CN112217128B - Metal particle trap arrangement method for GIS/GIL - Google Patents
Metal particle trap arrangement method for GIS/GIL Download PDFInfo
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- CN112217128B CN112217128B CN202011085893.6A CN202011085893A CN112217128B CN 112217128 B CN112217128 B CN 112217128B CN 202011085893 A CN202011085893 A CN 202011085893A CN 112217128 B CN112217128 B CN 112217128B
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- particle trap
- grid
- strip
- shaped particle
- gil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
- H02G5/065—Particle traps
Abstract
The invention provides a metal particle trap arrangement method for a GIS/GIL, which comprises the following steps: one side of the grid-shaped particle trap parallel to the grid is fixed on the lower portion of the inner side of the basin-type insulator in the GIS/GIL in a contact mode, the strip-shaped particle trap is fixed on the other side of the grid-shaped particle trap parallel to the grid, the strip-shaped particle trap is fixedly contacted with the grid-shaped particle trap, and the strip-shaped particle trap is fixed in the middle of the grid-shaped particle trap. The method has a good metal particle capturing effect, and can effectively inhibit the movement of metal particles near the GIS/GIL basin-type insulator.
Description
Technical Field
The invention relates to the field of high-voltage power transmission and transformation in electrical engineering, in particular to a metal particle trap arrangement method for a GIS/GIL.
Background
GIS (Gas Insulated switchgear)/GIL (Gas Insulated switchgear line) has wide application prospect in the field of high-voltage power transmission due to the advantages of large transmission capacity, high reliability, electromagnetic interference resistance and the like. The problem of metal particle pollution is one of the important factors restricting the development of the metal particle pollution, so that researchers propose various treatment means for metal particle pollution, wherein a particle trap is the most common treatment means at present. ABB company, Dale S J company, American West House electric power company and the like carry out a series of work on the optimization design of particle traps, the metal particle traps which are commonly used at present are grid type traps and strip type traps, but the metal particles near the basin-type insulator cannot be completely captured by using the grid type traps; for the use of the strip-shaped trap, the electric field distortion degree is large due to the existence of the grading ring, and the strip-shaped trap cannot effectively inhibit the movement of metal particles.
There is therefore a need for a metal particle trap arrangement method for use in GIS/GILs that can effectively inhibit metal particle movement.
Disclosure of Invention
The invention provides a metal particle trap arrangement method for a GIS/GIL (geographic information System/general information System), which aims to solve the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme.
The embodiment provides a metal particle trap arrangement method for GIS/GIL, which comprises the following steps:
one side of the grid-shaped particle trap parallel to the grid is fixed on the lower portion of the inner side of the basin-type insulator in the GIS/GIL in a contact mode, the strip-shaped particle trap is fixed on the other side of the grid-shaped particle trap parallel to the grid, the strip-shaped particle trap is fixedly contacted with the grid-shaped particle trap, and the strip-shaped particle trap is fixed in the middle of the grid-shaped particle trap.
Preferably, the method further comprises setting the thickness of the strip-shaped particle trap and the thickness of the grid-shaped particle trap to be equal in thickness.
Preferably, the strip particle trap is in fixed contact with the grid-shaped particle trap and comprises: the lowest points of the inner side and the outer side of the groove surface of the grid-shaped particle trap are respectively positioned on the same horizontal plane with the upper surface and the lower surface of the strip-shaped particle trap.
Preferably, the method further comprises mounting a plurality of support legs below the strip particle trap for fixing the strip particle trap.
Preferably, the strip particle trap is in fixed contact with the grid-shaped particle trap and comprises: welding the strip-shaped particle trap to the grid-shaped particle trap.
Preferably, the method further comprises: setting the groove width of the grid type particle trap to be 8mm, the groove distance to be 5mm, the length to be 20cm and the central angle of a sector to be 60 degrees; the strip-shaped particle trap has a length of 20cm, a width of 3cm and a thickness of 3 mm.
Preferably, the method further comprises: and placing the grid-shaped particle trap at a position which is symmetrical by taking the central axis tangent plane of the GIS/GIL as the center.
