CN113471946A - Lightning protection transmission network - Google Patents
Lightning protection transmission network Download PDFInfo
- Publication number
- CN113471946A CN113471946A CN202010242249.9A CN202010242249A CN113471946A CN 113471946 A CN113471946 A CN 113471946A CN 202010242249 A CN202010242249 A CN 202010242249A CN 113471946 A CN113471946 A CN 113471946A
- Authority
- CN
- China
- Prior art keywords
- transmission network
- lightning protection
- coil
- outgoing line
- lightning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/044—Physical layout, materials not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a lightning protection transmission network, comprising: the transmission network compensation units are arranged in a plurality, are sequentially connected and are arranged between the outdoor equipment and the indoor equipment; further comprising: the lightning protection assembly is arranged between the outdoor equipment and the first transmission network compensation unit and comprises a discharge tube for transverse lightning protection and an isolation transformer for longitudinal lightning protection, one end of the isolation transformer is connected to the outdoor equipment, the other end of the isolation transformer is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the first transmission network compensation unit. Compared with the prior art, the method has the advantages of improving the safety and reliability of the operation of the whole high-speed rail signal system and the like.
Description
Technical Field
The invention relates to a frequency shift track circuit, in particular to a lightning protection transmission network.
Background
In the railway signal system of the existing line and the passenger dedicated line, the ZPW-2000A non-insulation frequency shift track circuit is widely applied, a kilo-mile railway line consists of a plurality of railway sections and stations, each railway section consists of a signal system, namely the ZPW-2000A non-insulation frequency shift track circuit, the signals of each section are electrically isolated, the signals of adjacent sections are ensured not to be interfered with each other, an automatic block system of the track circuit is formed, the running density of the train is improved to the maximum extent on the premise of ensuring the safety of the running train, and the transportation efficiency is improved.
The ZPW-2000A equipment without insulation frequency shift track circuit is divided into indoor equipment and outdoor equipment, the indoor equipment is installed in a mechanical control room of a station, the outdoor equipment is installed beside a track, the indoor equipment is connected with the outdoor equipment through an SPT signal cable, the distance between the outdoor equipment and a mechanical room is unequal due to the fact that the outdoor equipment is installed along the track, transmission impedance inconsistency is caused, in order to guarantee the consistency of the transmission impedance, an analog cable is additionally arranged in the middle of the equipment, the impedance of a short cable is compensated, and the consistency of the transmission impedance between the indoor equipment and each piece of outdoor equipment is guaranteed.
Because outdoor equipment and steel rail lug connection, long distance steel rail, in the easy emergence area of thunderstorm damage, suffer the infringement of thunder and lightning very easily, lead to indoor equipment with the lightning current through the cable, make indoor equipment receive the thunderstorm and damage.
In order to prevent the invasion of lightning current and improve the safety and reliability of the operation of indoor equipment, a lightning protection component is additionally arranged between transmission cables of the indoor equipment and outdoor equipment, so that the lightning current is restrained within a safe allowable range.
Disclosure of Invention
The present invention aims to overcome the defects of the prior art and provide a frequency shift track circuit, wherein a lightning protection component is connected in series in a transmission network of the frequency shift track circuit. The gas discharge tube is added between the transverse direction to play the transverse protection of thunder and surge voltage, the high-isolation transformer is connected between the longitudinal direction in series to play the longitudinal protection of thunder and surge voltage, and the transverse and longitudinal combined thunder and surge voltage protection can effectively protect the indoor electronic equipment of the high-speed rail signal system, and improve the safety and reliability of the high-speed rail operation.
The purpose of the invention can be realized by the following technical scheme:
a lightning protection transport network comprising:
the transmission network compensation units are arranged in a plurality, are sequentially connected and are arranged between the outdoor equipment and the indoor equipment;
further comprising:
the lightning protection assembly is arranged between the outdoor equipment and the first transmission network compensation unit and comprises a discharge tube for transverse lightning protection and an isolation transformer for longitudinal lightning protection, one end of the isolation transformer is connected to the outdoor equipment, the other end of the isolation transformer is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the first transmission network compensation unit.
