized, and the universal track circuit impedance matching device of the choke transformer is designed.
The first filter circuit comprises a first inductance element and a first capacitance element which are connected in series;
a first end of the first inductance element is connected to the secondary side 4 th terminal of the choke transformer, a second end of the first inductance element is connected to a first end of the first capacitance element, and a second end of the first capacitance element is connected to the secondary side 12 th terminal of the choke transformer.
The second filter circuit includes a second inductive element and a second capacitive element connected in series.
A first end of the second inductance element is connected with a secondary side 4 th terminal of the choke transformer, a second end of the second inductance element is connected with a first end of the second capacitance element, and a second end of the second capacitance element is connected with a secondary side 12 th terminal of the choke transformer;
in other embodiments, as shown in fig. 7, the second terminal of the second capacitive element may be connected to the secondary-side 6 th terminal of the choke transformer instead of the secondary-side 12 th terminal of the choke transformer.
The third filter circuit includes a third capacitive element.
A first end of the third capacitive element is connected to the secondary side 4 th terminal of the choke transformer, and a second end of the third capacitive element is connected to the secondary side 12 th terminal of the choke transformer.
The impedance of 4 reference carrier frequencies of 1700Hz, 2000Hz, 2300Hz and 2600Hz of the track circuit frequency shift signal can be larger than 17 omega according to the connection mode of the first filter circuit, the second filter circuit and the third filter circuit with the choke transformer.
The application also provides a track circuit impedance matching system, which comprises a track circuit impedance matching device and a choke transformer;
the track circuit impedance matching device is the track circuit impedance matching device;
a first terminal of the track circuit impedance matching device is connected with a 4 th terminal of the secondary side of the choke transformer, and a third terminal of the track circuit impedance matching device is connected with a 12 th terminal of the secondary side of the choke transformer; a second terminal of the track circuit impedance matching device is connected with a 6 th terminal of the secondary side of the choke transformer or connected with a 12 th terminal of the secondary side of the choke transformer;
the 5 th terminal of the choke transformer is connected with the 7 th terminal, and the 9 th terminal of the choke transformer is connected with the 10 th terminal.
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
Any features shown and/or discussed in this application may be implemented separately or in any suitable combination.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
Claims (10)
1. An impedance matching device for track circuit is characterized in that,
the filter comprises a first filter circuit, a second filter circuit and a third filter circuit; the first filter circuit, the second filter circuit and the third filter circuit respectively comprise a first end and a second end, and the track circuit impedance matching device is provided with three terminals;
the first filter circuit is arranged to suppress power frequency interference signals;
the second filter circuit is set to inhibit power frequency harmonic interference signals;
the first filter circuit, the second filter circuit and the third filter circuit realize parallel resonance together with the inductive reactance of a transformer to be connected outside the track circuit impedance matching device;
the first end of the first filter circuit, the first end of the second filter circuit and the first end of the third filter circuit are connected with a first terminal which is used as the track circuit impedance matching device; the second end of the first filter circuit is used as a second connecting end of the track circuit impedance matching device; the second end of the second filter circuit and the second end of the third filter circuit are connected with a third terminal which is used as the track circuit impedance matching device;
the power frequency interference signal and the power frequency harmonic interference signal are caused by transmission of unbalanced traction current generated in the running process of the train in the steel rail.
2. The apparatus of claim 1,
the first filter circuit comprises a first inductor and a first capacitor which are connected in series.
3. The apparatus of claim 2, comprising:
the second filter circuit comprises a second inductor and a second capacitor which are connected in series.
4. The apparatus of claim 3, comprising:
the third filter circuit includes a third capacitive element.
5. The apparatus of claim 1, comprising:
the first filter circuit is specifically configured to suppress power frequency interference signals through a first series resonance.
6. The apparatus of claim 1, comprising:
and the second filter circuit is specifically configured to suppress power frequency harmonic interference signals through second series resonance.
7. The apparatus of claim 5, comprising:
the resonance frequency of the first series resonance is 50Hz.
8. The apparatus of claim 6, comprising:
the resonance frequency of the second series resonance is 2150Hz.
9. The apparatus of claim 1, comprising:
the resonant frequencies of the first filter circuit, the second filter circuit, the third filter circuit and the inductive reactance of the transformer to be connected outside the track circuit impedance matching device to realize parallel resonance together comprise 1850Hz and 2450Hz.
10. A track circuit impedance matching system is characterized in that,
the device comprises a track circuit impedance matching device and a choke transformer;
the track circuit impedance matching device is the track circuit impedance matching device of any one of claims 1-9;
a first terminal of the track circuit impedance matching device is connected with a fourth terminal of the secondary side of the choke transformer, and a third terminal of the track circuit impedance matching device is connected with a twelfth terminal of the secondary side of the choke transformer; a second terminal of the track circuit impedance matching device is connected with a sixth terminal of the secondary side of the choke transformer or connected with a twelfth terminal of the secondary side of the choke transformer;
the fifth terminal of the choke transformer is connected to the seventh terminal, and the ninth terminal of the choke transformer is connected to the tenth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081104.0A CN115173831B (en) | 2022-09-06 | 2022-09-06 | Track circuit impedance matching device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081104.0A CN115173831B (en) | 2022-09-06 | 2022-09-06 | Track circuit impedance matching device and system |
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| Publication Number | Publication Date |
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| CN115173831A true CN115173831A (en) | 2022-10-11 |
| CN115173831B CN115173831B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211081104.0A Active CN115173831B (en) | 2022-09-06 | 2022-09-06 | Track circuit impedance matching device and system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985338A (en) * | 2017-11-14 | 2018-05-04 | 北京全路通信信号研究设计院集团有限公司 | A kind of device of adapter, suppression track circuit harmonic wave |
| CN108075618A (en) * | 2017-11-14 | 2018-05-25 | 北京全路通信信号研究设计院集团有限公司 | A kind of device of adapter, inhibition track circuit harmonic wave |
| CN108092487A (en) * | 2017-11-14 | 2018-05-29 | 北京全路通信信号研究设计院集团有限公司 | Inhibit the device of track circuit harmonic wave |
| WO2021206176A1 (en) * | 2020-04-10 | 2021-10-14 | 株式会社村田製作所 | Power amplifying device |
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- 2022-09-06 CN CN202211081104.0A patent/CN115173831B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985338A (en) * | 2017-11-14 | 2018-05-04 | 北京全路通信信号研究设计院集团有限公司 | A kind of device of adapter, suppression track circuit harmonic wave |
| CN108075618A (en) * | 2017-11-14 | 2018-05-25 | 北京全路通信信号研究设计院集团有限公司 | A kind of device of adapter, inhibition track circuit harmonic wave |
| CN108092487A (en) * | 2017-11-14 | 2018-05-29 | 北京全路通信信号研究设计院集团有限公司 | Inhibit the device of track circuit harmonic wave |
| WO2021206176A1 (en) * | 2020-04-10 | 2021-10-14 | 株式会社村田製作所 | Power amplifying device |
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| CN115173831B (en) | 2022-12-13 |
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