CN203839939U - Lightning protection equipment for transmission line monitoring system - Google Patents
Lightning protection equipment for transmission line monitoring system Download PDFInfo
- Publication number
- CN203839939U CN203839939U CN201420259085.0U CN201420259085U CN203839939U CN 203839939 U CN203839939 U CN 203839939U CN 201420259085 U CN201420259085 U CN 201420259085U CN 203839939 U CN203839939 U CN 203839939U
- Authority
- CN
- China
- Prior art keywords
- transmission line
- protection circuit
- piezo
- resistance
- direct current
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses lightning protection equipment for a transmission line monitoring system, which comprises a direct current forward transmission line, a direct current negative transmission line, a primary protection circuit and a secondary protection circuit, wherein the primary protection circuit comprises a first varistor, a second varistor, a third varistor and a plurality of parallel gaseous discharge tubes, two ends of a serial branch composed of the second varistor and the third varistor and two ends of the first varistor are respectively connected with the direct current forward transmission line and the direct current negative transmission line, one end of a parallel branch composed of the plurality of parallel gaseous discharge tubes in the primary protection circuit is connected onto the line between the second varistor and the third varistor, and the other end is grounded. The secondary protection circuit comprises a fourth varistor, a transient voltage suppression diode and a plurality of parallel gaseous discharge tubes. According to the lightning protection equipment for a transmission line monitoring system, most lightning current is discharged via the primary protection circuit, and residual voltage is further reduced via the secondary protection circuit to protect the transmission line monitoring system.
Description
Technical field
The utility model relates to power equipment area of maintenance, specifically the thunder resisting equipment of power transmission line monitoring system.
Background technology
Transmission line is the important component part of electrical network, and it is not only and carries and distribute the carrier of electric energy, several electrical networks can also be coupled together to formation electric power system.Transmission line malfunction is the inducement of electric network fault; once there is problem in a certain position of power circuit; can produce chain reaction; affect the operation of whole network system; so the safe operation of transmission line is the guarantee of electric power netting safe running, the protection of transmission line is one of major tasks of protection of electric power facility.
For the ease of transmission line is safeguarded, existing transmission line is equipped with a large amount of monitoring systems conventionally, as transmission line wire temperature monitoring system, incline monitoring system for electric transmission line pole, powerline ice-covering early warning monitoring system, transmission line burglar alarm monitoring system etc., can effectively carry out early warning to transmission line malfunction section by these monitoring systems.But, the monitoring system of transmission line is generally arranged on open air, subject to thunderbolt and cause inner circuit can produce overvoltage or the overcurrent of transient state, this can affect the performance of power transmission line monitoring system, even can cause to monitoring system the damage of irrecoverability.
Utility model content
The monitoring system that the purpose of this utility model is to overcome existing transmission line is subject to the problem of broken by lightning, the thunder resisting equipment of power transmission line monitoring system is provided, it can not only absorb overvoltage and overcurrent, can also absorb residual voltage, and then can reduce the probability that power transmission line monitoring system damages.
The utility model addresses the above problem and is achieved through the following technical solutions: the thunder resisting equipment of power transmission line monitoring system, comprise direct current forward transmission line, direct current negative sense transmission line, elementary protection circuit and secondary protection circuit, described elementary protection circuit comprises the first piezo-resistance, the second piezo-resistance, the gas discharge tube of the 3rd piezo-resistance and multiple parallel connections, described the second piezo-resistance is connected with the 3rd piezo-resistance, the second piezo-resistance is connected with direct current forward transmission line and direct current negative sense transmission line respectively with series arm two ends and the first piezo-resistance two ends that the 3rd piezo-resistance forms, parallel branch one end that in elementary protection circuit, the gas discharge tube of multiple parallel connections forms is connected on the circuit between the second piezo-resistance and the 3rd piezo-resistance, its other end ground connection, described secondary protection circuit comprises the gas discharge tube of the 4th piezo-resistance, transient voltage suppressor diode and multiple parallel connections, described the 4th piezo-resistance is in parallel with transient voltage suppressor diode, the 4th piezo-resistance is connected with direct current forward transmission line and direct current negative sense transmission line respectively with the parallel branch two ends that transient voltage suppressor diode forms, parallel branch one end that in secondary protection circuit, the gas discharge tube of multiple parallel connections forms is connected with direct current negative sense transmission line, its other end ground connection.Wherein, piezo-resistance is a kind of votage limit type protection device, utilizes the nonlinear characteristic of piezo-resistance, when overvoltage appears at two interpolars of piezo-resistance; piezo-resistance can be by voltage clamping to relatively-stationary magnitude of voltage, thereby realizes the protection to late-class circuit.Gas discharge tube is a kind of switching mode protection device, and in the time that two voltage across poles are enough large, pole clearance, by discharge breakdown, is converted into conduction state by original state of insulation.Transient voltage suppressor diode is a kind of FV, and effect is similar with piezo-resistance, and it is also to utilize the nonlinear characteristic of device that overvoltage clamper to lower magnitude of voltage is realized to the protection to late-class circuit.When the utility model application, for the DC interface place of power transmission line monitoring system, elementary protection circuit and secondary protection circuit set gradually to the circuit between power transmission line monitoring system at power supply.
Further, the thunder resisting equipment of power transmission line monitoring system, also comprises the decoupling circuit being arranged between elementary protection circuit and secondary protection circuit.When the utility model application, decoupling circuit plays time-lag action, can promote barrier propterty.
Further, described decoupling circuit is the feed line that direct current forward transmission line between elementary protection circuit and secondary protection circuit and direct current negative sense transmission line form.Decoupling circuit of the present utility model is made up of direct current forward transmission line and direct current negative sense transmission line, the feed line effect that adopts wire to form is similar to inductance, but its performance is better than inductance, it can overcome the excessive and problem that cannot realize on circuit of the volume of air core inductor in the time that monitoring system supply current is large.
Further, in described elementary protection circuit, the quantity of piezo-resistance is two.
Further, the quantity of described elementary protection circuit and secondary protection circuit gas discharge tube is two.
Further, the thunder resisting equipment of power transmission line monitoring system, also comprise the first fuse FU1 and the second fuse FU2, described the first fuse FU1 is serially connected on the direct current forward transmission line 1 of the preposition circuit of elementary protection circuit, and the second fuse FU2 is serially connected on the direct current negative sense transmission line 2 of the preposition circuit of elementary protection circuit.So, in the time of elementary protection circuit of the present utility model and the damage of secondary protection circuit, fuse blows, the damage that can further avoid overcurrent to cause power transmission line monitoring system.
In sum, the utlity model has following beneficial effect: the utility model comprises elementary protection circuit and secondary protection circuit, wherein, elementary protection circuit comprises the first piezo-resistance, the second piezo-resistance, the gas discharge tube of the 3rd piezo-resistance and multiple parallel connections, secondary protection circuit comprises the 4th piezo-resistance, the gas discharge tube of transient voltage suppressor diode and multiple parallel connections, elementary protection circuit adopts the mode that piezo-resistance is combined with gas discharge tube to carry out common mode protection, secondary protection circuit adopts that the 4th piezo-resistance is in parallel with transient voltage suppressor diode carries out differential mode protection, adopt multiple gas discharge tube parallel connections to carry out common mode protection, when the utility model is struck by lightning, most overvoltage and overcurrent are released by the gas discharge tube of elementary protection circuit, secondary protection circuit will be exported residual voltage again and further reduce, so, can reach the object of protection power transmission line monitoring system, reduce the probability that power transmission line monitoring system damages.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of a specific embodiment of the utility model.
In accompanying drawing, the corresponding name of Reference numeral is called: 1, direct current forward transmission line, 2, direct current negative sense transmission line, FU1, the first fuse, FU2, the second fuse, Rv1, the first piezo-resistance, Rv2, the second piezo-resistance, Rv3, the 3rd piezo-resistance, Rv4, the 4th piezo-resistance, TVS1, transient voltage suppressor diode, G1, the first gas discharge tube, G2, the second gas discharge tube, G3, the 3rd gas discharge tube, G4, the 4th gas discharge tube.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but execution mode of the present utility model is not limited to this.
