CN113092967A - Solid insulation medium and inorganic powder macroscopic interface creeping discharge test system - Google Patents
Solid insulation medium and inorganic powder macroscopic interface creeping discharge test system Download PDFInfo
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- CN113092967A CN113092967A CN202110391544.5A CN202110391544A CN113092967A CN 113092967 A CN113092967 A CN 113092967A CN 202110391544 A CN202110391544 A CN 202110391544A CN 113092967 A CN113092967 A CN 113092967A
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- inorganic powder
- creeping discharge
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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
Abstract
A test system for creeping discharge on a macroscopic interface of a solid insulating medium and inorganic powder belongs to the field of high-voltage insulation research. The invention aims to research the creeping discharge characteristic of a macroscopic interface of a solid insulating medium and inorganic powder; the invention is composed of an electrode system, an experimental cavity and an inflating and pressurizing device, wherein a high-voltage electrode and a grounding electrode of the electrode system are fixed on a lower cover of the experimental cavity through bolts and are used as test electrodes of the experiment; the experimental cavity is formed by connecting and fixing an upper cover, a lower cover and a tank body through a long bolt and serves as an experimental container; the inflatable air bag of the inflatable pressurizing device is arranged at the upper side of the inner part of the experimental cavity, and the hose penetrates through the side wall of the tank body to be connected with the inflating device and is used for providing different pressures for the inorganic powder to change the stacking state of the inorganic powder; the invention can research the creeping discharge characteristics of inorganic powder and solid insulating medium in different types, different grain diameters and different stacking states under the AC and DC conditions.
Description
Technical Field
The invention relates to the field of electrical insulation testing, in particular to a system for testing creeping discharge of a macroscopic interface of a solid insulation medium and inorganic powder.
Background
Gas insulated metal enclosed transmission lines (GIL) have been increasingly used in the field of high capacity, long distance transmission as a possible replacement for overhead lines, power cables and wall bushings, with conventional GIL using SF6Cost too much exists as an insulating mediumHigh content of decomposition products, damage to equipment and people, certain requirements on working environment, harm to environment and the like, and the inorganic powder has good insulating property and heat-conducting property and can replace SF6The material of gas, inorganic powder Insulated Pipe (IPIL) is a new concept proposed by the professor's theme in Lizhou Zhonghua at Harbin Ringzhu university, that is, inorganic powder is used to replace part or all of SF6A gas.
Through a great deal of previous researches, it has been found that discharge always occurs at a GIL gas-solid interface, and a creeping discharge voltage value is much lower than a breakdown voltage and is one of the weakest links of insulation of electric equipment. Such flashover arcs can cause non-self-healing damage to the insulator surface. However, the insulating medium is usually in a flashover state at any time for a long time, which causes the insulating property of the insulating material to be damaged at any time, further threatens the power grid to cause power failure or instrument damage, and the same problem exists in the IPIL, so that it is necessary to research the surface discharge characteristic mechanism of the macroscopic interface of the solid insulating medium and the inorganic powder.
Different from the traditional research on the creeping discharge characteristic of a gas-solid interface and the application of the creeping discharge characteristic in the corresponding field, the solid insulating medium and inorganic powder macroscopic interface creeping discharge testing system provided by the invention is used for researching the creeping discharge characteristic of the macroscopic interface of inorganic powder and solid insulating medium in different types, different particle sizes and different stacking states.
Disclosure of Invention
In order to solve the problems in the prior art and research the creeping discharge characteristic of the macroscopic interface of the solid insulating medium and the inorganic powder, the application provides a creeping discharge test system for the macroscopic interface of the solid insulating medium and the inorganic powder.
The invention discloses a system for testing creeping discharge of a macroscopic interface of a solid insulating medium and inorganic powder, which comprises an experiment cavity, an electrode system and an inflating and pressurizing device.
The invention provides a system for testing the creeping discharge of a macroscopic interface of a solid insulating medium and inorganic powder, which is characterized in that a solid insulating medium sample is tightly pressed under a high-voltage electrode and a grounding electrode, the electrode is fixed on a lower cover of an experimental cavity through a bolt to form an electrode testing system, then the inorganic powder is added into the experimental cavity, an upper cover, a gasket, a tank body and the lower cover are fixedly connected through a long bolt, and then the change of the external pressure of the inorganic powder is realized through an inflating and pressurizing device which is formed by matching an air bag, an air pipe and an inflating device, so that the stacking state of the inorganic powder is changed.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention can research the creeping discharge characteristic of the macroscopic interface of the solid insulating medium and the inorganic powder.
2) The invention can change the stacking state of the inorganic powder through the inflating and pressurizing device, and can study the influence of the inorganic powder in different stacking states on the creeping discharge characteristic of a macroscopic interface.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of a system for testing creeping discharge of a macroscopic interface between a solid insulating medium and inorganic powder;
FIG. 2 is a top cover of the laboratory chamber;
FIG. 3 is a lower lid of the laboratory chamber;
FIG. 4 is a top view of an electrode system;
FIG. 5 is a top view of the gasket;
FIG. 6 is a top view of the can body;
in the figure: 1. the electrode positioning hole is an upper cover, 2 is a gasket, 3 is a tank body, 4 is a short bolt, 5 is a grounding electrode, 6 is a lower cover, 7 is a high-voltage electrode, 8 is an air pipe, 9 is an air bag, 10 is a long bolt, 11 is a positioning hole, 12 is a through hole, and 13 is an electrode positioning hole.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in the figure, the system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder in this embodiment includes: the experimental cavity is used as an experimental container for containing inorganic powder; the electrode system is used for testing the creeping discharge characteristic; the inflation and pressurization device is used for providing pressures with different sizes for the inorganic powder and changing the stacking state of the inorganic powder, and the specific operation is as follows:
1) before voltage is applied, a solid insulating medium sample is tightly pressed between the electrodes 5 and 7 and the experiment cavity lower cover 6, and the solid insulating medium sample passes through the matched positioning hole 11 and the electrode positioning hole 13 through the bolt 4 to realize tight connection;
2) after the step 1), connecting and fixing a lower cover 6, a gasket 2 and a tank body 3 of the experimental cavity through a matched through hole 12 by a bolt 10 to form a container capable of containing inorganic powder;
3) after the step 2) is finished, uniformly spreading and pouring the selected inorganic powder into an experimental cavity, covering the upper cover 1 and screwing the bolt 10 to form a closed experimental cavity;
4) after the step 3) is finished, inflating the air bag 9 through the air pipe 8 by using an inflating device, applying external pressure to the inorganic powder, and changing the stacking state of the inorganic powder;
5) after the step 4) is completed, gradually increasing the voltage applied to the sample until creeping discharge occurs, and recording the magnitude of the creeping discharge voltage through a universal meter;
6) according to the result obtained in the step 5), how different powders, different particle sizes, different stacking states and different powder (different materials and different particle sizes) are compounded to influence the creeping discharge characteristic of the macroscopic interface between the solid insulating medium and the inorganic powder is analyzed, and a mechanism for analyzing the creeping discharge characteristic of the macroscopic interface between the solid insulating medium and the inorganic powder is discussed.
Finally, it is noted that the foregoing description of the embodiments of the invention has been presented for the purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and their practical applications, to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. It is, therefore, to be understood that the invention is intended to cover all modifications and equivalents within the scope of the following claims.
Claims (9)
1. A solid insulation medium and inorganic powder macroscopical interface creeping discharge test system which characterized in that: including experiment chamber, electrode system and inflation pressure device, wherein the experiment chamber mainly comprises upper cover, lower cover, gasket, jar body and passes the through-hole that matches on upper cover, lower cover, gasket, the jar body through long bolt and connects fixedly, electrode system passes the locating hole that matches under cover and fixes at the experiment chamber lower cover that connects high-voltage electrode, telluric electricity field and the experiment chamber by connecing high-voltage electrode and telluric electricity field to constitute and pass through short bolt, connect high-voltage electrode with interval is 5mm between the telluric electricity field, inflation pressure device comprises gasbag, trachea and the device of inflating.
2. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the material of the upper cover, the lower cover and the tank body of the experimental cavity is 3240 epoxy resin.
3. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the gasket and the air bag are made of rubber.
4. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the electrode system is made of red copper.
5. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: matched through holes are formed in the upper cover, the lower cover, the gasket and the tank body of the experimental cavity; and the high-voltage electrode, the grounding electrode and the lower cover of the experimental cavity are provided with matched positioning holes.
6. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the upper cover, the lower cover, the gasket and the tank body of the experimental cavity are fixedly connected through long bolts.
7. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the electrode system comprises two electrode structures, namely a high-voltage electrode and a grounding electrode.
8. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the high-voltage electrode and the grounding electrode of the electrode system are fixedly connected with the lower cover of the experimental cavity through short bolts.
9. The system for testing the creeping discharge of the macroscopic interface between the solid insulating medium and the inorganic powder according to claim 1, wherein: the air bag of the inflating and pressurizing device is arranged on the upper side of the inner part of the experimental cavity and used for providing different pressures for the inorganic powder and changing the stacking state of the inorganic powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110391544.5A CN113092967A (en) | 2021-04-12 | 2021-04-12 | Solid insulation medium and inorganic powder macroscopic interface creeping discharge test system |
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| CN202110391544.5A CN113092967A (en) | 2021-04-12 | 2021-04-12 | Solid insulation medium and inorganic powder macroscopic interface creeping discharge test system |
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| CN113092967A true CN113092967A (en) | 2021-07-09 |
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| CN102313864A (en) * | 2010-06-02 | 2012-01-11 | 富士电机株式会社 | Testing apparatus and method of testing |
| CN104698349A (en) * | 2015-01-16 | 2015-06-10 | 广东电网有限责任公司电力科学研究院 | Paper oil insulation partial discharge test device |
| CN104764982A (en) * | 2014-12-01 | 2015-07-08 | 吉林省电力科学研究院有限公司 | Device for insulating material surface flashover experiment and using method thereof |
| CN108918977A (en) * | 2018-05-02 | 2018-11-30 | 沈阳工业大学 | Dielectric gas-solid interface flashover property measuring device and method under a kind of cryogenic conditions |
| CN109254233A (en) * | 2018-10-24 | 2019-01-22 | 国网山东省电力公司电力科学研究院 | A kind of transformer electric fault gas simulator |
| CN109406973A (en) * | 2018-12-12 | 2019-03-01 | 国家电网有限公司 | It is a kind of to simulate under different defects along the device of face arcing fault |
| CN110618363A (en) * | 2019-11-01 | 2019-12-27 | 云南电网有限责任公司电力科学研究院 | GIS/GIL insulation flashover voltage waveform measuring platform |
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2021
- 2021-04-12 CN CN202110391544.5A patent/CN113092967A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313864A (en) * | 2010-06-02 | 2012-01-11 | 富士电机株式会社 | Testing apparatus and method of testing |
| CN104764982A (en) * | 2014-12-01 | 2015-07-08 | 吉林省电力科学研究院有限公司 | Device for insulating material surface flashover experiment and using method thereof |
| CN104698349A (en) * | 2015-01-16 | 2015-06-10 | 广东电网有限责任公司电力科学研究院 | Paper oil insulation partial discharge test device |
| CN108918977A (en) * | 2018-05-02 | 2018-11-30 | 沈阳工业大学 | Dielectric gas-solid interface flashover property measuring device and method under a kind of cryogenic conditions |
| CN109254233A (en) * | 2018-10-24 | 2019-01-22 | 国网山东省电力公司电力科学研究院 | A kind of transformer electric fault gas simulator |
| CN109406973A (en) * | 2018-12-12 | 2019-03-01 | 国家电网有限公司 | It is a kind of to simulate under different defects along the device of face arcing fault |
| CN110618363A (en) * | 2019-11-01 | 2019-12-27 | 云南电网有限责任公司电力科学研究院 | GIS/GIL insulation flashover voltage waveform measuring platform |
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