CN202997558U - Power transmission line instant wave overvoltage buffer device - Google Patents
Power transmission line instant wave overvoltage buffer device Download PDFInfo
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- CN202997558U CN202997558U CN 201320005574 CN201320005574U CN202997558U CN 202997558 U CN202997558 U CN 202997558U CN 201320005574 CN201320005574 CN 201320005574 CN 201320005574 U CN201320005574 U CN 201320005574U CN 202997558 U CN202997558 U CN 202997558U
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- overvoltage
- discharging gap
- zinc oxide
- voltage
- transmission line
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000011787 zinc oxide Substances 0.000 claims abstract description 43
- 238000007599 discharging Methods 0.000 claims abstract description 35
- 238000004146 energy storage Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 abstract 1
- 230000004224 protection Effects 0.000 description 10
- 230000032683 aging Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229920000260 silastic Polymers 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The utility model relates to a power transmission line instant wave overvoltage buffer device comprising a discharging gap and a high electric potential gradient zinc oxide resistor. The power transmission line instant wave overvoltage buffer device is characterized in that the discharging gap and the high electric potential gradient zinc oxide resistor are connected in series; at a normal line voltage, the high electric potential gradient zinc oxide resistor is in an isolated state relative to the power grid voltage, and the discharging gap is not powered on; and in overvoltage conditions where the voltage across the discharging gap exceeds the bearing limit of the discharging gap and the discharging gap discharges electricity and is powered on, the overvoltage is applied to two ends of the high electric potential gradient zinc oxide resistor, the high electric potential gradient zinc oxide resistor changes from a high resistance state to a low resistance state, and overvoltage energy is discharged.
Description
Technical field
The utility model relates to a kind of transmission line moment ripple overvoltage buffer unit, belongs to the technical field of overvoltage protection.
Background technology
At present, ZnO resistors and silastic material are transmission line performance overvoltage protections best and with fastest developing speed.By improving protected equipment dependability and the over-voltage level can be brought good effect; and the nonlinear resistance property of zinc oxide valve plate plays vital effect to over-voltage; so countries in the world are all in do one's utmost raw material and the production technology of Improvement zinc oxide valve plate; improve the service conditions of ZnO resistors; the monitoring of raising system and protective capacities; and make every effort to up-to-date technology is applied in the design of over-voltage device; while development of new material is to reaching more preferably protection effect.
Nowadays, ZnO resistors over-voltage device is at sealing problem, performance, effectively block and be still waiting on power frequency continued flow, problem of aging to improve, it is mainly the Sealing Technology imperfection, or the encapsulant ageing resistace that adopts is unstable, can not effectively block power frequency continued flow when difference variation is larger.Immerse because its poor sealing make moisture near the life of product later stage running time, causes built-in electrical insulation to damage, thereby accelerated the aging of resistor disc until damage, and can not make timely processing, affects electric power netting safe running.
The utility model content
For the over-voltage amplitude, the protection power equipment is avoided the damage of overvoltage energy.Monitor simultaneously operation conditions and action frequency, for operation of power networks provides safety guarantee, the utility model proposes a kind of transmission line moment ripple overvoltage buffer unit, have: discharging gap and high-potential gradient zinc oxide resistance is characterized in that:
Discharging gap and the series connection of high-potential gradient zinc oxide resistance;
Under regular link voltage, the zinc oxide resistance sheet of high-potential gracient is in isolation for line voltage, not conducting of discharging gap;
When over-voltage condition, be that voltage on discharging gap is when surpassing it and bearing amount discharge conducting, overvoltage is added in the two ends of the zinc oxide resistance sheet of high-potential gracient, and the ZnO resistors of high-potential gracient becomes low resistance state by high resistance, the overvoltage of releasing energy.
The utility model is than traditional excess voltage protection; rush of current ability and through-current capability with intensifier; the weight and volume of alleviator; improve the condition of resistor disc long-term work; the advantage that extends the useful life of resistor disc, the damage that the overvoltage such as thunder and lightning and operation are caused can play a good protection.
Description of drawings
Fig. 1 is the structure chart of transmission line moment ripple overvoltage buffer unit of the present utility model;
Fig. 2 is the structural representation of monitor of the present utility model;
Fig. 3 is the electric theory diagram of transmission line moment ripple overvoltage buffer unit of the present utility model.
Embodiment
In Fig. 1,1 is high-voltage terminal, and 2 is discharging gap, and 3 is high-potential gradient zinc oxide resistance, and 4 is silastic material, and 5 is monitor, and 6 is earth connection, and 7 is earth electrode, and 8 is insulating cylinder, and 9 is electrode, and 29 is the high-voltage terminal end, and 30 is high-voltage line, and 20 is insulator.
In Fig. 2,10 is the ZnO resistors valve block, and 11 is support, 12 is interface, and 13 are the screens device, and 14 is the magnetic driven circuit, 15 is counter, and 16 is runner, and 17 is rectification circuit, 18 are pressure resistance, and 19 for inhaling sheet, and 21 is energy storage capacitor, 22 is wire, 23 is current-limiting resistance, and 24 is connecting rod, and 25 is the counter binding post.
Transmission line moment ripple overvoltage buffer unit is mainly used in transmission line, is connected in parallel on transmission line together with insulator.Its major advantage is: adopt the resistor disc of high-potential gracient to strengthen rush of current ability and the through-current capability of installing, greatly alleviated the weight and volume of device.Discharging gap makes resistor disc and the line voltage isolation of high-potential gracient, only bears overvoltage under over-voltage condition, has improved greatly the condition of resistor disc long-term work, has extended the useful life of resistor disc.And discharge counter can effectively be monitored superpotential action frequency, records the abnormal conditions such as overvoltage.
The specific works process of device is:
Under regular link voltage, the zinc oxide resistance sheet 3 of high-potential gracient is in isolation for line voltage, discharging gap 2 not conductings.
When over-voltage condition, the voltage on discharging gap 2 surpasses it and bears amount discharge conducting.At this moment, overvoltage is added in zinc oxide resistance sheet 3 two ends of high-potential gracient, and the ZnO resistors 3 of high-potential gracient becomes low resistance state by high resistance immediately, the overvoltage of releasing energy.The overvoltage energy pulse of releasing flows through discharge counter 5, by 10 pressures of ZnO resistors valve block and rectification circuit 17 rectifications, change mild electric current in energy storage capacitor 21 energy storage, be discharged into and produce the magnetic that continues on magnetic driven circuit 14, electromagnetism is inhaled attracting sheet 19, stir screens device 13, make the runner 16 on counter 15 rotate lattice, reach the order ground of counting
When the voltage on high-voltage line 30 recovered normal, 3 of the zinc oxide resistance sheets of high-potential gracient became high resistance, and discharging gap 2 extinguish arcs are blocked power frequency continued flow.Inhaling moving screens device 13 resets.
The discharging gap of device and the ZnO resistors of high-potential gracient are protected each other.It is zero that discharging gap makes the ZnO resistors chargeability of high-potential gracient, has solved the problem of aging of ZnO resistors valve block, and discharging gap is fragile when afterflow, and the superior performance of ZnO resistors valve block makes it without afterflow.In addition device adopt silastic material than traditional porcelain overcoat have that insulation characterisitic is good, dielectric strength is high, the advantages such as ageing-resistant, explosion-proof, hydrophobicity, sealing.In sum, installing the damage that the overvoltage such as thunder and lightning and operation are caused can play a good protection.
An embodiment of the present utility model is a kind of transmission line moment ripple overvoltage buffer unit, be applied in transmission line, be connected in parallel on transmission line together with insulator, this transmission line moment ripple overvoltage buffer unit comprises: discharging gap, high-potential gradient zinc oxide resistance, pressure circuit, rectification circuit, energy storage capacitor, magnetic driven circuit, screens device sum counter is characterized in that:
Discharging gap and the series connection of high-potential gradient zinc oxide resistance, both protect each other, it is zero that discharging gap makes the electric charge rate, solved the problem of aging of ZnO resistors valve block, and discharging gap makes resistor disc and the line voltage isolation of high-potential gracient, only bear overvoltage under over-voltage condition, discharging gap is fragile when afterflow, and the ZnO resistors valve block can make it without afterflow;
The pressure circuit carries out pressure to the overvoltage energy pulse through discharge counter of releasing;
Rectification circuit carries out rectification to the output current of pressure circuit, is converted into mild electric current;
The electric current of energy storage capacitor storage rectification circuit output;
Counter can be monitored superpotential action frequency, records the overvoltage abnormal conditions;
With the electric current of storage when being discharged on the magnetic driven circuit, the magnetic driven circuit produces the magnetic that continues, and inhales moving screens device when energy storage capacitor, and the runner on counter rotates lattice, reaches the order ground of counting;
Under regular link voltage, the zinc oxide resistance sheet of high-potential gracient is in isolation for line voltage, not conducting of discharging gap; When over-voltage condition, be that voltage on discharging gap is when surpassing it and bearing amount discharge conducting, overvoltage is added in the two ends of the zinc oxide resistance sheet of high-potential gracient, and the ZnO resistors of high-potential gracient becomes low resistance state by high resistance, the overvoltage of releasing energy;
When the voltage on high-voltage line recovered normal, the zinc oxide resistance sheet of high-potential gracient became high resistance, and the discharging gap extinguish arcs is blocked power frequency continued flow, inhaled moving screens device and resetted.
The utility model is by connecting discharging gap and high-potential gradient zinc oxide resistance; make both to protect each other; it is zero that discharging gap makes the electric charge rate; solved the problem of aging of ZnO resistors valve block; and discharging gap makes resistor disc and the line voltage isolation of high-potential gracient; only bear overvoltage under over-voltage condition, discharging gap is fragile when afterflow, and the ZnO resistors valve block can make it without afterflow.
The transmission line overvoltage protection has great importance, and the superiority of device is high, and performance and protection effect are very obvious, are with a wide range of applications.
The above embodiment has only expressed the utility model preferred embodiment, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (3)
1. transmission line moment ripple overvoltage buffer unit, have: discharging gap and high-potential gradient zinc oxide resistance is characterized in that:
Discharging gap and the series connection of high-potential gradient zinc oxide resistance;
Under regular link voltage, the zinc oxide resistance sheet of high-potential gracient is in isolation for line voltage, not conducting of discharging gap;
When over-voltage condition, be that voltage on discharging gap is when surpassing it and bearing amount discharge conducting, overvoltage is added in the two ends of the zinc oxide resistance sheet of high-potential gracient, and the ZnO resistors of high-potential gracient becomes low resistance state by high resistance, the overvoltage of releasing energy.
2. a kind of transmission line moment ripple overvoltage buffer unit as claimed in claim 1, it is characterized in that: this device also comprises pressure circuit, rectification circuit, energy storage capacitor, magnetic driven circuit, screens device sum counter;
The pressure circuit carries out pressure to the overvoltage energy pulse through discharge counter of releasing;
Rectification circuit carries out rectification to the output current of pressure circuit, is converted into mild electric current;
The electric current of energy storage capacitor storage rectification circuit output;
With the electric current of storage when being discharged on the magnetic driven circuit, the magnetic driven circuit produces the magnetic that continues, and inhales moving screens device when energy storage capacitor, and the runner on counter rotates lattice, reaches the order ground of counting.
3. a kind of transmission line moment ripple overvoltage buffer unit as claimed in claim 2 is characterized in that:
When the voltage on high-voltage line recovered normal, the zinc oxide resistance sheet of high-potential gracient became high resistance, and the discharging gap extinguish arcs is blocked power frequency continued flow, inhaled moving screens device and resetted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005574 CN202997558U (en) | 2013-01-06 | 2013-01-06 | Power transmission line instant wave overvoltage buffer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005574 CN202997558U (en) | 2013-01-06 | 2013-01-06 | Power transmission line instant wave overvoltage buffer device |
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| Publication Number | Publication Date |
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| CN202997558U true CN202997558U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320005574 Expired - Lifetime CN202997558U (en) | 2013-01-06 | 2013-01-06 | Power transmission line instant wave overvoltage buffer device |
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| CN (1) | CN202997558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300524A (en) * | 2014-09-22 | 2015-01-21 | 合肥凯正电气技术有限公司 | Large-capacity overvoltage protection device |
-
2013
- 2013-01-06 CN CN 201320005574 patent/CN202997558U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300524A (en) * | 2014-09-22 | 2015-01-21 | 合肥凯正电气技术有限公司 | Large-capacity overvoltage protection device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |