CN112736647B - Clearance forced trigger device and alternating current controllable lightning arrester - Google Patents
Clearance forced trigger device and alternating current controllable lightning arrester Download PDFInfo
- Publication number
- CN112736647B CN112736647B CN202011548505.3A CN202011548505A CN112736647B CN 112736647 B CN112736647 B CN 112736647B CN 202011548505 A CN202011548505 A CN 202011548505A CN 112736647 B CN112736647 B CN 112736647B
- Authority
- CN
- China
- Prior art keywords
- potential end
- trigger coil
- coil
- ground
- ignition
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/16—Series resistor structurally associated with spark gap
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/02—Details
Abstract
The invention provides a gap forced triggering device and an alternating current controllable lightning arrester. The device comprises: the high-potential end trigger coil, the ground-potential end trigger coil, two main electrodes and two ignition electrodes; the ignition device comprises two main electrodes, two ignition electrodes and a control circuit, wherein a main gap is formed between the two main electrodes, the two ignition electrodes correspond to the two main electrodes one to one, and an ignition gap is formed between the ignition electrodes and the corresponding main electrodes; two ends of the high-potential end trigger coil are respectively and electrically connected with one main electrode and the ignition electrode, and two ends of the ground-potential end trigger coil are respectively and electrically connected with the other main electrode and the ignition electrode. The controllable lightning arrester is used as a trigger energy source, and through the high-potential end trigger coil and the ground-potential end trigger coil, when an action current flows through a controlled part, a voltage trigger pulse is generated, an output voltage is led out to an ignition gap, the ignition gap is broken down under the action of the voltage trigger pulse to discharge to generate an initial plasma, and a main gap is broken down and conducted, so that the controlled part is in short circuit.
Description
Technical Field
The invention relates to the technical field of overvoltage protection of power systems, in particular to a gap forced triggering device and an alternating current controllable lightning arrester.
Background
In an ultra-high voltage and extra-high voltage power system, if the overvoltage level can be deeply reduced, the method is very favorable for the insulation matching design of the system and the reduction of the manufacturing difficulty of power transmission and transformation equipment. The controllable lightning arrester technology is a system overvoltage flexible limiting technology adaptive to the change of operating conditions.
Referring to fig. 1, a controllable arrester is composed of a fixed part and a controlled part, and a controllable unit is connected in parallel at the controlled part of the arrester. When the system normally operates, the controllable unit is in a disconnected state, and the arresters of the fixed part and the controlled part are both put into operation; when the overvoltage occurs in the system, the controllable unit is quickly conducted, and the controlled part is in short circuit, so that the volt-ampere characteristic of the lightning arrester is dynamically changed, and the overvoltage of the system is deeply reduced.
At present, a non-closed air gap (hereinafter referred to as a gap) is adopted as a controllable unit, and is an economic and reliable implementation means of a controllable lightning arrester for an alternating current power system. Further, such gaps can be divided into two types: the main technical conditions to be met by the forced triggering type and the self-discharging type are as follows: 1. the system needs to endure normal operation voltage of the system, 2, the system needs to be reliably conducted under overvoltage of the system, and 3, the power frequency follow current electric arc needs to be cut off after the overvoltage is finished. For the self-discharge type gap, the gap adjustment is difficult, and it is very difficult to satisfy the above three technical conditions at the same time. For the forced triggering type, the gap forced discharge is triggered by an external triggering energy source, and the use is inconvenient due to the complexity of an energy supply system.
Disclosure of Invention
In view of this, the invention provides a gap forced triggering device and an alternating current controllable lightning arrester, and aims to solve the problems that a self-discharge type gap is difficult to meet technical conditions, and a forced triggering type gap triggers an energy supply system through an external triggering energy source to be complex.
In one aspect, the present invention provides a gap forcing trigger device, including: the high-potential end trigger coil, the ground-potential end trigger coil, two main electrodes and two ignition electrodes; the high-potential end triggering coil is used for being sleeved at a high-potential end of a controlled part of the alternating current controllable lightning arrester so as to generate a voltage triggering pulse when the alternating current controllable lightning arrester flows through action current; the ground potential end trigger coil is used for being sleeved at the ground potential end of the controlled part of the alternating current controllable lightning arrester so as to generate voltage trigger pulse when the alternating current controllable lightning arrester flows through action current; a main gap is formed between the two main electrodes, the two ignition electrodes are in one-to-one correspondence with the two main electrodes, and an ignition gap is formed between each ignition electrode and the corresponding main electrode; two ends of the high-potential end trigger coil are respectively and electrically connected with one main electrode and the ignition electrode corresponding to the main electrode, two ends of the ground-potential end trigger coil are respectively and electrically connected with the other main electrode and the ignition electrode corresponding to the main electrode, the main electrodes and the ignition electrodes corresponding to the main electrodes break down the ignition gaps to discharge under the action of the voltage trigger pulse to generate initial plasma, so that the main gaps break down and conduct, further, the controlled part of the lightning arrester body is in short circuit, and overvoltage protection of the alternating current controllable lightning arrester on a power system is realized.
Further, in the gap forced triggering device, the high-potential terminal triggering coil and/or the ground-potential terminal triggering coil is a ring-shaped triggering coil.
Further, in the gap forced triggering device, the cross-sectional area of the high-potential side trigger coil and/or the ground-potential side trigger coil is calculated by using the following formula:
in the formula: u shape m The pulse amplitude of the output voltage of the high potential end trigger coil and/or the ground potential end trigger coil is obtained; t is m The rise time of the voltage pulse of the high potential end trigger coil and/or the ground potential end trigger coil; n is the number of coil winding turns of the high potential end trigger coil and/or the ground potential end trigger coil; b is s Magnetic core saturation magnetic induction intensity of the high potential end trigger coil and/or the ground potential end trigger coil; k is a reliable coefficient, and k is more than or equal to 1 and less than or equal to 1.2.
Further, in the gap forced triggering device, the annular inner diameter of the high-potential end triggering coil is larger than the maximum outer diameter of the high-potential end of the controlled part of the lightning arrester body; and/or the annular inner diameter of the ground potential end triggering coil is larger than the maximum outer diameter of the high ground potential end of the controlled part of the lightning arrester body.
Further, in the gap forced triggering device, the high-potential end triggering coil and/or the ground-potential end triggering coil is a single-layer wound coil.
Further, the gap forced triggering device further includes: and the supporting mechanism is used for supporting the two main electrodes.
Further, in the gap forced triggering apparatus, the supporting mechanism includes: a supporting base; an insulating support column disposed above the support base; and the two insulating supports are arranged at the top ends of the insulating support columns, and an included angle is formed between the two insulating supports and used for respectively supporting the two main electrodes.
Furthermore, in the gap forced triggering device, a support tube is arranged on the insulating support to support the main electrode and enable the connecting wire to pass through the support tube; the connecting line is used for electrically connecting the main electrode and the high-potential end trigger coil or the ground-potential end trigger coil.
Further, in the gap forced triggering device, a plug hole is formed in the main electrode, the ignition electrode is inserted into the plug hole, the high-potential end triggering coil and/or the ground-potential end triggering coil are/is connected with the main electrode through an outer conductor of a coaxial line, and the high-potential end triggering coil and/or the ground-potential end triggering coil are/is connected with the ignition electrode through an inner conductor of a coaxial line.
In another aspect, the present invention further provides an ac controllable lightning arrester, including: the lightning arrester body and the gap forced triggering device; the gap forcing trigger device is connected in parallel to the controlled part of the arrester body, a high-potential end trigger coil of the gap forcing trigger device is sleeved at the high-potential end of the controlled part of the arrester body, and a ground-potential end trigger coil of the gap forcing trigger device is sleeved at the ground-potential end of the controlled part of the arrester body.
The gap forced trigger device and the alternating current controllable lightning arrester provided by the invention can generate voltage trigger pulse with higher amplitude when the action current of the lightning arrester body flows through the controlled part through the high-potential end trigger coil sleeved on the high-potential end of the controlled part of the alternating current controllable lightning arrester and the ground-potential end trigger coil sleeved on the ground-potential end of the controlled part of the alternating current controllable lightning arrester, and lead the output voltage to the ignition gap between the ignition electrode and the main electrode, so that the ignition electrode breaks down the ignition gap to discharge under the action of the voltage trigger pulse to generate initial plasma, so that the main gap breaks down and conducts, the controlled part of the lightning arrester body is in short circuit, and the overvoltage protection of the alternating current controllable lightning arrester on a power system is realized. The device does not need any external power supply, only utilizes the controllable lightning arrester as a trigger energy source of the forced trigger type gap to work and obtain energy, solves the problem that the forced trigger type gap needs external distribution energy as a controllable unit, and can also send trigger pulse to the ignition gap when overvoltage occurs in the system, so that the main gap is forced to be triggered and conducted, and the function of forced trigger of the gap is realized.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural view of a controllable lightning arrester in the prior art;
fig. 2 is a schematic structural diagram of an ac controllable lightning arrester according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an ac controllable lightning arrester according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a high-potential end trigger coil and/or a ground-potential end trigger coil provided in an embodiment of the present invention;
fig. 5 is a waveform diagram of an output voltage pulse generated by the high-potential-end trigger coil and/or the ground-potential-end trigger coil according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 2 to 3, preferred structures of the ac controllable lightning arrester provided by the embodiment of the invention are shown. As shown in the figure, the ac controllable lightning arrester includes: the lightning arrester comprises a lightning arrester body 1 and a gap forced triggering device 2; the lightning arrester comprises a lightning arrester body 1, a gap forcing trigger device 2 and a controlled part 12, wherein the gap forcing trigger device 2 is connected to the controlled part 12 in parallel to serve as a controllable part, so that when a system normally operates, the gap forcing trigger device 2 is in a disconnected state, and the lightning arrester body is put into operation; when the overvoltage occurs in the system, the gap force trigger device 2 is rapidly conducted, and the controlled part 12 is in short circuit, so that the volt-ampere characteristic of the arrester body is dynamically changed, and the overvoltage of the system is deeply reduced.
With continued reference to fig. 2 to 3, the gap forcing trigger device 2 includes: a high-potential end trigger coil 21, a ground-potential end trigger coil 22, two main electrodes 23, two ignition electrodes 24, and a support mechanism 25; wherein, the first and the second end of the pipe are connected with each other,
the high-potential end trigger coil 21 is used for being sleeved at a high-potential end of a controlled part of the alternating current controllable lightning arrester so as to generate a voltage trigger pulse when the alternating current controllable lightning arrester flows through action current; the ground potential terminal trigger coil 22 is adapted to be connected to the ground potential terminal of the controlled portion of the ac controllable arrester for generating a voltage trigger pulse when the ac controllable arrester passes through the action current. Specifically, the high-potential side trigger coil 21 may be fitted to the high-potential side of the controlled section 12, i.e., near the end (top end as shown in fig. 2) to which the high-voltage bus bar is connected, and the high-potential side trigger coil 21 may be fitted to the flange of the high-potential side of the controlled section 12 to connect and fix the high-potential side trigger coil 21Determining; the ground potential end trigger coil 22 can be sleeved at a ground potential end of the controlled part 12, namely, an end part (a bottom end as shown in fig. 2) close to a ground wire, and the ground potential end trigger coil 22 can be sleeved at a flange plate at a low potential end of the controlled part 12 to realize connection and fixation of the ground potential end trigger coil 22; when the operating current i of the arrester body 1 flows through the controlled portion 12, that is, the operating current i flows through the high-potential-end trigger coil 21 and the ground-potential-end trigger coil 22, since the outputs of the high-potential-end trigger coil 21 and the ground-potential-end trigger coil 22 are approximately no-load, a voltage trigger pulse having a relatively high amplitude is generated at the output ends of the high-potential-end trigger coil 21 and the ground-potential-end trigger coil 22. In FIG. 3, TC 1 The high potential end triggers the coil 21, TC 2 The coil 22 is triggered at ground potential.
A main gap 26 is provided between the two main electrodes 23, the two ignition electrodes 24 are in one-to-one correspondence with the two main electrodes 23, and an ignition gap (not shown in the drawing) is provided between the ignition electrode 24 and the corresponding main electrode 23, both ends of the high-potential end trigger coil 21 are electrically connected with one of the main electrodes 23 (the left main electrode shown in fig. 2) and the ignition electrode 24 corresponding to the main electrode 23, respectively, both ends of the ground-potential end trigger coil 22 are electrically connected with the other main electrode 23 (the right main electrode shown in fig. 2) and the ignition electrode 24 corresponding to the main electrode 23, respectively, the main electrode 23 and the corresponding ignition electrode 24 breakdown the ignition gap to discharge to generate initial plasma under the action of a voltage trigger pulse, so that the main gap 26 breaks down and conducts, and further the controlled part of the arrester body is short-circuited, thereby realizing overvoltage protection of the ac controllable arrester body for the power system, that the high-potential end trigger coil 21 and the ground-potential end trigger coil 22 generate a pulse high voltage, which acts on the corresponding ignition electrode 24, the ignition electrode 24 to discharge the main gap 26, the main electrode 24 discharges, so that the discharge of the main gap 26 between the main electrodes 23 causes the electric field of the main electrode 26 to generate a large potential end trigger coil, so that the main electrode 23 breaks down, the main electrode gap 26 to generate a voltage breakdown voltage of the main electrode 23, and the main electrode 23, thereby reducing the breakdown of the main electrode 23, and the breakdown of the lightning arrester system, and the breakdown of the lightning system, and the lightning arrester to reduce the breakdown of the lightning system, and the lightning arrester to form a dynamic breakdown of the lightning arrester, and the lightning system, thereby reducing the breakdown of the lightning arrester, and the lightning system, and further reducing the lightning arrester, and the breakdown of the lightning arrester. In order to support and fix the ignition electrode 24, the main electrode 23 may be provided with a plug hole (not shown), and the ignition electrode 24 may be inserted into the plug hole and may be supported by an insulating member, so that an ignition gap is formed between the ignition electrode 24 and the main electrode 23; the high-potential end trigger coil 21 and/or the ground potential end trigger coil 22 are connected with the main electrode 23 through a coaxial outer conductor, and the high-potential end trigger coil 21 and/or the ground potential end trigger coil 22 are connected with the ignition electrode 24 through a coaxial inner conductor, so that a voltage trigger pulse with a higher amplitude value generated by the high-potential end trigger coil 21 and/or the ground potential end trigger coil 22 is output to the main electrode 23 and the ignition electrode 24, and further breakdown conduction of the main gap 26 is realized through the ignition electrode 24; of course, the high-potential end trigger coil 21 and/or the ground-potential end trigger coil 22 may be electrically connected to the main electrode 23 and the ignition electrode 24 in other manners, which is not limited in this embodiment.
The supporting mechanism 25 is used to support the two main electrodes 23, so that a main gap 26 is formed between the two main electrodes 23. Specifically, the support mechanism 25 functions as a support to support the main electrode 23. The ignition electrode 24 is supported and fixed in the socket of the main electrode 23 by an insulating member to achieve discharge triggering.
With continued reference to fig. 2, the support mechanism 25 includes: a support seat 251, an insulating support 252 and two insulating supports 253; wherein the insulating support 252 is disposed above the support base 251 (relative to the position shown in fig. 2); the two insulating supports 253 are disposed on top of the insulating support 252, and the two insulating supports 253 are disposed at an angle to support the two main electrodes 23 respectively. Specifically, the supporting seat 251 may be a supporting plate or other structure, and may be clamped on the ground or a working surface; the insulating support 252 may be an insulator, which is vertically disposed at a middle position of the support base 252; the two insulating supports 253 can also be insulators, and both bottom ends thereof can be connected to the top ends of the insulating posts 252, and the top ends thereof can be used as supporting ends for supporting the main electrodes 23. In order to support the main electrode 23, preferably, the insulating support 253 is provided with a support tube 254 for supporting the main electrode 23, and a connecting wire, such as a coaxial wire, is inserted through the support tube 254; the connecting wire is used for electrically connecting the main electrode 23 with the high-potential end trigger coil 21 or the ground-potential end trigger coil 22 so as to avoid the disorder of the circuit on the device; it is further preferred that the support tube 254 is slidably coupled to the top end of the insulating support 253 to adjust the distance of the main gap 26 between the two main electrodes 23.
With continued reference to fig. 2 and 4, in order to facilitate voltage triggering of the high-potential-side trigger coil 21 and the ground-potential-side trigger coil 22, it is preferable that the high-potential-side trigger coil 21 and/or the ground-potential-side trigger coil 22 be annular trigger coils so as to be sleeved on the high-potential side and the ground potential side of the controlled portion 12, respectively. Further preferably, the annular inner diameter of the high-potential end trigger coil 21 is larger than the maximum outer diameter of the high-potential end of the controlled portion of the arrester body; and/or the annular inner diameter of the ground potential end trigger coil 22 is larger than the maximum outer diameter of the high ground potential end of the controlled part of the lightning arrester body, so that the sleeve mounting requirements of the high ground potential end trigger coil 21 and the ground potential end trigger coil 22 are met. The high-potential-end trigger coil 21 and/or the ground-potential-end trigger coil 22 are single-layer wound coils, that is, the coil windings are wound in a single layer, so as to eliminate an interlayer capacitance effect caused by multilayer winding, and the capacitance effect can reduce the amplitude of the output voltage pulse.
In the present embodiment, the cross-sectional area of the high-potential-side trigger coil 21 and/or the ground-potential-side trigger coil 22 is calculated using the following formula:
in the formula: u shape m The output voltage pulse amplitude of the high-potential end trigger coil 21 and/or the ground-potential end trigger coil 22; t is m The rise time of the voltage pulse for the high-potential-end trigger coil 21 and/or the ground-potential-end trigger coil 22; n is the number of coil winding turns of the high-potential-end trigger coil 21 and/or the ground-potential-end trigger coil 22; b is s Triggering the coil 21 and/or ground for the high potential sideThe magnetic core saturation magnetic induction intensity of the potential end trigger coil 22; k is a reliable coefficient, and k is more than or equal to 1 and less than or equal to 1.2.
In this embodiment, the main electrode 23 may be a hemispherical electrode, and the electric field distribution thereof is uniform, and the discharge voltage is stable.
The following describes the gap forcing trigger device provided in the embodiment of the present invention in more detail.
As shown in fig. 2 to 4, the gap forced triggering apparatus includes: a high-potential end trigger coil 21, a ground-potential end trigger coil 22, two main electrodes 23, two ignition electrodes 24, and a support mechanism 25; the high-potential end trigger coil 21 and the ground potential end trigger coil 22 are respectively sleeved on a flange plate at the high-potential end of the controlled part 12 of the arrester body and a flange plate at the high-ground potential end of the controlled part 12 of the arrester body; one end of the high potential end trigger coil 21 is connected with a main electrode 23 through a coaxial outer conductor, and the output end of the high potential end trigger coil 21 is connected with an ignition electrode 24 arranged in the main electrode 23 through a coaxial inner conductor, namely a core wire; one end of the ground potential terminal trigger coil 22 is connected to the main electrode 23 through an outer conductor of the coaxial line, and an output end of the ground potential terminal trigger coil 22 is connected to the inner conductor of the coaxial line
An ignition electrode 24 provided in the main electrode 23; the annular inner diameters Di of the high-potential end trigger coil 21 and the ground-potential end trigger coil 22 are Di =250mm; the coil winding adopts single-layer winding, and the number of turns N is N =1000; the magnetic core is made of nanocrystalline material and has saturation magnetic induction intensity B s Is taken as B s =1.1T; when the output voltage pulse amplitude U m Is taken as U m =3.5kV; rise time T of voltage pulse m Taking Tm =100us, and taking the reliability coefficient k as k =1;
calculating according to the formula to obtain the coil annular section S of more than or equal to 203mm 2 S is taken as S =225mm 2 . According to the test, the trigger coils TC1 and TC2, namely the high potential end trigger coil 21 and the ground potential end trigger coil 22 outputThe trigger voltage pulse waveform generated at the end is shown in fig. 5, under the action of the voltage trigger pulse, an ignition gap with the distance of 2mm can be punctured, and the generated initial plasma can cause the main gap to be forcibly triggered to conduct.
In summary, according to the gap forcing trigger device and the ac controllable lightning arrester provided by this embodiment, the high-potential end trigger coil 21 connected to the high-potential end of the controlled portion of the ac controllable lightning arrester in a sleeved manner and the ground-potential end trigger coil 22 connected to the ground-potential end of the controlled portion of the ac controllable lightning arrester in a sleeved manner can generate a voltage trigger pulse with a higher amplitude when the action current i of the lightning arrester body 1 flows through the controlled portion 12, and an output voltage is led out to the ignition gap between the ignition electrode 24 and the main electrode 23, so that the ignition electrode 24 breaks through the ignition gap under the action of the voltage trigger pulse to generate an initial plasma, so as to break through the main gap 26, short-circuit the controlled portion of the lightning arrester body, and implement overvoltage protection of the ac controllable lightning arrester on the power system. The device does not need any external power supply, only utilizes the controllable lightning arrester as a trigger energy source of the forced trigger type gap to work and obtain energy, solves the problem that the forced trigger type gap needs external energy distribution as a controllable unit, and can also send trigger pulse to the ignition gap when overvoltage occurs to the system, so that the main gap is forced to be triggered and conducted, and the gap forced trigger function is realized.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. An alternating current controllable lightning arrester, comprising: the lightning arrester comprises a lightning arrester body and a gap forced triggering device; wherein the content of the first and second substances,
the gap forced triggering device is connected in parallel with the controlled part of the arrester body, a high-potential end triggering coil of the gap forced triggering device is sleeved at the high-potential end of the controlled part of the arrester body, and a ground-potential end triggering coil of the gap forced triggering device is sleeved at the ground-potential end of the controlled part of the arrester body;
the gap forcing trigger device includes: the high-potential end trigger coil, the ground-potential end trigger coil, the supporting mechanism, the two main electrodes and the two ignition electrodes are arranged on the high-potential end trigger coil; wherein the content of the first and second substances,
the high-potential end triggering coil is used for being sleeved at the high-potential end of the controlled part of the alternating current controllable lightning arrester so as to generate voltage triggering pulse when the alternating current controllable lightning arrester flows through action current;
the ground potential end trigger coil is used for being sleeved at the ground potential end of the controlled part of the alternating current controllable lightning arrester so as to generate voltage trigger pulse when the alternating current controllable lightning arrester flows through action current;
a main gap is formed between the two main electrodes, the two ignition electrodes correspond to the two main electrodes one by one, plug holes are formed in the main electrodes, the ignition electrodes are inserted in the plug holes, and an ignition gap is formed between each ignition electrode and the corresponding main electrode;
two ends of the high-potential end trigger coil are respectively and electrically connected with one main electrode and the ignition electrode corresponding to the main electrode, two ends of the ground-potential end trigger coil are respectively and electrically connected with the other main electrode and the ignition electrode corresponding to the main electrode, the main electrodes and the ignition electrodes corresponding to the main electrodes break through the ignition gaps to discharge under the action of the voltage trigger pulse to generate initial plasma, so that the main gaps break through and conduct, further, a controlled part of the lightning arrester body is in short circuit, and overvoltage protection of the alternating-current controllable lightning arrester on a power system is realized;
the supporting mechanism is used for supporting the two main electrodes;
the support mechanism includes:
a supporting seat;
an insulating support column disposed above the support base;
the two insulating supports are arranged at the top ends of the insulating support columns, and an included angle is formed between the two insulating supports to respectively support the two main electrodes; the insulating bracket is provided with a supporting tube for supporting the main electrode; the supporting tube is slidably connected to the top end of the insulating bracket so as to adjust the distance of a main gap between the two main electrodes; a connecting wire is arranged in the supporting tube and used for electrically connecting the main electrode with the high-potential end trigger coil or the ground-potential end trigger coil;
the high potential end trigger coil and/or the ground potential end trigger coil are annular trigger coils;
the cross-sectional area of the high potential side trigger coil and/or the ground potential side trigger coil is calculated by using the following formula:
in the formula: u shape m The output voltage pulse amplitude of the trigger coil at the high potential end and/or the trigger coil at the ground potential end; t is a unit of m Triggering the coil and/or for the high potential sideThe rising time of the voltage pulse of the ground potential end trigger coil; n is the number of turns of the coil winding of the high potential end trigger coil and/or the ground potential end trigger coil; b s Magnetic core saturation magnetic induction intensity of the high potential end trigger coil and/or the ground potential end trigger coil; k is a reliability coefficient, and k is more than or equal to 1 and less than or equal to 1.2.
2. An AC controllable lightning conductor according to claim 1,
the annular inner diameter of the high-potential end trigger coil is larger than the maximum outer diameter of the high-potential end of the controlled part of the lightning arrester body; and/or the presence of a gas in the gas,
the annular inner diameter of the ground potential end triggering coil is larger than the maximum outer diameter of the ground potential end of the controlled part of the lightning arrester body.
3. An alternating current controllable arrester according to claim 1 characterized in that said high potential side trigger coil and/or said ground potential side trigger coil is a single layer wound coil.
