CN104085317A - Absorption device for induced voltage in direct-current electrified railway traction networks - Google Patents
Absorption device for induced voltage in direct-current electrified railway traction networks Download PDFInfo
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- CN104085317A CN104085317A CN201410283233.7A CN201410283233A CN104085317A CN 104085317 A CN104085317 A CN 104085317A CN 201410283233 A CN201410283233 A CN 201410283233A CN 104085317 A CN104085317 A CN 104085317A
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- induced voltage
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- electrified railway
- traction
- branch road
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
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Abstract
An absorption device for induced voltage in direct-current electrified railway traction networks is characterized in that a main circuit is formed by parallelly connecting one or a plurality of LC (inductor-capacitor) resonance filter branches and a CRL (capacitor, resistor and inductor) high-pass filter branch, the main circuit is connected between an overhead contact system and a steel rail when installed in an internal direct-current traction network, and the main circuit is connected between a positive traction busbar and a negative traction busbar. A capacitor C<1> and an inductor L<1> form a series resonance branch with resonant frequency f; a capacitor C<n> and an inductor L<n> form a series resonance branch with resonant frequency nf (n is an odd integer); a capacitor C<2>, a resistor R<2> and an inductor L<2> form a CRL high-pass filter branch. The LC series resonance branches and the CRL high-pass filter branch in the absorption device provide a circulation passage for a power frequency component and a harmonic component in the induced voltage, amplitude of the induced voltage is suppressed accordingly, the influence of the alternating current traction network upon the induced voltage of the direct-current traction network can be effectively reduced, normal operation of a direct-current train can be guaranteed and safety of direct-current electrified railway power supply equipment and personal safety are guaranteed.
Description
Technical field
The invention belongs to track traffic traction power supply technical field, be specifically related to a kind of DC electrified railway traction net induced voltage absorption plant.
Background technology
Along with the development of China's main line electric railway and urban track traffic, inevitably there is the situation of the adjacent parallel running of AC and DC electric railway circuit, for example, at Nanjing Foundations of Dashengguan Changjiang River Bridge, adopt the peace inter-city rail transit and the Beijing-Shanghai High-Speed Railway and the bridge floor parallel running altogether of Shanghai Chinese Rong railway line for passenger traffic that adopt AC25kV ac tracting network of DC1500V DC Traction Network.And line length exceedes 4km, the minimum spacing of AC and DC traction net is less than 10m.China's main line electric railway adopts power frequency (50Hz) single phase A.C. 25kV power supply system, and urban track traffic DC electrified railway adopts DC750V or DC1500V power supply system.Electric current in ac tracting network conductor is set up alternating magnetic field in space around, produces longitudinal induction electro-motive force by electromagnetic induction on adjacent DC traction net conductor.The online ac induction voltage producing of DC traction is superimposed upon on vdc, may cause occurring exceeding the voltage of normal operation permissible value, thereby affect the normal operation of DC traction power-supply system, even causes device damage and withdrawal of train.Meanwhile, do not have a power failure and when DC electrified railway contact system is safeguarded, may threaten to the personal safety of contiguous DC electrified railway operation service personnel at ac electrified railway.
Summary of the invention
The object of this invention is to provide a kind of DC electrified railway traction net induced voltage absorption plant, it can effectively reduce the induced voltage impact that ac electrified railway traction net causes in the DC traction being adjacent on the net, thereby suppress to occur dangerous over voltage, ensure DC electrified railway power equipment supply safety and personal safety.
Technical scheme of the present invention is:
A kind of DC electrified railway draws net induced voltage absorption plant, is netting one of the each installation in two ends with the DC electrified railway traction of ac electrified railway traction net close together.Power circuit is made up of one or more LC resonator, filter branch roads and a CRL high pass branch circuit parallel connection, in the time being arranged on interval DC Traction Network, is connected between contact system and rail; In the time being arranged on traction substation, be connected between positive and negative traction bus.