The transmission network compensation unit comprises a first parallel capacitor, a second parallel capacitor, a series inductor, a first resistor and a second resistor, wherein the first parallel capacitor, the second parallel capacitor and the second parallel capacitor are sequentially arranged, the first resistor and the second resistor are connected between the parallel inductor and the second parallel capacitor, and the first parallel capacitor and the second parallel capacitor are four-terminal capacitors.
The discharge tube is a gas discharge tube.
The isolation transformer is a high isolation transformer, including:
the iron core is an ED type silicon steel iron core, and a fastening steel belt is arranged on the outer side of the iron core;
the framework is wound on the iron core;
and the coil is arranged on the framework and is provided with a lightning invasion side outgoing line, an electronic equipment protection side outgoing line and a grounding side outgoing line, the lightning invasion side outgoing line is positioned at one end of the framework, and the electronic equipment protection side outgoing line, the grounding side outgoing line and the grounding side outgoing line are positioned at the other end of the framework.
The coil comprises a second coil and a first coil, wherein the second coil is used for being connected with an outgoing line of a lightning invasion side, the first coil is used for being connected with a protection side of the electronic equipment, and the turn ratio of the first coil to the second coil is 1: 1.
First insulating layers are arranged between the first coil and the framework, and between the second coil and the framework.
The outside of first coil is equipped with and is used for the electromagnetic shield layer, the electromagnetic shield layer includes the copper foil and locates the second insulating layer on copper foil surface, the electromagnetic shield layer is connected ground side lead-out wire.
The winding width of the coil is smaller than the width of the electromagnetic shielding layer.
The winding width of the coil is larger than two tenths of the width of the electromagnetic shielding layer.
Compared with the prior art, the invention has the following beneficial effects: in original equivalent signal transmission network component, add the lightning protection sub-assembly, under the prerequisite that does not influence transmission characteristics, carry out horizontal and vertical lightning protection to indoor electronic equipment, the lightning protection sub-assembly of addding, it is simple reliable, have horizontal and vertical lightning protection, carry out electrical isolation with outdoor, indoor transmission signal simultaneously, improved the interference killing feature, protected indoor electronic equipment effectively, improved the security and the reliability of whole high-speed railway signal system operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a lightning protection assembly;
fig. 3 is a schematic structural diagram of a compensation unit of a transmission network;
FIG. 4 is a schematic diagram of an isolation transformer;
FIG. 5 is a schematic view of a coil;
wherein: 1. the transformer comprises a framework, 2, an iron core, 3, a fastening steel belt, 4, a coil, 5, a grounding side lead wire, 6, a lightning invasion side lead wire, 7, an insulating layer, 8, an electromagnetic shielding layer, 9, a first coil, 10, a second coil, 11 and an insulating support body.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A lightning protection transmission network, as shown in fig. 1 to 3, comprising:
the transmission network compensation units are arranged in a plurality, are sequentially connected and are arranged between the outdoor equipment and the indoor equipment;
further comprising:
the lightning protection assembly is arranged between the outdoor equipment and the first transmission network compensation unit and comprises a discharge tube for transverse lightning protection and an isolation transformer for longitudinal lightning protection, one end of the isolation transformer is connected to the outdoor equipment, the other end of the isolation transformer is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the first transmission network compensation unit.
The transmission network compensation unit comprises a first parallel capacitor, a second parallel capacitor, a series inductor, a first resistor and a second resistor, wherein the first parallel capacitor, the parallel inductor and the second parallel capacitor are sequentially arranged, the first resistor and the second resistor are connected between the parallel inductor and the second parallel capacitor, and the first parallel capacitor and the second parallel capacitor are four-terminal capacitors. The transmission network compensation unit consists of an inductor, a capacitor and a resistor, forms a port network circuit, is equivalent to an equal-length cable, is used for compensating the actual insufficient cable length, and ensures the consistency of transmission impedance between the indoor equipment and each outdoor equipment.