4. AC controllable arrester according to claim 1, characterized in that,
the high potential end trigger coil and/or the ground potential end trigger coil are/is connected with the main electrode through coaxial outer conductors, and the high potential end trigger coil and/or the ground potential end trigger coil are/is connected with the ignition electrode through coaxial inner conductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548505.3A CN112736647B (en) | 2020-12-24 | 2020-12-24 | Clearance forced trigger device and alternating current controllable lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548505.3A CN112736647B (en) | 2020-12-24 | 2020-12-24 | Clearance forced trigger device and alternating current controllable lightning arrester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112736647A CN112736647A (en) | 2021-04-30 |
| CN112736647B true CN112736647B (en) | 2023-02-28 |
Family
ID=75605306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011548505.3A Active CN112736647B (en) | 2020-12-24 | 2020-12-24 | Clearance forced trigger device and alternating current controllable lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112736647B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413524A (en) * | 1964-07-14 | 1968-11-26 | English Electric Co Ltd | Apparatus for providing a protective spark gap for a d.c. powerline |
| CN106920607A (en) * | 2015-12-28 | 2017-07-04 | 中国电力科学研究院 | A kind of clearance control type metal oxide arrester |
| CN209994107U (en) * | 2019-06-20 | 2020-01-24 | 王嬿蕾 | Dynamic insulation matched boosting ionization device |
| CN110957638A (en) * | 2019-10-16 | 2020-04-03 | 广西大学 | Advanced discharge device and method for realizing dynamic insulation matching |
| CN112117746A (en) * | 2019-06-20 | 2020-12-22 | 王巨丰 | Method and system for eliminating span central flashover and power frequency insulation strength loss |
-
2020
- 2020-12-24 CN CN202011548505.3A patent/CN112736647B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413524A (en) * | 1964-07-14 | 1968-11-26 | English Electric Co Ltd | Apparatus for providing a protective spark gap for a d.c. powerline |
| CN106920607A (en) * | 2015-12-28 | 2017-07-04 | 中国电力科学研究院 | A kind of clearance control type metal oxide arrester |
| CN209994107U (en) * | 2019-06-20 | 2020-01-24 | 王嬿蕾 | Dynamic insulation matched boosting ionization device |
| CN112117746A (en) * | 2019-06-20 | 2020-12-22 | 王巨丰 | Method and system for eliminating span central flashover and power frequency insulation strength loss |
| CN110957638A (en) * | 2019-10-16 | 2020-04-03 | 广西大学 | Advanced discharge device and method for realizing dynamic insulation matching |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112736647A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8395397B1 (en) | High voltage sensing capacitor and indicator device | |
| JP2013504297A5 (en) | ||
| CN112736647B (en) | Clearance forced trigger device and alternating current controllable lightning arrester | |
| KR101054244B1 (en) | Trigger device and driving method for impulse generator | |
| CN104953470A (en) | Gas spark gap switch for nanosecond pulse generator | |
| CN106448960A (en) | 35KV multi-gap anti-thunder insulator | |
| JP4385104B2 (en) | Steep wave suppression device | |
| CN201364812Y (en) | Current transformer with capacitance differential pressure | |
| US11609590B2 (en) | Power supply for electric utility underground equipment | |
| CN204102652U (en) | A kind of external series gap Penetrative lightning arrester | |
| CN106129994A (en) | A kind of novel efficient extinguishing arc and overvoltage protection | |
| CN108231300B (en) | A kind of parallel connection clearance device of anti-thunder insulator | |
| CN206225098U (en) | A kind of series gap metal oxide arrester | |
| CN205911090U (en) | 35kV takes many clearances lightning -proof insulator | |
| CN214313866U (en) | Lightning arrester for railway traction power supply system | |
| CN220491722U (en) | Three-phase anti-resonance voltage transformer for gas-insulated switchgear | |
| CN202309246U (en) | Suspended power supply for carrying out voltage conversion on high-voltage power transmission line | |
| CN214477144U (en) | Controllable multi-electrode high-voltage conduction switch | |
| CN211150221U (en) | Lightning arrester for distribution network | |
| CN202721334U (en) | Adjustable lightning arrester capable of being used in various kinds of electric power equipment | |
| KR20190080622A (en) | Very fast transient overvoltage suppressing device | |
| CN110707533B (en) | Lightning arrester for electric power iron tower | |
| CN103812008A (en) | Self-synchronizing trigger high capacity discharging gap | |
| CN111431160B (en) | DC blocker | |
| JP3349288B2 (en) | Surge suppressor for high-voltage large-capacity power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |