CN108879628A - A kind of distribution transformer lightning protection mode of connection based on inductance filter - Google Patents
A kind of distribution transformer lightning protection mode of connection based on inductance filter Download PDFInfo
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- CN108879628A CN108879628A CN201810663198.XA CN201810663198A CN108879628A CN 108879628 A CN108879628 A CN 108879628A CN 201810663198 A CN201810663198 A CN 201810663198A CN 108879628 A CN108879628 A CN 108879628A
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- arrester
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- 230000004224 protection Effects 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 230000007935 neutral effect Effects 0.000 claims abstract description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 18
- 229960001296 zinc oxide Drugs 0.000 claims description 9
- 239000011787 zinc oxide Substances 0.000 claims description 9
- 238000004880 explosion Methods 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 2
- 208000025274 Lightning injury Diseases 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/021—Current limitation using saturable reactors
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a kind of distribution transformer lightning protection mode of connection based on inductance filter, is related to anti-thunder technical field.The distribution transformer lightning protection mode of connection based on inductance filter, including distribution transformer high-pressure side arrester, distribution transformer low-pressure side arrester and inductance filter, one end of inductance filter is connect with the neutral point of distribution transformer low-pressure side, the other end is connect with distribution transformer metal shell, the impedance of inductance filter increases as the frequency for flowing through inductance filter electric current increases, it is in high-impedance state in lightning current effect, can effectively obstruct lightning stroke distribution transformer in the case of thunder and lightning flow through distribution transformer earthing net enter ground when, counterattack pours in the lightning current of distribution transformer low-pressure side neutral point, the impedance very little in power current effect simultaneously, working earthing and protective grounding to guarantee distribution transformer neutral point is normal.
Description
Technical field
The invention belongs to anti-thunder technical field more particularly to a kind of distribution transformer lightning protections based on inductance filter
Mode of connection.
Background technique
10kV distribution transformer is directly facing customer power supply in the power system, once damage, will result directly in user's confession
Electricity interrupts.Distribution network line distribution is wide, equipment is more, and most of distribution line does not set up lightning conducter based on overhead transmission line, by
Lightning strike probability is larger, especially distribution transformer, if thunder And Lightning Preventive Measures are inadequate or unreasonable, along lightning surge meeting
Road invades distribution transformer, generates positive and negative transformation overvoltage, causes transformer major insulation or turn-to-turn insulation to puncture and damage, influences
Power supply reliability.
China's 10kV distribution transformer mostly uses Y, Yn martingale.GB/T 50064-2014《The mistake of alternating-current electric device
Voltage protection and Insulation Coordination design specification》Middle regulation, distribution transformer high-pressure side should install arrester, low pressure close to transformer
One group of arrester is preferably installed in side, and arrester ground line should connect together ground connection with transformer metal shell.
Even if being respectively arranged with arrester in distribution transformer high and low pressure side, and guarantee arrester ground line and transformer metal
Shell connects together ground connection, cannot still entirely prevent positive and negative transformation overvoltage.When lightning stroke distribution transformer, lightning arrestor movement,
Thunder and lightning flows through transformer grounding net and enters ground, increases grounded screen current potential greatly, generates overvoltage and through in step down side
Property line propagates at step down side neutral point, and then acts on low-voltage coil and low-voltage circuit.Low-voltage coil wave impedance
Much larger than low-voltage circuit, it will lead to voltage drop and concentrate on low-voltage coil substantially, even if step down side arrester is dynamic at this time
Make, residual voltage of arrester also will be present on low-voltage coil, and high pressure lateral coil is reached by electromagnetic induction, so that high-pressure side neutral point
Overvoltage is generated between shell, and it is impaired to may cause transformer.Through simulation calculation, when distribution transformer high-pressure side invades thunder and lightning
When stream amplitude reaches 20kA, even if low-pressure side arrester action message, the excessively electric of 98kV will be generated at the neutral point of high-pressure side
Pressure is more than its tolerance range that insulate.Meanwhile the overvoltage of step down side will reach in low-pressure side user, to user with
Come dangerous.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of distribution transformer lightning protection based on inductance filter and connects
Line method.
