CN105023668A - Zinc oxide arrester for power plant - Google Patents

Zinc oxide arrester for power plant Download PDF

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Publication number
CN105023668A
CN105023668A CN201510369699.3A CN201510369699A CN105023668A CN 105023668 A CN105023668 A CN 105023668A CN 201510369699 A CN201510369699 A CN 201510369699A CN 105023668 A CN105023668 A CN 105023668A
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CN
China
Prior art keywords
zinc oxide
arrester
electrode
power plant
insulator
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Pending
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CN201510369699.3A
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Chinese (zh)
Inventor
蔡桂钧
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蔡桂钧
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Priority to CN201510369699.3A priority Critical patent/CN105023668A/en
Publication of CN105023668A publication Critical patent/CN105023668A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the field of arrester application, in particular to a zinc oxide arrester for a power plant. The zinc oxide arrester comprises an insulated wire, an insulator, an arrester body and an arrester installation plate, wherein the insulator is fixed on a pole cross arm, the insulated wire is supported by the insulator, a peeled insulation layer wire is arranged on the insulated wire, the arrester body is arranged on the arrester installation plate and comprises a shell, an insulation sleeve, an epoxy tube and an insulation rod, an upper electrode is arranged at the upper end of the epoxy tube, a lower electrode is arranged at the lower end of the epoxy tube, the insulation rod is arranged in the epoxy tube, a plurality of zinc oxide resistor slices are sleeved on the insulation rod and are in parallel to one another, the upper electrode, the plurality of zinc oxide resistor slices and the lower electrode are sequentially and electrically connected via connection pieces, the plurality of resistor slices are pressed and sealed in the insulation sleeve, and a discharging gap is formed between the peeled insulation layer wire and the upper electrode of the arrestor body. The arrester disclosed by the invention has the advantages of high sealing performance, small volume and vibration resistance, and is easy to install.

Description

A kind of power plant zinc oxide arrester
Technical field
The present invention relates to and belong to lightning arrester application, particularly a kind of power plant zinc oxide arrester.
Background technology
Mid-July to mid-August, weather upsurge, was that thunder and lightning concentrates the phase, the threat that the thunder calamity environment structure of depending on for existence to natural resources and the mankind is huge.First thunder and lightning produces scorching hot high temperature, and also have lightning induction in addition, lightning induction comprises electrostatic induction and electromagnetic induction, and it can produce induction high voltage.Thunder and lightning is generally divided into three kinds for the harm of the mankind: direct lightning strike, mine transmitting device and indirect lightning strike.Direct lightning strike refer to thunder and lightning directly hit building, trees, greatly, lightning protection device or human body; Mine transmitting device refers to that thunder and lightning is to overhead transmission line and metal pipe line effect, and lightning wave may invade indoor along these pipelines, jeopardize personal safety or damage equipment; Indirect lightning strike then occurs silently, not easily discovers, and consequence is relatively serious, and direct stroke is different with the object that indirect lightning strike destroys, and direct lightning strike is mainly broken building, power transmission line on discharge path, hits and extremely wounds people and animals etc., induced lightening chief destructive electronic equipment.
China is vast in territory, and part transformer station is distributed in mountain area periphery, and mountain area lightening activity is many, and soil resistivity sudden change amplitude is large, and circuit and electric equipment easily receive thunderbolt.Powerful direct lightning strike electric current from hit logistics enter the earth time, the thermal effect produced, mechanical effect are greatly destructive, insulator string counterattack flashover through the electric discharge of electric power line pole tower guiding line causes the breakback of electric equipment to destroy, the reflection of the voltage of induction lightening in supply line, Capacitance parallel connection, refraction IGRS superpose repeatedly, cause induction overvoltage can reach several ten thousand volts to lie prostrate to hundreds of thousands, particularly below 10KW electric equipment and circuit are threatened destruction.
Occur under the impact that the lock accident that falls generally is struck by lightning at power supply network; mine main exhaust fan will be caused like this to break down; cause stopping accident; effectively can not ensure effective operation of booster; fire damp gathers; gas density transfinites; staff's life is on the hazard; the large-area power-cuts that thunderbolt causes causes the unexpected power-off of main equipment in running; there is disconnected rope in main chippy hoist, tank accident of slipping causes the person and device security hidden danger, and main drainage pipeline holds huge back-pressure and bursts; the reverse High Rotation Speed of motor, damages electrode or water pump.The large-area power-cuts recovery electric power feeding time that thunderbolt causes is long, and especially power supply unit sets off an explosion, and recovery power equipment again plays and returns to normal production, and generally at least needs more than two hour, while affecting underground ventilating, directly affects shaft production.
The existing transformer station's many employings valve type arrester being distributed in mountain area, valve type arrester is that a kind of clearance-type lightning protection device is made up of many gap series.The insulation resistance of clearance-type lightning protection device is comparatively large, and parasitic capacitance is less, and its through-current capacity is greater than zinc oxide, does not have leakage current.But the corresponding time is slow, and it may occur that afterflow is reacted, continuous electricity of having no progeny when being therefore used in the larger alternating current circuit of electric current, should be considered, therefore, the restriction of this device in the onset of lightning protection effect is more, can not play its effect preferably, therefore need replacing valve type arrester badly.
Summary of the invention
The present invention mainly solves the deficiency existing for prior art, provides a kind of power plant zinc oxide arrester.This lightning arrester has easy installation, sealing is strong, volume is little, the advantage of vibration resistance.
For solving the problem, the invention provides a kind of power plant zinc oxide arrester, described lightning arrester comprises insulated conductor, insulator, lightning arrester body and lightning arrester mounting panel composition, described insulator is fixed in pole arm, described insulated conductor is supported by insulator, described insulated conductor has by the insulating barrier wire of glass, described lightning arrester body is arranged on lightning arrester mounting panel
Described lightning arrester body comprises housing, insulating case, epoxy tube, insulating rod, described insulating case is arranged in lightning arrester housing, described epoxy tube is arranged in insulating case, the upper end of described epoxy tube is provided with top electrode, the lower end of described epoxy tube is provided with bottom electrode, described insulating rod is arranged in epoxy tube, described insulating rod is arranged with multiple parallel zinc oxide resistance sheet, separated by insulation spacer between adjacent two zinc oxide resistance sheets, described top electrode, multiple zinc oxide resistance sheet and bottom electrode are conducted electricity in turn by connector and are connected, described multiple resistor disc press seal is in insulating case, discharging gap is formed between the described insulating barrier wire that is stripped and the top electrode of lightning arrester body.
The described very cross bar shape that powers on, described insulator is pillar line insulator.
External series gap is formed between described top electrode and the insulating barrier wire that is stripped.
Four star connections are adopted to connect between ZnO resistors and discharging gap.
Described insulation spacer is set on insulating rod, between two zinc oxide resistance sheets, and is close to described zinc oxide resistance sheet.
Described zinc oxide resistance sheet adopts silastic material and the outer guiding structure of high-tension cable.
Described epoxy tube is epoxy fibreglass stringing.
Described housing is full skirt shape structure.
Described top electrode and bottom electrode are metal electrode.
Due to technique scheme, beneficial effect of the present invention is:
(1) structure of znr and discharging gap series connection is adopted; both are made to protect each other; discharging gap makes the chargeability of znr be zero; the nonlinear characteristic of zinc oxide makes again blow-out immediately after discharging gap action; without afterflow, without cutting ripple, discharging gap no longer bears arc extinguishing task, improves the useful life of product; under switching overvoltage, the life-span of action can reach 1000000 times.
(2) voltge surge coefficient is 1, and under various voltage waveform, place value is all equal, and not by switching overvoltage patterns affect, overvoltage protection value is accurate, protective value is excellent.
(3) adopt four star connections, alternate overvoltage can be reduced greatly, compared with conventional lightning arrester, alternate overvoltage reduces 60% ~ 70%, and the possibility of protection greatly improves.
(4) TBP of silica gel outer and the outer guiding structure of high-tension cable is adopted, except there is the electric property of porcelain insulating overcoat, also there is easy installation, sealing be strong, volume is little, the advantage such as vibration resistance, on the handcart chassis that can be directly installed on switch cubicle or instrument transformer indoor.
(5) environment for use temperature is-40 degrees Celsius ~+60 degrees Celsius, and height above sea level is less than 2000m, and can independently install at any time, convenient, simple and direct.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of lightning arrester body of the present invention.
In accompanying drawing, 1-housing, 2-top electrode, 3-bottom electrode, 4-zinc oxide resistance sheet, 5-insulation spacer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
A kind of power plant zinc oxide arrester, described lightning arrester comprises insulated conductor, insulator, lightning arrester body and lightning arrester mounting panel composition, described insulator is fixed in pole arm, described insulated conductor is supported by insulator, described insulated conductor have by the insulating barrier wire of glass, described lightning arrester body is arranged on lightning arrester mounting panel
See Fig. 1, described lightning arrester body comprises housing 1, insulating case, epoxy tube, insulating rod, described insulating case is arranged in lightning arrester housing 1, described epoxy tube is arranged in insulating case, the upper end of described epoxy tube is provided with top electrode 2, the lower end of described epoxy tube is provided with bottom electrode 3, described insulating rod is arranged in epoxy tube, described insulating rod is arranged with multiple parallel zinc oxide resistance sheet 4, separated by insulation spacer 5 between adjacent two zinc oxide resistance sheets, described top electrode 2, multiple zinc oxide resistance sheet 4 and bottom electrode 3 are conducted electricity in turn by connector and are connected, described multiple resistor disc press seal is in insulating case, discharging gap is formed between the described insulating barrier wire that is stripped and the top electrode of lightning arrester body.
Described top electrode 2 is cross clavate, and described insulator is pillar line insulator.
External series gap is formed between described top electrode and the insulating barrier wire that is stripped.
Four star connections are adopted to connect between ZnO resistors and discharging gap.
Described insulation spacer is set on insulating rod, between two zinc oxide resistance sheets, and is close to described zinc oxide resistance sheet.
Described zinc oxide resistance sheet adopts silastic material and the outer guiding structure of high-tension cable.
Described epoxy tube is epoxy fibreglass stringing.
Described housing is full skirt shape structure.
Described top electrode and bottom electrode are metal electrode.
Due to technique scheme, beneficial effect of the present invention is:
1. adopt the structure of znr and discharging gap series connection; both are made to protect each other; discharging gap makes the chargeability of znr be zero; the nonlinear characteristic of zinc oxide makes again blow-out immediately after discharging gap action; without afterflow, without cutting ripple, discharging gap no longer bears arc extinguishing task, improves the useful life of product; under switching overvoltage, the life-span of action can reach 1000000 times.
2. voltge surge coefficient is 1, and under various voltage waveform, place value is all equal, and not by switching overvoltage patterns affect, overvoltage protection value is accurate, protective value is excellent.
3. adopt four star connections, alternate overvoltage can be reduced greatly, compared with conventional lightning arrester, alternate overvoltage reduces 60% ~ 70%, and the possibility of protection greatly improves.
4. adopt the TBP of the outer guiding structure of silica gel outer and high-tension cable, except there is the electric property of porcelain insulating overcoat, also there is easy installation, sealing is strong, volume is little, the advantage such as vibration resistance, on the handcart chassis that can be directly installed on switch cubicle or instrument transformer indoor.
5. environment for use temperature is-40 degrees Celsius ~+60 degrees Celsius, and height above sea level is less than 2000m, and can independently install at any time, convenient, simple and direct.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.

Claims (9)

1. power plant's zinc oxide arrester, it is characterized in that, described lightning arrester comprises insulated conductor, insulator, lightning arrester body and lightning arrester mounting panel, described insulator is fixed in pole arm, described insulated conductor is supported by insulator, described insulated conductor has by the insulating barrier wire of glass, described lightning arrester body is arranged on lightning arrester mounting panel
Described lightning arrester body comprises housing, insulating case, epoxy tube, insulating rod, described insulating case is arranged in lightning arrester housing, described epoxy tube is arranged in insulating case, the upper end of described epoxy tube is provided with top electrode, the lower end of described epoxy tube is provided with bottom electrode, described insulating rod is arranged in epoxy tube, described insulating rod is arranged with multiple parallel zinc oxide resistance sheet, separated by insulation spacer between adjacent two zinc oxide resistance sheets, described top electrode, multiple zinc oxide resistance sheet and bottom electrode are conducted electricity in turn by connector and are connected, described multiple resistor disc press seal is in insulating case, discharging gap is formed between the described insulating barrier wire that is stripped and the top electrode of lightning arrester body.
2. a kind of power plant according to claim 1 zinc oxide arrester, is characterized in that, described in power on very cross bar shape, described insulator is pillar line insulator.
3. a kind of power plant according to claim 2 zinc oxide arrester, is characterized in that, forms external series gap between described top electrode and the insulating barrier wire that is stripped.
4. a kind of power plant according to claim 3 zinc oxide arrester, is characterized in that, adopts four star connections to connect between ZnO resistors and discharging gap.
5. according to a kind of power plant zinc oxide arrester in claim 1-4 described in any one, it is characterized in that, described insulation spacer is set on insulating rod, between two zinc oxide resistance sheets, and is close to described zinc oxide resistance sheet.
6. a kind of power plant according to claim 5 zinc oxide arrester, is characterized in that, described zinc oxide resistance sheet adopts silastic material and the outer guiding structure of high-tension cable.
7. a kind of power plant according to claim 6 zinc oxide arrester, is characterized in that, described epoxy tube is epoxy fibreglass stringing.
8. a kind of power plant zinc oxide arrester according to claim 6 or 7, is characterized in that, described housing is full skirt shape structure.
9. a kind of power plant according to claim 8 zinc oxide arrester, it is characterized in that, described top electrode and bottom electrode are metal electrode.
CN201510369699.3A 2015-06-29 2015-06-29 Zinc oxide arrester for power plant Pending CN105023668A (en)

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Application Number Priority Date Filing Date Title
CN201510369699.3A CN105023668A (en) 2015-06-29 2015-06-29 Zinc oxide arrester for power plant

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105869802A (en) * 2016-05-31 2016-08-17 上海电瓷厂有限公司 Detachable rotary horizontal all-insulation arrester with disconnector
CN106782959A (en) * 2016-12-14 2017-05-31 国网上海市电力公司 It is a kind of can be used as the insulating barrier of the insulator aerial insulated wire of discharge medium
CN106847449A (en) * 2017-02-20 2017-06-13 辰硕电子(九江)有限公司 A kind of high pressure varistor of long-life high reliability
CN110931231A (en) * 2019-12-06 2020-03-27 山东电工电气集团智能电气有限公司 Lightning protection dry-type transformer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04127071A (en) * 1990-09-19 1992-04-28 Ngk Insulators Ltd Inspection of zinc oxide arrester
JP2002151308A (en) * 2000-11-08 2002-05-24 Furukawa Electric Co Ltd:The Lighting arrester
CN201348907Y (en) * 2009-01-20 2009-11-18 安徽省电力公司巢湖供电公司 Lightning protector of 10kV line
CN203326599U (en) * 2013-07-03 2013-12-04 合肥裕凯电力技术有限公司 High-energy-capacity voltage-limiting device
CN204216538U (en) * 2014-12-01 2015-03-18 刘颂凯 10kV insulated overhead line
CN104599798A (en) * 2014-12-12 2015-05-06 国家电网公司 Direct current lightning arrester and system using the same
CN204333600U (en) * 2015-02-02 2015-05-13 国家电网公司 A kind of lightning protection device of high voltage supply circuit
CN204390818U (en) * 2015-01-19 2015-06-10 青岛万川电力设备有限公司 For the lightning arrester in power plant
CN204424022U (en) * 2015-01-27 2015-06-24 河北安达电气科技有限公司 A kind of external series gap metal zinc oxide lightning arrester

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04127071A (en) * 1990-09-19 1992-04-28 Ngk Insulators Ltd Inspection of zinc oxide arrester
JP2002151308A (en) * 2000-11-08 2002-05-24 Furukawa Electric Co Ltd:The Lighting arrester
CN201348907Y (en) * 2009-01-20 2009-11-18 安徽省电力公司巢湖供电公司 Lightning protector of 10kV line
CN203326599U (en) * 2013-07-03 2013-12-04 合肥裕凯电力技术有限公司 High-energy-capacity voltage-limiting device
CN204216538U (en) * 2014-12-01 2015-03-18 刘颂凯 10kV insulated overhead line
CN104599798A (en) * 2014-12-12 2015-05-06 国家电网公司 Direct current lightning arrester and system using the same
CN204390818U (en) * 2015-01-19 2015-06-10 青岛万川电力设备有限公司 For the lightning arrester in power plant
CN204424022U (en) * 2015-01-27 2015-06-24 河北安达电气科技有限公司 A kind of external series gap metal zinc oxide lightning arrester
CN204333600U (en) * 2015-02-02 2015-05-13 国家电网公司 A kind of lightning protection device of high voltage supply circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105869802A (en) * 2016-05-31 2016-08-17 上海电瓷厂有限公司 Detachable rotary horizontal all-insulation arrester with disconnector
CN105869802B (en) * 2016-05-31 2018-07-06 上海电瓷厂有限公司 A kind of detachable rotary-type pressure-bearing type all insulation arrester of band disconnector
CN106782959A (en) * 2016-12-14 2017-05-31 国网上海市电力公司 It is a kind of can be used as the insulating barrier of the insulator aerial insulated wire of discharge medium
CN106847449A (en) * 2017-02-20 2017-06-13 辰硕电子(九江)有限公司 A kind of high pressure varistor of long-life high reliability
CN110931231A (en) * 2019-12-06 2020-03-27 山东电工电气集团智能电气有限公司 Lightning protection dry-type transformer
CN110931231B (en) * 2019-12-06 2021-05-04 山东电工电气集团智能电气有限公司 Lightning protection dry-type transformer

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Application publication date: 20151104