Under the condition of not influencing the transmission characteristic of the original signal network, a transverse lightning protection piece and a longitudinal lightning protection piece are added in the original signal transmission network to form a lightning protection assembly, so that indoor electronic equipment can be effectively protected and the invasion of lightning current can be inhibited when lightning damage and surge voltage invade.
The discharge tube is a gas discharge tube. The isolation transformer is a high isolation transformer, improves the anti-interference capability, inhibits and transfers thunder and surge voltage on the premise of not influencing the transmission characteristic, and has extremely high electric strength. As shown in fig. 4, includes:
the iron core 2 is an ED type silicon steel core 2, and a fastening steel belt 3 is arranged on the outer side of the iron core 2;
the framework 1 is wound on the iron core 2;
the coil 4 is arranged on the framework 1 and is provided with a lightning invasion side outgoing line 6, an electronic equipment protection side outgoing line and a grounding side outgoing line 5, the lightning invasion side outgoing line 6 is located at one end of the framework 1, the electronic equipment protection side outgoing line and the grounding side outgoing line 5 are located at the other end of the framework 1, the primary and secondary isolation degree is improved, and after the whole high-isolation transformer is completely installed, integral vacuum paint dipping is carried out, so that the electric strength is improved.
The iron core 2 of the high isolation transformer adopts the ED type silicon steel iron core 2 with a high window, so that the sufficient winding width is ensured, the number of winding layers of the coil 4 is reduced as much as possible, and meanwhile, the loss of the iron core 2 is required to be reduced, so that the frequency of the iron core 2 is 400 Hz.
As shown in fig. 5, the coil 4 includes a second coil 10 for connecting the lightning-intrusion-side outgoing wire 6, and a first coil 9 for connecting the electronic-equipment protection side, and the turn ratio of the first coil 9 to the second coil 10 is 1: 1.
First insulating layers 7 are arranged between the first coil 9 and the framework 1 and between the second coil 10 and the framework 1.
The outside of first coil 9 is equipped with and is used for electromagnetic shield layer 8, and electromagnetic shield layer 8 includes the copper foil and locates the second insulating layer 7 on copper foil surface, and electromagnetic shield layer 8 connects ground side lead-out wire 5.
The winding width of the coil 4 is smaller than the width of the electromagnetic shielding layer 8, and the winding width of the coil 4 is larger than two tenths of the width of the electromagnetic shielding layer 8.
The main technology of the high-isolation transformer is the special design and manufacturability of the coil. The high-isolation transformer adopts the ED type silicon steel core with a high window, and mainly aims to increase the winding length of a coil and reduce the outer diameter size of the coil, because the high-isolation transformer mainly provides longitudinal protection, the turn ratio between the primary and the secondary is 1:1, and the transmission characteristic of a system is not changed. The insulating support body 11 is mainly used for supporting a retaining wall on the side surface of the coil and the electromagnetic shielding layer 8, and the flatness of the whole coil after winding is guaranteed.
Claims (9)
1. A lightning protection transport network comprising:
the transmission network compensation units are arranged in a plurality, are sequentially connected and are arranged between the outdoor equipment and the indoor equipment;
it is characterized by also comprising:
the lightning protection assembly is arranged between the outdoor equipment and the first transmission network compensation unit and comprises a discharge tube for transverse lightning protection and an isolation transformer for longitudinal lightning protection, one end of the isolation transformer is connected to the outdoor equipment, the other end of the isolation transformer is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the first transmission network compensation unit.
2. The lightning protection transmission network according to claim 1, wherein the transmission network compensation unit includes a first parallel capacitor, a second parallel capacitor, a series inductor, a first resistor and a second resistor, the first parallel capacitor, the parallel inductor and the second parallel capacitor are sequentially arranged, the first resistor and the second resistor are connected between the parallel inductor and the second parallel capacitor, and the first parallel capacitor and the second parallel capacitor are four-terminal capacitors.
