CN101301896B - Electric impedance-adjustable industrial frequency protective type track circuit mechanical insulated joint - Google Patents
Electric impedance-adjustable industrial frequency protective type track circuit mechanical insulated joint Download PDFInfo
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Abstract
The invention relates to a power frequency protective track circuit mechanical insulation joint with adjustable impedance, which is applied to an electric 25Hz phase-sensitive track circuit. The mechanical insulation joint comprises a choke transformer, and a sensing unit and an inclusive unit which are connected in series, wherein, a series loop is connected in parallel at the secondary side of the choke transformer, the sensing unit and the inclusive unit are connected in series and resonated with the power frequency of 50 Hz. Stable high impedance to the power frequency of 25 Hz is formed by connecting the sensing unit and the inclusive unit which are connected in series and the choke transformer in parallel under the disadjustment condition; the whole impedance is influenced very little after the parameters of each component deviate; moreover, when the sensing unit and the inclusive unit go out of order according to the specific fault modes, the power frequency impedance is reduced to guarantee the safe work of the system. In addition, an adjustable resistor is connected in series in the series loop of the sensing unit and the inclusive unit to realize the fine regulation to the power frequency impedance.
Description
Technical field
The present invention relates to a kind of industrial frequency protective type track circuit mechanical insulated joint of impedance adjustable, be applied to electrified 25Hz phase detecting track circuit.
Background technology
In electrified railway, it mainly is the mutual exchange that realizes signal on ground and the train by rail, because some circuit does not often have train to pass through, the rail rail level has reasons such as dust accumulation, greasy dirt and surface corrosion, worsened wheel to short circuit effect to rail, under the serious situation, Train Wheel causes losing the train occupation inspection to not realizing to the shunt of track circuit, causes safety misadventure.In order to guarantee that Train Wheel needs to adopt the high-voltage large current mode to puncture corrosion, dust and the greasy dirt etc. on rail surface to the short circuit effect to track circuit under these conditions.
What the current large tracts of land of China adopted is 97 type 25Hz phase detecting track circuit, and it is lower to receive impedance, the choke coil inductance of impedance transformer on the 25Hz frequency, the induction reactance that very difficult formation is very high, current impedance transformer induction reactance is between the 0.8-1.3 Ω.This mode is difficult in and forms high voltage on the rail, also needs very large power even if form, and causes and can't implement.
Existing circuit adopts chokes center-point and adjacent sections chokes center-point ways of connecting to guarantee that traction current passes through more.But the impedance of impedance transformer primary winding is greater than 1 Ω, and anti-unbalance traction current index is 10%.And be to realize solving track circuit shunting badness, need to optimize the power and the raising track circuit that are consumed and be subjected to terminal impedance that existing impedance transformer can not satisfy these requirements.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, and a kind of industrial frequency protective type track circuit mechanical insulated joint of simple in structure, safe and reliable impedance adjustable is provided.
The present invention solves the technical scheme that its technical matters takes: a kind of industrial frequency protective type track circuit mechanical insulated joint of impedance adjustable, comprise impedance transformer, also comprise the inductive unit and the capacitive unit that are connected in series, and be connected in parallel on the secondary side of described impedance transformer, described inductive unit and capacitive unit series resonance are in power frequency 50Hz.
Can be in series with a variable resistance that is used to regulate the impedance of described shunt circuit in the series loop of described inductive unit and capacitive unit.
In the track circuit receiving end, series connected inductive unit and capacitive unit and back level after described impedance transformer is in parallel also can be connected and be inserted the variable resistance that is used to adjust receptor voltage.
Described inductive unit can be adjustable inductive unit, comprises multitap inductance.
Described capacitive unit can be adjustable capacitive unit, comprises the electric capacity of a plurality of parallel connections.
Described inductive unit and capacitive unit adjustment realize and the impedance transformer inductance coupling that there are differences.
The present invention by series connected inductive unit and capacitive unit resonance in power frequency 50Hz, formation is for the low resistance of power frequency, be connected in parallel on the stable high resistance that forms under the condition of off resonance frequency of operation 25Hz with impedance transformer again, at choke induction, the inductive unit inductance value, capacitive unit capacitance skew back is little for the overall impedance influence, and in inductive unit, capacitive unit is during according to its peculiar failure mode et out of order, the frequency of operation impedance descends, track circuit receiving end voltage reduces, guarantee system works safety, reduce the consumption of power of sending end impedance transformer, and by adjusting inductive unit and capacitive unit, coupling between the impedance transformer that realization and inductance value there are differences, in addition, in the series loop of described inductive unit and capacitive unit, seal in an adjustable resistance, realize meticulous adjustment the frequency of operation impedance.The utility model is during as receiving end, level seals in adjustable resistance after described inductive unit and the capacitive unit, adjust and play the impedance buffer action to being subjected to terminal voltage, and optimized the protective capacities of power frequency 50Hz, the obstacle overcome ability of raising equipment has reduced power frequency disturbing current taking outdoor track transformer capacity.Satisfy to solve the requirement of track circuit shunting badness simultaneously, reduced the work capacity of engineering when implementing, meet the fault-safety principle principle, be convenient to safeguard, and design simplification, reduced equipment complexity, reduced cost.