The present invention is to solve above-mentioned technical problem by the following technical solutions：A kind of matching based on inductance filter
Piezoelectric transformer lightning protection mode of connection, including high-pressure side arrester, low-pressure side arrester and inductance filter；The wiring
Method is：
High-pressure side arrester include 3 phases, the high-voltage end of 3 phase high-pressure side arresters be respectively connected to distribution transformer high-pressure side A phase,
B phase and C phase；
Low-pressure side arrester include 3 phases, the high-voltage end of 3 phase low-pressure side arresters be respectively connected to distribution transformer low-pressure side A phase,
B phase and C phase；
One end of the inductance filter is connected to the neutral point of distribution transformer low-pressure side；
The other end of the low-pressure end of 3 phase high-pressure side arrester, the low-pressure end of 3 phase low-pressure side arresters and inductance filter
It is connected to distribution transformer metal shell, the distribution transformer metal shell is connected to distribution transformer earthing net.
Further, a kind of distribution transformer lightning protection dress based on inductance filter based on above-mentioned mode of connection
It sets, including high-pressure side arrester, low-pressure side arrester and inductance filter；
High-pressure side arrester include 3 phases, the high-voltage end of 3 phase high-pressure side arresters respectively with distribution transformer high-pressure side A phase, B phase
And C is connected；
Low-pressure side arrester include 3 phases, the high-voltage end of 3 phase low-pressure side arresters respectively with distribution transformer low-pressure side A phase, B phase
And C is connected；
The high-voltage end of the inductance filter is connect with the neutral point of distribution transformer low-pressure side；
The other end of the low-pressure end of 3 phase high-pressure side arrester, the low-pressure end of 3 phase low-pressure side arresters and inductance filter
It is connect with distribution transformer metal shell, the distribution transformer metal shell is connect with distribution transformer earthing net.
Further, the high-pressure side arrester uses drop type Zinc-Oxide Arrester, and the drop type zinc oxide is lightning-arrest
Device includes porcelain vase, columnar lighting arrester ontology, upper conducting connecting part, lower conducting connecting part and heat-explosion type disconnector；
The upper end of the porcelain vase is connect with one end of the upper conducting connecting part, and the lower end of porcelain vase and the heat-explosion type disconnector connect
It connects；The heat-explosion type disconnector is also connected with one end of the lower conducting connecting part, the other end of lower conducting connecting part and institute
State the lower end connection of columnar lighting arrester ontology；It is equipped with moving contact in the upper end of the columnar lighting arrester ontology, the moving contact is logical
Operation ring is crossed to connect with the other end of the upper conducting connecting part.
The arrester of the structure, which can exempt to operate a switch, carries out livewire work, improves to operate a switch and block present in making process now
As convenient for closing a floodgate, current-carrying part electric conductivity is more excellent, improves the security reliability of product quality and power distribution network.
Further, the high-pressure side arrester selects the composite sheath metal zinc oxide of model YH5WS-17/50 to keep away
Thunder device, the arrester is molded using whole silicon rubber mould, and good seal performance, explosion-proof performance is excellent, and resistance to filth is free of cleaning, and energy
Greasy weather wet shwoot life is reduced, electrical erosion resistance is anti-aging, small in volume, impact resistant, is easily installed and safeguards.
Further, the low-pressure side arrester selects the metal zinc oxide lightning arrester of model Y1.5WS-0.28/1.3,
Which employs the zinc oxide resistance sheets that nonlinear wind vibration is very excellent, have good steep wave response characteristic, to steep wave electricity
For pressure without delaying, residual voltage is low, without discharge dispersity, overcomes intrinsic steep because caused by delaying steep wave electric discharge of traditional lightning protection device
The high disadvantage of wave discharge voltage.
Compared with prior art, the distribution transformer lightning protection wiring side provided by the present invention based on inductance filter
Method, including distribution transformer high-pressure side arrester, distribution transformer low-pressure side arrester and inductance filter, inductance filter
One end connect with the neutral point of distribution transformer low-pressure side, the other end is connect with distribution transformer metal shell, inductor filter
The impedance of device increases as the frequency for flowing through inductance filter electric current increases, and is in high-impedance state in lightning current effect, can have
When thunder and lightning flows through distribution transformer earthing net and enters ground in the case of effect barrier lightning stroke distribution transformer, to pour in distribution transformer low for counterattack
The lightning current of side neutral point, while the impedance very little in power current effect are pressed, to guarantee the work of distribution transformer neutral point
Ground connection and protective grounding are normal；
The positive and negative transformation overvoltage that mode of connection of the present invention effectively prevent lightning stroke distribution transformer to generate, is effectively reduced distribution
The lightning fault rate of transformer, and can prevent back overrating voltage from reaching in low-pressure side user；Simultaneously as inductance filter energy
It is enough effectively prevent counterattack lightning overvoltage damage distribution transformer, therefore distribution transformer lightning protection can be reduced to platform area Grounding
The requirement of resistance value reduces the input cost of ground mat construction.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of distribution transformer lightning protection wiring schematic diagram based on inductance filter of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without creative labor,
It shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of distribution transformer lightning protection wiring side based on inductance filter provided by the present invention
Method, including high-pressure side arrester, low-pressure side arrester and inductance filter L；Mode of connection is：
High-pressure side arrester includes 3 phases, and 3 phase high-pressure side arresters are respectively A1, B1 and C1；3 phase high-pressure side arrester A1,
The high-voltage end of B1, C1 are respectively connected to distribution transformer high-pressure side A phase, B phase and C phase；
Low-pressure side arrester includes 3 phases, and 3 phase low-pressure side arresters are respectively a1, b1 and c1；3 phase low-pressure side arrester a1,
The high-voltage end of b1, c1 are respectively connected to distribution transformer low-pressure side A phase, B phase and C phase；
One end of inductance filter L is connected to the neutral point of distribution transformer low-pressure side；
The low-pressure end of 3 phase high-pressure side arrester A1, B1, C1, the low-pressure end of 3 phase low-pressure side arrester a1, b1, c1 and inductance filter
The other end of wave device L is connected to distribution transformer metal shell, and distribution transformer metal shell is connected to distribution transformer earthing
Net G.
A kind of distribution transformer lightning protection device based on inductance filter based on above-mentioned mode of connection, including high pressure
Side arrester, low-pressure side arrester and inductance filter；
High-pressure side arrester includes 3 phases, and 3 phase high-pressure side arresters are respectively A1, B1 and C1；3 phase high-pressure side arrester A1,
The high-voltage end of B1, C1 are connected with distribution transformer high-pressure side A phase, B phase and C respectively；
Low-pressure side arrester includes 3 phases, and 3 phase low-pressure side arresters are respectively a1, b1 and c1；3 phase low-pressure side arrester a1,
The high-voltage end of b1, c1 are connected with distribution transformer low-pressure side A phase, B phase and C respectively；
One end of inductance filter L is connect with the neutral point of distribution transformer low-pressure side；
The low-pressure end of 3 phase high-pressure side arrester A1, B1, C1, the low-pressure end of 3 phase low-pressure side arrester a1, b1, c1 and inductance filter
The other end of wave device L is connect with distribution transformer metal shell, and distribution transformer metal shell and distribution transformer earthing net G connect
It connects.
According to the study found that thunder and lightning stream energy is concentrated mainly on high frequency, wherein the energy of 1KHz or more frequency band accounts for 76%, and
Near power frequency（0~100Hz）Energy only account for 2.3%.In the embodiment of the present invention, the impedance of inductance filter L is electric with its is flowed through
The frequency of stream increases and increases, and is in high-impedance state when lightning current acts on, can reach several K Ω to number in 1KHz or more frequency band resistance
Ten K Ω, when can effectively obstruct thunder and lightning in the case of lightning stroke distribution transformer and flowing through distribution transformer earthing net and enter ground, counterattack pours in and matches
The lightning current of piezoelectric transformer low-pressure side neutral point, while the impedance very little in power current effect, only tens of Ω, to guarantee to match
The working earthing and protective grounding of piezoelectric transformer neutral point are normal.
When lightning stroke distribution transformer, distribution transformer high-pressure side arrester A1, B1, C1 and low-pressure side arrester a1, b1, c1
The voltage between transformer high-voltage winding, outlet wire of low voltage winding side and shell can be effectively clamped down on, inductance filter L can will be grounded
The back overrating voltage that net G is poured in is isolated with distribution transformer low-pressure side neutral point, effectively inhibits the overvoltage of transformer neutral point,
Thus distribution transformer can be effectively prevent by broken by lightning.Simultaneously because inductance filter L can effectively prevent counterattack thunder mistake
Voltage damages distribution transformer, therefore can reduce requirement of the distribution transformer lightning protection to platform area grounded screen G grounding resistance, reduces
The input cost of grounded screen G construction.
Above disclosed is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (5)
1. a kind of distribution transformer lightning protection mode of connection based on inductance filter, which is characterized in that kept away including high-pressure side
Thunder device, low-pressure side arrester and inductance filter；The mode of connection is：
High-pressure side arrester include 3 phases, the high-voltage end of 3 phase high-pressure side arresters be respectively connected to distribution transformer high-pressure side A phase,
B phase and C phase；
Low-pressure side arrester include 3 phases, the high-voltage end of 3 phase low-pressure side arresters be respectively connected to distribution transformer low-pressure side A phase,
B phase and C phase；
One end of the inductance filter is connected to the neutral point of distribution transformer low-pressure side；
The other end of the low-pressure end of 3 phase high-pressure side arrester, the low-pressure end of 3 phase low-pressure side arresters and inductance filter
It is connected to distribution transformer metal shell, the distribution transformer metal shell is connected to distribution transformer earthing net.
2. a kind of distribution transformer lightning protection device based on inductance filter of mode of connection as described in claim 1,
It is characterized in that, including high-pressure side arrester, low-pressure side arrester and inductance filter；
High-pressure side arrester include 3 phases, the high-voltage end of 3 phase high-pressure side arresters respectively with distribution transformer high-pressure side A phase, B phase
And C is connected；
Low-pressure side arrester include 3 phases, the high-voltage end of 3 phase low-pressure side arresters respectively with distribution transformer low-pressure side A phase, B phase
And C is connected；
One end of the inductance filter is connect with the neutral point of distribution transformer low-pressure side；
The other end of the low-pressure end of 3 phase high-pressure side arrester, the low-pressure end of 3 phase low-pressure side arresters and inductance filter
It is connect with distribution transformer metal shell, the distribution transformer metal shell is connect with distribution transformer earthing net.
3. a kind of distribution transformer lightning protection device based on inductance filter as claimed in claim 2, which is characterized in that
The high-pressure side arrester uses drop type Zinc-Oxide Arrester, and the drop type Zinc-Oxide Arrester includes that porcelain vase, column are kept away
Thunder device ontology, upper conducting connecting part, lower conducting connecting part and heat-explosion type disconnector；
The upper end of the porcelain vase is connect with one end of the upper conducting connecting part, and the lower end of porcelain vase and the heat-explosion type disconnector connect
It connects；The heat-explosion type disconnector is also connected with one end of the lower conducting connecting part, the other end of lower conducting connecting part and institute
State the lower end connection of columnar lighting arrester ontology；It is equipped with moving contact in the upper end of the columnar lighting arrester ontology, the moving contact is logical
Operation ring is crossed to connect with the other end of the upper conducting connecting part.
4. a kind of distribution transformer lightning protection device based on inductance filter as claimed in claim 2 or claim 3, feature exist
In the high-pressure side arrester selects the composite sheath metal zinc oxide lightning arrester of model YH5WS-17/50.
5. a kind of distribution transformer lightning protection device based on inductance filter as claimed in claim 2, which is characterized in that
The low-pressure side arrester selects the metal zinc oxide lightning arrester of model Y1.5WS-0.28/1.3.
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|---|---|---|---|
| CN201810663198.XA CN108879628A (en) | 2018-06-25 | 2018-06-25 | A kind of distribution transformer lightning protection mode of connection based on inductance filter |
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| CN201810663198.XA CN108879628A (en) | 2018-06-25 | 2018-06-25 | A kind of distribution transformer lightning protection mode of connection based on inductance filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137907A (en) * | 2019-05-29 | 2019-08-16 | 广西电网有限责任公司电力科学研究院 | A kind of inhibition over-voltage protector suitable for 10kV distribution transformer |
| 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 |
| CN111009885A (en) * | 2019-10-16 | 2020-04-14 | 广西大学 | Method for preventing lightning counterattack of power distribution cabinet |
| CN112287519A (en) * | 2020-10-09 | 2021-01-29 | 南方电网科学研究院有限责任公司 | Lightning stroke simulation model of three-phase transformer and construction method |
| CN113158952A (en) * | 2021-04-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for extracting steep wave characteristics of flexible direct current transformer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137907A (en) * | 2019-05-29 | 2019-08-16 | 广西电网有限责任公司电力科学研究院 | A kind of inhibition over-voltage protector suitable for 10kV distribution transformer |
| 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 |
| CN111009885A (en) * | 2019-10-16 | 2020-04-14 | 广西大学 | Method for preventing lightning counterattack of power distribution cabinet |
| CN111009885B (en) * | 2019-10-16 | 2022-04-01 | 广西大学 | Method for preventing lightning counterattack of power distribution cabinet |
| CN112287519A (en) * | 2020-10-09 | 2021-01-29 | 南方电网科学研究院有限责任公司 | Lightning stroke simulation model of three-phase transformer and construction method |
| CN112287519B (en) * | 2020-10-09 | 2024-03-22 | 南方电网科学研究院有限责任公司 | Lightning stroke simulation model of three-phase transformer and construction method |
| CN113158952A (en) * | 2021-04-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for extracting steep wave characteristics of flexible direct current transformer |
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Application publication date: 20181123 |
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