The technical scheme provided by the method for arranging the metal particle traps in the GIS/GIL is that the grid-shaped particle traps and the strip-shaped particle traps are combined for use, the grid-shaped traps are tightly attached to the basin-type insulators and fixed at the bottom of the GIS/GIL cavity, the strip-shaped particle traps are arranged in front of the basin-type insulators and connected with the grid-shaped traps, and experiments prove that the combined arrangement mode can effectively make up the defects when a single particle trap is adopted, has a good metal particle capturing effect, can more effectively inhibit the movement of metal particles near the basin-type insulators of the GIS/GIL, and has a better metal particle capturing effect compared with the independent combination of the two metal particle traps.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a top view of a GIS/GIL with a grid-type particle trap arranged alone;
FIG. 2 is a GIS/GIL axial view of a single grid-type particle trap;
FIG. 3 is an axial sectional view of a GIS/GIL with individually arranged grid type particle traps;
FIG. 4 is a schematic view of a pressurization process;
FIG. 5 is a top view of a GIS/GIL with individual strip particle traps;
FIG. 6 is a GIS/GIL axial view with individually arranged strip particle traps;
FIG. 7 is an axial sectional view of a GIS/GIL with individually arranged strip particle traps;
FIG. 8 is a top view of the GIS/GIL obtained by the method of the present embodiment;
FIG. 9 is an axial view of the GIS/GIL obtained by the method of the present embodiment;
FIG. 10 is a GIS/GIL axial sectional view obtained by the method of the present embodiment;
FIG. 11 is a top view of the particle placement of the GIS/GIL obtained by the method of this embodiment;
FIG. 12 is an axial view of the particle arrangement of GIS/GIL obtained by the method of this embodiment;
FIG. 13 is an axial sectional view of the particle arrangement of GIS/GIL obtained by the method of the present embodiment;
description of reference numerals:
1-basin-type insulator 2-equalizing ring 3-high-voltage guide rod 4-150 mesh aluminum powder 5-grid-shaped particle trap 6-strip-shaped particle trap.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding of the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments of the present invention are not limited thereto.
Examples
The embodiment of the invention provides a metal particle trap arrangement method for a GIS/GIL, which comprises the following steps:
s1, one side of the grid-shaped particle trap parallel to the grid is fixed on the lower part of the inner side of the basin-type insulator in the GIS/GIL in a contact mode.
S2, fixing the strip-shaped particle trap to the other side of the grid-shaped particle trap parallel to the grid, and fixing the strip-shaped particle trap in fixed contact with the grid-shaped particle trap, and the strip-shaped particle trap being fixed to the middle portion of the grid-shaped particle trap.
Welding a strip-shaped particle trap to the grid-shaped particle trap.
It should be noted that the lowest points of the inner and outer sides of the groove of the grid-shaped particle trap are respectively located on the same horizontal plane with the upper and lower surfaces of the strip-shaped particle trap. And placing the grid-shaped particle trap at a position which is symmetrical by taking the central axis tangent plane of the GIS/GIL as the center.
The method further requires setting the thickness of the strip-shaped particle trap and the thickness of the grid-shaped particle trap to be equal in thickness; a plurality of supporting legs are arranged below the strip-shaped particle trap and used for fixing the strip-shaped particle trap.
Schematically, in the present embodiment, the groove width of the grid-type particle trap is set to 8mm, the groove pitch is set to 5mm, the length is set to 20cm, and the central angle of the sector is set to 60 °; the strip-shaped particle trap has a length of 20cm, a width of 3cm and a thickness of 3 mm.
Comparative effect example:
comparing results obtained by independently arranging grid-type particle traps, independently arranging strip-type particle traps and adopting the combined mode of the embodiment respectively in an experiment mode, wherein the experiment takes a 126kV true GIL (single-phase rated voltage is about 72kV) system as a platform, 150-mesh aluminum powder which is uniformly arranged simulates metal particles in actual operation, the groove width of the grid-type particle traps adopted in the experiment is 8mm, the groove distance is 5mm, the length is 20cm, and the central angle of a sector surface is 60 degrees; the strip particle trap has a length of 20cm, a width of 3cm and a thickness of 3 mm. The trapping effect of the trap is mainly embodied by two aspects, firstly, whether the metal particles move in the pressurizing process is judged, if the metal particles do not move, the trap is considered to achieve the ideal trapping effect, if the metal particles move, the trapping effect of the trap is evaluated by the trapping rate of the metal particles, and the trapping rate is defined as the following formula (1):
wherein, FtrapFor capturingRate, McapFor (pre) trapping of particle mass, MescThe larger the trapping coefficient for the mass of the escaping particles, the better the trapping effect of the trap.
1) Arranging grid type particle trap alone
In the experiment, aluminum powder which is uniformly distributed is used for simulating metal particles in actual operation, wherein the groove width of a grid-type particle trap is 8mm, the groove distance is 5mm, fig. 1 is a GIS/GIL top view for independently distributing the grid-type particle trap, fig. 2 is a GIS/GIL axial view for independently distributing the grid-type particle trap, and fig. 3 is an axial sectional view of the GIS/GIL for independently distributing the grid-type particle trap; fig. 4 is a schematic diagram of a pressurization procedure, and in order to explore the trapping effect of the trap on the metal particles, the movement of the metal particles and the change of the distribution of the metal particles before and after pressurization in fig. 4 are selected to reflect the trapping effect of the metal particle trap.
According to the experimental phenomenon, the metal particles in front of the grid type particle trap obviously move in the pressurizing process; after the pressurization is finished, part of particles in front of the grid-type trap move to the capture range of the trap, and the metal particles entering the capture range of the trap stop moving, so that the grid-type particle trap has a certain capture effect on the metal particles in front of the grid-type particle trap when the grid-type particle trap is independently arranged; meanwhile, in an experiment, the metal particles move towards the insulator, and a part of the metal particles move towards the direction far away from the insulator, the movement mode of the metal particles is not beneficial to the capture of the trap, and the capture rate of the particle trap is 1.82 in the mode through calculation.
2) Individually arranged strip-shaped particle traps
When the trapping effect of the strip-shaped particle trap is studied, the experiment platform, the study object and the pressurization program are unchanged, the length of the strip-shaped particle trap is 20cm, the width of the strip-shaped particle trap is 3cm, the thickness of the strip-shaped particle trap is 3mm, and the arrangement of the strip-shaped particle trap and the metal particles is shown in fig. 5, 6 and 7, wherein fig. 5 is a GIS/GIL top view in which the strip-shaped particle trap is arranged alone, fig. 6 is a GIS/GIL axial view in which the strip-shaped particle trap is arranged alone, and fig. 7 is a GIS/GIL axial sectional view in which the strip-shaped particle trap is arranged alone.
Compared with the distribution of metal particles before and after pressurization, the strip-shaped particle trap has a better capturing effect on the metal particles in front of the strip-shaped particle trap, compared with a grid-type particle trap, no particles moving towards the direction far away from the trap exist, and the capturing rate is close to infinity because the mass of escaping particles is about 0. However, in the vicinity of the grading ring, the electric field distortion degree is large due to the existence of the grading ring, and the metal particles cannot be effectively captured by the strip-shaped traps, so that according to experimental results, the capture rate of the metal particles close to the grading ring is only 0.13, and the capture rate of the metal particles far away from the grading ring and on one side of the strip-shaped traps is 1.6.
3) The GIS/GIL obtained by the method for arranging metal particle traps used in the GIS/GIL according to the present embodiment is shown in fig. 8, 9 and 10, where fig. 8 is a top view of the GIS/GIL obtained by the method according to the present embodiment, fig. 9 is an axial view of the GIS/GIL obtained by the method according to the present embodiment, and fig. 10 is an axial sectional view of the GIS/GIL obtained by the method according to the present embodiment. As shown in the figure, on the side close to the basin insulator 1, the metal particles can be captured better by using the grid particle type trap due to the existence of the grading ring 2, and in order to compensate the defects of the grid particle type trap, a strip-shaped particle trap is fixed in front of the grid particle trap to prevent the metal particles from moving in the direction away from the trap. Under the combined mode of the particle trap, low field intensity areas can be formed on two sides and in front of the strip-shaped trap, and capture of metal particles is facilitated.
Experiments are carried out to verify the trapping effect of the GIS/GIL obtained by the method of the embodiment, and the arrangement of traps and metal particles in the experiments is shown in fig. 11, 12 and 13, wherein fig. 11 is a top view of the particle arrangement of the GIS/GIL obtained by the method of the embodiment, fig. 12 is an axial view of the particle arrangement of the GIS/GIL obtained by the method of the embodiment, and fig. 13 is an axial sectional view of the particle arrangement of the GIS/GIL obtained by the method of the embodiment.
Particles on two sides of the strip-shaped particle trap are not obviously changed all the time in the whole pressurizing process, which shows that the method can effectively inhibit the movement of the particles on two sides of the strip-shaped particle trap, namely has better capturing effect. Comparing the distribution of metal particles in front of the strip-shaped particle trap before and after pressurization, it can be seen that the method has substantially the same capture effect on particles in front of the strip-shaped trap as when the strip-shaped trap is used alone, i.e. there are no particles moving away from the trap, and the capture rate approaches infinity because the mass of escaping particles is about 0.
In conclusion, the method makes up the defect of capturing the metal particles when a single trap is used, and can achieve a good capturing effect on the metal particles in any area near the insulator.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A metal particle trap arrangement method for use in GIS/GIL, comprising:
one side of the grid-shaped particle trap parallel to the grid is fixed on the lower portion of the inner side of the basin-type insulator in the GIS/GIL in a contact mode, the strip-shaped particle trap is fixed on the other side of the grid-shaped particle trap parallel to the grid, the strip-shaped particle trap is fixedly contacted with the grid-shaped particle trap, and the strip-shaped particle trap is fixed in the middle of the grid-shaped particle trap.
2. The method of claim 1, further comprising setting the thickness of the strip particle trap and the thickness of the grid-shaped particle trap to be equal.
3. The method of claim 2, wherein said fixedly contacting the strip particle trap with the grid-shaped particle trap comprises: the lowest points of the inner side and the outer side of the groove surface of the grid-shaped particle trap are respectively positioned on the same horizontal plane with the upper surface and the lower surface of the strip-shaped particle trap.
4. The method of claim 1, further comprising mounting a plurality of support legs beneath the strip particle trap for securing the strip particle trap.
5. The method of claim 1, wherein said fixedly contacting the strip particle trap with the grid-shaped particle trap comprises: welding the strip-shaped particle trap to the grid-shaped particle trap.
6. The method of claim 1, further comprising: setting the groove width of the grid type particle trap to be 8mm, the groove distance to be 5mm, the length to be 20cm and the central angle of a sector to be 60 degrees; the strip-shaped particle trap has a length of 20cm, a width of 3cm and a thickness of 3 mm.
7. The method of claim 1, further comprising: and placing the grid-shaped particle trap at a position which is symmetrical by taking the central axis tangent plane of the GIS/GIL as the center.
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