The invention has the beneficial effects as follows:
With the DC electrified railway traction net two ends of ac electrified railway traction net close together, a DC electrified railway traction net induced voltage absorption plant is respectively being installed, LC series resonance branch road in induced voltage absorption plant and CRL high pass branch road provide circulation flow path for the power frequency component in induced voltage and harmonic component, suppress induced voltage amplitude, can effectively reduce the induced voltage impact of ac tracting network on DC Traction Network, can ensure the normal operation of direct current train, for DC electrified railway power equipment supply safety and personal safety provide safeguard.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Brief description of the drawings
Fig. 1 is DC electrified railway traction net induced voltage absorption plant principle of work schematic diagram.
Fig. 2 is DC electrified railway traction net induced voltage absorption plant schematic circuit diagram.
Fig. 3 is DC electrified railway traction net induced voltage absorption plant embodiment mono-.
Fig. 4 is DC electrified railway traction net induced voltage absorption plant embodiment bis-.
Detailed description of the invention
The invention belongs to a kind of DC electrified railway traction net induced voltage absorption plant, its principle of work can be illustrated by Fig. 1.In Fig. 1, DC Traction Network and ac tracting network are parallel, and close together, and ac tracting network represents by one section of single line AT Supplied Catenary System, SS
1for AC traction substation, T
1represent the contact system of ac tracting network, G
1represent the rail of ac tracting network, F
1the positive feeder that represents ac tracting network, Train-1 represents to exchange train; SS
2and SS
3for DC traction substation, T
2represent the contact system of DC Traction Network, G
2the rail that represents DC Traction Network, Train-2 represents direct current train.In the time that ac tracting network exists the load current that train causes, alternating electromagnetic field is set up in space around, due to electromagnetic coupled effect, can on the contact system of DC Traction Network and rail, produce respectively induced voltage u
tand u
g, because alternating current electric locomotive load current also contains higher harmonic current, induced voltage u conventionally except frequency of operation fundamental current
tand u
gcan contain power frequency composition and harmonic components, and both numerical value are not etc., in the time that induced voltage is larger, will works the mischief or DC Traction Network service personnel is formed and threatened the operation of direct current train yet.Induced voltage absorption plant of the present invention is installed at DC Traction Network two ends, that is, and the IVS in figure
1and IVS
2, the LC series resonance branch road in induced voltage absorption plant and CRL high pass branch road will provide circulation flow path for induced voltage, play the inhibit function to induced voltage power frequency component and harmonic component, avoid occurring dangerous voltage.
A kind of DC electrified railway traction of the present invention net induced voltage absorption plant, its circuit theory as shown in Figure 2.In Fig. 2, with the DC electrified railway traction net two ends of ac electrified railway traction net close together, a DC electrified railway traction net induced voltage absorption plant is respectively being installed, B+ connects ormal traction bus or the contact system of DC electrified railway, B-connects negative traction bus or rail, power circuit is connected in parallel between B+ and B-, is made up of one or more LC series resonance branch roads and a CRL high pass branch circuit parallel connection.Capacitor C
1and inductance L
1formation resonant frequency is the series resonance branch road of f (f is the frequency of operation of the ac electrified railway adjacent with DC electrified railway, and f is 50Hz or 60Hz conventionally).Capacitor C
3and inductance L
3the series resonance branch road that formation resonant frequency is 3f ..., capacitor C
nand inductance L
nformation resonant frequency is the series resonance branch road of nf (n is integer, gets odd number).Capacitor C
2, resistance R
2and inductance L
2form CRL high pass branch road, the cutoff frequency f of high pass branch road
0be greater than nf, wherein f
0=1/ (2 π C
2r
2).
Embodiment mono-as shown in Figure 3, is made up of a LC series resonance branch road and a CRL high pass branch circuit parallel connection.Capacitor C
1and inductance L
1formation resonant frequency is the LC series resonance branch road of f (f is the frequency of operation of the ac electrified railway adjacent with DC electrified railway, and f is 50Hz or 60Hz conventionally), is connected in parallel on capacitor C
1on resistance R
1be used under device powering-off state C
1electric discharge.Capacitor C
2, resistance R
2and inductance L
2form CRL high pass branch road, the cutoff frequency f of high pass branch road
0be greater than f, wherein f
0=1/ (2 π C
2r
2), f
0span can be 150～800Hz.CT
1, CT
2, CT
zrepresent current transformer, CT
1be connected to LC series resonance branch road and measure this branch current, CT
2be connected to CRL high pass branch road and measure this branch current, CT
zfor measuring the total current of induced voltage absorption plant.Cabinet is installed in empty wire frame representation, and the armamentarium of induced voltage absorption plant is arranged in a cabinet.DL represents DC circuit breaker.In cabinet, have two outlet terminal B+ and B-, B+ outgoing cable connects ormal traction bus or the contact system of DC electrified railway through circuit breaker DL, and B-connects negative traction bus or rail by cable.With the DC electrified railway traction net two ends of ac electrified railway traction net close together, a DC electrified railway traction net induced voltage absorption plant is respectively being installed.
As shown in Figure 4, power circuit is made up of 4 LC series resonance branch roads and a CRL high pass branch circuit parallel connection embodiment bis-, capacitor C
1and inductance L
1formation resonant frequency is the series resonance branch road of f (f is the frequency of operation of the ac electrified railway adjacent with DC electrified railway, and f is 50Hz or 60Hz conventionally), is connected in parallel on capacitor C
1on resistance R
1be used under device powering-off state C
1electric discharge.Capacitor C
3and inductance L
3the series resonance branch road that formation resonant frequency is 3f; Capacitor C
5and inductance L
5the series resonance branch road that formation resonant frequency is 5f; Capacitor C
7and inductance L
7the series resonance branch road that formation resonant frequency is 7f.Capacitor C
2, resistance R
2and inductance L
2form CRL high pass branch road, the cutoff frequency f of high pass branch road
0be greater than 7f, wherein f
0=1/ (2 π C
2r
2), f
0span can be 450～800Hz.CT
zrepresent current transformer, for measuring the total current of induced voltage absorption plant.The armamentarium of induced voltage absorption plant is arranged on (empty wire frame representation cabinet in figure) in a cabinet.DL represents DC circuit breaker.In cabinet, have two outlet terminal B+ and B-, B+ outgoing cable connects ormal traction bus or the contact system of DC electrified railway through short circuiting device DL, and B-connects negative traction bus or rail by cable.With the DC electrified railway traction net two ends of ac electrified railway traction net close together, a DC electrified railway traction net induced voltage absorption plant is respectively being installed.
Claims (7)
1. a DC electrified railway traction net induced voltage absorption plant, respectively installing one with the DC electrified railway traction net two ends of ac electrified railway traction net close together, it is characterized in that: power circuit is made up of one or more LC resonator, filter branch roads and a CRL high pass branch circuit parallel connection, in the time being arranged on interval DC Traction Network, be connected between contact system and rail; In the time being arranged on traction substation, be connected between positive and negative traction bus.
2. induced voltage absorption plant according to claim 1, is characterized in that: power circuit is made up of a LC resonator, filter branch road and a CRL high pass branch circuit parallel connection, in described LC resonator, filter branch road, and capacitor C
1and inductance L
1the LC series resonance branch road that formation resonant frequency is f; Capacitor C
2, resistance R
2and inductance L
2form CRL high pass branch road, the cutoff frequency f of high pass branch road
0be greater than f, wherein f
0=1/ (2 π C
2r
2).
3. induced voltage absorption plant according to claim 2, is characterized in that: in capacitor C
1a two ends resistance R in parallel
1be used under device powering-off state C
1electric discharge.
4. according to the induced voltage absorption plant described in claim 2 or 3, it is characterized in that: f is the frequency of operation of the ac electrified railway adjacent with DC electrified railway, and f is 50Hz or 60Hz conventionally; f
0span is 150～800Hz.
5. induced voltage absorption plant according to claim 1, is characterized in that: power circuit is made up of multiple LC resonator, filter branch roads and a CRL high pass branch circuit parallel connection, capacitor C
1and inductance L
1the series resonance branch road that formation resonant frequency is f; Capacitor C
3and inductance L
3the series resonance branch road that formation resonant frequency is 3f; By that analogy, capacitor C
nand inductance L
nthe series resonance branch road that formation resonant frequency is nf, n is integer, gets odd number; Capacitor C
2, resistance R
2and inductance L
2form CRL high pass branch road, the cutoff frequency f of high pass branch road
0be greater than 7f, wherein f
0=1/ (2 π C
2r
2).
6. induced voltage absorption plant according to claim 5, is characterized in that: in capacitor C
1a two ends resistance R in parallel
1be used under device powering-off state C
1electric discharge.
7. induced voltage absorption plant according to claim 5, is characterized in that: f is the frequency of operation of the ac electrified railway adjacent with DC electrified railway, and f is 50Hz or 60Hz conventionally; f
0span is 450～800Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283233.7A CN104085317B (en) | 2014-06-23 | 2014-06-23 | Absorption device for induced voltage in direct-current electrified railway traction networks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283233.7A CN104085317B (en) | 2014-06-23 | 2014-06-23 | Absorption device for induced voltage in direct-current electrified railway traction networks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104085317A true CN104085317A (en) | 2014-10-08 |
| CN104085317B CN104085317B (en) | 2017-01-18 |
Family
ID=51633121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410283233.7A Expired - Fee Related CN104085317B (en) | 2014-06-23 | 2014-06-23 | Absorption device for induced voltage in direct-current electrified railway traction networks |
Country Status (1)
| Country | Link |
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| CN (1) | CN104085317B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868704A (en) * | 2015-05-12 | 2015-08-26 | 南京航空航天大学 | Matrix converter input filter |
| CN104868458A (en) * | 2015-05-27 | 2015-08-26 | 山东电工电气日立高压开关有限公司 | Induced voltage absorption device and method thereof |
| CN105140882A (en) * | 2015-08-27 | 2015-12-09 | 国网上海市电力公司 | Substation direct current system alternating current intrusion protection device |
| CN112130046A (en) * | 2020-09-24 | 2020-12-25 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for restraining high-voltage power frequency induced voltage in high-voltage test |
| CN117895450A (en) * | 2024-03-15 | 2024-04-16 | 中车南京浦镇车辆有限公司 | DC bus power supply circuit and overvoltage and undervoltage protection method |
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| JPH1042466A (en) * | 1996-07-17 | 1998-02-13 | West Japan Railway Co | Dc filter for electric railway |
| WO2001015930A1 (en) * | 1999-09-02 | 2001-03-08 | Balfour Beatty Plc | A plant for feeding electric power to railway vehicles |
| JP2006069406A (en) * | 2004-09-03 | 2006-03-16 | Railway Technical Res Inst | Substation |
| CN101145692A (en) * | 2007-08-22 | 2008-03-19 | 北京交通大学 | Drawing network high and second harmonic wave and resonance and transient voltage restraint device |
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2014
- 2014-06-23 CN CN201410283233.7A patent/CN104085317B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1042466A (en) * | 1996-07-17 | 1998-02-13 | West Japan Railway Co | Dc filter for electric railway |
| WO2001015930A1 (en) * | 1999-09-02 | 2001-03-08 | Balfour Beatty Plc | A plant for feeding electric power to railway vehicles |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868704A (en) * | 2015-05-12 | 2015-08-26 | 南京航空航天大学 | Matrix converter input filter |
| CN104868458A (en) * | 2015-05-27 | 2015-08-26 | 山东电工电气日立高压开关有限公司 | Induced voltage absorption device and method thereof |
| CN104868458B (en) * | 2015-05-27 | 2018-09-28 | 山东电工电气日立高压开关有限公司 | A kind of induced voltage absorption plant and its method |
| CN105140882A (en) * | 2015-08-27 | 2015-12-09 | 国网上海市电力公司 | Substation direct current system alternating current intrusion protection device |
| CN105140882B (en) * | 2015-08-27 | 2018-03-16 | 国网上海市电力公司 | A kind of transformer station direct current system exchanges intrusion protection device |
| CN112130046A (en) * | 2020-09-24 | 2020-12-25 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for restraining high-voltage power frequency induced voltage in high-voltage test |
| CN112130046B (en) * | 2020-09-24 | 2023-11-21 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for inhibiting high-voltage power frequency induced voltage in high-voltage test |
| CN117895450A (en) * | 2024-03-15 | 2024-04-16 | 中车南京浦镇车辆有限公司 | DC bus power supply circuit and overvoltage and undervoltage protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104085317B (en) | 2017-01-18 |
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Granted publication date: 20170118 |