Embodiment 1:
As shown in Figure 1, the thunder resisting equipment of power transmission line monitoring system, comprise direct current forward transmission line 1, direct current negative sense transmission line 2, elementary protection circuit and secondary protection circuit, wherein, elementary protection circuit comprises the first piezo-resistance Rv1, the second piezo-resistance Rv2, the gas discharge tube of the 3rd piezo-resistance Rv3 and multiple parallel connections, the first piezo-resistance Rv1 two ends are connected with direct current forward transmission line 1 and direct current negative sense transmission line 2 respectively, the second piezo-resistance Rv2 connects with the 3rd piezo-resistance Rv3, the second piezo-resistance Rv2 is connected with direct current forward transmission line 1 and direct current negative sense transmission line 2 respectively with the series arm two ends that the 3rd piezo-resistance Rv3 forms.In the present embodiment, the quantity of the gas discharge tube of elementary protection circuit is all preferably two, in elementary protection circuit, two gas discharge tubes are respectively the first gas discharge tube G1 and the second gas discharge tube G2, the first gas discharge tube G1 is connected on the circuit between the second piezo-resistance Rv2 and the 3rd piezo-resistance Rv3 with parallel branch one end of the second gas discharge tube G2 formation in parallel, its other end ground connection.Secondary protection circuit comprises the gas discharge tube of the 4th piezo-resistance Rv4, transient voltage suppressor diode TVS1 and multiple parallel connections, the 4th piezo-resistance Rv4 is in parallel with transient voltage suppressor diode TVS1, and the 4th piezo-resistance Rv4 is connected with direct current forward transmission line 1 and direct current negative sense transmission line 2 respectively with the parallel branch two ends that transient voltage suppressor diode TVS1 forms.In the present embodiment, the quantity of the gas discharge tube of secondary protection circuit is also preferably two, two gas discharge tubes of secondary protection circuit are respectively the 3rd gas discharge tube G3 and the 4th gas discharge tube G4, the 3rd gas discharge tube G3 is connected with direct current negative sense transmission line 2 with the 4th gas discharge tube G4 parallel branch one end forming in parallel, its other end ground connection.The 4th piezo-resistance Rv4 and three gas discharge tube G3 and four gas discharge tube G4 in parallel formation multiple parallel branches in parallel with transient voltage suppressor diode TVS1 in the present embodiment, can reach the object that reduces residual voltage and increase negotiability.
Circuit between DC interface and power supply that in the present embodiment, direct current forward transmission line 1 and direct current negative sense transmission line 2 are power transmission line monitoring system, wherein, elementary protection circuit and secondary protection circuit are set gradually by power supply to power transmission line monitoring system.When the present embodiment application, the first piezo-resistance Rv1 of most of lightning current by elementary protection circuit and the 3rd piezo-resistance Rv3 or after the second piezo-resistance Rv2, release through the first gas discharge tube G1 or the second gas discharge tube G2 again, after elementary protection circuit is released, a part for remaining lightning current is again after the 4th piezo-resistance Rv4 or transient voltage suppressor diode TVS1, then releases through the 3rd gas discharge tube G3 or the 4th gas discharge tube G4.So, the present embodiment further reduces residual voltage by secondary protection circuit again after elementary protection circuit is released most of lightning current, so that power transmission line monitoring system is protected.
Embodiment 2:
The present embodiment has been made following further restriction on the basis of embodiment 1: the present embodiment also comprises the decoupling circuit being arranged between elementary protection circuit and secondary protection circuit, wherein, decoupling circuit is the feed line that direct current forward transmission line 1 between elementary protection circuit and secondary protection circuit and direct current negative sense transmission line 2 form.
Embodiment 3:
The present embodiment has been made following further restriction on the basis of embodiment 1 or embodiment 2: the present embodiment also comprises two fuses, be respectively the first fuse FU1 and the second fuse FU2, wherein, the first fuse FU1 is serially connected on the direct current forward transmission line 1 of the preposition circuit of elementary protection circuit, and the second fuse FU2 is serially connected on the direct current negative sense transmission line 2 of the preposition circuit of elementary protection circuit.In this practicality example in the time there is overcurrent or short circuit, the first fuse FU1 or the second fuse FU2 fusing, can further ensure the fail safe of power transmission line monitoring system.
As mentioned above, can realize preferably the utility model.
Claims (5)
1. the thunder resisting equipment of power transmission line monitoring system, it is characterized in that, comprise direct current forward transmission line (1), direct current negative sense transmission line (2), elementary protection circuit and secondary protection circuit, described elementary protection circuit comprises the first piezo-resistance (Rv1), the second piezo-resistance (Rv2), the gas discharge tube of the 3rd piezo-resistance (Rv3) and multiple parallel connections, described the second piezo-resistance (Rv2) is connected with the 3rd piezo-resistance (Rv3), the second piezo-resistance (Rv2) is connected with direct current forward transmission line (1) and direct current negative sense transmission line (2) respectively with series arm two ends and the first piezo-resistance (Rv1) two ends that the 3rd piezo-resistance (Rv3) forms, parallel branch one end that in elementary protection circuit, the gas discharge tube of multiple parallel connections forms is connected on the circuit between the second piezo-resistance (Rv2) and the 3rd piezo-resistance (Rv3), its other end ground connection, described secondary protection circuit comprises the 4th piezo-resistance (Rv4), the gas discharge tube of transient voltage suppressor diode (TVS1) and multiple parallel connections, described the 4th piezo-resistance (Rv4) is in parallel with transient voltage suppressor diode (TVS1), the 4th piezo-resistance (Rv4) is connected with direct current forward transmission line (1) and direct current negative sense transmission line (2) respectively with the parallel branch two ends that transient voltage suppressor diode (TVS1) forms, parallel branch one end that in secondary protection circuit, the gas discharge tube of multiple parallel connections forms is connected with direct current negative sense transmission line (2), its other end ground connection.
2. the thunder resisting equipment of power transmission line monitoring system according to claim 1, is characterized in that, also comprises the decoupling circuit being arranged between elementary protection circuit and secondary protection circuit.
3. the thunder resisting equipment of power transmission line monitoring system according to claim 2, it is characterized in that, described decoupling circuit is the feed line that direct current forward transmission line (1) between elementary protection circuit and secondary protection circuit and direct current negative sense transmission line (2) form.
4. the thunder resisting equipment of power transmission line monitoring system according to claim 1, is characterized in that, the quantity of described elementary protection circuit and secondary protection circuit gas discharge tube is two.
5. according to the thunder resisting equipment of the power transmission line monitoring system described in any one in claim 1～4, it is characterized in that, also comprise the first fuse (FU1) and the second fuse (FU2), described the first fuse (FU1) is serially connected on the direct current forward transmission line (1) of the preposition circuit of elementary protection circuit, and the second fuse (FU2) is serially connected on the direct current negative sense transmission line (2) of the preposition circuit of elementary protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259085.0U CN203839939U (en) | 2014-05-21 | 2014-05-21 | Lightning protection equipment for transmission line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259085.0U CN203839939U (en) | 2014-05-21 | 2014-05-21 | Lightning protection equipment for transmission line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203839939U true CN203839939U (en) | 2014-09-17 |
Family
ID=51517738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420259085.0U Expired - Fee Related CN203839939U (en) | 2014-05-21 | 2014-05-21 | Lightning protection equipment for transmission line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203839939U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| US10855075B2 (en) | 2017-11-15 | 2020-12-01 | Fanuc Corporation | Surge protective circuit and surge protective device |
-
2014
- 2014-05-21 CN CN201420259085.0U patent/CN203839939U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| US10855075B2 (en) | 2017-11-15 | 2020-12-01 | Fanuc Corporation | Surge protective circuit and surge protective device |
| DE102018008712B4 (en) | 2017-11-15 | 2021-08-19 | Fanuc Corporation | Overvoltage protection circuit and overvoltage protection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104009460A (en) | Lighting protection device for power transmission line monitoring system | |
| CN104009455A (en) | Electric transmission line monitoring system protecting device for lightning protection | |
| CN106159926A (en) | A kind of surge protection circuit and Surge Protector | |
| CN206471814U (en) | Network two-in-one lightning | |
| CN103023003B (en) | Overvoltage absorbing circuit and overvoltage absorbing device | |
| CN104124783A (en) | Electricity fetching device based on electric transmission line aerial thunder prevention ground wires | |
| CN203839936U (en) | Lighting protection device for electric transmission line monitoring system | |
| CN102709902A (en) | Surge current protection device | |
| CN203839939U (en) | Lightning protection equipment for transmission line monitoring system | |
| CN203562774U (en) | Alternating-current lightning protection module for LED lighting equipment | |
| CN203839935U (en) | Electric transmission line monitoring system protection device for lightning protection | |
| CN205123248U (en) | Anti lightning surge circuit | |
| CN204858537U (en) | Battery discharge short -circuit protection circuit | |
| CN104009456A (en) | Lightning protection device for power transmission line monitoring system | |
| CN110768226A (en) | MOV overvoltage protection device based on zinc oxide nonlinear resistor | |
| CN202586322U (en) | Tripping type lightning protection circuit | |
| CN203014377U (en) | Power grid overvoltage inhibition apparatus | |
| CN202633929U (en) | Surge protection device | |
| CN204012686U (en) | A kind of serial interface circuit with lightning protection function | |
| CN203180507U (en) | High-capacity overvoltage absorber | |
| CN206481055U (en) | Lightning protection device | |
| CN201690231U (en) | Nonlinear neutral point ground resistor | |
| CN205646796U (en) | Mining monitoring substation surge protection circuit | |
| CN206379875U (en) | Surge protection circuit for locomotive dc source electrical equipment | |
| CN206471803U (en) | A kind of header box protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20200521 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |