CN209994107U - Dynamic insulation matched boosting ionization device - Google Patents
Dynamic insulation matched boosting ionization device Download PDFInfo
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- CN209994107U CN209994107U CN201920936248.7U CN201920936248U CN209994107U CN 209994107 U CN209994107 U CN 209994107U CN 201920936248 U CN201920936248 U CN 201920936248U CN 209994107 U CN209994107 U CN 209994107U
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Abstract
The utility model discloses a dynamic insulation complex ionization device that steps up belongs to the ionization technical field that steps up, including closed loop magnetic core, two coils, two transformers and two preionization electrodes, two coils twine respectively in the both sides of closed loop magnetic core, and the coil of step up transformer 3 is around the different or coil 2 on the closed loop magnetic core 1 opposite direction that encircle, and two transformer 3's output all is connected with the output of two coils, and two preionization electrodes are connected with the output of two transformers respectively, and two preionization electrodes are alternate to be set up. The utility model discloses can change fixed insulating match ratio, ensure not to reduce the dielectric strength and the resistant thunder level of original circuit when normal during operation. When there is thunder, increase clearance free electron through ionization discharge, reduce the dielectric strength in clearance, make the discharge voltage in clearance be less than the discharge voltage of insulator (cluster), the clearance breaks down discharge preferentially, ensures that flashover time is in advance and the electric arc route is in the arc extinguishing passageway, has solved the difficult problem that the place flashover outside the arc extinguishing passageway leads to the arc extinguishing inefficacy.
Description
Technical Field
The utility model relates to an ionization technical field that steps up especially relates to an ionization device that steps up of dynamic insulation complex.
Background
Lightning strike can bring different forms of damage and destruction to electric power facilities, and thundercloud discharge can cause lightning strike overvoltage in an electric power system, and the lightning strike overvoltage is divided into direct lightning strike overvoltage and induced lightning strike overvoltage. Lightning overvoltage can damage insulators and power transmission lines; the line insulator flashover is caused by impact flashover caused by lightning strike on the transmission line, and then large power frequency follow current is generated to damage the insulator string and hardware fittings, so that line accidents are caused; lightning strikes on a power transmission line or a lightning conductor can cause strand breakage and even breakage, so that power transmission work cannot be carried out.
The existing lightning protection system of the overhead power transmission and distribution line is mainly in a blocking type lightning protection mode, and mainly takes the measures of erecting a lightning conductor and a coupling ground wire, reducing tower grounding resistance, enhancing line insulation, installing a line arrester and the like, and mainly aims at limiting lightning overvoltage and reducing lightning trip. However, because the blocking type lightning protection mode is limited by the effectiveness, the safety and the economy, only single weak lightning stroke can be protected, and a huge blank exists for protecting huge lightning stroke and multiple lightning stroke, so that the lightning stroke trip-out rate is always kept high.
The existing 'dredging type' lightning protection mode is used as the supplement of the 'blocking type' lightning protection mode, and is mainly characterized in that parallel connection protection gaps are installed at two ends of an insulator (string), the structure is simple, the installation is convenient, but short-circuit current continuously flows into a system due to the fact that an arc extinguishing function module is not arranged, the short-circuit current can only be cut off by a breaker, the 'tripping rate is converted into the accident rate', the lightning trip rate is improved to a certain extent, and huge safety accidents of a circuit are easily caused. Meanwhile, due to the ablation effect of the short-circuit current, the parallel protection gap insulation matching fails, and the application function is lost.
Based on the 'blocking type' and 'leading type' lightning protection mode principles, an active arc extinguishing type parallel connection gap is developed on the basis of a parallel connection protection gap, and the active arc extinguishing type parallel connection gap is installed at two ends of an insulator (string) in parallel through a fixed hardware fitting. When the thunder and lightning overvoltage waves come, the breakdown voltage of the parallel gap is lower than that of the insulator (string), the insulator is preferentially broken down, an impact flashover channel is formed, and meanwhile, the thunder and lightning impact pulse is used for triggering the active arc extinguishing device to act to generate high-speed high-voltage arc extinguishing gas to act on the arc establishing channel, so that the effects of cutting off electric arcs and restraining subsequent power frequency follow current are achieved.
However, the electric field of the active arc extinguishing parallel gap is mostly a very uneven electric field, and the volt-second characteristic is very steep, so that the electric field is difficult to be well matched with the volt-second characteristic of protected insulation. In the fixed insulation fit, if the fixed insulation fit ratio is further reduced, namely the distance of the parallel gap is shortened, the static breakdown voltage of the parallel gap is set to be too low, so that the active arc-extinguishing device frequently acts under the internal overvoltage, even under the working overvoltage. Consequently to fixed insulation complex problem, the utility model discloses on the basis of the parallelly connected clearance of initiative arc extinguishing formula, increase an ionization device, realize dynamic insulation cooperation, ensure when thunderbolt, will flashover the channel control at parallelly connected clearance (arc extinguishing passageway promptly), protection insulator (cluster) thunderbolt is insulating not flashover, but is unlikely to make the clearance puncture under power frequency overvoltage and operation overvoltage, causes the malfunction. The problem that an invalid area exists in insulation matching caused by volt-second characteristic protrusions is solved.
The ionization device can expand the protection range. Even if the lightning stroke point is in the center of the span, the ionization discharge control gap is in flashover preferentially, the zero potential of the pole tower is sent to the center of the span in advance, so that the conducting wire is grounded during lightning stroke and forms complete negative reflection to generate shielding failure potential clamping, and interphase equipotential is caused by early discharge and is conducted to the lightning stroke point, and interphase flashover is eliminated. When the central lightning conductor of the span is struck by lightning, the ionization discharge can lead the conductor to be grounded in advance, the counterattack overvoltage reaching the tower is released, the improvement of the potential of the lightning stroke point is inhibited, the transverse flashover is blocked, and the insulation matching range is expanded to the full span from the insulator.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dynamic insulation complex ionization device that steps up to the technical problem who mentions in the solution background art.
The utility model provides a developments insulation complex ionization device that steps up, including closed loop magnetic core, two coils, two transformers and two preionization electrodes, two coils twine respectively in the both sides of closed loop magnetic core, the coil winding opposite direction that coils on the coil winding opposite or closed loop magnetic core of two transformers encircle is opposite, the output of two transformers 3 all is connected with the output of two coils, two preionization electrodes are connected with the output of two transformers respectively, two preionization electrodes set up alternately.
Further, a closed-loop magnetic core wound with a coil is provided on the wire, the lightning conductor or the cross arm.
Further, two preionization electrodes are arranged on two opposite sides inside an arc extinguishing cylinder nozzle of the external solid-phase arc extinguishing device.
Furthermore, two boost ionization devices are respectively arranged at two ends of the insulator, one boost ionization device is arranged on the lightning protection wire, and the other boost ionization device is arranged on the conducting wire.
Further, the boost ionization device is placed on a lightning conductor or a conducting wire.
The utility model adopts the above technical scheme, the utility model discloses following technological effect has:
(1) the utility model discloses can change fixed insulating match ratio, ensure not to reduce the dielectric strength and the resistant thunder level of original circuit when normal during operation. When there is thunder, increase clearance free electron through ionization discharge, reduce the dielectric strength in clearance, make the discharge voltage in clearance be less than the discharge voltage of insulator (cluster), the clearance is the breakdown discharge preferentially, ensures that flashover time is in advance and the electric arc route is in the arc extinguishing passageway, makes the arc extinguishing more have initiative and controllability, has solved the difficult problem that the place flashover outside the arc extinguishing passageway leads to the arc extinguishing to become invalid.
(2) The utility model discloses the ionization produces free electron for the clearance punctures and does not rely on the influence of lightning current steepness and amplitude, and the volt-second characteristic is more gentle, thereby makes invasion thunder and lightning wave amplitude and steepness obtain reducing in the clearance action back circuit, ensures thunderbolt protection safety such as power plant and transformer substation.
Drawings
Fig. 1 is a structural diagram of the induction boosting ionization device of the method of the present invention.
Fig. 2 is a schematic diagram of an application of the ionization device of the method of the present invention.
Fig. 3 is a schematic view of another application of the ionization device of the method of the present invention.
In the figure: 1-a closed-loop magnetic core; 2-a coil; 3-a transformer; 4-arc striking rod; 5-an arc extinguishing unit; 6-arc extinguishing rotating disc; 7-arc extinguishing cylinder; 8-a high voltage electrode; 9-preionization electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and by referring to preferred embodiments. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
The embodiments of the invention are further explained in accordance with the above-described principle description and with reference to fig. 1-3:
the utility model provides a developments insulation complex ionization device that steps up, as shown in fig. 1-3, including closed loop magnetic core 1, two coils 2, two transformers 3 and two preionization electrodes 9, two coils 2 twine respectively in the both sides of closed loop magnetic core 1, the coil winding method of two transformers 3 is different or the coil 2 on the closed loop magnetic core 1 encircles opposite direction, the output of two transformers 3 all is connected with the output of two coils 2, two preionization electrodes 9 are connected with the output of two transformers respectively, two preionization electrodes 9 alternate the setting.
The closed-loop magnetic core 1 wound with the coil is arranged on a lead wire, a lightning conductor or a cross arm. Two pre-ionization electrodes 9 are arranged on two opposite sides inside the arc extinguishing cylinder nozzle of the external solid-phase arc extinguishing device. The two boosting ionization devices are respectively arranged at two ends of the insulator, one boosting ionization device is arranged on the lightning protection wire, and the other boosting ionization device is arranged on the conducting wire. The boosting ionization device can be independently placed on the lightning conductor or the conducting wire, and can also be placed at the same time.
When lightning stroke is carried out on the center of a span or a lightning conductor, lightning stroke overvoltage is transmitted from a lightning stroke point to towers at two ends, when the lightning stroke overvoltage flows through the closed-loop magnetic core 1, magnetic flux passing through the closed-loop magnetic core 1 changes, induced current is induced by an induced coil 2 on the closed-loop magnetic core 1 according to the electromagnetic induction principle to generate induced electromotive force, meanwhile, leads at two sides are respectively connected with a step-up transformer 3, the induced electromotive force is boosted through the step-up transformer 3, and the polarities of two preionization electrodes 9 of output voltage are different due to different coil winding methods of the step-up transformer 3 or opposite surrounding directions of the coil 2 on the closed-. When the induced electromotive force of the coil 2 is boosted by the transformer 3, the potential difference between the two preionization electrodes 9 is increased, once the plasma channel is short-circuited with the two electrodes, ionization discharge occurs, the free electron concentration is greatly improved, the insulation matching ratio is changed, the insulation strength of the parallel gap is reduced, the lightning stroke overvoltage is released in the parallel gap in a flashover mode, and the preferential discharge channel is formed.
The utility model discloses can be applied to ionization electrode 9 in advance in the parallelly connected clearance of solid phase arc extinguishing arrester, the closed loop magnetic core 1 cover that encircles coil 2 is on the lightning conductor, and is connected with the wire with the inside step up transformer 3 of arranging solid phase arc extinguishing device in, and the ground connection pin connects ionization electrode 9 in advance, and on the cross arm promptly, the device produces a large amount of positive charges and the negative charge induction of thundercloud lower part in thunderbolt ionization earlier stage, forms the streamer, and then becomes the thunder and lightning passageway.
The utility model discloses can be applied to the high tension electrode in the parallelly connected clearance of solid phase arc extinguishing arrester, surround 1 covers of closed loop magnetic core of coil 2 on the wire, with arrange the 3 wires of step up transformer on the high tension electrode 8 in and be connected, the ground connection pin connects at preionization electrode, on the cross arm promptly, the device produces the negative charge response of a large amount of positive charges and thundercloud lower part in thunderbolt ionization earlier stage, forms the streamer, and then becomes the thunder and lightning passageway.
The utility model discloses can be applied to the parallelly connected clearance of solid phase arc extinguishing arrester with two sets of ionization devices simultaneously, wherein 1 covers of closed loop magnetic core of a set of induction coil 2 is on the overhead ground wire, and is connected with the inside step up transformer 3 wires of arranging solid phase arc extinguishing device in, and 1 covers of closed loop magnetic core of another group induction coil 2 is on the wire, is connected with the step up transformer 3 wires of arranging high-tension electrode in, and the ground connection pin connects in advance ionization electrode 9, on the cross arm promptly.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a dynamic insulation complex ionization device that steps up which characterized in that: including closed loop magnetic core (1), two coils (2), two transformers (3) and two preionization electrodes (9), two coils (2) twine respectively in the both sides of closed loop magnetic core (1), the coil winding method of two transformers (3) is opposite or coil (2) on closed loop magnetic core (1) encircle opposite direction, the output of two transformers (3) all is connected with the output of two coils (2), two preionization electrodes (9) are connected with the output of two transformers respectively, two preionization electrodes (9) alternate the setting.
2. A dynamic isolation fit boost ionization device as claimed in claim 1, wherein: the closed-loop magnetic core (1) wound with the coil is arranged on a lead, a lightning conductor or a cross arm.
3. A dynamic isolation fit boost ionization device as claimed in claim 1, wherein: two pre-ionization electrodes (9) are arranged on two opposite sides inside an arc extinguishing cylinder nozzle of an external solid-phase arc extinguishing device.
4. A dynamic isolation fit boost ionization device as claimed in claim 1, wherein: the two boosting ionization devices are respectively arranged at two ends of the insulator, one boosting ionization device is arranged on the lightning protection wire, and the other boosting ionization device is arranged on the conducting wire.
5. A dynamic isolation fit boost ionization device as claimed in claim 1, wherein: the boost ionization device is placed on a lightning conductor or a conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936248.7U CN209994107U (en) | 2019-06-20 | 2019-06-20 | Dynamic insulation matched boosting ionization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936248.7U CN209994107U (en) | 2019-06-20 | 2019-06-20 | Dynamic insulation matched boosting ionization device |
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| CN209994107U true CN209994107U (en) | 2020-01-24 |
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| CN201920936248.7U Active CN209994107U (en) | 2019-06-20 | 2019-06-20 | Dynamic insulation matched boosting ionization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736647A (en) * | 2020-12-24 | 2021-04-30 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
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2019
- 2019-06-20 CN CN201920936248.7U patent/CN209994107U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736647A (en) * | 2020-12-24 | 2021-04-30 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
| CN112736647B (en) * | 2020-12-24 | 2023-02-28 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
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