3. The lightning protection transmission network of claim 1, wherein the discharge tube is a gas discharge tube.
4. The lightning protection transmission network according to claim 1, wherein the isolation transformer is a high isolation transformer comprising:
the iron core is an ED type silicon steel iron core, and a fastening steel belt is arranged on the outer side of the iron core;
the framework is wound on the iron core;
and the coil is arranged on the framework and is provided with a lightning invasion side outgoing line, an electronic equipment protection side outgoing line and a grounding side outgoing line, the lightning invasion side outgoing line is positioned at one end of the framework, and the electronic equipment protection side outgoing line, the grounding side outgoing line and the grounding side outgoing line are positioned at the other end of the framework.
5. The lightning protection transmission network according to claim 4, wherein the coil comprises a second coil for connecting the outgoing line on the lightning intrusion side and a first coil for connecting the protection side of the electronic equipment, and the turn ratio of the first coil to the second coil is 1: 1.
6. The lightning protection transmission network of claim 5 wherein a first insulating layer is disposed between each of the first and second coils and the bobbin.
7. The lightning protection transmission network according to claim 5, wherein an electromagnetic shielding layer is disposed on an outer side of the first coil, the electromagnetic shielding layer includes a copper foil and a second insulating layer disposed on a surface of the copper foil, and the electromagnetic shielding layer is connected to the ground side outgoing line.
8. The lightning protection transmission network of claim 7, wherein the windings have a winding width less than the width of the electromagnetic shielding layer.
9. The lightning protection transmission network of claim 8, wherein the windings have a winding width greater than two tenths of the width of the electromagnetic shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242249.9A CN113471946A (en) | 2020-03-31 | 2020-03-31 | Lightning protection transmission network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242249.9A CN113471946A (en) | 2020-03-31 | 2020-03-31 | Lightning protection transmission network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113471946A true CN113471946A (en) | 2021-10-01 |
Family
ID=77865211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010242249.9A Pending CN113471946A (en) | 2020-03-31 | 2020-03-31 | Lightning protection transmission network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113471946A (en) |
-
2020
- 2020-03-31 CN CN202010242249.9A patent/CN113471946A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2006064499B1 (en) | Magnetic induction device | |
| CN211629868U (en) | Lightning protection transmission network | |
| CN108092487B (en) | Device for suppressing track circuit harmonic wave | |
| CN113471946A (en) | Lightning protection transmission network | |
| CN207910458U (en) | The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road | |
| CN210478705U (en) | Track circuit balance current device | |
| CN107845496B (en) | Lightning protection transformer | |
| CN103748641B (en) | Including the high voltage device of insulation system | |
| CN209641511U (en) | A kind of current transformer preventing suspended voltage | |
| CN210575493U (en) | Trapezoidal interlayer insulation structure | |
| CN204936871U (en) | For the impedance means of 25Hz phase detecting track circuit | |
| KR100595639B1 (en) | Coupling apparatus for power line communication built-in impedance matching transformer | |
| CN219738729U (en) | Anti-interference through type current transformer with electromagnetic balance function | |
| CN110828127A (en) | High-frequency micro-electric protection mutual inductor | |
| KR100941488B1 (en) | Contactless Inductive Coupler | |
| CN110610799A (en) | Trapezoidal interlayer insulation structure | |
| CN203706716U (en) | High-flame-retardant heavy-current-interference-preventive environmental-friendly railway signal cable | |
| CN114709025B (en) | Rail transit information transmission cable shielding protection method and system | |
| CN108666095A (en) | A kind of isolating transformer | |
| CN212543370U (en) | Suppression device for power supply cable to track circuit harmonic space induction interference | |
| CN109698043B (en) | Wire for transformer winding and transformer | |
| CN217061742U (en) | Tubular bus bin with voltage and current transformer | |
| KR0173815B1 (en) | Induction Shielding High Voltage Transformer | |
| CN219958757U (en) | Mutual inductor with novel structure | |
| CN217588648U (en) | Multi-series-connection dry-type hollow parallel reactor with voltage class higher than 110kV |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |