CN204947592U - A kind of power distribution network lightning arrester - Google Patents
A kind of power distribution network lightning arrester Download PDFInfo
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- CN204947592U CN204947592U CN201520646725.8U CN201520646725U CN204947592U CN 204947592 U CN204947592 U CN 204947592U CN 201520646725 U CN201520646725 U CN 201520646725U CN 204947592 U CN204947592 U CN 204947592U
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Abstract
The utility model provides a kind of power distribution network lightning arrester, and its design feature is: comprise the first resistance, portable protective gaps in parallel and the second resistance; First resistance is connected in parallel with portable protective gaps in parallel, constituent components A; One end of assembly A and one end of the second resistance are connected in series; The ground connection when other end of the second resistance uses; First resistance is carborundum de-excitation resistance; Second resistance is Zinc-oxide piezoresistor.The utility model structure is simple, and cost is lower, is easy to install; Have during use and bear the various features such as overvoltage ability is high, long service life, power-frequency sparkover voltage are high, steep wave impulse sparkover voltage is low, lightning impulse residual voltage is low; Improve 50% than conventional ZnO arrester overvoltage ability, afterflow is also very little and life period is short, ensure that discharge stability.
Description
Technical field
The utility model relates to overvoltage protection, is specifically related to a kind of power distribution network lightning arrester being applicable to 6-66KV network system overvoltage protection.
Background technology
China 6-66KV electrical network overwhelming majority is isolated neutral system, generator on bus, circuit breaker, transformer, motor, the electric equipments such as voltage transformer are owing to closing a floodgate by unexpected, tripping operation, broken string, single-phase, the transient state that two-phase ground short circuit or three-phase shortcircuit occur is shoved and electrical surge overvoltage, they are all the inductance in network, the electromagnetic energy of electric capacity is because changing, bring out vibration and produce switching overvoltage or resonance overvoltage, light then cause the relatively unstable of system voltage, heavy then make the interior insulation breakdown of equipment, external insulation discharges, scaling loss equipment, especially the most serious with single-phase intermittent arc earthing overvoltage, one phase ground connection and then become heterogeneous ground connection, and often cause large-area power-cuts because process causes the expansion of accident not in time.
Current domestic and international market solves the superpotential main method of 6-66KV network system and product has: metal oxide arrester, resistance-capacitance absorption protective device etc., its effect is not all very good.
MOA metal oxide arrester: isolated neutral system; zinc oxide arrester must bear the long duration of action of single-phase earthing arc overvoltage; its threshold voltage must by bearing line voltage and considering that chargeability impact sets; its protected effect is very poor, and energy does not reach the time requirement of switching overvoltage yet.Meanwhile, because considering chargeability problem, the U1ma threshold values of MOA raises too high, the insulator of many transmission lines taken place frequently when being struck by lightning flashover, burst and cause tripping operation power outage.
RC resistance-capacitance absorption protective device: linear resistance wants the large energy of electric consumption, heating is very serious; Resistance value is excessive does not have effective overvoltage protection effect; Capacitor must adopt expensive high-voltage capacitance, and the excessive mains voltage waveform that also easily causes of condenser capacity distorts; RC resistance-capacitance absorption device can not replace the superpotential function of anti-lightning of lightning arrester.
Utility model content
The purpose of this utility model is: for problems of the prior art, provides that a kind of structure is simple, cost is lower, is easy to install and the good power distribution network lightning arrester of result of use.
The technical solution of the utility model is: power distribution network lightning arrester of the present utility model, and its design feature is: comprise the first resistance, portable protective gaps in parallel and the second resistance;
The first above-mentioned resistance is connected in parallel with portable protective gaps in parallel, constituent components A; One end of assembly A and one end of the second resistance are connected in series; The ground connection when other end of the second resistance uses;
The first above-mentioned resistance is carborundum de-excitation resistance; Second resistance is Zinc-oxide piezoresistor.
The utility model has positive effect: (1) power distribution network lightning arrester of the present utility model, and structure is simple, and cost is lower, is easy to install.(2) power distribution network lightning arrester of the present utility model; it in use; have and bear the various features such as overvoltage ability is high, long service life, power-frequency sparkover voltage are high, steep wave impulse sparkover voltage is low, lightning impulse residual voltage is low, effectively can improve the reliability of overvoltage protection.(3) power distribution network lightning arrester of the present utility model, its in use, than routine ZnO arrester overvoltage ability improve 50%, afterflow is also very little and life period is short, ensure that discharge stability.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Reference numeral in above-mentioned accompanying drawing is as follows:
First resistance 1, portable protective gaps 2, second resistance 3 in parallel.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 1, the power distribution network lightning arrester of the present embodiment, it comprises circuit arrangement, and its circuit arrangement forms primarily of the first resistance 1, portable protective gaps in parallel 2 and the second resistance 3.
First resistance 1 is connected in parallel with portable protective gaps 2 in parallel, constituent components A; One end of assembly A and one end of the second resistance 3 are connected in series; The ground connection when other end of the second resistance 3 uses.
In the present embodiment, the first resistance 1 preferably adopts carborundum de-excitation resistance (SiC non-linear resistor); Second resistance 3 preferably adopts Zinc-oxide piezoresistor (Zno varistor sheet).
The power distribution network lightning arrester of the present embodiment, it in use, when overvoltage raises, because of the first resistance 1(SiC non-linear resistor) resistance reduce than the second resistance 3(ZnO non-linear resistor) slow, overvoltage is transferred on the first resistance 1 greatly, makes the second resistance 3 delay voltage, and it can make the power distribution network lightning arrester of the present embodiment improve 50% than conventional ZnO arrester overvoltage ability, afterflow is also very little and life period is short, ensure that discharge stability.
To sum up; the power distribution network Novel lightning arrester of the present embodiment; structure is simple, cost is lower, bears that overvoltage ability is high, long service life, power-frequency sparkover voltage are high, steep wave impulse sparkover voltage is low, lightning impulse residual voltage is low, thus improves the reliability of overvoltage protection further.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not when departing from spirit and scope of the present utility model; can also make various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into scope of patent protection of the present utility model.
Claims (1)
1. a power distribution network lightning arrester, is characterized in that: comprise the first resistance (1), portable protective gaps in parallel (2) and the second resistance (3);
Described the first resistance (1) is connected in parallel with portable protective gaps in parallel (2), constituent components A; One end of assembly A and one end of the second resistance (3) are connected in series; The ground connection when other end of the second resistance (3) uses;
Described the first resistance (1) is carborundum de-excitation resistance; Second resistance (3) is Zinc-oxide piezoresistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646725.8U CN204947592U (en) | 2015-08-25 | 2015-08-25 | A kind of power distribution network lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646725.8U CN204947592U (en) | 2015-08-25 | 2015-08-25 | A kind of power distribution network lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204947592U true CN204947592U (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520646725.8U Expired - Fee Related CN204947592U (en) | 2015-08-25 | 2015-08-25 | A kind of power distribution network lightning arrester |
Country Status (1)
| Country | Link |
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| CN (1) | CN204947592U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401179A (en) * | 2019-06-21 | 2019-11-01 | 国网江苏省电力有限公司泰州供电分公司 | A kind of low voltage power transmission net self- recoverage shock resistance structure |
| CN112951530A (en) * | 2021-03-29 | 2021-06-11 | 北京交通大学 | Aging-resistant composite arrester with gap for electric locomotive and motor train unit |
| CN114336562A (en) * | 2021-12-03 | 2022-04-12 | 广东电网有限责任公司 | Transformer lightning overvoltage protection device |
| CN115312280A (en) * | 2022-09-08 | 2022-11-08 | 北京交通大学 | Anti-aging composite lightning arrester with parallel gaps |
-
2015
- 2015-08-25 CN CN201520646725.8U patent/CN204947592U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401179A (en) * | 2019-06-21 | 2019-11-01 | 国网江苏省电力有限公司泰州供电分公司 | A kind of low voltage power transmission net self- recoverage shock resistance structure |
| CN110401179B (en) * | 2019-06-21 | 2022-03-08 | 国网江苏省电力有限公司泰州供电分公司 | Low-voltage power transmission network self-recovery impact-resistant structure |
| CN112951530A (en) * | 2021-03-29 | 2021-06-11 | 北京交通大学 | Aging-resistant composite arrester with gap for electric locomotive and motor train unit |
| CN114336562A (en) * | 2021-12-03 | 2022-04-12 | 广东电网有限责任公司 | Transformer lightning overvoltage protection device |
| CN115312280A (en) * | 2022-09-08 | 2022-11-08 | 北京交通大学 | Anti-aging composite lightning arrester with parallel gaps |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 |