CN107449997B - Ring main unit defect model simulation device - Google Patents
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- CN107449997B CN107449997B CN201710943220.1A CN201710943220A CN107449997B CN 107449997 B CN107449997 B CN 107449997B CN 201710943220 A CN201710943220 A CN 201710943220A CN 107449997 B CN107449997 B CN 107449997B
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- 230000007547 defect Effects 0.000 title claims abstract description 144
- 238000004088 simulation Methods 0.000 title claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000012212 insulator Substances 0.000 claims description 47
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 239000010935 stainless steel Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000002923 metal particle Substances 0.000 claims description 15
- 239000003822 epoxy resin Substances 0.000 claims description 14
- 229920000647 polyepoxide Polymers 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a ring main unit defect model simulation device, which solves the technical problem that in the prior art, a defect model constructed for different defect models in a ring main unit is not available by constructing a discharge sealing air chamber containing an insulation defect model and electrifying the insulation defect model through a ground electrode rod and a positive electrode rod.
Description
Technical Field
The invention relates to the field of partial discharge tests, in particular to a ring main unit defect model simulation device.
Background
The ring main unit using SF6 gas as an insulating medium is widely applied to 10kV distribution network switch cabinet equipment, but various insulating defects, such as metal burrs on conductors, loose parts or poor contact, air gaps formed by stripping conductors and supporting insulators, residual substances after maintenance, metal particles in cavities and the like, are inevitably generated in the ring main unit in the processes of manufacturing, transporting, installing, overhauling, operating and the like, and can cause the inside of the ring main unit using SF6 gas as the insulating medium to form insulating defects of different degrees, so that the electric field in the switch cabinet is distorted, the safety accidents are finally caused due to the dielectric breakdown in the switch cabinet, and huge economic loss is brought to power generation enterprises.
The characteristic of partial discharge caused by different types of insulation defects is obviously different, so that the decomposition characteristic of SF6 under the partial discharge action of different types of insulation defects is also obviously different, and the property and the characteristic of the type of the insulation defects in the SF6 ring main unit can be more accurately known and mastered by establishing different insulation defect models aiming at the ring main unit, and further tracking and detecting the gas components, the content and the change rule of the insulation gas in the SF6 ring main unit.
In the prior art, a defect model constructed for different defect models in a ring main unit does not exist, so that the ring main unit defect model simulation device for researching the decomposition characteristics of SF6 under the partial discharge action of different types of insulation defects is provided, and the technical problem to be solved by the person skilled in the art is provided.
Disclosure of Invention
The invention provides a ring main unit defect model simulation device, which is used for researching the decomposition characteristics of SF6 under the partial discharge action of different types of insulation defects.
The invention provides a ring main unit defect model simulation device, which comprises:
a discharge sealing gas chamber and an insulation defect model arranged in the discharge sealing gas chamber;
the discharge sealing gas chamber includes: the device comprises a disc base, an outer wall of an air chamber, a disc top seat, a ground electrode rod and a positive electrode rod;
the disc base, the outer wall of the air chamber and the disc top seat are sequentially and fixedly connected;
the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod, the ground electrode rod is fixedly connected with the disc base, the second power receiving side of the insulation defect model is fixedly connected with the positive electrode rod, and the positive electrode rod penetrates through the disc top base and is electrically connected with an external power supply.
Preferably, the insulation defect model is: an insulator air gap defect model;
the insulator air gap defect model comprises a cylindrical insulator and a plate electrode;
the first round surface of the cylindrical insulator is the first power receiving side of the insulation defect model;
the first side of the plate electrode is measured as a second power receiving side of the insulation defect model;
a gap is arranged between the second circular surface of the cylindrical insulator and a second side of the plate electrode opposite to the first side of the plate electrode;
the center of the second circular surface of the cylindrical insulator is concave.
Preferably, the insulation defect model is: a free metal particle defect model;
the free metal particle defect model includes: ball-bowl electrodes and free metal particles;
the ball-bowl electrode includes: ball electrodes and bowl electrodes;
the outer surface of the bowl electrode is a first power receiving side of the insulation defect model;
the outer surface of the ball electrode is a second power receiving side of the insulation defect model;
the free metal particles are disposed within the bowl electrode.
Preferably, the insulation defect model is: a metal pollution defect model on the surface of the insulator;
the insulator surface metal pollution defect model comprises the following components: the cylindrical epoxy resin insulator comprises a cylindrical epoxy resin insulator and at least one rectangular copper chip, wherein at least one rectangular copper chip is fixedly connected with the curved side surface of the cylindrical epoxy resin insulator;
the first round surface of the cylindrical epoxy resin insulator is the first power receiving side of the insulation defect model;
the second circular surface of the cylindrical epoxy insulator is the second powered side of the insulation defect model.
Preferably, the insulation defect model is: a solid metal defect model;
the solid metal object defect model is a needle-plate electrode, and the needle-plate electrode comprises a needle electrode and a plate electrode;
the plate electrode is a first power receiving side of the insulation defect model;
the pin electrode is the second powered side of the insulation defect model.
Preferably, the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod, and the method comprises the following steps:
the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod through threads.
Preferably, the outer wall of the air chamber is specifically: a hollow cylinder;
the disc base and the disc top seat are provided with grooves matched with the bottom surface cylindrical rings of the hollow cylinders.
Preferably, the disc base is provided with an air inlet, an air outlet and an air pressure test port;
the air inlet is in sealing connection with the first conversion valve, the air outlet is in sealing connection with the second conversion valve, and the air pressure test port is in sealing connection with the air pressure meter.
Preferably, the device further comprises at least one support rod;
at least one supporting rod is vertically and fixedly connected between the disc base and the disc top seat and used for supporting the disc top seat.
Preferably, the disc base, the outer wall of the air chamber and the disc top seat are sequentially and fixedly connected, and comprise:
the disc base, the outer wall of the air chamber and the disc top seat are fixedly connected through a flange system.
From the above technical scheme, the invention has the following advantages:
the invention provides a ring main unit defect model simulation device, which comprises: a discharge sealing gas chamber and an insulation defect model arranged in the discharge sealing gas chamber; the discharge sealing gas chamber includes: the device comprises a disc base, an outer wall of an air chamber, a disc top seat, a ground electrode rod and a positive electrode rod; the disc base, the outer wall of the air chamber and the disc top seat are sequentially and fixedly connected; the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod, the ground electrode rod is fixedly connected with the disc base, the second power receiving side of the insulation defect model is fixedly connected with the positive electrode rod, and the positive electrode rod penetrates through the disc top base and is electrically connected with an external power supply.
According to the invention, the technical problem that the defect model built aiming at different defect models in the ring main unit is not available in the prior art is solved by constructing the discharge sealing air chamber containing the insulation defect model and electrifying the insulation defect model through the ground electrode rod and the positive electrode rod.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating an embodiment of a ring main unit defect model simulation device according to the present invention;
FIG. 2 is a schematic diagram of another embodiment of a ring main unit defect model simulation device according to the present invention;
FIG. 3 is a schematic diagram of another embodiment of a ring main unit defect model simulation device according to the present invention;
FIG. 4 is a schematic diagram of another embodiment of a ring main unit defect model simulation device according to the present invention;
fig. 5 is a schematic structural diagram of another embodiment of a ring main unit defect model simulation device provided by the present invention.
Detailed Description
The embodiment of the invention provides a ring main unit defect model simulation device which is used for solving the technical problem that a defect model constructed aiming at different defect models in a ring main unit does not exist in the prior art.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of a ring main unit defect model simulation device provided by the present invention includes:
a discharge seal gas chamber 101 and an insulation defect model 102 provided in the discharge seal gas chamber;
the discharge sealing gas chamber includes: disc base 103, air chamber outer wall 104, disc top base 105, ground electrode rod 106 and positive electrode rod 107;
it should be noted that, in the actual implementation process, the disc base 103 may be made of stainless steel, in order to support the circular base on a plane, a support frame may be additionally provided, the support frame is made of four solid stainless steel rods and square steel rings welded externally, in order to maintain stability, four support discs with diameters larger than those of the stainless steel rods may be connected to the bottoms of the four stainless steel rods, so as to form a support with the ground, and the disc base 103 is located at the upper part of the support frame;
the dome 105 may be formed of epoxy.
The disc base 103, the air chamber outer wall 104 and the disc top base 105 are fixedly connected in sequence;
the combined air chamber has a cylinder overall structure, and can meet the technical requirements of bearing the air pressure of 0 to 0.2Mpa and no air leakage for 96 hours.
The first power receiving side of the insulation defect model 102 is fixedly connected with the ground electrode rod 106, the ground electrode rod 106 is fixedly connected with the disc base 103, the second power receiving side of the insulation defect model 102 is fixedly connected with the positive electrode rod 107, and the positive electrode rod 107 penetrates through the disc top base 105 and is electrically connected with an external power supply.
It should be noted that, a copper guide rod may be selected as the ground electrode rod 106, and the positional relationship between the ground electrode rod 106 and the disc top seat 105 may be selected in the specific implementation, which is not limited herein;
in the practical implementation process, a central round hole can be dug out at the center of the disc top seat 105 and used as an extending hole of the positive electrode rod 107, the positive electrode rod 107 can be formed by combining a positive electrode cylinder and a copper rod, further, threads are engraved at the bottom of the copper rod and used for being connected with the insulation defect model 102, threads are engraved at the top of the copper rod and used for being electrically connected with the bottom of the positive electrode cylinder to realize adjustment of electrode distance, threaded holes are engraved at the center of the positive electrode cylinder and used for being connected with a guide rod at the top of the copper rod in a threaded manner, the positive electrode cylinder extends in through the central round hole of the disc top seat 105, and further, an epoxy resin circular ring matched with the positive electrode cylinder can be arranged at the outer side of the discharge sealing air chamber 101 and used for fixing the positive electrode cylinder.
The ring main unit defect model simulation device provided by the embodiment of the invention comprises: a discharge seal gas chamber 101 and an insulation defect model 102 provided in the discharge seal gas chamber 101; the discharge seal gas chamber 101 includes: disc base 103, air chamber outer wall 104, disc top base 105, ground electrode rod 106 and positive electrode rod 107; the disc base 103, the air chamber outer wall 104 and the disc top base 105 are fixedly connected in sequence; the first power receiving side of the insulation defect model 102 is fixedly connected with the ground electrode rod 106, the ground electrode rod 106 is fixedly connected with the disc base 103, the second power receiving side of the insulation defect model 102 is fixedly connected with the positive electrode rod 107, the positive electrode rod 107 penetrates through the disc top base 105 and is electrically connected with an external power supply, the insulation defect model 102 is electrified through the ground electrode rod 106 and the positive electrode rod 107 by constructing the discharge sealing air chamber 101 containing the insulation defect model 102, and the technical problem that no defect model is constructed for different defect models in a ring main unit in the prior art is solved.
The foregoing is a description of one embodiment of a ring main unit defect model simulation device, and another embodiment of a ring main unit defect model simulation device will be described in detail.
Another embodiment of the present invention provides a ring main unit defect model simulation device, including:
a discharge seal gas chamber 101 and an insulation defect model 102 provided in the discharge seal gas chamber 101;
the discharge seal gas chamber 101 includes: disc base 103, air chamber outer wall 104, disc top base 105, ground electrode rod 106 and positive electrode rod 107;
the disc base 103, the air chamber outer wall 104 and the disc top base 105 are fixedly connected through a flange system;
it should be noted that 12 circular holes may be evenly distributed in the disc base 103 and the disc top base 105, and the flange sealing system for being engaged with the sealing flange system may be composed of a stainless steel ring, a stainless steel rod, a nut, and a gasket, where the stainless steel ring evenly distributes 12 circular holes in a designated area; after 12 stainless steel rod bodies are carved with threads and sequentially pass through the round holes of the stainless steel ring, the round holes of the disc top seat 105 and the round holes of the disc base 103, the air tightness of the air chamber is controlled by tightly connecting 24 nuts and gaskets matched with the round holes and adjusting the positions of the stainless steel rods where the nuts are positioned.
The first power receiving side of the insulation defect model 102 is fixedly connected with the ground electrode rod 106, the ground electrode rod 106 is fixedly connected with the disc base 103, the second power receiving side of the insulation defect model 102 is fixedly connected with the positive electrode rod 107, and the positive electrode rod 107 penetrates through the disc top base 105 and is electrically connected with an external power supply.
Further, the insulation defect model 102 is: an insulator air gap defect model;
the insulator air gap defect model includes a cylindrical insulator 201 and a plate electrode 202;
the first circular surface of the cylindrical insulator 201 is the first power receiving side of the insulation defect model 102;
the first power receiving side of the plate electrode 202 is the second power receiving side of the insulation defect model 102;
a gap is provided between the second circular surface of the cylindrical insulator 201 and the other side of the plate electrode 202 opposite to the first power receiving side of the plate electrode 202;
the center of the second circular surface of the cylindrical insulator 201 is concave;
referring to fig. 2, fig. 2 is a schematic structural diagram of an insulator air gap defect model of a ring main unit defect model simulation device provided by the embodiment of the invention, wherein a cylindrical insulator 201 and a ground electrode rod 106 are tightly connected by adopting epoxy resin glue, so that no gap or bubble exists before the cylindrical insulator 201 and the ground electrode rod 106, and further, the air gap size at the junction between a plate electrode 202 and the upper surface of the cylindrical insulator 201 is about 1-2 mm, in order to reflect the actual air gap situation, the center of the second circular surface of the cylindrical insulator 201 is concave, and the edge of the air gap is arc-shaped.
Further, the insulation defect model 102 is: a free metal particle defect model;
the free metal particle defect model includes: ball-bowl electrode and free metal particles 303;
the ball-bowl electrode includes: a ball electrode 301 and a bowl electrode 302;
the outer surface of the bowl electrode 302 is the first power receiving side of the insulation defect model 102;
the outer surface of the ball electrode 301 is the second power receiving side of the insulation defect model 102;
the free metal particles 303 are disposed within the bowl electrode.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a defect model of free metal particles 303 in a ring main unit defect model simulation device provided by the embodiment of the invention, further, the diameter ratio of a ball electrode 301 to a bowl electrode 302 is about 1:2.7, the bowl electrode 302 can be obtained by cutting a stainless steel hollow sphere in a half proportion, further, the free metal particles 303 can be simulated by adopting tiny-sized aluminum scraps, wherein the aluminum scraps are approximately square, the size is about 1×1mm, and the number of the aluminum scraps is 50 to 200, and considering that the aluminum scraps can generate irregular jitter under the action of a strong electric field, in order to ensure the normal and continuous development of the experiment, the diameter of the bowl electrode 302 is set to 120mm, the diameter of the ball electrode 301 is set to 44mm, and the maximum jitter range of the particles can be up to 40mm.
Further, the insulation defect model 102 is: a metal pollution defect model on the surface of the insulator;
the insulator surface metal pollution defect model comprises: the cylindrical epoxy resin insulator 401, at least one rectangular copper chip 402 is fixedly connected with the curved side surface of the cylindrical epoxy resin insulator 401;
the first circular surface 403 of the cylindrical epoxy insulator is the first powered side of the insulation defect model 102;
the second circular surface 404 of the cylindrical epoxy insulator is the second powered side of the insulation defect model 102;
referring to fig. 4, fig. 4 is a schematic structural diagram of an insulator surface metal pollution defect model of a ring main unit defect model simulation device provided by the embodiment of the present invention, and further, the insulator surface metal pollution defect model adopts epoxy resin glue to tightly adhere a first circular surface 403 of a cylindrical epoxy resin insulator 401 to a ground electrode rod 106, and a second circular surface 404 is tightly adhered to a positive electrode rod 107, so as to ensure that no gap or bubble exists at the adhesion position.
Further, the insulation defect model 102 is: a solid metal defect model;
the solid metal defect model is a needle-plate electrode, which comprises a needle electrode 501 and a plate electrode 502;
the plate electrode 502 is the first powered side of the insulation defect model 502;
the needle electrode 501 is the second power receiving side of the insulation defect model 501;
referring to fig. 5, fig. 5 is a schematic structural diagram of a solid metal object defect model of a ring main unit defect model simulation device provided by the embodiment of the invention, the radius of curvature of the tip end of a needle electrode 501 is about 0.3mm, the taper angle is about 30 °, the materials of the needle electrode 501 and a plate electrode 502 are all stainless steel, the surfaces of the electrodes are subjected to good polishing treatment, the needle electrode 501 is used for simulating abnormal protruding points on a high-voltage conductor, and the plate electrode 502 is used for simulating a metal shell of a switch cabinet.
The disc base 103 is provided with an air inlet, an air outlet and an air pressure test port;
the air inlet is in sealing connection with the first conversion valve, the air outlet is in sealing connection with the second conversion valve, and the air pressure test port is in sealing connection with the air pressure meter;
in the practical implementation process, the air inlet, the air outlet and the air pressure test port can be respectively welded with three stainless steel pipes, one of the three stainless steel pipes is in sealing connection with the air pressure meter and used for measuring the air pressure in the range of 0 to 0.2Mpa, and the other two stainless steel pipes are in sealing connection with the conversion valve and used for extracting and injecting experimental air.
Further, the ring main unit defect model simulation device further comprises at least one supporting rod;
at least one support bar is vertically and fixedly connected between the disc base 103 and the disc top base 105 for supporting the disc top base 105.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the above-described method and module may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. Ring main unit defect model simulation device, characterized by, include:
a discharge sealing gas chamber and an insulation defect model arranged in the discharge sealing gas chamber;
the discharge sealing gas chamber includes: the device comprises a disc base, an outer wall of an air chamber, a disc top seat, a ground electrode rod and a positive electrode rod;
the disc base, the outer wall of the air chamber and the disc top seat are sequentially and fixedly connected;
the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod, the ground electrode rod is fixedly connected with the disc base, the second power receiving side of the insulation defect model is fixedly connected with the positive electrode rod, and the positive electrode rod penetrates through the disc top base and is electrically connected with an external power supply;
the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod, and the first power receiving side of the insulation defect model comprises:
the first power receiving side of the insulation defect model is fixedly connected with the ground electrode rod through threads;
the outer wall of the air chamber is specifically: a hollow cylinder;
the disc base and the disc top seat are respectively provided with a groove matched with the bottom surface cylindrical ring of the hollow cylinder;
the disc base is provided with an air inlet, an air outlet and an air pressure test port;
the air inlet is in sealing connection with the first conversion valve, the air outlet is in sealing connection with the second conversion valve, and the air pressure test port is in sealing connection with the air pressure meter;
the device further comprises at least one support bar;
at least one supporting rod is vertically and fixedly connected between the disc base and the disc top seat and used for supporting the disc top seat;
the disc base comprises stainless steel, and in the actual implementation process, in order to support the circular base on the plane, a supporting frame is arranged, the supporting frame comprises four solid stainless steel bars and square steel rings welded outside, for keeping stability, four supporting discs with diameters larger than those of the stainless steel bars are connected to the bottoms of the four stainless steel bars, so that the support with the ground is formed, and the disc base is positioned on the upper portion of the supporting frame.
2. The ring main unit defect model simulation device according to claim 1, wherein the insulation defect model is: an insulator air gap defect model;
the insulator air gap defect model comprises a cylindrical insulator and a plate electrode;
the first round surface of the cylindrical insulator is the first power receiving side of the insulation defect model;
the first side of the plate electrode is measured as a second power receiving side of the insulation defect model;
a gap is arranged between the second circular surface of the cylindrical insulator and a second side of the plate electrode opposite to the first side of the plate electrode;
the center of the second circular surface of the cylindrical insulator is concave.
3. The ring main unit defect model simulation device according to claim 1, wherein the insulation defect model is: a free metal particle defect model;
the free metal particle defect model includes: ball-bowl electrodes and free metal particles;
the ball-bowl electrode includes: ball electrodes and bowl electrodes;
the outer surface of the bowl electrode is a first power receiving side of the insulation defect model;
the outer surface of the ball electrode is a second power receiving side of the insulation defect model;
the free metal particles are disposed within the bowl electrode.
4. The ring main unit defect model simulation device according to claim 1, wherein the insulation defect model is: a metal pollution defect model on the surface of the insulator;
the insulator surface metal pollution defect model comprises the following components: the cylindrical epoxy resin insulator comprises a cylindrical epoxy resin insulator and at least one rectangular copper chip, wherein at least one rectangular copper chip is fixedly connected with the curved side surface of the cylindrical epoxy resin insulator;
the first round surface of the cylindrical epoxy resin insulator is the first power receiving side of the insulation defect model;
the second circular surface of the cylindrical epoxy insulator is the second powered side of the insulation defect model.
5. The ring main unit defect model simulation device according to claim 1, wherein the insulation defect model is: a solid metal defect model;
the solid metal object defect model is a needle-plate electrode, and the needle-plate electrode comprises a needle electrode and a plate electrode;
the plate electrode is a first power receiving side of the insulation defect model;
the pin electrode is the second powered side of the insulation defect model.
6. The ring main unit defect model simulation device according to any one of claims 1 to 5, wherein the disc base, the air chamber outer wall and the disc top base are sequentially and fixedly connected, and the ring main unit defect model simulation device comprises:
the disc base, the outer wall of the air chamber and the disc top seat are fixedly connected through a flange system.
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| CN108490319A (en) * | 2018-03-21 | 2018-09-04 | 广东电网有限责任公司电力科学研究院 | A kind of GIS defects of insulator model and test SF6The method of decomposition product |
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