CN105790202A - Overvoltage protector used for power transmission tower - Google Patents
Overvoltage protector used for power transmission tower Download PDFInfo
- Publication number
- CN105790202A CN105790202A CN201610289134.9A CN201610289134A CN105790202A CN 105790202 A CN105790202 A CN 105790202A CN 201610289134 A CN201610289134 A CN 201610289134A CN 105790202 A CN105790202 A CN 105790202A
- Authority
- CN
- China
- Prior art keywords
- electrode
- air
- dust
- side lever
- overvoltage protector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/60—Detecting; Measuring; Sensing; Testing; Simulating
Landscapes
- Electrostatic Separation (AREA)
Abstract
The invention relates to an overvoltage protector used for a power transmission tower. The overvoltage protector comprises a lightning arrester, an electrode group and a support. The electrode group comprises a V-shaped first electrode and a V-shaped second electrode. The lower connecting terminal of the lightning arrester is used for grounding and connected with the lower pin of an organic composite insulator through the support. The first side rod of the first electrode is connected with the upper cap of the organic composite insulator. The first side rod of the second electrode is connected with the upper connecting terminal of the lightning arrester. The first electrode and the second electrode are separated. The maximum spacing distance and the minimum spacing distance between the second side rod of the first electrode and the second side rod of the second electrode are 80-84mm and 16-20mm respectively. According to the overvoltage protector used for the power transmission tower, an insulating lead in a power grid can be protected, and the insulating lead can be effectively prevented from being broken by lightning stroke. Meanwhile, dust cleaning system is additionally arranged so that reliability and maintenance cost of a lightning arrester detection system can be effectively improved.
Description
Technical field
The invention belongs to electric wire lightning-protecting engineering field, particularly to a kind of overvoltage protector for transmission tower.
Background technology
In recent years, in order to reduce the overhead distribution fault that the external causes such as trees, bird pest and sleet cause, improve power supply reliability, reduce line corridor, a large amount of insulated conductors in electric distribution network overhead wire both domestic and external, but the problem that suspended insulated guide wire breaks because of thunderbolt is very prominent, and increases along with insulated conductor line length and steeply rise, it has also become the subject matter of serious threat distribution network line safe operation.The reason of insulated conductor breakage caused by lightning stroke: suspended insulated guide wire voltage in lightning stroke process causes flashover, the electric current of moment electric arc is very big but the time is very short.Blow hole can be formed on suspended insulated guide wire insulating barrier, wire will not be blown, but, this lightning surge causes flashover, the particularly flashover between biphase or three-phase (being not necessarily on same bar, tower), metallic short circuit passage can be formed, cause kilo-ampere power frequency continued flow, arc energy is by abruptly increase, now, owing to suspended insulated guide wire insulating barrier hinders electric arc at its surface sliding, the tension force of wire in addition, high temperature arc root is fixed on the breakdown point of insulating barrier thus blowing wire before breaker actuation.Therefore lightning-caused breaking problem how is properly settled, it is ensured that the safe operation of power distribution network has become as a major issue very in the urgent need to address.
In addition, the existing technical scheme being solved lightning-caused breaking problem by spark gap in prior art, and for detection spark gap is convenient, arrester checks system is often set, and above-mentioned spark gap of the prior art service life is not high, it is bad to keep away lightning-strike effectiveness, and arrester checks system is owing to being chronically exposed to open air, a large amount of dust and dirt is often have accumulated, thus causing detection system job insecurity inside electronic installation.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of overvoltage protector for transmission tower, it is possible to the insulated conductor in electrical network is protected, effectively prevent insulated conductor to be struck by lightning disconnected.And by setting can self-cleaning arrester checks system, be automatically performed the cleaning of the detection internal dust stratification of system electronic device, it is to avoid the unstable situation of detection system occurs.
nullThe invention provides a kind of overvoltage protector for transmission tower，Described transmission tower includes the organic composite insulator for fixed insulation wire，Described overvoltage protector includes spark gap、Electrode group and support，Described electrode group includes being rendered as the first electrode of V-shaped and being rendered as the second electrode of V-shaped，Wherein，The lower terminals of described spark gap are used for ground connection，And be connected with the leftover bits and pieces of described organic composite insulator by described support，First side lever of described first electrode is connected with the upper cap of described organic composite insulator，And described first side lever of the second electrode is connected with the upper terminals of described spark gap，Described first electrode and the second electrode are separated at intervals，Ultimate range between second side lever and second side lever of the second electrode of described first electrode is 80～84mm，Minimum spacing between second side lever and second side lever of the second electrode of described first electrode is 16～20mm.
Described overvoltage protector ensure that insulated conductor is not connected with the first electrode when normal transmission; gap between first electrode and the second electrode can ensure that spark gap does not carry power frequency operation voltage when insulated conductor normal transmission simultaneously; so can be prevented effectively from the problem of aging that spark gap occurs at During Process of Long-term Operation, thus the service life of spark gap is significantly increased.When insulated conductor is struck by lightning, voltage on insulated conductor increases sharply, puncture the insulation sheath adjacent with the first electrode of insulated conductor, insulated conductor and the first electrode is forced to be connected, the high pressure on insulated conductor is made to be applied between the first electrode and the second electrode, and promote between the first electrode and the second electrode breakdown, thus the lightning current on insulated conductor is transferred to spark gap, spark gap now presents Low ESR, this lightning current is released into ground, avoid insulated conductor because of power frequency arc electric current long time calcination and break, thus just the insulated conductor in electrical network can be played a protective role, insulated conductor is effectively prevented to be struck by lightning disconnected.Wherein, ultimate range between second side lever and second side lever of the second electrode of the first electrode and minimum spacing respectively 80～84mm and 16～20mm, such setting can ensure that the air between the first electrode and the second electrode is not breakdown when insulated conductor normal transmission, and breakdown after thunderbolt insulated conductor.First electrode of V-shaped and the second electrode are for elongating gradually and eliminating the electric arc between two electrodes, to ensure the safety of each electrode.
Further, described first electrode and the second electrode are positioned at same perpendicular, and the distance between the second side lever of described first electrode and the second side lever of the second electrode is successively decreased successively along direction from top to bottom, angle between first side lever and its second side lever of described first electrode is 60 °, and the angle between the first side lever and its second side lever of described second electrode is 60 °.
Further, described overvoltage protector includes housing, detection system and dust cleaning system.
Described detection system includes: resistance detector, for detecting the resistance of described spark gap；It is located at the PCB in described housing, described PCB is provided with signal amplification circuit, A/D modular converter, logic controller and alarm；Wherein, described resistance detector, signal amplification circuit, A/D modular converter and logic controller are sequentially connected electrically, and described logic controller, when knowing that the resistance of described spark gap is less than setting value, controls alarm alarm.
Logic controller can know the resistance of spark gap by resistance detector, when logic controller knows the resistance of described spark gap less than setting value, logic controller controls alarm alarm, thus reminding the spark gap that people more renew, ensures power grid security to avoid spark gap to fail to.
nullAnd described dust cleaning system includes the first dust stratification detecting device、Second dust stratification detecting device、Exhaust outlet and dust blow device，Described dust blow device includes being swept into device of air，The described air inlet place being swept into device of air arranges defecator，The cleaning pipeline connection of the described component installed surface side being swept into device of air and be arranged at PCB，Described cleaning pipeline is positioned at above described component，And it is provided with self adaptation gas outlet in the position of corresponding heater element，Each described self adaptation gas outlet place arranges multi-disc sector bimetal leaf，Time below deformation temperature，The described multi-disc mutually adjacent composition of sector bimetal leaf is discoid，Thus described self adaptation gas outlet is closed，During higher than deformation temperature, described bimetal leaf bends to described self adaptation gas outlet lateral direction，Described self adaptation gas outlet is opened，And when the temperature of described bimetal leaf is more high，The amplitude that described self adaptation gas outlet is opened is more big；Described first dust stratification detecting device includes the first capacitometer for measuring cell fin capacitance and comparator, described element radiating sheet is made up of multiple fin monomers, electric insulation between multiple fin monomers, electric capacity between fin monomer is detected by described first capacitometer, when comparator judges to measure capacitance less than threshold value electric capacity, start and be swept into device of air, blow out via the self adaptation gas outlet on described cleaning pipeline through filtered air, described component is cleaned；Second dust stratification detecting device described in exhaust outlet includes light-beam generator and at least one mirror surface being arranged in PCB, this light-beam generator is arranged on described enclosure interior sidewall, rectilinear light beam is transmitted into described mirror surface with fixing angle by light-beam generator, after described mirror surface reflects, light beam is projected onto the photosensitive switch being positioned on enclosure interior sidewall, and photosensitive switch remains on after receiving light beam；When the dust stratification on mirror surface reaches predetermined thickness, photosensitive switch sensing is less than reflection light, then photosensitive switch Guan Bi, startup is swept into device of air automatically；When any one startup in this first dust stratification detecting device and the second dust stratification detecting device is swept into device of air, this is swept into device of air and starts, and after the scheduled time, this is swept into device of air and is automatically switched off.
Owing to self adaptation gas outlet being closed when bimetal leaf is in relatively cold state, bend to self adaptation gas outlet lateral direction when bimetal leaf is in relatively Warm status, self adaptation gas outlet is opened, and when the temperature of bimetal leaf is more high time, the amplitude that self adaptation gas outlet is opened is more big；So that the area of each self adaptation gas outlet is different along with the temperature difference of the element below self adaptation gas outlet.Because for the element that temperature is more high, its area of dissipation can be designed to more big, or the surface of radiator portion is more conducive to the exchange of heat, but being exactly more conducive to the structure that heat exchanges also is to cause that air flowing change comparatively acutely or makes air pass through thinner gap, this structure is just more beneficial for generation and the increase of dust stratification, dust accumulated after the identical time is more many, just clears up by more air mass flow when cleaning.
When fin accumulation dust is more time, gap between fin can reduce, and fin is made as a whole electric capacity and can be diminished, so when electric capacity is varied down to certain value time, may mean that dust has run up to certain stage, so needing cleaning dust.When PCB and component dust stratification are more time, dust stratification on mirror surface is also more, when dust stratification is more time, dust can produce obvious diffuse-reflectance effect, weaken the direct reflection effect of mirror surface greatly, can cause that photosensitive switch cannot receive the light intensity of sufficient intensity to be triggered.The automatic monitoring for element surface dust stratification degree is also achieved, thus improving that element surface dust stratification is more significantly and the short circuit that causes or heat radiation is smooth and the element burnout problems that causes by another mode.
Further, light-beam generator is laser generator.Laser generator directionality is good, the light after direct reflection will not occur significantly to disperse, but when some surface attachment after dust, particularly dust accumulation more after, it will there is obvious diffuse-reflectance.Thus when improve dust and free from dust or time dust is many and dust is few, the discrimination of the light intensity that photosensitive switch is able to receive that, improve the reliability for light-intensity test, reduce the probability of error starting.
Further, light-beam generator includes LED and concave mirror, and light is projected on concave mirror by LED, and by sending directional light after concave mirror.LED, as a kind of widely used light source, is reflected by concave mirror, still can obtain the good directional light of quality.
Further, fin monomer is arranged on an insulating thermal conductor, and between each fin monomer, the bearing of trend along diffusion sheet is split.Insulating thermal conductor can be attachment insulating barrier on metal material, when significantly reducing heat conductivility so that each fin monomer mutually insulated, so that constituting electric capacity between each monomer of fin.By making each fin split along bearing of trend, can independently constitute electric capacity between each fin monomer, it is simple to wiring.
