CN205680926U - A kind of ground electrode circuit condenser type is released can inter space device - Google Patents

A kind of ground electrode circuit condenser type is released can inter space device Download PDF

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Publication number
CN205680926U
CN205680926U CN201620620703.9U CN201620620703U CN205680926U CN 205680926 U CN205680926 U CN 205680926U CN 201620620703 U CN201620620703 U CN 201620620703U CN 205680926 U CN205680926 U CN 205680926U
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China
Prior art keywords
shaft tower
ground electrode
space device
electrode
inter space
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CN201620620703.9U
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Inventor
谢施君
郭蓉萍
李建明
罗涛
刘凡
张榆
周悦
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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Abstract

The utility model discloses a kind of ground electrode circuit condenser type and release energy inter space device, described releasing can include by inter space device: impact capacitor, side of wire electrode, shaft tower lateral electrode, metal link rod, current feed, supports insulative, wherein, supports insulative is arranged on shaft tower, impact capacitor is fixed on supports insulative, metal link rod one end is connected with the high-pressure side of impact capacitor, the other end of metal link rod is connected with shaft tower lateral electrode, current feed one end is connected with the low-pressure end of impact capacitor, the other end of current feed is connected with shaft tower tower body, side of wire electrode is fixed on the lower section of shaft tower insulator chain conductor wire end by gold utensil, achieve and can cannot be easily caused fault while effectively releasing energy, and without the technique effect of periodic maintenance.

Description

A kind of ground electrode circuit condenser type is released can inter space device
Technical field
This utility model relates to power equipment research field, in particular it relates to a kind of ground electrode circuit condenser type is released between energy Gap device.
Background technology
Patent " is exclusively used in the parallel connection gaps (201420733499.2) of 110kV porcelain insulator ", " between a kind of strain insulator-string parallel connection Gap lightning protection device (201520762095.0) ", " adjustable parallel connection gaps (201520834624.3) " all propose be applicable to hand over The conventional parallel gap of stream transmission line of electricity;This parallel connection gaps is made up of two sparking electrodes, and sparking electrode is respectively arranged in insulation The high-pressure side of substring and low-pressure end;After circuit suffers thunderbolt to cause gap flashover and set up electric arc, by making electric arc independently transport Dynamic, allow electric arc extinguish at alternating current near zero-crossing point;When such conventional parallel gap applies to direct current grounding pole circuit, by Arc current after the flashover of gap is DC current, and without zero crossing, therefore electric arc is difficult to independently extinguish, thus forms persistence Fault.
" jet-propelled parallel connection clearance device (201210389771.5) proposes a kind of the active of band air jet system and goes out patent Arc parallel connection gaps;This device adds arc extinguishing powder storeroom, insulation aerogenesis room and spray arc on the basis of conventional parallel gap Passages etc. design;After parallel connection gaps causes flashover because of thunderbolt circuit, air jet system actively ejects high speed arc extinguishing powder, quickly By arc extinction in transient state;This device needs periodically to add, change arc extinguishing powder, and later stage O&M is had higher requirement.
HVDC transmission system is under monopole operating mode or asymmetric operation mode, and ground electrode circuit will be by up to The DC current of kilo-ampere;Under this method of operation, if after ground electrode circuit insulator chain is because of thunderbolt circuit generation flashover, connecing The DC current of earth polar circuit by this flashover passage, via shaft tower enter ground, and insulator chain two ends formed persistence straight Stream electric arc;It is different from alternating current arc, owing to direct-current arc electric current is without zero crossing, it is impossible to independently extinguish, easily causes persistence event Barrier;And the direct-current arc of persistence will burn parallel connection gaps electrode and the insulator chain two ends gold utensil in parallel with shunt electrodes, And then occur ground electrode circuit wire to fall to go here and there fault;In recent years, having there is such fault a lot of in China, causes huge economy Loss;Therefore, the parallel connection gaps of traditional structure and arrangement are not particularly suited for shape high voltage DC earthing pole circuit, and band jet fills The active arc extinguishing parallel connection gaps put then needs periodic maintenance.
In sum, the application utility model people process of utility model technical scheme in realizing the embodiment of the present application In, find that above-mentioned technology at least exists following technical problem:
In the prior art, parallel connection gaps and the arrangement of existing traditional structure is not particularly suited for HVDC ground connection Polar curve road, the active arc extinguishing parallel connection gaps of band air jet system then needs the technical problem of periodic maintenance.
Utility model content
This utility model provides a kind of ground electrode circuit condenser type and releases energy inter space device, solves existing traditional structure Parallel connection gaps and arrangement be not particularly suited for shape high voltage DC earthing pole circuit, and the active arc extinguishing of band air jet system is in parallel Gap then needs the technical problem of periodic maintenance, it is achieved that can cannot be easily caused fault while effectively releasing energy, and without fixed The technique effect that phase safeguards.
For solving above-mentioned technical problem, on the one hand the application provides a kind of ground electrode circuit condenser type and releases and can fill in gap Put, described in release can inter space device include:
Impact capacitor, side of wire electrode, shaft tower lateral electrode, metal link rod, current feed, supports insulative, wherein, Support insulator is arranged on shaft tower, and impact capacitor is fixed on supports insulative, metal link rod one end and impact capacitor High-pressure side connects, and the other end of metal link rod is connected with shaft tower lateral electrode, current feed one end and the low-pressure end impacting capacitor Connecting, the other end of current feed is connected with shaft tower tower body, and side of wire electrode is fixed on shaft tower insulator chain wire by gold utensil The lower section of end.
Wherein, in the application, ground electrode circuit condenser type releases the operation principle of energy inter space device is to refer to Fig. 1, Fig. 1 Energy inter space device circuit theory diagrams, wherein, 1a-insulator chain equivalent gap are released for condenser type;2a-insulator chain equivalent capacity; 3a-parallel connection gaps;4a-parallel connection gaps equivalent capacity;5a-impacts capacitor;6a-cross-arm above tower body equiva lent impedance;7a-cross-arm And part shaft tower tower body equiva lent impedance;Equiva lent impedance bottom 8a-shaft tower;9a-impedance ground;10a-ground electrode circuit wire; 11a-ground electrode circuit ground wire.
Wherein, the gap composition parallel connection gaps between side of wire electrode and shaft tower lateral electrode, insulator chain equivalent gap one Hold tower body equiva lent impedance above with cross-arm to be connected with ground electrode circuit ground wire after being connected, the insulator chain equivalent gap other end with also Connection one end, gap connects, and the parallel connection gaps other end is connected with impact capacitor one end, bottom the impact capacitor other end and shaft tower Equiva lent impedance connects, and ground connection after equiva lent impedance is connected with impedance ground bottom shaft tower, insulator chain equivalent gap two ends are parallel with Insulator chain equivalent capacity, parallel connection gaps two ends are parallel with parallel connection gaps equivalent capacity, cross-arm and part shaft tower tower body equivalence resistance Anti-one end tower body above with cross-arm equiva lent impedance is connected, bottom cross-arm and the part shaft tower tower body equiva lent impedance other end and shaft tower etc. Effect impedance connects, and ground electrode circuit wire is connected between insulator chain equivalent gap and parallel connection gaps.
Wherein, condenser type is released and can the operation principle of inter space device circuit is: be struck by lightning by higher magnitude at ground electrode circuit After, release the parallel connection gaps of energy inter space device prior to insulator chain flashover;The impact capacitor releasing energy inter space device is led to by flashover Road constitutes oscillation circuit with ground electrode circuit, shaft tower impedance, impedance ground so that flashover channel current repeatedly zero passage, promotes to dodge Network electric arc arc extinguishing;Even if flashover arc fails to extinguish in the duration of oscillation, impact capacitor also can block electric arc after oscillatory process Direct current maintain electric current, thus extinguish electric arc.
Wherein, described side of wire electrode is specially circular electrode, provides running path for electric arc root, prevents electric arc root The same position of minister's phase ablation, causes electrode damage.
Wherein, the 75% to 85% of parallel connection gaps a size of insulator chain dry arcing distance, it is ensured that condenser type is released can gap dress Put and prior to insulator chain flashover, and can be mounted with that condenser type is released and can reduce journey by the ground electrode circuit dielectric level after inter space device Spend limited.
Wherein, described shaft tower lateral electrode is specially arc-shaped electrode.Parallel connection gaps electrode use outside arcuate structure, electric arc to Outer motion, beneficially arc extinction.
Wherein, impact capacitor be can the high-voltage capacitor of discharge and recharge in short-term, after parallel connection gaps flashover, its with connect Earth polar circuit, shaft tower impedance, impedance ground constitute oscillation circuit so that flashover channel current repeatedly zero passage, promote flashover arc Arc extinguishing;And the direct current that can block electric arc maintains electric current, thus extinguish electric arc.
The one or more technical schemes provided in the embodiment of the present application, at least have the following technical effect that or advantage:
Ground electrode circuit condenser type is released can be designed as including by inter space device owing to have employed: impact capacitor, side of wire Electrode, shaft tower lateral electrode, metal link rod, current feed, supports insulative, wherein, supports insulative is arranged on shaft tower, impact Capacitor is fixed on supports insulative, and metal link rod one end is connected with the high-pressure side of impact capacitor, another of metal link rod End is connected with shaft tower lateral electrode, and current feed one end is connected with the low-pressure end of impact capacitor, the other end of current feed and bar Tower tower body connects, and side of wire electrode is fixed on the technical scheme of the lower section of shaft tower insulator chain conductor wire end, is i.e. connecing by gold utensil After earth polar circuit suffers higher magnitude thunderbolt, release the parallel connection gaps of energy inter space device prior to insulator chain flashover;Releasing can gap dress The impact capacitor put constitutes oscillation circuit by flashover passage with ground electrode circuit, shaft tower impedance, impedance ground so that flashover Channel current repeatedly zero passage, promotes flashover arc arc extinguishing;Even if flashover arc fails to extinguish in the duration of oscillation, impact capacitor is also The direct current that can block electric arc after oscillatory process maintains electric current, thus extinguishes electric arc, so, efficiently solve existing conventional junction The parallel connection gaps of structure and arrangement are not particularly suited for shape high voltage DC earthing pole circuit, and the active arc extinguishing of band air jet system is also Connection gap then needs the technical problem of periodic maintenance, it is achieved that can cannot be easily caused fault while effectively releasing energy, and without The technique effect of periodic maintenance.
Further, during parallel connection gaps flashover, impact capacitor and lightning channel impedance, ground electrode circuit impedance structure Becoming oscillation circuit, make to form vibration by the electric current in gap, repeatedly zero passage, beneficially flashover arc are extinguished.
Further, after electric arc is set up, parallel connection gaps electrode uses outside arcuate structure, and electric arc moves out, and is beneficial to Arc extinction.
Further, after electric arc is set up, the unidirectional current that the energy of pilot arc burning is mainly flow through by ground electrode circuit Stream provide, due to impact capacitor every straight effect, the electric current in gap in parallel can be reduced rapidly, thus extinguish electric arc.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the one of the application Part, is not intended that the restriction to this utility model embodiment;
Fig. 1 be use after this utility model release can electrical structure principle schematic;
Fig. 2 is the flashover current simulation result schematic diagram using conventional parallel gap;
Fig. 3 is to use the flashover current simulation result schematic diagram releasing energy inter space device of the present utility model;
Fig. 4 is that the electric arc direct current using conventional parallel gap maintains current simulations result schematic diagram;
Fig. 5 is to use the electric arc direct current releasing energy inter space device of the present utility model to maintain the signal of current blocking simulation result Figure;
Fig. 6 is the scheme of installation that condenser type releases energy inter space device;
Wherein, 1a-insulator chain equivalent gap;2a-insulator chain equivalent capacity;3a-parallel connection gaps;4a-parallel connection gaps Equivalent capacity;5a-impacts capacitor;6a-cross-arm above tower body equiva lent impedance;7a-cross-arm and part shaft tower tower body equiva lent impedance; Equiva lent impedance bottom 8a-shaft tower;9a-impedance ground;10a-ground electrode circuit wire;11a-ground electrode circuit ground wire;1-impacts Capacitor;2-side of wire circular electrode;3-shaft tower side arc-shaped electrode;4-metal link rod;5-current feed;6-supports insulative; The original insulator chain of 7-ground electrode circuit;8-ground electrode circuit wire;9-ground electrode circuit shaft tower.
Detailed description of the invention
This utility model provides a kind of ground electrode circuit condenser type and releases energy inter space device, and solving existing releasing can gap There is the parallel connection gaps of traditional structure in device and arrangement is not particularly suited for shape high voltage DC earthing pole circuit, and band air jet system Active arc extinguishing parallel connection gaps then need the technical problem of periodic maintenance, it is achieved that can be not easy to make while effectively releasing energy Become fault, and without the technique effect of periodic maintenance.
In order to be better understood from technique scheme, below in conjunction with Figure of description and specific embodiment to upper State technical scheme to be described in detail.
Below in conjunction with specific embodiment and accompanying drawing, this utility model is made detailed description further, but this practicality is new The embodiment of type is not limited to this.
Embodiment one:
Refer to Fig. 1-Fig. 6, this application provides a kind of capacitive release can inter space device, it is mainly by impact capacitor (equivalent circuit after installation is as shown in Figure 1) in series with parallel connection gaps, including: impact capacitor, side of wire circular electrode, Shaft tower side arc-shaped electrode, metal link rod, current feed.It provides the benefit that:
During parallel connection gaps flashover, impact capacitor and lightning channel impedance, ground electrode circuit impedance are constituted vibrates back Road, makes to form vibration by the electric current in gap, and repeatedly zero passage (Contrast on effect is as shown in Fig. 2-Fig. 3), beneficially flashover arc extinguish;
After electric arc is set up, parallel connection gaps electrode uses outside arcuate structure, and electric arc moves out, beneficially arc extinction;
After electric arc is set up, the DC current that the energy of pilot arc burning is mainly flow through by ground electrode circuit provides, by In impact capacitor every straight effect, the electric current (Contrast on effect is as shown in fig. 4-5) in gap in parallel can be reduced rapidly, Thus extinguish electric arc.
Releasing can inter space device installation method:
Side of wire circular electrode is fixed on the underface of insulator chain conductor wire end by gold utensil;Shaft tower side arc-shaped electrode and punching Hit capacitor to be fixed on shaft tower by supports insulative;By metal link rod and impact capacitor bottom the arc-shaped electrode of shaft tower side High-pressure side connect;The low-pressure end of impact capacitor is connected with tower body by current feed.It provides the benefit that:
Parallel connection gaps conspires to create " series connection " arrangement with insulator, and the arc burning of parallel connection gaps will not Damage to insulation sublist Face, the connection gold utensil that more will not burn insulator chain and shaft tower causes string fault;
Parallel connection gaps can be adjusted to suitable dimension by regulation shaft tower side arc-shaped electrode;
Supports insulative is used to fix shaft tower side arc-shaped electrode and use metal link rod to connect, it is ensured that shaft tower side arc Shape electrode, impact capacitor high-pressure side and the insulation distance of shaft tower.
First size is estimated according to shaft tower tower head structure, insulator chain length, parallel connection gaps, design shaft tower side arc-shaped electrode Position, installs supports insulative of fixing shaft tower side arc-shaped electrode;Side of wire circular electrode is fixed on absolutely by gold utensil The underface of edge substring conductor wire end;Shaft tower side arc-shaped electrode is installed and fine setting guarantees the parallel connection gaps dry arc of a size of insulator chain The 75% ~ 85% of distance;
Shaft tower is installed supports insulative of impact capacitor, and impact capacitor is fixed on supports insulative;
Metal link rod is used to connect impact capacitor high-pressure side and shaft tower side arc-shaped electrode;
Current feed is used to connect impact capacitor low-pressure end and shaft tower tower body.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
Ground electrode circuit condenser type is released can be designed as including by inter space device owing to have employed: impact capacitor, side of wire Electrode, shaft tower lateral electrode, metal link rod, current feed, supports insulative, wherein, supports insulative is arranged on shaft tower, impact Capacitor is fixed on supports insulative, and metal link rod one end is connected with the high-pressure side of impact capacitor, another of metal link rod End is connected with shaft tower lateral electrode, and current feed one end is connected with the low-pressure end of impact capacitor, the other end of current feed and bar Tower tower body connects, and side of wire electrode is fixed on the technical scheme of the lower section of shaft tower insulator chain conductor wire end, is i.e. connecing by gold utensil After earth polar circuit suffers higher magnitude thunderbolt, release the parallel connection gaps of energy inter space device prior to insulator chain flashover;Releasing can gap dress The impact capacitor put constitutes oscillation circuit by flashover passage with ground electrode circuit, shaft tower impedance, impedance ground so that flashover Channel current repeatedly zero passage, promotes flashover arc arc extinguishing;Even if flashover arc fails to extinguish in the duration of oscillation, impact capacitor is also The direct current that can block electric arc after oscillatory process maintains electric current, thus extinguishes electric arc, so, efficiently solve existing releasing between energy There is the parallel connection gaps of traditional structure in gap device and arrangement is not particularly suited for shape high voltage DC earthing pole circuit, and band jet dress The active arc extinguishing parallel connection gaps put then needs the technical problem of periodic maintenance, it is achieved that can be not easy while effectively releasing energy Cause fault, and without the technique effect of periodic maintenance.
Further, during parallel connection gaps flashover, impact capacitor and lightning channel impedance, ground electrode circuit impedance structure Becoming oscillation circuit, make to form vibration by the electric current in gap, repeatedly zero passage, beneficially flashover arc are extinguished.
Further, after electric arc is set up, parallel connection gaps electrode uses outside arcuate structure, and electric arc moves out, and is beneficial to Arc extinction.
Further, after electric arc is set up, the unidirectional current that the energy of pilot arc burning is mainly flow through by ground electrode circuit Stream provide, due to impact capacitor every straight effect, the electric current in gap in parallel can be reduced rapidly, thus extinguish electric arc.
Although having been described for preferred embodiment of the present utility model, but those skilled in the art once knowing substantially Creative concept, then can make other change and amendment to these embodiments.So, claims are intended to be construed to bag Include preferred embodiment and fall into all changes and the amendment of this utility model scope.
Obviously, those skilled in the art can carry out various change and modification without deviating from this practicality to this utility model Novel spirit and scope.So, if of the present utility model these amendment and modification belong to this utility model claim and Within the scope of its equivalent technologies, then this utility model is also intended to comprise these change and modification.

Claims (5)

1. release can inter space device for a ground electrode circuit condenser type, it is characterised in that described in release and can include by inter space device:
Impact capacitor, side of wire electrode, shaft tower lateral electrode, metal link rod, current feed, supports insulative, wherein, support absolutely Edge is arranged on shaft tower, and impact capacitor is fixed on supports insulative, metal link rod one end and the high pressure impacting capacitor End connects, and the other end of metal link rod is connected with shaft tower lateral electrode, and current feed one end is connected with the low-pressure end of impact capacitor, The other end of current feed is connected with shaft tower tower body, and side of wire electrode is fixed on ground electrode circuit shaft tower insulator chain by gold utensil The lower section of conductor wire end.
Ground electrode circuit condenser type the most according to claim 1 releases energy inter space device, it is characterised in that described energy release device Discharge loop is by impacting capacitor and parallel connection gaps is in series.
Ground electrode circuit condenser type the most according to claim 1 releases energy inter space device, it is characterised in that described side of wire electricity Pole is specially circular electrode.
Ground electrode circuit condenser type the most according to claim 1 releases energy inter space device, it is characterised in that parallel connection gaps size For insulator chain dry arcing distance 75% to 85%.
Ground electrode circuit condenser type the most according to claim 1 releases energy inter space device, it is characterised in that described shaft tower side electricity Pole is specially arc-shaped electrode.
CN201620620703.9U 2016-06-22 2016-06-22 A kind of ground electrode circuit condenser type is released can inter space device Active CN205680926U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105932547A (en) * 2016-06-22 2016-09-07 国网四川省电力公司电力科学研究院 Capacitive type energy-releasing gap apparatus for grounding electrode line and mounting method for capacitive type energy-releasing gap apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105932547A (en) * 2016-06-22 2016-09-07 国网四川省电力公司电力科学研究院 Capacitive type energy-releasing gap apparatus for grounding electrode line and mounting method for capacitive type energy-releasing gap apparatus
CN105932547B (en) * 2016-06-22 2017-11-10 国网四川省电力公司电力科学研究院 A kind of ground electrode circuit condenser type is released can inter space device

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