CN203445611U - Lightning protection over-voltage isolator - Google Patents
Lightning protection over-voltage isolator Download PDFInfo
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- CN203445611U CN203445611U CN201320601662.5U CN201320601662U CN203445611U CN 203445611 U CN203445611 U CN 203445611U CN 201320601662 U CN201320601662 U CN 201320601662U CN 203445611 U CN203445611 U CN 203445611U
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- lightning
- sleeve pipe
- bushing
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- frequency
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Abstract
The utility model provides users with a lightning protection over-voltage isolator including an LRC circuit enclosed in a high voltage impact resistant insulation sealed bushing and formed by series connection of multiple stages of L[i]r[i]c[i] unit circuits. Each L[i]r[i]c[i] unit circuit is composed of a high voltage impact resistant inductance coil installed in the bushing and a plurality of nano intensive induction magnetic rings sleeved in a spaced fixed manner onto the outer surface of the inductance coil. The two nano intensive induction magnetic rings on two end portions in the bushing are connected respectively with metal flanges fixedly sleeved on the two ends of the bushing. The metal flanges on the two ends of the bushing are connected in series onto a phase line of a three-phase power transmission line of an outbound end of a network transformer through a power line, and a high-power low-pass filter having an equivalent inductance of 100-260[mu]H and an equivalent capacitance of 80-200pF is obtained. The lightning protection over-voltage isolator is capable of buffering and isolating over-voltage impacts, enabling the lightning damage not to be spread to a substation and thus achieving lightning isolation protection of the substation.
Description
Technical field
The utility model relates to a kind of anti-lightning overvoltage isolator, is that it is mounted on the approach line of transformer station's lines for the important building block of ultra-high-tension power transmission line thunder-lightning system specifically.
Background technology
Thunder and lightning is a kind of electric discharge phenomena of earth atmosphere, when normally electronegative thundercloud and the electric field strength between the earth have surpassed therebetween the breakdown strength of atmosphere, the pulsed discharge between thundercloud and the earth has occurred, and is exactly the said thunderbolts of people.In thundercloud discharge process, discharging current sharply increases, at lightning, arrive the moment on ground, lightning current is up to tens of kilo-amperes, even up to hundreds of kilo-amperes, potential difference at lightning channel two ends can reach hundreds thousand of volt, and lightning current place of arrival can cause intense electromagnetic, heat energy and mechanical damage effect.
Along with modern electronic technology constantly develops, a large amount of electronic equipments are widely used in electric power system, are arranged on the weak current equipment in substation secondary information system, unavoidably often suffer the invasion and attack of direct lightning strike, induction thunder thunder and lightning transient overvoltage.Because the operating voltage of electronic equipment only has several volts, the electric current of transmission of information is also very little, and interference is to external world extremely responsive, and the voltage of thunder and lightning is up to hundreds thousand of volts, and immediate current, up to hundreds thousand of amperes, has very large destructiveness to weak current equipment.Therefore, eliminating the harm of thunder and lightning to weak current equipment in secondary information system, is the key point that ensures substation safety, stable operation.
Summary of the invention
Goal of the invention of the present utility model is: for user provides a kind of anti-lightning overvoltage isolator, for the important building block of ultra-high-tension power transmission line thunder-lightning system, it is mounted on A, B, the C three phase line of substation transformer three-phase departures end, buffering and isolation that realization is impacted lightning overvoltage, reduced the impact of overvoltage to transformer, thunder and lightning is destroyed and be difficult to be diffused into transformer station, equivalence has improved the lightning withstand level of transformer station.
Realize goal of the invention of the present utility model, adopt following technical proposals:
A lightning overvoltage isolator, is characterized in that: include one and be enclosed in high pressure resistant impact insulated enclosure sleeve pipe, by multistage
l ir
ic
ithe LRC circuit that element circuit is in series, wherein respectively
l ir
ic
ielement circuit, can be by the inductance coil that is contained in a high pressure resistant impact in this insulated enclosure sleeve pipe, and the strong sensor magnet ring of polylith nanometer that interval suit is fixed on this inductance coil outer surface forms, two of two ends strong sensor magnet rings of nanometer in insulated enclosure sleeve pipe, the metal flange that is fixed on two ends of described sleeve pipe with suit is respectively connected, the metal flange at described sleeve pipe two ends is serially connected in the phase line of network transformer departures end three phase transmission line by power line, become that to have equivalent inductance be 100-260 μ Н, equivalent capacity is the high-power low pass filter of 80-200pF.
The principle of the utility model protection substation safety is: this anti-lightning overvoltage isolator, at electrical network is
In system, be to be serially connected in every phase line of substation transformer departures end three phase transmission line, no resistance under normal power frequency operation, under low frequency, impedance is very little moves without impact transformer, but meeting under the induction of 1M-10MHz lightening pulse, can produce up to 2 * 10
3Ω-2 * 10
6the high impedance of Ω, can effectively make lightning overvoltage ripple and the propagation of switching overvoltage ripple that high fdrequency component is abundant be obstructed, form the complicated communication process such as reflection, standing wave, make that over-voltage waveform distorts, broadening, overvoltage wave steepness and amplitude, level and smooth over-voltage waveform have been reduced, realize buffering and isolation that overvoltage is impacted transformer, thunder and lightning is destroyed and be difficult to be diffused into transformer station, improved equivalently the lightning withstand level of transformer station.
This anti-lightning overvoltage isolator, has minimum withstand voltage 450kV, anti-effective amplitude of lightning current 350kA; For the following transformer station of 300MVA, realize high-power overvoltage protection.
Outstanding advantages of the present utility model is:
1. this anti-lightning overvoltage isolator, major function is isolation lightning overvoltage and the impact of switching overvoltage to transformer station's first and second equipment.
2. this anti-lightning overvoltage isolator, can suppress more than 80% high frequency burr, reduces overvoltage steepness more than 40%.
3. this anti-lightning overvoltage isolator, realize non-maintaining, inspection-free survey, life cycle cost is low.
This anti-lightning overvoltage isolator, need be according to electric pressure and transformer station's power capacity customization.
Accompanying drawing explanation
Fig. 1 is the anti-lightning overvoltage isolator of the utility model electrical block diagram
Fig. 2 is the utility model lightning protection voltage isolator vertical profile structural representation face
Fig. 3 is the anti-lightning overvoltage isolator of the utility model installation site schematic diagram
Mark in figure: 1 is the strong sensor magnet of nanometer, and 2 is high pressure resistant kicker coil, 3 is high pressure resistant impact insulated enclosure sleeve pipe, and 4 is metal joint flange, and 5 is power line, and 6 is anti-lightning overvoltage isolator setting position.
Embodiment
Below in conjunction with accompanying drawing and example, the anti-lightning overvoltage isolator of the utility model is described in detail:
As shown in Figure 1, the anti-lightning overvoltage isolator of the utility model, one end connection transformer, other end connecting power line, builds by multi-level unit R at its two ends
1l
1c
1, R
2l
2c
2... R
nl
nc
nbe composed in series that to have equivalent inductance be the high-power low-pass filter circuit that 100-260 μ Н, effective capacitance are 80-200pF.
As shown in Figure 2, anti-lightning overvoltage isolator, include a high pressure resistant impact insulated enclosure sleeve pipe 3, the inductance coil 2 and the interval suit that are contained in a high pressure resistant impact in these sleeve pipe 3 cavitys are fixed on the strong sensor magnet ring 1 of polylith nanometer on these inductance coil 2 outer surfaces, the strong sensor magnet ring of two nanometers of 3 two ends of sleeve pipe, the metal flange 4 that is fixed on 3 two ends of sleeve pipe with suit is respectively connected, and the metal flange 4 at sleeve pipe 3 two ends is hinged with and has power line 5 respectively.
The described strong sensor magnet ring of the nanometer adopting on inductance coil outer surface that is fixed on, is to be made and be take Fe element as main body by nano-powder, and the crystallite state of the 10-20 nm that adulterate a small amount of Ni, Mn, Mg, Nb element form is responded to by force nanometer magnet.
As shown in Figure 3, the anti-lightning overvoltage isolator of the utility model, be mounted on A, B, the C three phase line of the departures of substation transformer three-phase in electrical network end, no resistance under normal 50Hz power frequency, under low frequency, impedance Hen little Dui transformer station is without impact, but when having the overvoltage of 1MHz, 2MHz, 10MHz power frequency, will produce respectively 2 * 10
3Ω, 4 * 10
4Ω, 2 * 10
6the high impedance of Ω, the impact of blocking-up overcurrent, realizes the lightning protection insulation blocking to transformer station.
The utility model overvoltage isolator, can be used for the following transformer station of 300MVA, realizes high-power overvoltage protection.
The anti-lightning overvoltage isolator product of having developed, meets standard GB/T 50169 and power industry standard DL/T620, reaches minimum withstand voltage standard 450kV, the specification requirement of anti-effective amplitude of lightning current 350kA.
Anti-lightning overvoltage isolator has the listed electric parameter of following table:
| Operating frequency (H Z) | 50 | 5k | 1M | 2M | 10M |
| Impedance is not less than (Ω) | - | 10 | 2×10 3 | 4×10 4 | 2×10 6 |
Claims (2)
1. an anti-lightning overvoltage isolator, is characterized in that: include one and be enclosed in high pressure resistant impact insulated enclosure sleeve pipe (3), by multistage L
ir
ic
ithe LRC circuit that element circuit is in series, wherein respectively
l ir
ic
ielement circuit, can form by being contained in the inductance coil (2) of a high pressure resistant impact in this insulated enclosure sleeve pipe (3) and the strong sensor magnet ring of polylith nanometer (1) that interval suit be fixed on this inductance coil (2) outer surface, the strong sensor magnet ring of two nanometers of interior two ends of insulated enclosure sleeve pipe (3) (
1), respectively with suit be fixed on sleeve pipe (
3) two ends metal flange (
4) be connected, sleeve pipe (
3) two ends metal flange (
4) pass through power line
(5) be serially connected in the phase line of network transformer departures end three phase transmission line, become that to have equivalent inductance be the high-power low pass filter that 100-260 μ Н, equivalent capacity are 80-200pF, its minimum withstand voltage for 450kV, anti-effective amplitude of lightning current be 350kA.
2. according to anti-lightning overvoltage isolator claimed in claim 1, it is characterized in that: there is following electric parameter: at normal 50 H
zunder power frequency, having impedance is 0; At 5kH
zunder power frequency, impedance is not less than 10 Ω; In frequency, be 1M H
ztime its impedance be not less than 2 * 10
3Ω; Frequency is 2M H
ztime impedance be not less than 4 * 10
4Ω; When frequency is 10M, its impedance is not less than 2 * 10
6Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601662.5U CN203445611U (en) | 2013-09-28 | 2013-09-28 | Lightning protection over-voltage isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601662.5U CN203445611U (en) | 2013-09-28 | 2013-09-28 | Lightning protection over-voltage isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445611U true CN203445611U (en) | 2014-02-19 |
Family
ID=50096629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320601662.5U Expired - Fee Related CN203445611U (en) | 2013-09-28 | 2013-09-28 | Lightning protection over-voltage isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203445611U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474313A (en) * | 2019-08-21 | 2019-11-19 | 李宝华 | A kind of lightning protection device that high-tension transformer isolation is combined with filtering |
| CN111239472A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Overvoltage monitoring sensor |
-
2013
- 2013-09-28 CN CN201320601662.5U patent/CN203445611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474313A (en) * | 2019-08-21 | 2019-11-19 | 李宝华 | A kind of lightning protection device that high-tension transformer isolation is combined with filtering |
| CN111239472A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Overvoltage monitoring sensor |
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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 |
Granted publication date: 20140219 Termination date: 20190928 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |