CN110749806A - 110kV cable GIS terminal voltage withstand test system capable of restoring actual working state - Google Patents
110kV cable GIS terminal voltage withstand test system capable of restoring actual working state Download PDFInfo
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- CN110749806A CN110749806A CN201910921749.2A CN201910921749A CN110749806A CN 110749806 A CN110749806 A CN 110749806A CN 201910921749 A CN201910921749 A CN 201910921749A CN 110749806 A CN110749806 A CN 110749806A
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- terminal
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- shielding cylinder
- shielding
- clamping ring
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004088 simulation Methods 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 229910018503 SF6 Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G01R31/1272—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 cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- 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
- G01R31/1254—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 gas-insulated power appliances or vacuum gaps
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a 110kV cable GIS terminal withstand voltage test system capable of restoring an actual working state, wherein two ends of a cable are respectively connected with a cable terminal, one end of the cable terminal is connected with a pressurizing device, the other end of the cable terminal is connected with a gas switch simulation device, the gas switch simulation device comprises a second shielding cylinder and a second terminal clamping ring, the other end of the cable terminal is inserted into the second shielding cylinder, the head of the second shielding cylinder is covered with a shielding cover, the head of the second shielding cylinder is provided with a second positioning clamping ring matched with one end of an upper flange of the cable terminal, the second terminal clamping ring is connected with the second positioning clamping ring through a third bolt, the second terminal clamping ring compresses the other end of the upper flange of the cable terminal, and nitrogen is filled in the second shielding cylinder. The invention makes the pressure test simpler, and the gas switch simulator can replace a gas switch to carry out the voltage test, thereby greatly improving the working efficiency.
Description
Technical Field
The invention relates to a high-voltage cable terminal test device.
Background
Because the electric field stress concentration of the tail end of the cable, the cable can not be directly electrified to test after being laid, the problem is solved at present in the form of a water terminal, the cable is firstly processed and penetrates into the water terminal, and the voltage is electrified to test the top of the water terminal.
The water terminal is adopted, the cable treatment is long, the 110kV is about 2 meters, the 220kV is about 3 meters, the water terminal is large, the field test is inconvenient, an external water treatment device is needed, the complex field environment is not suitable, and the water terminal needs to provide deionized water and a continuous power supply as power in the operation process.
Meanwhile, the cable terminal at the other end of the cable is connected with a gas switch (so as to restore the actual working state). Because the external electric field strength of the cable terminal is higher, after the installation is finished, the cable terminal cannot be exposed in the air and directly subjected to voltage application for testing, at present, sulfur hexafluoride gas in the gas switch is firstly discharged, a cover plate at the bottom of the gas switch is opened, a connecting fitting at the top of the switch is dismantled, then the cable terminal penetrates into the gas switch, the gas switch is vacuumized and filled with sulfur hexafluoride gas, and the voltage application test is carried out after the cable terminal needs to stand for a period of time.
Because the volume of the gas switch equipment is huge, the vacuumizing and inflating time is long, the period of a voltage application test is increased, and more equipment manufacturers need to be matched, so that the power transmission time is seriously influenced. Sulfur hexafluoride belongs to one of six greenhouse gases, and the discharged gas is harmful to human bodies and is not suitable for the current situation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a set of 110kV cable GIS terminal voltage withstand test system for restoring the actual working state, which is convenient to test, improves the efficiency, and avoids environmental pollution and personal safety harm caused by sulfur hexafluoride leakage.
In order to solve the technical problems, the invention adopts the following technical scheme: a110 kV cable GIS terminal withstand voltage test system capable of restoring an actual working state is characterized in that two ends of a cable are respectively connected with a cable terminal, one end of the cable terminal is connected with a pressurizing device, the other end of the cable terminal is connected with a gas switch simulation device, the pressurizing device comprises a first shielding cylinder, a shielding flange and a first terminal clamping ring, the head end of the first shielding cylinder is in butt joint with the shielding flange and is fixed by a first bolt, the head of the shielding flange is provided with a first positioning clamping ring matched with one end of an upper flange of the cable terminal, the first terminal clamping ring is connected with the first positioning clamping ring by a second bolt, the first terminal clamping ring compresses the other end of the upper flange of the cable terminal, a guide rod is installed on the cable terminal at one end of the cable terminal, the guide rod is connected with a lead rod, the lead rod is fixed at the tail end of the first shielding cylinder, and a pressurizing cavity is, the pressurized cavity is filled with nitrogen, the gas switch simulation device comprises a second shielding cylinder and a second terminal clamping ring, the other end of the cable terminal is inserted into the second shielding cylinder, the head of the second shielding cylinder is covered with a shielding cover, the head of the second shielding cylinder is provided with a second positioning clamping ring matched with one end of an upper flange of the cable terminal, the second terminal clamping ring is connected with the second positioning clamping ring through a third bolt, the second terminal clamping ring compresses the other end of the upper flange of the cable terminal, and the second shielding cylinder is filled with nitrogen.
Optionally, the first shielding cylinder is of a step cylinder structure with a large caliber at the head end and a small diameter at the tail end.
Optionally, the step of the first shielding cylinder is of an inclined surface transition structure.
Optionally, the tail end of the first shielding cylinder is provided with a guide hole, and the guide rod is inserted into the guide hole and fixed by a lead rod.
Optionally, the inner wall of the tail end of the first shielding cylinder is of a conical surface structure.
Optionally, the tail of the second shielding cylinder is connected with a guide seat, and the shielding cover is located in the guide seat.
The technical scheme adopted by the invention has the following beneficial effects:
1. the pressurization test is simpler, and the working efficiency is greatly improved. The long-term operation of the cable and the cable terminal is reliably guaranteed, compared with a water terminal, the water terminal is small in size, convenient to install, energy-saving and emission-reducing, the pressurizing device does not need frequent overhauling and maintenance, the risk of water leakage and electric shock does not exist, nitrogen is filled in the pressurizing device, and the environment and workers are not harmed.
2. The gas switch simulation device can replace a gas switch to carry out a voltage application test, and the working efficiency is greatly improved. The device provides reliable guarantee for the long-term operation of the cable and the cable terminal, and compared with the conventional gas switch test, the device has the advantages of small volume, convenient installation, no pollution of gas, no need of frequent overhaul and maintenance of the simulation device, and no risk of environment pollution and personal injury due to gas leakage because the inside of the simulation device is filled with nitrogen.
3. The shielding cylinder is designed in a step shape so as to reduce the internal volume and is controlled below the minimum requirement of the volume of the pressure vessel.
4. The cable and the cable terminal are centered through the guide seat, and the butt joint installation of the second terminal clamping ring and the third bolt is facilitated.
The following detailed description and the accompanying drawings are included to provide a further understanding of the invention.
Drawings
FIG. 1 is a schematic view of the structure of the pressurizing device of the present invention;
fig. 2 is a schematic structural diagram of the gas switch simulation device of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as the following "head," "tail," etc., which indicate an orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
Referring to fig. 1 and 2, in a 110kV cable gis terminal withstand voltage test system for restoring an actual working state, two ends of a cable 3 are respectively connected with a cable terminal 31, wherein one end of the cable terminal is connected with a pressurizing device 1, and the other end of the cable terminal is connected with a gas switch simulation device 2. Wherein, the pressurizing device 1 pressurizes the cable terminal, and the gas switch simulator 2 can simulate the gas switch in actual use.
Referring to fig. 1, a pressurizing device 1 includes a first shielding cylinder 12, a shielding flange 11, and a first terminal snap ring 14, a head end of the first shielding cylinder 12 is abutted to the shielding flange 11 and fixed by a first bolt 16, a head of the shielding flange 11 is provided with a first positioning snap ring 111 cooperating with one end of an upper flange 311 of a cable terminal, the first terminal snap ring 14 is connected to the first positioning snap ring 111 by a second bolt 15, the first terminal snap ring 14 compresses the other end of the upper flange of the cable terminal, a guide rod 32 is installed on a first cable terminal 31, the guide rod 32 is connected to a lead rod 13, the lead rod 13 is fixed at a tail end of the first shielding cylinder, a pressurizing cavity is formed between the first shielding cylinder 12 and the shielding flange 11, nitrogen gas is injected into the pressurizing cavity, and a corresponding gas filling port can be arranged on a side surface of the first shielding cylinder 12, for charging with nitrogen.
The first shielding cylinder 12 is a stepped cylinder structure with a large diameter at the head end and a small diameter at the tail end, and is provided with at least one step 121. The stepped design is adopted to reduce the internal volume and is controlled below the minimum volume requirement of the pressure vessel. One step, two steps or a plurality of steps can be made according to actual conditions.
Furthermore, the step of the first shielding cylinder adopts an inclined plane transition structure. And the inner wall of the tail end of the first shielding cylinder body is of a conical surface structure.
In order to fix the guide rod, a guide hole is formed at the tail end of the first shielding cylinder, and the guide rod 32 is inserted into the guide hole and fixed through the lead rod 13, which may be fixed by a threaded connection.
The first shielding cylinder 12 and the shielding flange 11 may be made of insulating materials, and the others may be made of metal.
After the cable 3 and the cable terminal 31 are installed, the guide rod 32 is installed on the cable terminal 31, the shielding flange 11 and the first shielding cylinder 12 are assembled by the first bolt 16, the cable terminal 31 penetrates into the shielding flange 11 and the first shielding cylinder 12, the first terminal snap ring 14 is fixed by the second bolt 15, the guide rod 32 is fixed on the first shielding cylinder 12 by the lead rod 13, and then nitrogen is injected into the pressurizing cavity to complete the whole installation process and the pressurizing test. Because the nitrogen is filled inside, the method is harmless to the environment and workers. And compared with the mode of adopting a water terminal, the whole test process does not need deionized water and a continuous power supply. The pressurization test is simpler, and the working efficiency is greatly improved.
Referring to fig. 2, the gas switch simulator 2 provides a sealed condition for cables and cable terminations. It includes second shielding barrel 21, second terminal snap ring 23, and other end cable terminal inserts second shielding barrel and head cover and is equipped with shield cover 33, the head of second shielding barrel be equipped with cable terminal upper flange 311's one end complex second location snap ring 211, second terminal snap ring adopts third bolt 24 with first location snap ring to be connected, second terminal snap ring 23 compresses tightly the cable terminal upper flange other end, it has nitrogen gas to fill in the second shielding barrel 21, can set up the interface of aerifing that corresponds to the side of second shielding barrel 21 for fill notes nitrogen gas.
Further, the tail of the second shielding cylinder is connected with a guide seat 22, and the shielding cover 33 is located in the guide seat. The cable and the cable termination are centered by the guide shoe.
The guide seat 22 is made of an insulating material, and the others may be made of metal.
After the cable and the cable terminal are installed, the shielding cover is installed on the cable terminal, the cable terminal penetrates into the second shielding cylinder body, the shielding cover is located at the center of the guide seat, then the bolt is screwed up to fix the terminal clamping ring, and then nitrogen gas is injected into the second shielding cylinder body to complete the whole installation process.
Therefore, when the gas switch simulation device is installed, the device is only required to be installed on a cable terminal, the installation bolt is screwed, nitrogen gas is directly injected, the whole installation process is completed, the pressurization test period is greatly shortened, and the nitrogen gas is an important component of air and has no harm to the environment and human bodies.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (6)
1. One set of 110kV cable GIS terminal withstand voltage test system who restores actual operating condition, a cable termination is connected respectively at the both ends of cable, and wherein one end cable termination connects pressure device, and other end cable termination connects gas switch analogue means, its characterized in that: the pressurizing device comprises a first shielding cylinder, a shielding flange and a first terminal clamping ring, the head end of the first shielding cylinder is in butt joint with the shielding flange and is fixed by a first bolt, the head of the shielding flange is provided with a first positioning clamping ring matched with one end of an upper flange of a cable terminal, the first terminal clamping ring is connected with the first positioning clamping ring by a second bolt, the first terminal clamping ring compresses the other end of the upper flange of the cable terminal, a guide rod is mounted on the cable terminal at one end and connected with a lead rod, the lead rod is fixed at the tail end of the first shielding cylinder, a pressurizing cavity is formed between the first shielding cylinder and the shielding flange, and nitrogen is filled in the pressurizing cavity; the gas switch simulation device comprises a second shielding cylinder body and a second terminal clamping ring, wherein a cable terminal at the other end is inserted into the second shielding cylinder body, the head of the second shielding cylinder body is covered with a shielding cover, the head of the second shielding cylinder body is provided with a second positioning clamping ring matched with one end of an upper flange of the cable terminal, the second terminal clamping ring is connected with the second positioning clamping ring through a third bolt, the second terminal clamping ring compresses the other end of the upper flange of the cable terminal, and nitrogen is filled in the second shielding cylinder body.
2. The set of 110kV cable GIS terminal voltage withstand test system for restoring actual working state according to claim 1, characterized in that: the first shielding cylinder is of a step cylinder structure with a large caliber at the head end and a small diameter at the tail end.
3. The set of 110kV cable GIS terminal voltage withstand test system for restoring actual working state according to claim 2, characterized in that: the step of the first shielding cylinder adopts an inclined plane transition structure.
4. The set of 110kV cable GIS terminal voltage withstand test system for restoring actual working state according to claim 1, characterized in that: the tail end of the first shielding cylinder body is provided with a guide hole, and the guide rod is inserted into the guide hole and fixed through a lead rod.
5. The set of 110kV cable GIS terminal voltage withstand test system for restoring actual working state according to claim 4, characterized in that: the inner wall of the tail end of the first shielding cylinder body is of a conical surface structure.
6. The set of 110kV cable GIS terminal voltage withstand test system for restoring actual working state according to claim 1, characterized in that: the tail of the second shielding cylinder is connected with a guide seat, and the shielding cover is located in the guide seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910921749.2A CN110749806B (en) | 2019-09-27 | 2019-09-27 | 110KV cable GIS terminal withstand voltage test system for restoring actual working state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910921749.2A CN110749806B (en) | 2019-09-27 | 2019-09-27 | 110KV cable GIS terminal withstand voltage test system for restoring actual working state |
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| Publication Number | Publication Date |
|---|---|
| CN110749806A true CN110749806A (en) | 2020-02-04 |
| CN110749806B CN110749806B (en) | 2024-08-13 |
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| CN201910921749.2A Active CN110749806B (en) | 2019-09-27 | 2019-09-27 | 110KV cable GIS terminal withstand voltage test system for restoring actual working state |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122400A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage testing system for power cable |
| CN103809085A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Junction device for cable high-voltage resistance test and cable high-voltage resistance test |
| CN103869225A (en) * | 2014-03-14 | 2014-06-18 | 国家电网公司 | Portable suspension insulator voltage insulation test system and voltage insulation test method thereof |
| CN211785884U (en) * | 2019-09-27 | 2020-10-27 | 浙江大有实业有限公司电缆工程分公司 | Make things convenient for withstand voltage test's 110kV cable GIS terminal insulation system |
-
2019
- 2019-09-27 CN CN201910921749.2A patent/CN110749806B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122400A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage testing system for power cable |
| CN103809085A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Junction device for cable high-voltage resistance test and cable high-voltage resistance test |
| CN103869225A (en) * | 2014-03-14 | 2014-06-18 | 国家电网公司 | Portable suspension insulator voltage insulation test system and voltage insulation test method thereof |
| CN211785884U (en) * | 2019-09-27 | 2020-10-27 | 浙江大有实业有限公司电缆工程分公司 | Make things convenient for withstand voltage test's 110kV cable GIS terminal insulation system |
Non-Patent Citations (1)
| Title |
|---|
| 何光华;吴寅雄;杨静泊;俞骏;: "SF_6气室终端电缆耐压试验装置研究", 江苏科技信息, no. 03, 30 January 2016 (2016-01-30) * |
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| CN110749806B (en) | 2024-08-13 |
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