阅读说明：本技术 一种气体触发间隙开关的自旋弧控制电极及设计方法 (Self-rotating arc control electrode of gas-triggered gap switch and design method ) 是由 徐晓东 李志兵 张然 黄印 林金阳 王雯 刘北阳 田宇 王浩然 赵科 于 2021-06-21 设计创作，主要内容包括：本发明涉及一种气体触发间隙开关的自旋弧控制电极及设计方法,第一电极组件与第二电极组件相对设置,第一电极组件的底端与第二电极组件的顶端间隔预设距离；第一电极组件上设置有第一平面区和第一电弧旋弧区,第一电弧旋弧区围设在第一平面区的外侧；第二电极组件上设置有第二平面区和第二电弧旋弧区,第二电弧旋弧区围设在第二平面区的外侧；设计方法的流程为：确定电极直径-开设旋弧槽-分析电场强度；如此设置,一方面,有效控制气体触发间隙开关通流过程中的电弧旋转,减少电极局部烧蚀,提高了气体间隙开关的绝缘性能和电极大通流的抗烧蚀性；另一方面,便于等离子体喷射装置安装。(The invention relates to a self-spinning arc control electrode of a gas trigger gap switch and a design method thereof.A first electrode assembly and a second electrode assembly are oppositely arranged, and the bottom end of the first electrode assembly and the top end of the second electrode assembly are separated by a preset distance; the first electrode assembly is provided with a first plane area and a first arc rotating area, and the first arc rotating area is surrounded on the outer side of the first plane area; the second electrode assembly is provided with a second planar area and a second arc rotating area, and the second arc rotating area is surrounded on the outer side of the second planar area; the design method comprises the following steps: determining the diameter of an electrode, forming a rotary arc groove, and analyzing the electric field intensity; according to the arrangement, on one hand, the arc rotation in the through-flow process of the gas-triggered gap switch is effectively controlled, the local ablation of the electrode is reduced, and the insulating property of the gas-triggered gap switch and the ablation resistance of the extremely large through-flow of the electrode are improved; on the other hand, the installation of the plasma jet device is convenient.)

1. A gas-triggered gap switch spinning arc control electrode, characterized by: comprises a first electrode assembly and a second electrode assembly;

the first electrode assembly is arranged opposite to the second electrode assembly, and the bottom end of the first electrode assembly is spaced from the top end of the second electrode assembly by a preset distance;

the first electrode assembly is provided with a first planar area and a first arc rotating area, and the first arc rotating area is surrounded on the outer side of the first planar area;

the second electrode assembly is provided with a second planar area and a second arc rotating area, and the second arc rotating area is surrounded on the outer side of the second planar area;

the first plane area and the second plane area are correspondingly arranged and matched for use, and the first arc rotating area and the second arc rotating area are correspondingly arranged and matched for use.

2. The spin arc control electrode of a gas triggered gap switch of claim 1, wherein: the first electrode assembly comprises a first electrode and a first connecting piece, one end of the first connecting piece is connected with the first electrode, and the first plane area and the first arc rotating area are both arranged on the first electrode;

an end of the first connector facing the first electrode is located within the first planar region.

3. The spin arc control electrode of a gas triggered gap switch of claim 2, wherein: the second electrode assembly comprises a second electrode and a second connecting piece, one end of the second connecting piece is connected with the second electrode, and the second planar area and the second arc rotating area are both arranged on the second electrode;

an end of the second connector facing the second electrode is located within the second planar region.

4. A spinning arc control electrode of a gas triggered gap switch as claimed in claim 3 wherein: the first electrode and the second electrode are both disc-shaped, and the diameter ranges of the first electrode and the second electrode are both larger than 100 mm.

5. The spin arc control electrode of a gas triggered gap switch of claim 4, wherein: a plurality of first arc rotating grooves are formed in the first arc rotating area and are arranged at intervals around the circumferential direction of the first electrode;

and a plurality of second arc rotating grooves are formed in the second arc rotating area and are arranged around the second electrode at intervals in the circumferential direction.

6. The spin arc control electrode of a gas triggered gap switch of claim 5, wherein: the first arc rotating groove and the second arc rotating groove are both arc-shaped, and the bending directions of the first arc rotating groove and the second arc rotating groove are opposite.

7. A spinning arc control electrode of a gas triggered gap switch as claimed in claim 3 wherein: the second connecting piece is T-shaped, a long through hole is formed in the second connecting piece, an injection hole is formed in the second plane area, and the injection hole is communicated with the long through hole;

the long through hole is used for accommodating the plasma jet device.

8. The spin arc control electrode of a gas triggered gap switch of claim 1, wherein: the first arc rotating area is obliquely arranged relative to the first plane area, and the second arc rotating area is obliquely arranged relative to the second plane area.

9. A design method of a spin arc control electrode according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

determining diameters of the first electrode and the second electrode;

a plurality of first arc rotating grooves are formed in the first arc rotating area, and a plurality of second arc rotating grooves are formed in the second arc rotating area;

and analyzing and calculating the electric field distribution by using an electric field calculation method to ensure that the electric field intensity between the first electrode and the second electrode conforms to an expected electric field value.

10. The design method according to claim 9, wherein: the thickness range of the electrode plate of the first electrode and the second electrode is 6mm-10 mm.

Technical Field

The invention relates to the technical field of gas-triggered gap switches, in particular to a self-rotating arc control electrode of a gas-triggered gap switch and a design method.

Background

Currently, the gas-triggered gap switch is a sulfur hexafluoride (SF) gas-triggered gap switch₆) Or SF₆/N₂The gas is used as an insulating medium, a quick-closing switch for conducting the main gap within 1ms is utilized by utilizing a plasma microcavity injection technology, and the gas-triggered gap switch can be connected with a breaker in parallel for use, so that the problems of quick control and protection of a power grid are solved.

The working principle of the gas-triggered gap switch is that the plasma jet device releases a large amount of plasma in the micro-cavity under the action of high-voltage pulse to trigger the conduction of the main gap. Firstly, a main electrode structure for triggering the gap switch must have good arc ablation resistance, so that local high-temperature burning loss on the surface of an electrode is avoided, and the electrode form is ensured to be unchanged in high-current arc burning; secondly, the main electrode has good arc control capability, so that the electric arc can be bound in a certain range, and connecting parts, adjacent electrodes and an insulating cylinder around the electrodes cannot be ablated, thereby comprehensively improving the short-time current capability of the gap switch; thirdly, the main electrode design for triggering the gap switch is to meet the requirement of high insulation of the triggering gap switch, and finally, the main electrode needs to be integrally installed with the plasma spraying device to meet the requirement of reliable triggering of the plasma.

A rod-shaped plug-in type electrode is commonly adopted in the existing gas circuit breaker, and a pressure gas type arc blowing structure is assisted to realize the on-off arc extinguishing of the gas circuit breaker. However, the rod-shaped plug-in type electrode has a small diameter, so that the installation requirement of the plasma spraying device cannot be met.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a self-rotating arc control electrode of a gas trigger gap switch and a design method, and the self-rotating arc control electrode has the advantages that the technical problem that a main electrode and a plasma jet device are integrally installed can be solved; meanwhile, the arc ablation resistance and the arc control capability of the main electrode can be improved.

The above object of the present invention is achieved by the following technical solutions: in a first aspect, the present invention provides a self-spinning arc control electrode of a gas-triggered gap switch, the self-spinning arc control electrode of the gas-triggered gap switch characterized by: comprises a first electrode assembly and a second electrode assembly; the first electrode assembly is arranged opposite to the second electrode assembly, and the bottom end of the first electrode assembly is spaced from the top end of the second electrode assembly by a preset distance; the first electrode assembly is provided with a first planar area and a first arc rotating area, and the first arc rotating area is surrounded on the outer side of the first planar area; the second electrode assembly is provided with a second planar area and a second arc rotating area, and the second arc rotating area is surrounded on the outer side of the second planar area; the first plane area and the second plane area are correspondingly arranged and matched for use, and the first arc rotating area and the second arc rotating area are correspondingly arranged and matched for use.

Preferably, the first electrode assembly includes a first electrode and a first connecting piece, one end of the first connecting piece is connected to the first electrode, and the first planar area and the first arc rotating area are both disposed on the first electrode; an end of the first connector facing the first electrode is located within the first planar region.

Preferably, the second electrode assembly includes a second electrode and a second connecting member, one end of the second connecting member is connected to the second electrode, and the second planar area and the second arc rotating area are both disposed on the second electrode; an end of the second connector facing the second electrode is located within the second planar region.

Preferably, in the spin arc control electrode of the gas-triggered gap switch provided by the present invention, the first electrode and the second electrode are both in a shape of a disk, and the diameter ranges of the first electrode and the second electrode are both greater than 100 mm.

Preferably, according to the self-rotating arc control electrode of the gas-triggered gap switch provided by the invention, a plurality of first rotating arc grooves are formed in the first arc rotating area, and the first rotating arc grooves are arranged around the first electrode at intervals in the circumferential direction; and a plurality of second arc rotating grooves are formed in the second arc rotating area and are arranged around the second electrode at intervals in the circumferential direction.

Preferably, in the self-rotating arc control electrode of the gas-triggered gap switch provided by the present invention, the first rotating arc groove and the second rotating arc groove are both arc-shaped, and the bending directions of the first rotating arc groove and the second rotating arc groove are opposite.

Preferably, in the self-rotating arc control electrode of the gas trigger gap switch provided by the invention, the second connecting piece is in a T shape, a long through hole is formed in the second connecting piece, an injection hole is formed in the second plane area, and the injection hole is communicated with the long through hole; the long through hole is used for accommodating the plasma jet device.

Preferably, the first arc whirl zone is disposed obliquely relative to the first plane zone, and the second arc whirl zone is disposed obliquely relative to the second plane zone.

In a second aspect, the present invention further provides a design method for designing the spin arc control electrode, including the following steps:

determining diameters of the first electrode and the second electrode;

a plurality of first arc rotating grooves are formed in the first arc rotating area, and a plurality of second arc rotating grooves are formed in the second arc rotating area;

and analyzing and calculating the electric field distribution by using an electric field calculation method to ensure that the electric field intensity between the first electrode and the second electrode conforms to an expected electric field value.

Preferably, according to the design method provided by the invention, the electrode plate thickness of each of the first electrode and the second electrode ranges from 6mm to 10 mm.

In conclusion, the beneficial technical effects of the invention are as follows: according to the design method of the spin arc control electrode, the spin arc control electrode comprises a first electrode assembly and a second electrode assembly; the first electrode assembly and the second electrode assembly are oppositely arranged, and the bottom end of the first electrode assembly is separated from the top end of the second electrode assembly by a preset distance; the first electrode assembly is provided with a first plane area and a first arc rotating area, and the first arc rotating area is surrounded on the outer side of the first plane area; the second electrode assembly is provided with a second planar area and a second arc rotating area, and the second arc rotating area is surrounded on the outer side of the second planar area; the first plane area and the second plane area are correspondingly arranged and matched for use, and the first arc rotating area and the second arc rotating area are correspondingly arranged and matched for use; the design method of the spinning arc control electrode comprises the following steps: determining the diameter of an electrode, forming a rotary arc groove, and analyzing the electric field intensity; according to the arrangement, on one hand, the arc rotation in the through-flow process of the gas-triggered gap switch is effectively controlled, the local ablation of the electrode is reduced, and the insulating property of the gas-triggered gap switch and the ablation resistance of the extremely large through-flow of the electrode are improved; on the other hand, the installation of the plasma jet device is convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of a spin arc control electrode according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a spin arc control electrode provided by an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a first electrode assembly in a spin arc control electrode according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second electrode assembly in the spin arc control electrode provided by the embodiment of the invention.

FIG. 5 is a flowchart of a design method according to another embodiment of the present invention.

In the figure, 1, a spin arc control electrode; 10. a first electrode assembly; 101. a first electrode; 1011. a first planar zone; 1012. a first arc whirl zone; 1013. a first spiral arc groove; 102. a first connecting member; 103. a detection hole; 20. a second electrode assembly; 201. a second electrode; 2011. a second planar region; 2012. a second arc spinning zone; 2013. a second spiral arc groove; 2014. an injection hole; 202. a second connecting member; 2021. a connecting rod; 2022. a connecting plate; 2023. a long through hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a spinning arc control electrode 1 of a gas-triggered gap switch disclosed by the invention comprises a first electrode assembly 10 and a second electrode assembly 20; the first electrode assembly 10 is disposed opposite to the second electrode assembly 20, and taking the orientation shown in fig. 1 as an example, the first electrode assembly 10 is located right above the second electrode assembly 20, and the bottom end of the first electrode assembly 10 is spaced from the top end of the second electrode assembly 20 by a predetermined distance; this predetermined distance is also referred to as the trigger gap interruption.

Specifically, a plasma spraying device is arranged in the second electrode assembly 20, and the plasma spraying device releases a large amount of plasma under the action of high-voltage pulse, and the large amount of plasma triggers the gap fracture conduction.

Wherein, the first electrode assembly 10 is provided with a first plane area 1011 and a first arc rotating area 1012, and the first arc rotating area 1012 surrounds the outer side of the first plane area 1011; a second planar area 2011 and a second arc whirl area 2012 are arranged on the second electrode assembly 20, and the second arc whirl area 2012 is surrounded on the outer side of the second planar area 2011; the first plane area 1011 and the second plane area 2011 are correspondingly arranged and matched for use, and the first arc rotating area 1012 and the second arc rotating area 2012 are correspondingly arranged and matched for use; by arranging the first arc rotary arc region 1012 and the second arc rotary arc region 2012, the arc burning resistance of the first electrode assembly 10 and the second electrode assembly 20 is improved, local high-temperature burning loss of the first electrode assembly 10 and the second electrode assembly 20 is avoided, and the shape of the first electrode assembly 10 and the shape of the second electrode assembly 20 are ensured to be unchanged during high-current arc burning.

With continued reference to fig. 1-3, in the present embodiment, the first electrode assembly 10 includes a first electrode 101 and a first connector 102, one end of the first connector 102 is connected to the first electrode 101, and the first planar area 1011 and the first arc whirl area 1012 are disposed on the first electrode 101; the end of the first connection 102 facing the first electrode 101 is located within the first planar area 1011; by providing the first arc whirl region 1012 on the first electrode 101, the arc burning resistance of the first electrode 101 is improved.

Further, the first electrode 101 has a disk shape; by arranging the first plane area 1011 and the first arc rotating area 1012 on the first electrode 101, after the first plane area 1011 performs arc, under the action of a magnetic field generated by radial current of the first electrode 101, axial electric arc is acted by radial ampere force, and the axial electric arc rapidly moves to the edge of the first electrode 101 to rotate along the first electrode 101; therefore, the ablation of the arc to the first electrode 101 is reduced, the through-flow and quick insulation recovery performance of the gas trigger gap switch are improved, and the service life of the first electrode 101 is prolonged.

Specifically, referring to fig. 3, the first plane area 1011 is disposed in a central area of the first electrode 101, that is, the first plane area 1011 is a circular area centered on the geometric center of the first electrode 101, and the first arc whirl area 1012 surrounds the first plane area 1011.

In other embodiments, the first planar area 1011 may also be a square or an oval centered at the geometric center of the first electrode 101.

Further, in the present embodiment, the first arc whirl area 1012 is disposed obliquely relative to the first plane area 1011, that is, taking the orientation shown in fig. 1 as an example, the first arc whirl area 1012 extends from the edge of the first plane area 1011 to the edge of the first electrode 101 in a downward inclination manner; thereby, the arc rotation speed is enhanced, and simultaneously the mechanical strength of the first electrode 101 is enhanced, and electrode deformation caused by large-flux ablation is avoided.

Specifically, the thickness of the edge of the first electrode 101 is smaller than the thickness of the inside of the first electrode 101, that is, the edge of the first electrode 101 is thinner than the inside of the first electrode 101, so that the arc diameter of the arc is small, the arc resistance is small, and the arc rotation is facilitated.

Illustratively, the first electrode assembly 10 may have a T-shape, but of course, the first electrode assembly 10 may also have an i-shape. In an implementation of the first electrode assembly 10 having a T-shape, the first connector 102 has a rod shape, the first electrode 101 has a disk shape, and a central axis of the first connector 102 is perpendicular to the first electrode 101.

In order to improve the burning resistance of the first electrode 101, the first electrode 101 may be made of CuW alloy, but the first electrode 101 may be made of other materials as long as the burning resistance is achieved.

To increase the conductivity of the first connecting element 102, the first connecting element 102 may be made of a CuCr alloy, but the first connecting element 102 may also be made of other conductive materials.

For example, the first electrode 101 and the first connecting member 102 may be connected by welding, however, the first electrode 101 and the first connecting member 102 may also be connected by clamping, and the first electrode 101 and the first connecting member 102 may also be connected by bolts.

With continued reference to fig. 1, 2, and 4, in the present embodiment, the second electrode assembly 20 includes a second electrode 201 and a second connecting member 202, one end of the second connecting member 202 is connected to the second electrode 201, and both the second planar region 2011 and the second arc whirl region 2012 are disposed on the second electrode 201; an end of the second connection member 202 facing the second electrode 201 is located in the second planar area 2011; by providing the second arc whirl region 2012 on the second electrode 201, the arc burning resistance of the first electrode 101 is improved.

Further, the second electrode 201 is disc-shaped, and a second planar area 2011 and a second arc rotating area 2012 are arranged on the second electrode 201, so that after the second planar area 2011 is subjected to an arc, under the action of a magnetic field generated by radial current of the second electrode 201, an axial arc is acted by radial ampere force, and the axial arc rapidly moves to the edge of the second electrode 201 to rotate along the second electrode 201; therefore, the ablation of the arc to the second electrode 201 is reduced, the through-flow and quick insulation recovery performance of the gas trigger gap switch are improved, and the service life of the second electrode 201 is prolonged.

Further, in the present embodiment, the second arc whirl zone 2012 is disposed obliquely with respect to the second planar zone 2011, that is, for example, in the orientation shown in fig. 1, the second arc whirl zone 2012 extends obliquely downward from the edge of the second planar zone 2011 to the edge of the second electrode 201; thereby, the arc rotation speed is enhanced, and simultaneously the mechanical strength of the second electrode 201 is enhanced, and electrode deformation caused by large-flux ablation is avoided.

The structure and material of the second electrode 201 are substantially the same as those of the first electrode 101, and the structure and material of the second electrode 201 are not described herein again.

Illustratively, the second electrode assembly 20 may have an I-shape, but the second electrode assembly 20 may also have a T-shape.

In an implementation manner that the second electrode assembly 20 is i-shaped, the second electrode 201 is disc-shaped, the second connector 202 is T-shaped, the second connector 202 includes a connecting rod 2021 and a connecting plate 2022, in a use process, one end of the connecting rod 2021 is connected to the connecting plate 2022, one end of the connecting rod 2021 away from the connecting plate 2022 is connected to the second electrode 201, a central axis of the connecting rod 2021 is perpendicular to the connecting plate 2022, and the connecting plate 2022 is parallel to the second electrode 201. The distance between the bottom end of the second electrode 201 and the top end of the connection plate 2022 is greater than 60mm, so that the arc is prevented from burning the connection plate 2022 when rotating in the second arc rotating region 2012.

Further, in this embodiment, the second connecting member 202 has a long through hole 2023, the second planar area 2011 has an injection hole 2014, and the injection hole 2014 is communicated with the long through hole 2023; the long through hole 2023 is used for accommodating a plasma spraying device; by providing the elongated through hole 2023, the mounting of the plasma j et on the second electrode assembly 20 is thereby facilitated, allowing the second electrode assembly 20 to be mounted with the plasma j et in a small assembly.

The plasma jet device releases a large amount of plasma under the action of high-voltage pulse, and the large amount of plasma is jetted out through the jet hole 2014 to trigger gap fracture conduction.

Specifically, the central axis of the injection hole 2014 is parallel to the central axis of the second electrode 201, and in some realizable manners, the central axis of the injection hole 2014 is collinear with the central axis of the second electrode 201.

In an implementation manner that the second electrode assembly 20 is i-shaped, a channel extending along a central axis direction of the connecting rod 2021 is formed on the connecting rod 2021, a through hole is formed in the connecting plate 2022, the channel and the through hole are correspondingly disposed, the channel is communicated with the through hole, the channel and the through hole form a long through hole 2023, the plasma spraying device is disposed in the long through hole 2023, and the plasma spraying device is detachably connected to the second connecting member 202, so that the plasma spraying device is convenient to maintain.

In an implementation manner in which the first electrode assembly 10 is T-shaped, the top end of the first electrode assembly 10 is opened with a detection hole 103 extending along the central axis direction of the first connecting member 102, and the detection hole 103 penetrates through the first electrode assembly 10. The central axis of the detection hole 103 is parallel to the central axis of the first electrode 101, and in some realizable manners, the central axis of the detection hole 103 is coincident with the central axis of the first electrode 101. The detection hole 103 is a stepped hole.

During use, the inspection hole 103 is disposed corresponding to the injection hole 2014, and the inspection hole 103 is used to check whether the first electrode assembly 10 is laser-centered after being installed.

Further, in the present embodiment, the diameter ranges of the first electrode 101 and the second electrode 201 are both greater than 100 mm; thereby, mounting of the plasma spray device within the second electrode assembly 20 is facilitated.

With reference to fig. 1 to 4, in the present embodiment, a plurality of first arc rotating grooves 1013 are formed on the first arc rotating region 1012, and the plurality of first arc rotating grooves 1013 are arranged around the first electrode 101 at intervals in the circumferential direction; a plurality of second arc rotating grooves 2013 are formed in the second arc rotating area 2012, and the second arc rotating grooves 2013 are arranged around the second electrode 201 at intervals in the circumferential direction; by arranging the first rotary arc groove 1013 and the second rotary arc groove 2013, the arc rapidly moves outwards to the edge of the first electrode 101/the second electrode 201 along the first rotary arc groove 1013/the second rotary arc groove 2013, and then circularly moves around the first electrode 101/the second electrode 201 until the arc is extinguished, so that the local ablation of the first electrode 101/the second electrode 201 by the high-temperature large-current arc is avoided, and the ablation resistance of the first electrode 101 and the second electrode 201 is greatly improved.

Further, in this embodiment, the first arc rotation groove 1013 and the second arc rotation groove 2013 are both arc-shaped, and the bending directions of the first arc rotation groove 1013 and the second arc rotation groove 2013 are opposite, that is, the rotation directions of the first arc rotation groove 1013 and the second arc rotation groove 2013 are opposite; by the fact that the bending directions of the first arc rotating groove 1013 and the second arc rotating groove 2013 are opposite, the bending directions of the first arc rotating groove 1013 and the second arc rotating groove 2013 are consistent during use, and therefore the arc rotates in the same direction.

Illustratively, the first arc runner 1012 defines 6 to 8 first arc runner 1013, although the first arc runner 1012 may define 10 first arc runner 1013. In an implementation manner of forming 6 to 8 first arc rotating grooves 1013 in the first arc rotating area 1012, the first arc rotating grooves 1013 extend along a central axis direction of the first electrode 101 and penetrate through the first electrode 101, the first arc rotating grooves 1013 extend from an edge of the first plane area 1011 to an edge of the first electrode 101 in an irregular arc shape to form an open first arc rotating area 1012, thereby facilitating the arc to rotate around the first electrode 101, wherein a width range of the first arc rotating grooves 1013 is 1 to 2 mm.

Except that the rotation direction of the second rotating arc groove 2013 is opposite to the rotation direction of the first rotating arc groove 1013, the structure of the second rotating arc region 2012 is substantially identical to the structure of the first rotating arc region 1012, and the structure of the second rotating arc region 2012 is not repeated herein.

The working principle of the spin arc control electrode 1 provided by the embodiment is as follows: the plasma generated by the plasma spraying device is sprayed from the spraying hole 2014, and a high-density plasma can be generated between the first electrode 101 and the second electrode 201 within 1ms, so that the gap switch is turned on.

With continued reference to fig. 5, another embodiment provides a design method for the above-described spin arc control electrode 1, comprising the steps of:

s101, determining the diameters of the first electrode 101 and the second electrode 201.

Specifically, the diameters of the first electrode 101 and the second electrode 201 are both larger than 100mm, and the curve radians of the first spiral arc groove 1013 and the second spiral arc groove 2013 are designed.

Further, in the present embodiment, the electrode plate thicknesses of the first electrode 101 and the second electrode 201 are both in the range of 6mm to 10 mm.

According to the gas trigger gap insulation requirement and the through-flow electric power, the electrode plate thickness range of the first electrode 101 and the second electrode 201 is 6-10 mm.

S102, forming a plurality of first arc rotating grooves 1013 in the first arc rotating area 1012, and forming a plurality of second arc rotating grooves 2013 in the second arc rotating area 2012.

The structure of the first electrode 101 and the structure of the second electrode 201 are already described in the above embodiments, and are not repeated herein.

According to the requirement of insulation, the edges of the first electrode 101 and the second electrode 201 are both smooth and rounded.

S103, analyzing and calculating the electric field distribution by using an electric field calculation method, and ensuring that the electric field intensity between the first electrode 101 and the second electrode 201 accords with an expected electric field value.

And analyzing and calculating the electric field distribution by using an electric field calculation method, comparing the electric field intensity between the first electrode 101 and the second electrode 201 at different edges, ensuring that the electric field intensity between the first electrode 101 and the second electrode 201 accords with the expected electric field value, and repeating the steps S101, S102 and S103 until the electric field intensity accords with the expected electric field value if the electric field intensity does not accord with the expected electric field value.

Exemplarily, the design steps of the self-rotating arc control electrode 1 of the DC 80kV gas-triggered gap switch for the white crane beach-jiangsu ± 800kV hybrid direct current transmission project based on the electric field checking method are as follows:

it was determined that the first electrode 101 and the second electrode 201 of the DC 80kV gas triggered gap switch were both 120mm in diameter.

The electrode plate thickness of the first electrode 101 and the second electrode 201 of the DC 80kV gas triggered gap switch were estimated to be 7mm each.

Upper surface round corners R3 and lower surface round corners R2 at the edges of the first electrode 101 and the second electrode 201 are designed.

For a first electrode 101 and a second electrode 201 of the DC 80kV gas-triggered gap switch, electric field distribution is analyzed and calculated by an electric field calculation method, the applied lightning impulse voltage is 250kV, the maximum field intensity near the first electrode 101 and the second electrode 201 appears at the smooth round corners of the first electrode 101 and the second electrode 201, is 19.8kV/mm, and meets the insulation requirement of a white crane beach-Jiangsu +/-800 kV mixed direct current engineering.

The result of the through-flow test of the self-spinning arc control electrode 1 is as follows: based on the actually designed structure of the self-rotating arc control electrode 1, the electrode morphology after direct current 30kA/30ms/50 times of large-current tests is observed, the first electrode 101 and the second electrode 201 are not obviously cracked or tilted, the arc is not burnt to the connecting plate 2022 and surrounding connecting pieces in the rotating process, and the requirement of extra-high voltage engineering is met.

In the design method of the spin arc control electrode 1 provided in this embodiment, the spin arc control electrode 1 includes a first electrode assembly 10 and a second electrode assembly 20; the first electrode assembly 10 is disposed opposite to the second electrode assembly 20, and the bottom end of the first electrode assembly 10 is spaced a predetermined distance from the top end of the second electrode assembly 20; the first electrode assembly 10 is provided with a first plane area 1011 and a first arc rotating area 1012, and the first arc rotating area 1012 surrounds the outer side of the first plane area 1011; a second planar area 2011 and a second arc whirl area 2012 are arranged on the second electrode assembly 20, and the second arc whirl area 2012 is surrounded on the outer side of the second planar area 2011; the first plane area 1011 and the second plane area 2011 are correspondingly arranged and matched for use, and the first arc rotating area 1012 and the second arc rotating area 2012 are correspondingly arranged and matched for use; the design method of the spin arc control electrode 1 comprises the following steps: determining the diameter of an electrode, forming a rotary arc groove, and analyzing the electric field intensity; according to the arrangement, on one hand, the arc rotation in the through-flow process of the gas-triggered gap switch is effectively controlled, the local ablation of the electrode is reduced, and the insulating property of the gas-triggered gap switch and the ablation resistance of the extremely large through-flow of the electrode are improved; on the other hand, the installation of the plasma jet device is convenient.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.