Description of drawings
Fig. 1 is schematic circuit diagram of the present invention;
Fig. 2 is applied to the scheme drawing of system for the present invention;
Fig. 3 is the frequency response curve of shunt-resonant circuit among the present invention.
The specific embodiment
As shown in Figure 1, the present invention includes impedance transformer BE, adjustable inductive unit L, adjustable capacitive unit C, adjustable resistance R, R1 formation, after described adjustable inductive unit L, adjustable resistance R and the adjustable capacitive unit C series connection, be connected in parallel on the secondary side of described impedance transformer BE, an end of shunt circuit also is in series with another adjustable resistance R1.By adjusting to parameter, make described adjustable inductive unit and adjustable capacitive unit to power frequency 50Hz series resonance, formation is for the low resistance of power frequency, optimized the protective capacities of power frequency 50Hz, be connected in parallel under the condition of off resonance simultaneously 25Hz is formed stable high resistance with impedance transformer, at choke induction, the inductive unit inductance value, capacitive unit capacitance skew back is little for the overall impedance influence, and reduce in described adjustable inductive unit and adjustable capacitive unit generation induction reactance, capacitive reactance reduces, capacity fall off, under the situation of peculiar failure modes such as contact resistance rising, the frequency of operation impedance descends, track circuit receiving end voltage reduces, guarantee system works safety, reduce the consumption of power of sending end impedance transformer, by adjusting inductive unit and capacitive unit, coupling between the impedance transformer that realization and inductance value there are differences can be carried out meticulous adjusting to the frequency of operation impedance by the adjustable resistance R that regulates in the series loop simultaneously.
As shown in Figure 2, the present invention is applied to 97 type 25Hz phase detecting track circuit sections, can be applied to the sending end and the receiving end of track circuit respectively, in this circuit with after described adjustable inductive unit L, variable resistance R, the variable capacitive unit C series connection, be parallel to the secondary side of impedance transformer BE, more described variable resistance R1 and this circuit be connected in series.Determine the inductance of impedance transformer earlier, difference according to the impedance transformer inductance, corresponding electric capacity presents capacitive to 25Hz in many taps inductance and the variable capacitive unit by adjusting in the described variable inductive unit again, cooperation adjustment by the two makes it present high resistance under condition in off resonance on frequency of operation 25Hz, makes the impedance on the frequency of operation 25Hz reach expectation value by adjusting adjustable resistance R again.Because circuit of the present invention goes for sending end and receiving end both sides, in order to realize being subjected to the adjustment of terminal voltage, adopt described variable resistance R1 to be connected on an end of above-mentioned shunt circuit, utilize the adjustability of self-resistance, not only realize being subjected to the meticulous adjustment of terminal voltage, also played the high resistant buffer action simultaneously to received signal; Reduced the consumption of power of sending end impedance transformer at sending end circuit of the present invention.
In order to reduce power frequency disturbing current taking to outdoor track transformer capacity, need to reduce the disturbing current of injection voltage transformer, described adjustable inductive unit is made of multitap inductance, and described adjustable capacitive unit is made of the electric capacity of a plurality of parallel connections, by fit adjustment to electric capacity and inductance, make in the circuit cooresponding inductance capacitance that power frequency 50Hz is formed series resonance, thereby power frequency 50Hz is formed than low resistance, optimized protective capacities to power frequency 50Hz, reduce the electric current of injection voltage transformer, the problem that the capacity requirement of the track transformer that the solution disturbing current causes rises.
Based on said structure, working process of the present invention is as follows: shown in Figure 3 with reference to the antiresonant circuit frequency response curve, in order to obtain the stable impedance of frequency of operation, the design off resonance influences very little in choke induction, adjustable inductive unit inductance value, adjustable capacitive cell capacitance value skew back for overall impedance in frequency of operation.For improving the impedance of impedance transformer rail side, promote the rail rail surface voltage, by making described adjustable inductive unit and adjustable capacitive unit present capacitive at the 25Hz frequency, the impedance transformer inductance coupling of adjusting inductive unit and capacitive unit and there are differences realizes the compensation to choke induction.System's failure to the safe side side when making adjustable inductive unit, adjustable capacitive unit by peculiar failure mode fault, the working frequency points design is in the resonance point left side, when described fault takes place, resonance point is offset to the right, and the impedance of working frequency points place descends, and causes track circuit receiving end voltage to reduce, realize fault-safety principle, in order to obtain the low resistance of power frequency, minimizing power frequency disturbing current takies outdoor track transformer capacity, designs described inductive unit and capacitive unit series resonance in power frequency 50Hz.
By regulating cooresponding adjustable inductive unit and adjustable capacitive unit, the impedance of frequency of operation is chosen in the parallel resonant point left side, promptly make circuit when frequency of operation, present perception.Because of utilize be the 25Hz off resonance time high resistance, contrast Fig. 3 as can be known, even working frequency points each component parameter when non-parallel resonant point is offset, the impedance variations value is also very little, so influence little in impedance transformer inductance, adjustable inductive unit inductance value, adjustable capacitive cell capacitance value skew back for overall impedance.When considering peculiar failure mode such as the reduction of inductance and electric capacity generation induction reactance, capacitive reactance reduction, capacity fall off, contact resistance rising in addition, can realize fault-safety principle, the off resonance high resistance of 25Hz forms by series connected adjustable inductive unit, adjustable resistance, adjustable capacitive units in series are in parallel with choke induction more later in the circuit of the present invention, and inductance capacitance three element parallel resonance computing formula is in this circuit:
Wherein, L1 is the inductance value of adjustable inductive unit L, L2 is the inductance value that described impedance transformer is once surveyed, C is the capacitance of described adjustable capacitive unit, according to following formula as can be known, when the arbitrary inductance in the circuit of the present invention or electric capacity during by peculiar failure mode et out of order, resonant frequency all will increase, and promptly resonance point moves to right.So when inductance capacitance was pressed specific fault pattern et out of order, the impedance of frequency of operation descended, track circuit receiving end voltage reduces, and realizes track circuit failure to the safe side side.Simultaneously can carry out having sealed in adjustable resistance R in the meticulous series loop that is adjusted in described adjustable inductive unit and adjustable capacitive unit for the impedance of frequency of operation, the impedance of described series loop is
Z＝R+j(ωL-1/ωC)
Wherein, ω=2 π f are angular frequencies of frequency of operation, and f is current frequency of operation 25Hz.Can reduce the quality factor q value of antiresonant circuit by sealing in this resistance R, it is milder to make frequency of operation appear at the locational figure of parallel resonance frequency response curve, and has realized the meticulous adjusting of frequency of operation impedance, is easier to adapt to device requirement.
More than the industrial frequency protective type track circuit mechanical insulated joint of impedance adjustable provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. the industrial frequency protective type track circuit mechanical insulated joint of an impedance adjustable, comprise impedance transformer, it is characterized in that: after an inductive unit and a capacitive unit are connected in series, be connected in parallel on the secondary side of described impedance transformer, described inductive unit and capacitive unit series resonance are in power frequency 50Hz, wherein: described inductive unit is adjustable inductive unit, comprises multitap inductance; Described capacitive unit is adjustable capacitive unit, comprises the electric capacity of a plurality of parallel connections.
2. the industrial frequency protective type track circuit mechanical insulated joint of impedance adjustable according to claim 1 is characterized in that: be in series with an adjustable resistance that is used to regulate the impedance of described shunt circuit in the series loop of described inductive unit and capacitive unit.
3. the industrial frequency protective type track circuit mechanical insulated joint of impedance adjustable according to claim 1, it is characterized in that: in the track circuit receiving end, series connected inductive unit and capacitive unit and back level after described impedance transformer is in parallel, also series connection inserts the adjustable resistance that is used to adjust receptor voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810099740XA CN101301896B (en) | 2008-06-02 | 2008-06-02 | Electric impedance-adjustable industrial frequency protective type track circuit mechanical insulated joint |
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| CN200810099740XA CN101301896B (en) | 2008-06-02 | 2008-06-02 | Electric impedance-adjustable industrial frequency protective type track circuit mechanical insulated joint |
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| CN101301896B true CN101301896B (en) | 2011-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014143722A3 (en) * | 2013-03-15 | 2014-12-31 | Siemens Industry, Inc. | Wireless and/or wired frequency programmable termination shunts |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832293B (en) * | 2014-02-28 | 2017-07-14 | 邹梓晗 | Traction current bascule and its method for railway electrification section |
| CN105281687B (en) * | 2014-06-10 | 2018-06-29 | 杨栋荣 | Impedence tuning apparatus |
| CN114104035A (en) * | 2021-12-27 | 2022-03-01 | 卡斯柯信号有限公司 | Receiver for 50HZ phase-sensitive track circuit |
| CN115892118A (en) * | 2023-01-06 | 2023-04-04 | 中铁通信信号勘测设计院有限公司 | 25Hz phase-sensitive track circuit system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086485A (en) * | 1993-10-14 | 1994-05-11 | 中国铁路通信信号总公司研究设计院 | Monorail locomotive signal |
| CN2313777Y (en) * | 1997-12-26 | 1999-04-14 | 费锡康 | Anti-electric-pulse interfere device for 25H2 rail circuits |
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2008
- 2008-06-02 CN CN200810099740XA patent/CN101301896B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086485A (en) * | 1993-10-14 | 1994-05-11 | 中国铁路通信信号总公司研究设计院 | Monorail locomotive signal |
| CN2313777Y (en) * | 1997-12-26 | 1999-04-14 | 费锡康 | Anti-electric-pulse interfere device for 25H2 rail circuits |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014143722A3 (en) * | 2013-03-15 | 2014-12-31 | Siemens Industry, Inc. | Wireless and/or wired frequency programmable termination shunts |
| US9248848B2 (en) | 2013-03-15 | 2016-02-02 | Siemens Industry, Inc. | Wireless and/or wired frequency programmable termination shunts |
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| CN101301896A (en) | 2008-11-12 |
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