Further, fin monomer is arranged on an insulating thermal conductor, along circular dividing between each fin monomer.Insulating thermal conductor can be attachment insulating barrier on metal material, when significantly reducing heat conductivility so that each fin monomer mutually insulated, so that constituting electric capacity between each monomer of fin.
Further, the quantity at the bimetal leaf at each self adaptation gas outlet place is 3-10 sheet.Bimetal leaf includes active layers and passive layer, and active layers is manganin manganin alloy, and the material of passive layer is mainly dilval.Quantity at the fan-shaped bimetal leaf at each described self adaptation gas outlet place is 3-10 sheet, and described bimetal leaf includes active layers and passive layer, and described active layers is manganin manganin alloy, and passive layer is dilval.When the quantity of bimetal leaf is 3 time, can form a bad angle by each bimetal leaf so that this sheet metal can have a tip that can open, and in time being heated, tip levers up, and can form the air channel of self adaptation air outlet.When the quantity of bimetal leaf is 10 time, lateral restriction tension force in each bimetal leaf is less, can so that bimetal leaf form bigger flexural deformation, the quantity of sheet metal is abundant, it is not necessary to be further added by the quantity of sheet metal to reduce the reliability of system.Bimetal leaf adopts monel as active layers, and its deformation quantity is relatively big, thus obtaining obvious opening effect.
Further, described exhaust outlet arrange on the housing farthest away from the described position being swept into device of air.It is swept into device of air highest distance position place, it is possible to discharged by whole self adaptation gas outlets dust of cleaning of blowing, it is to avoid the dust after cleaning is fallen on component once more by the distance being arranged on housing by exhaust outlet.
Further, described threshold value is 0.9 times of fin reference capacitance value, when this reference capacitance value is fin non-accumulation dust, and the capacitance between two fin monomers.When 0.9 times that capacitance is reference capacitance value time, the dust on electric elements is more, if cleared up not in time, it will cause that element radiating is not smooth, thus reducing the serviceability of detecting device.
Accompanying drawing explanation
Based on embodiment reference accompanying drawing, the present invention will be described in more detail hereinafter.Wherein:
Fig. 1 shows the overvoltage protector for transmission tower of the embodiment of the present invention one；
Fig. 2 is detection system and the dust cleaning system of the overvoltage protector for transmission tower of the embodiment of the present invention two；
Fig. 3 is the detection system circuit diagram of the overvoltage protector for transmission tower of the embodiment of the present invention two；
Fig. 4 is the partial view to self adaptation gas outlet in embodiment two；
Fig. 5 is the partial view of the element radiating sheet in embodiment two；
Fig. 6 is the partial top view of the element radiating sheet in embodiment three；And
Fig. 7 is the structural representation of embodiment four.
Parts identical in the accompanying drawings use identical accompanying drawing labelling.Accompanying drawing might not be drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of technical solution of the present invention is described in detail.Following example are only for clearly illustrating therefore to be only used as technical scheme example, and can not limit the scope of the invention with this.
Embodiment one
Fig. 1 shows the overvoltage protector for transmission tower of the embodiment of the present invention.Wherein, transmission tower be broadly interpreted be include electric pole or shaft tower etc. establish in ground and device for transmitting electricity.This overvoltage protector includes organic composite insulator 105, spark gap 103, electrode group and support 104.Organic composite insulator 105 is for supporting the insulated conductor 200 of transmission line of electricity, described electrode group includes the first electrode 101 being rendered as V-shaped and the second electrode 102 being rendered as V-shaped, first electrode 101 has the first side lever and together forms the second side lever of V-shaped with the first side lever, and same second electrode 102 has the first side lever and together forms the second side lever of V-shaped with the first side lever.Wherein, first side lever of the first electrode 101 is connected with the upper cap 105a (also known as chapeau de fer) of described organic composite insulator 105, first side lever of the second electrode 102 is connected with the upper terminals 103a of described spark gap 103, and first electrode 101 and the second electrode 102 be separated at intervals, to form the air gap between, the lower terminals 103b of described spark gap 103 is used for ground connection, and is connected with the leftover bits and pieces 105b (also known as steel foot) of described organic composite insulator 105 by support 104.In electrode group, the material of the first electrode 101 and the second electrode 102 is all chosen as conducting metal, but is preferably copper and aluminum and alloy etc. thereof, in order to it has high conductivity, high intensity, the advantage such as ageing-resistant.
Further, the first side lever of the first electrode 101 is connected with the upper cap 105a of organic composite insulator 105 preferably by pipe clamp, naturally it is also possible to adopt the modes such as welding, bolt.First side lever of described second electrode 102 is connected with the upper terminals 103a of described spark gap 103 by bolt, in like manner can also adopt the connected modes such as welding or riveted joint.
The support 104 of the present invention includes the conduction bent plate that the ground connection cross-arm with described transmission tower is connected.But a part for conduction bent plate cross-arm.Cross-arm is ingredient important in shaft tower, and it is used to install the electric power tools such as insulator, to support wire, lightning conducter, and so as to keeps certain safe distance by regulation.Angle steel is one of the material making cross-arm, selects angle steel to make the bearing capacity of cross-arm structure higher, is not easy corrosion simultaneously.Wherein, this organic composite insulator 105, for fixed insulation wire 200, adopts organic combined insulated material to make insulator, have that volume is little, weight, be easy to safeguard, install, the advantage such as mechanical degrees is high, not broken, anti-seismic performance is excellent, anti-pollution characteristic is good.
This organic composite insulator 105 upper end arranges fixing device, and fixing device is for being fixed on organic composite insulator 105 by insulated conductor 200.This fixing device can adopt binding apparatus, clamping and sleeve etc., but preferably employs the mode that aluminum steel is tied up, and aluminum steel ductility is prone to tie up well, and resistance to expose to wind and rain and be unlikely to be lighted by high temperature or melted when thunderbolt.Organic composite insulator 105 can tolerate the high temperature of 200 °, and ageing-resistant performance is good, and anti-flammability height V-0 level, tearing strength 15kN/m, service life is up to 1000h.
Overvoltage protector provided by the invention ensure that insulated conductor 200 is not connected with the first electrode 101 when normal transmission; gap between first electrode 101 and the second electrode 102 can ensure that spark gap 103 does not carry power frequency operation voltage when insulated conductor 200 normal transmission simultaneously; so can be prevented effectively from the problem of aging that spark gap 103 occurs at During Process of Long-term Operation, thus the service life of spark gap 103 is significantly increased.When insulated conductor 200 is struck by lightning, voltage on insulated conductor 200 increases sharply, puncture the insulation sheath adjacent with the first electrode 101 of insulated conductor 200, insulated conductor 200 and the first electrode 101 is forced to be connected, the high pressure on insulated conductor 200 is made to be applied between the first electrode 101 and the second electrode 102, and promote between the first electrode 101 and the second electrode 102 breakdown, thus the lightning current on insulated conductor 200 is transferred to spark gap 103, spark gap 103 now presents Low ESR, this lightning current is released into ground, avoid insulated conductor 200 because of power frequency arc electric current long time calcination and break, thus just the insulated conductor 200 in electrical network can be played a protective role.Wherein, ultimate range L1 between second side lever and second side lever of the second electrode 102 of the first electrode 102 is 80～84mm, minimum spacing L2 between second side lever and second side lever of the second electrode 102 of the first electrode 102 is 16～20mm, such setting can ensure that the air between the first electrode and the second electrode is not breakdown when insulated conductor 200 normal transmission, and breakdown after thunderbolt insulated conductor 200.First electrode 101 of V-shaped and the second electrode 102 are for elongating gradually and eliminating the electric arc between two electrodes, to ensure the safety of each electrode.
Owing to being provided with the air gap between the first electrode 101 and the second electrode 102, working voltage is carried on the air gap at ordinary times, therefore working voltage can apply for a long time and not puncture, namely spark gap 103 does not carry power frequency operation voltage under normal circumstances, spark gap 103 is absent from running problem of aging, can life-time service, even if simultaneously causing spark gap 103 to puncture for a certain reason or short circuit, without causing transmission line wire to be directly grounded, and it is properly functioning to affect circuit.When the gap of electrode group is by sleet and foreign object short circuit, spark gap about 103 two ends are loaded the high voltage of transmission line of electricity, but now spark gap is in high impedance status, the existence of spark gap 103 makes transmission line of electricity can meet its long-term charging operation, thus realizing dual fail-safe.Owing to the lightning impulse volt-second characteristic curve of spark gap 103 is lower by more than 15% than protected line insulator lightning impulse volt-second characteristic curve.When insulated conductor 200 is struck by lightning; there is lightning surge in transmission line of electricity; the insulating barrier of insulated conductor 200 breaks; voltage-drop loading on wire is between electrode group; meanwhile under the lightning surge effect that direct lightning strike or induced lightening produce, the air gap elder generation disruptive discharge between the first electrode 101 of overvoltage protector of the present invention and the second electrode 102, owing to the instantaneous voltage of thunderbolt is significantly high; spark gap 103 presents Low ESR, is released by lightning current into ground；Non-linear impedance characteristic due to spark gap 103 excellence, the pressure drop (being called residual voltage) produced on spark gap 103 will be limited, spark gap 103 residual voltage is lower than 50% discharge voltage of organic composite insulator 105, even if lightning current has bigger increase, the residual voltage of spark gap 103 only has increased slightly, and electric discharge flashover still will not occur insulator 1.After lightning current; the power frequency arc electric current (being called power frequency continued flow) produced due to line system voltage in gap will flow through spark gap 103; again due to the excellent nonlinear characteristic of Zinc-Oxide Arrester 103; it is now in high impedance status; the power frequency continued flow flowing through spark gap 103 is only milliampere level, and the insulated conductor 200 in electrical network is played the effect of being effectively protected.
In order to improve the effect of arc extinguishing, first electrode 101 and the second electrode 102 are positioned at same perpendicular, distance between second side lever and second side lever of the second electrode 102 of the first electrode 101 is successively decreased successively along direction from top to bottom, angle between first side lever and its second side lever of the first electrode 101 is 60 °, and the angle between the first side lever and its second side lever of the second electrode 102 is 60 °.Through lot of experiment validation; angle between first side lever and its second side lever of the first electrode 101 is 60 °; and second electrode 102 the first side lever and its second side lever between angle when being also 60 °; the arc quenching effect of electrode group is best; namely the quenching time is about 100 μ s; release current is up to 85kA, and the release generous wave height of capacity reaches 250A, the facility such as so more effective protection insulated conductor and insulator.
Preferably, the top of the second side lever of described first electrode 101 is most advanced and sophisticated, and the top of the second side lever of described second electrode 102 also be most advanced and sophisticated, thunderbolt voltage height to a certain extent time, electric arc elongates eletrode tip and is more beneficial for gathering the release of electromotive force.
Preferably, spark gap 103 is preferably Zinc-Oxide Arrester, (namely less than predetermined pressure sensitive voltage), varistor value is very big under normal running voltage for zinc oxide material, be equivalent to state of insulation, but under Impulse Voltage (pressure sensitive voltage more than predetermined), varistor is that low value is breakdown, is equivalent to short-circuit condition.But after varistor hit, state of insulation can be recovered；After cancelling higher than the voltage of pressure sensitive voltage, it has recovered again high-impedance state.Therefore, after Zinc-Oxide Arrester installed by electric lines of force, when thunderbolt; the transient high voltage that thunderbolt produces makes varistor puncture; lightning current flows into the earth by varistor, it is possible to by the Control of Voltage on power line in safety range, thus protecting the safety of electrical equipment.Compared with common spark gap, Zinc-Oxide Arrester has the plurality of advantages such as capacity is big, through-flow soon, volume is little, performance is strong.The lower terminals 103b of spark gap 103 is earth terminal, for being discharged by high-tension current when spark gap 103 is breakdown.
It is highly preferred that spark gap is organic combined insulated coat lightning arrester, it is possible to spark gap 103 is played a very good protection, shockproof, not easily collided with.
It is highly preferred that the spark gap 103 of the present invention and organic composite insulator 105 all adopt 4 umbrella-shaped structures, 4 umbrella-shaped structures can increase spark gap and organic composite insulator surface creepage distance, and then improves their class of insulation.
Embodiment two:
Fig. 2 is detection system and the dust cleaning system of the overvoltage protector for transmission tower of the embodiment of the present invention two；Fig. 3 is the detection system circuit diagram of the overvoltage protector for transmission tower of the embodiment of the present invention two；Fig. 4 is the partial view to self adaptation gas outlet in embodiment two；Fig. 5 is the partial view of the element radiating sheet in embodiment two；In figure, the implication that each accompanying drawing labelling represents is as follows；1, housing；2, PCB；11, it is swept into device of air；12, defecator；13, pipeline is cleaned；14, self adaptation gas outlet；15, bimetal leaf；16, fin monomer；17, mirror surface；18, photosensitive switch；19, component；20, exhaust outlet；23, insulating thermal conductor；24, laser generator.Embodiment two adds detection system and dust cleaning system exactly on the basis of embodiment one.
Spark gap leaks for a long time cruelly in the external world, is corroded and affects with dust etc., and self-resistance will be affected, and cannot ensure this problem of power grid security after losing efficacy in order to avoid spark gap, and overvoltage protector includes housing and detection system.Detection system includes resistance detector.Resistance detector is for detecting the resistance of spark gap.Detection system also includes the PCB 2 being arranged in housing 1, is provided with signal amplification circuit, A/D modular converter, logic controller and alarm in PCB 2.Resistance detector, signal amplification circuit, A/D modular converter and logic controller are sequentially connected electrically, and logic controller (is typically chosen as 10 at the resistance knowing spark gap less than setting value3M Ω) time, control alarm alarm.The power supply wherein detecting system can be solar panel, wind-driven generator or accumulator.
Logic controller can know the resistance of spark gap by resistance detector, when logic controller knows the resistance of described spark gap less than setting value, logic controller controls alarm alarm, thus reminding the spark gap that people more renew, ensures power grid security to avoid spark gap to fail to.
nullOvervoltage protector also includes dust cleaning system，Dust cleaning system includes the first dust stratification detecting device、Second dust stratification detecting device and dust blow device，Dust blow device includes being swept into device of air 11，In the present embodiment，Being swept into device of air can be supply fan or inlet air compressor，The air inlet place being swept into device of air 11 arranges defecator 12，The cleaning pipeline 13 of the component 19 installed surface side being swept into device of air 11 and be arranged at PCB 2 connects，Clean on pipeline 13 and to be also arranged over multiple self adaptation gas outlet 14 at multiple components 19，Each self adaptation gas outlet 14 place arranges multi-disc bimetal leaf 15，Self adaptation gas outlet 14 is closed by the bimetal leaf 15 at each self adaptation gas outlet 14 place when bimetal leaf 15 is in relatively cold state，Bend to self adaptation gas outlet 14 lateral direction when bimetal leaf 15 is in relatively Warm status，Self adaptation gas outlet 14 is opened，And when the temperature of bimetal leaf 15 is more high time，The amplitude that self adaptation gas outlet 14 is opened is more big；
First dust stratification detecting device includes the first capacitometer for measuring cell fin, element radiating sheet is made up of multiple fin monomers 16, electric insulation between multiple fin monomers 16, first capacitometer is connected with comparator and surveys capacitance to comparator feedback, comparator is also connected with memorizer, Memory Reference capacitance in memorizer, reference capacitance value is the capacitance when element radiating sheet non-accumulation dust between multiple fin monomers 16, when surveying capacitance beyond the threshold value set so that reference capacitance value is as the criterion, it is swept into device of air 11 to start, blow out via the self adaptation gas outlet 14 cleaned on pipeline 13 through filtered air, component 19 is cleaned, dirty air is discharged in housing 11 through exhaust outlet 20.
Second dust stratification detecting device light-beam generator and at least one be arranged between the component 19 in PCB 2 mirror surface 17 of position, it is internal that light-beam generator is arranged on housing 1, rectilinear light beam is transmitted into mirror surface 17 with fixing angle by light-beam generator, after being reflected minute surface 17 reflection, light beam is projected onto on the photosensitive switch 18 being provided with within housing 1, when photosensitive switch 18 senses less than reflection light, automatically start and be swept into device of air 11.
Owing to self adaptation gas outlet 14 being closed when bimetal leaf 15 is in relatively cold state, bend to self adaptation gas outlet 14 lateral direction when bimetal leaf 15 is in relatively Warm status, self adaptation gas outlet 14 is opened, and when the temperature of bimetal leaf 15 is more high time, the amplitude that self adaptation gas outlet 14 is opened is more big；So that the area of each self adaptation gas outlet 14 is different along with the temperature difference of the element below self adaptation gas outlet 14.Because for the element that temperature is more high, its area of dissipation can be designed to more big, or the surface of radiator portion is more conducive to the exchange of heat, but being exactly more conducive to the structure that heat exchanges also is to cause that air flowing change comparatively acutely or makes air pass through thinner gap, this structure is just more beneficial for generation and the increase of dust stratification, dust accumulated after the identical time is more many, just clears up by more air mass flow when cleaning.
When fin accumulation dust is more time, gap between fin can reduce, and fin is made as a whole electric capacity and can be diminished, so when electric capacity is varied down to certain value time, may mean that dust has run up to certain stage, so needing cleaning dust.
When PCB 2 and component 19 dust stratification are more time, dust stratification on mirror surface 17 is also more, when dust stratification is more time, dust can produce obvious diffuse-reflectance effect, weaken the direct reflection effect of mirror surface 17 greatly, can cause that photosensitive switch 18 cannot receive the light intensity of sufficient intensity to be triggered.The automatic monitoring for element surface dust stratification degree is also achieved, thus improving that element surface dust stratification is more significantly and the short circuit that causes or heat radiation is smooth and the element burnout problems that causes by another mode.
By arranging capacitance detecting and light detection two ways, it is possible to backup each other, to guarantee that when dust runs up to certain stage time dust cleaning system can system, the dust of removing element surface covering in time.
Laser generator 24 directionality is good, the light after direct reflection will not occur significantly to disperse, but when some surface attachment after dust, particularly dust accumulation more after, it will there is obvious diffuse-reflectance.Thus when improve dust and free from dust or time dust is many and dust is few, the discrimination of the light intensity that photosensitive switch 18 is able to receive that, improve the reliability for light-intensity test, reduce the probability of error starting.
Particularly, fin monomer 16 is arranged on an insulating thermal conductor 23, and between each fin monomer 16, the bearing of trend along diffusion sheet is split.
Insulating thermal conductor 23 can be attachment insulating barrier on metal material, when significantly reducing heat conductivility so that each fin monomer 16 mutually insulated, so that constituting electric capacity between each monomer of fin.By making each fin split along bearing of trend, can independently constitute electric capacity between each fin monomer 16, it is simple to wiring.
Particularly, the quantity at the bimetal leaf 15 at each self adaptation gas outlet 14 place is 6.Bimetal leaf 15 includes active layers and passive layer, and active layers is manganin manganin alloy, and the material of passive layer is mainly dilval.
When the quantity of bimetal leaf 15 is 6 time, lateral restriction tension force in each bimetal leaf 15 is less, can so that bimetal leaf 15 form bigger flexural deformation, the quantity of sheet metal is abundant, it is not necessary to be further added by the quantity of sheet metal to reduce the reliability of system.
Bimetal leaf 15 adopts monel as active layers, and its deformation quantity is relatively big, thus obtaining obvious opening effect.
Particularly, the lower limit of threshold value is 0.9 times of reference capacitance value.
When 0.9 times that capacitance is reference capacitance value time, the dust on electric elements is more, if cleared up not in time, it will cause that element radiating is not smooth, thus reducing the serviceability of detecting device.
It is as follows that the dust of the present embodiment cleans operating principle:
Time between component or fin, upper dust stratification is more, actual range between fin monomer can decline, the air of the non-conductor as electricity between metal fin, also the space shared by partial air is had replaced by dust, so the electric capacity between fin monomer can decline step by step along with the accumulation of dust.When the low lower limit to threshold value of capacitance, start and be swept into device of air.
Except this detection mode, it is also provided with the mode of light detection, when dust accumulate on mirror surface more in, the reflectance of direct reflection can be reduced, reduce the intensity of illumination that photosensitive switch can receive, photosensitive switch sensing is less than reflection light, then photosensitive switch Guan Bi, startup is swept into device of air automatically.
It is swept into after device of air starts and absorbs filtered cleaned air from the external world, send into and clean in pipeline.Owing to the bimetal leaf at self adaptation gas outlet place is as variations in temperature and progressively changes shape, so self adaptation gas outlet now is opened, and, self adaptation gas outlet above hotter element is opened bigger, self adaptation gas outlet above slightly colder element is opened less, can so that the flow of cleaned air can be different according to the different temperatures of element distribution, to improve the utilization ratio of cleaned air.Can allow be swept into after device of air first blows the very first time and be automatically switched off, for instance the very first time can be half a minute.Then second time that waited allows the ash fall being suspended in enclosure interior space, because while the dust of component surface is blown afloat by giving vent to anger of self adaptation gas outlet, and constantly to enclosure interior space make-up air, from main trend, the air being mixed with dust can be discharged from exhaust outlet, but cannot guarantee that after some time, the air being mixed with dust will all be discharged from enclosure interior space.So after blowing over a period of time, the air of shell intracorporeal space, in fact still for being mixed with the air of a small amount of dust, so needing to wait for a period of time, allow dust in air settle.Such as the second time can be 3 minutes or 2 minutes.After ash fall in housing, then detect electric capacity, if remaining lower than threshold value, then continue to clean, if the need arises then so repeatedly, so that the dust on element and circuit board is cleaned up.
Embodiment three:
Fig. 6 is the structural representation of the fin in the embodiment of the present invention three；In figure, the implication that the accompanying drawing labelling occurred in accompanying drawing used by embodiment two represents continues to use the implication in embodiment two accompanying drawing, and the implication that each accompanying drawing labelling emerging represents is as follows；
The present embodiment and embodiment two are distinctive in that:
Fin monomer 16 is arranged on an insulating thermal conductor 23, along circular dividing between each fin monomer 16.
Insulating thermal conductor 23 can be attachment insulating barrier on metal material, when significantly reducing heat conductivility so that each fin monomer 16 mutually insulated, so that constituting electric capacity between each fin monomer 16 of fin.
Embodiment four:
Fig. 7 is the structural representation of embodiment four.
In figure, the implication that the accompanying drawing labelling occurred in accompanying drawing used by embodiment two represents continues to use the implication in embodiment two accompanying drawing, and the implication that each accompanying drawing labelling emerging represents is as follows: 21, LED；22, concave mirror；
In embodiment two, what light-beam generator adopted is laser generator, in the present embodiment, it is also possible to being set to light-beam generator include LED 21 and concave mirror 22, light is projected on concave mirror 22 by LED 21, and sends directional light after being reflected by concave mirror 22.LED etc. 21, as a kind of widely used light source, are reflected by concave mirror 22, still can obtain the good directional light of quality.
Although the preferred embodiments of the present invention being described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned detailed description of the invention, above-mentioned detailed description of the invention is merely schematic, it is not restrictive, those of ordinary skill in the art is under the enlightenment of the present invention, without departing under present inventive concept and scope of the claimed protection situation, a lot of form can also be made, such as: 1. embodiment 2 is be the annular of L-shaped by a cross section, fix the afterbody of each bimetal leaf, actually bimetal leaf can also be connected with the surface cleaning pipeline by bonding or soldering mode；2. the bimetal leaf at each self adaptation gas outlet place in embodiment 2 is 6,3-10 sheet can essentially be made into, when the quantity of bimetal leaf is 3 time, can can form a bad angle by each bimetal leaf, make this sheet metal can have a tip that can open, in time being heated, tip levers up, and can form the air channel of self adaptation air outlet.When the quantity of bimetal leaf is 10 time, lateral restriction tension force in each bimetal leaf is less, can so that bimetal leaf form bigger flexural deformation, the quantity of sheet metal is abundant, it is not necessary to be further added by the quantity of sheet metal to reduce the reliability of system；3. not conflicting technological means in each embodiment above is mutually combined, constitutes the technical scheme directly not described in detailed description of the invention part.These belong within protection scope of the present invention.
Claims (9)
- null1. the overvoltage protector for transmission tower，Wherein，Described transmission tower includes the organic composite insulator for fixed insulation wire，It is characterized in that，Described overvoltage protector includes spark gap、Electrode group and support，Wherein said electrode group includes being rendered as the first electrode of V-shaped and being rendered as the second electrode of V-shaped，The lower terminals of described spark gap are used for ground connection，And be connected with the leftover bits and pieces of described organic composite insulator by described support，First side lever of described first electrode is connected with the upper cap of described organic composite insulator，And described first side lever of the second electrode is connected with the upper terminals of described spark gap，Described first electrode and the second electrode are separated at intervals，Maximum spacing between second side lever and second side lever of the second electrode of described first electrode and minimum spacing respectively 80～84mm and 16～20mm.
- 2. overvoltage protector according to claim 1; it is characterized in that; described first electrode and the second electrode are positioned at same perpendicular; and the distance between the second side lever of described first electrode and the second side lever of the second electrode is successively decreased successively along direction from top to bottom; angle between first side lever and its second side lever of described first electrode is 60 °, and the angle between the first side lever and its second side lever of described second electrode is 60 °.
- 3. overvoltage protector according to claim 1 or claim 2, it is characterised in that also include housing, detection system and dust cleaning system,Described detection system includes: resistance detector, for detecting the resistance of described spark gap；It is located at the PCB in housing, described PCB is provided with signal amplification circuit, A/D modular converter, logic controller and alarm；Wherein, described resistance detector, signal amplification circuit, A/D modular converter and logic controller are sequentially connected electrically, and described logic controller, when knowing that the resistance of described spark gap is less than setting value, controls alarm alarm；nullDescribed dust cleaning system includes the first dust stratification detecting device、Second dust stratification detecting device、Exhaust outlet and dust blow device，Described dust blow device includes being swept into device of air，The described air inlet place being swept into device of air arranges defecator，The cleaning pipeline connection of the described component installed surface side being swept into device of air and be arranged at PCB，Described cleaning pipeline is positioned at above described component，And it is provided with self adaptation gas outlet in the position of corresponding heater element，Each described self adaptation gas outlet place arranges multi-disc sector bimetal leaf，Time below deformation temperature，The described multi-disc mutually adjacent composition of sector bimetal leaf is discoid，Thus described self adaptation gas outlet is closed，During higher than deformation temperature, described bimetal leaf bends to described self adaptation gas outlet lateral direction，Described self adaptation gas outlet is opened，And when the temperature of described bimetal leaf is more high，The amplitude that described self adaptation gas outlet is opened is more big；Described first dust stratification detecting device includes the first capacitometer for measuring cell fin capacitance and comparator, described element radiating sheet is made up of multiple fin monomers, electric insulation between multiple fin monomers, electric capacity between fin monomer is detected by described first capacitometer, when comparator judges to measure capacitance less than threshold value electric capacity, start and be swept into device of air, blow out via the self adaptation gas outlet on described cleaning pipeline through filtered air, described component is cleaned；Described second dust stratification detecting device includes light-beam generator and at least one mirror surface being arranged in PCB, this light-beam generator is arranged on described enclosure interior sidewall, rectilinear light beam is transmitted into described mirror surface with fixing angle by light-beam generator, after described mirror surface reflects, light beam is projected onto the photosensitive switch being positioned on enclosure interior sidewall, and photosensitive switch remains on after receiving light beam；When the dust stratification on mirror surface reaches predetermined thickness, photosensitive switch sensing is less than reflection light, then photosensitive switch Guan Bi, startup is swept into device of air automatically；When any one startup in this first dust stratification detecting device and the second dust stratification detecting device is swept into device of air, this is swept into device of air and starts, and after the scheduled time, this is swept into device of air and is automatically switched off.
- 4. overvoltage protector according to claim 3, it is characterised in that: described light-beam generator is laser generator.
- 5. overvoltage protector according to claim 3, it is characterised in that: described light-beam generator includes LED and concave mirror, and light is projected on described concave mirror by described LED, and by sending directional light after concave mirror.
- 6. overvoltage protector according to claim 3; it is characterized in that: described fin monomer is arranged on an insulating thermal conductor; between each described fin monomer, the bearing of trend along diffusion sheet is split, or, along circular dividing between each described fin monomer.
- 7. overvoltage protector according to claim 3; it is characterized in that: the quantity at the fan-shaped bimetal leaf at each described self adaptation gas outlet place is 3-10 sheet; described bimetal leaf includes active layers and passive layer, and described active layers is manganin manganin alloy, and passive layer is dilval.
- 8. the overvoltage protector according to claim 3 or 7, it is characterised in that: described exhaust outlet arrange on the housing farthest away from the described position being swept into device of air.
- 9. overvoltage protector according to claim 3, it is characterised in that: described threshold value is 0.9 times of fin reference capacitance value, when this reference capacitance value is fin non-accumulation dust, the capacitance between two fin monomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289134.9A CN105790202A (en) | 2016-05-04 | 2016-05-04 | Overvoltage protector used for power transmission tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289134.9A CN105790202A (en) | 2016-05-04 | 2016-05-04 | Overvoltage protector used for power transmission tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105790202A true CN105790202A (en) | 2016-07-20 |
Family
ID=56400567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610289134.9A Pending CN105790202A (en) | 2016-05-04 | 2016-05-04 | Overvoltage protector used for power transmission tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105790202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106203888A (en) * | 2016-07-27 | 2016-12-07 | 国网重庆市电力公司 | The apparatus and method of power grid regulation intelligent error preventing operation |
| CN108305729A (en) * | 2018-04-03 | 2018-07-20 | 江西爱瑞达电瓷电气有限公司 | A kind of laminated toughened glass insulator and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08251784A (en) * | 1995-03-08 | 1996-09-27 | Ngk Insulators Ltd | Supporting structure for arrester insulator |
| CN203386547U (en) * | 2013-07-29 | 2014-01-08 | 国家电网公司 | Integrated fixed external series gap self-disengaging metal oxide lightning arrester insulators |
| CN103618276A (en) * | 2013-11-17 | 2014-03-05 | 国家电网公司 | Multifunctional connection device of lightning arrester |
| CN104545699A (en) * | 2013-10-21 | 2015-04-29 | Lg电子株式会社 | Robot cleaner and method for sensing dust |
| CN204330623U (en) * | 2014-07-30 | 2015-05-13 | 广东美的制冷设备有限公司 | The dust-full pick-up unit of screen pack of air conditioner and the cleaning systems of air conditioner |
-
2016
- 2016-05-04 CN CN201610289134.9A patent/CN105790202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08251784A (en) * | 1995-03-08 | 1996-09-27 | Ngk Insulators Ltd | Supporting structure for arrester insulator |
| CN203386547U (en) * | 2013-07-29 | 2014-01-08 | 国家电网公司 | Integrated fixed external series gap self-disengaging metal oxide lightning arrester insulators |
| CN104545699A (en) * | 2013-10-21 | 2015-04-29 | Lg电子株式会社 | Robot cleaner and method for sensing dust |
| CN103618276A (en) * | 2013-11-17 | 2014-03-05 | 国家电网公司 | Multifunctional connection device of lightning arrester |
| CN204330623U (en) * | 2014-07-30 | 2015-05-13 | 广东美的制冷设备有限公司 | The dust-full pick-up unit of screen pack of air conditioner and the cleaning systems of air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106203888A (en) * | 2016-07-27 | 2016-12-07 | 国网重庆市电力公司 | The apparatus and method of power grid regulation intelligent error preventing operation |
| CN108305729A (en) * | 2018-04-03 | 2018-07-20 | 江西爱瑞达电瓷电气有限公司 | A kind of laminated toughened glass insulator and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206636708U (en) | A kind of blade lightning protection structures of wind power generating set | |
| WO2014047758A1 (en) | No-freewheeling arc lightning protection gap protecting device | |
| CN108181551A (en) | Transmission line of electricity discharging fault localization method and monitoring device based on electric field mutation | |
| CN208752762U (en) | Electric fire monitoring device | |
| CN206849589U (en) | Insulator lightning protection device and monitoring system | |
| CN102931609B (en) | On-load changes the operational method of 10kV fuse switch | |
| CN105790202A (en) | Overvoltage protector used for power transmission tower | |
| CN110829183A (en) | Lightning arrester for power transmission line | |
| CN209329640U (en) | Lightning protection device | |
| CN109448939A (en) | A kind of tension-resistant rod external series gap metal oxide arrester | |
| CN206421856U (en) | The explosion-proof combined column formula insulator of 10kV indicating fault type lightning protection | |
| CN105788775A (en) | Needle type composite insulator for 10 kV transmission line | |
| CN211480883U (en) | Fixed-gap multi-chamber gap lightning arrester capable of being replaced in electrified mode | |
| CN205943611U (en) | Take pin type composite insulator for 10kV transmission line of voltage -sharing cover | |
| CN112332220A (en) | Built-in series gap lightning arrester of distribution line | |
| JP2004225660A (en) | Thunder-resistant wind power generation system | |
| CN209199696U (en) | A kind of novel metal oxide arrester | |
| CN111786261A (en) | A discharge gap device for circuit lightning protection | |
| CN201247909Y (en) | High-energy non-follow-current air gap module | |
| CN209199703U (en) | A kind of metal oxide arrester | |
| CN205986080U (en) | Circuit flashover protector | |
| CN207442184U (en) | Low residual voltage, deterioration visible fixed external series gap arrester | |
| CN201515199U (en) | Removable and suspensible drop-out type arrester | |
| CN104409969A (en) | Self-arc-quenching parallel gap device | |
| CN109509596A (en) | A kind of metal oxide arrester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |
|
| RJ01 | Rejection of invention patent application after publication |