CN113985268A - Intelligent equipment for insulation test of medium-voltage switchgear - Google Patents
Intelligent equipment for insulation test of medium-voltage switchgear Download PDFInfo
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- CN113985268A CN113985268A CN202111275838.8A CN202111275838A CN113985268A CN 113985268 A CN113985268 A CN 113985268A CN 202111275838 A CN202111275838 A CN 202111275838A CN 113985268 A CN113985268 A CN 113985268A
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- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000009413 insulation Methods 0.000 title claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009021 linear effect Effects 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention belongs to the technical field of high-voltage tests, and particularly relates to intelligent equipment for an insulation test of medium-voltage switchgear. The outer side terminal of the left wall bushing is used for connecting a test article terminal; the terminal at the inner side of the left wall bushing is provided with a switch contact which is used for connecting the left switch device, the lower grounding switch and the upper grounding switch; the right through-wall sleeve comprises a first right through-wall sleeve for connecting a power frequency test transformer, a second right through-wall sleeve for connecting a charging loop of an impulse voltage generator and a third right through-wall sleeve for connecting the impulse voltage generator and a measuring system of the impulse voltage generator, and the switching of power frequency lightning is realized, so that the power frequency test transformer can be used as a charging transformer of a lightning generator, the test equipment is saved, the equipment utilization rate is improved, the safety of personnel is guaranteed, and the requirement of intelligent construction of a medium-voltage switch equipment insulation test is met.
Description
Technical Field
The invention belongs to the technical field of high-voltage tests, and particularly relates to intelligent equipment for an insulation test of medium-voltage switchgear.
Background
Medium voltage switchgear is switchgear with a rated voltage of 3.6kV to 40.5kV, and its products are various, and are classified into circuit breakers, disconnectors, metal-enclosed switchgear, and the like according to the type of switch. Medium voltage switchgear is widely used in power distribution systems, railway systems, factory enterprises, and the like. The type test is performed to verify whether the product can meet all the requirements of the technical specification, and is an essential link in new product identification.
At present, medium voltage switchgear tests are mostly carried out according to GB/T3906-2020, GB/T11022-; in the traditional method, a power frequency test transformer and a complete lightning generator including a charging transformer are required to be used for testing, two sets of transformers are required to be arranged, and the power frequency test transformer is not fully utilized.
Disclosure of Invention
Aiming at the problem that the power frequency test transformer is not fully utilized in the traditional method, the invention provides intelligent equipment for the insulation test of medium-voltage switchgear.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides an intelligent equipment is used in medium voltage switchgear insulation test which characterized in that includes: the device comprises an external shell, a left wall bushing, a left switch device, a lower grounding switch, a right wall bushing, a right switch device and an upper grounding switch;
the left wall bushing and the right wall bushing are respectively arranged on two sides of the external shell, the left wall bushing comprises a first left wall bushing and a second left wall bushing, the first left wall bushing and the upper grounding switch are oppositely arranged on two sides of the external shell, and the second left wall bushing and the lower grounding switch are oppositely arranged on two sides of the external shell; the outer side terminal of the left wall bushing is used for connecting a test article terminal;
the terminal at the inner side of the left wall bushing is provided with a switch contact which is used for connecting the left switch device, the lower grounding switch and the upper grounding switch;
the right wall bushing comprises a first right wall bushing for connecting a power frequency test transformer, a second right wall bushing for connecting a charging loop of the impulse voltage generator and a third right wall bushing for connecting the impulse voltage generator and a measuring system of the impulse voltage generator;
the left switch device and the right switch device are arranged on two sides of the external shell in a right-facing manner; the right switch device comprises a first right switch device, a second right switch device and a third right switch device, and the three right wall bushing are respectively connected with the three right switch devices;
when the switch works, the first right switch device is connected with the first left switch device or connected with the second right switch device, the second right switch device is suspended or grounded, and the third right switch device is connected with the third left switch device or connected with the lower grounding switch.
Furthermore, a left insulating support and a right insulating support are arranged on the wall of the outer shell, the left switch device is mounted on the left insulating support, and the right switch device is mounted on the right insulating support.
Furthermore, a support insulator is adopted by the left insulating support.
Further, the outer shell is provided with a shell grounding switch.
Furthermore, when the power frequency withstand voltage test state is carried out, the first right switch device is connected with the first left switch device, and the second right switch device and the third right switch device are grounded.
Furthermore, in the impact withstand voltage test state, the first right switch device is connected with the second right switch device, and the third right switch device is connected with the third left switch device.
Furthermore, the left switch device and the right switch device are provided with pneumatic control valves.
Furthermore, a switch control system is arranged and used for detecting the in-place state of the switch action and feeding back a signal to the control system.
Further, the lower grounding switch and the upper grounding switch are linear motion switches.
Furthermore, the intelligent power conversion cabinet switch is controlled to be switched on and off by applying upper computer software.
Compared with the prior art, the invention has the following beneficial effects:
1. the utility model provides an intelligent equipment is used in insulation test of medium voltage switchgear, right switching device includes first right switching device, right switching device of second and right switching device of third, wherein first right switching device is connected with left switching device or is connected with right switching device of second, right switching device of second suspension or ground connection, right switching device of third is connected with left switching device or is connected with lower earthing switch, switch conversion through the power frequency thunder and lightning, realize that power frequency test transformer doubles as the charging transformer of thunder and lightning generator, thereby save test equipment, the rate of utilization of the equipment is improved, the security of support personnel, satisfy the needs of the intelligent construction of medium voltage switchgear insulation test.
2. Pneumatic control valves are designed on two sides of the left switch device and the right switch device, pneumatic and electric isolation is achieved completely, test safety is improved, the pneumatic control valves detect switch action in-place states and feed back signals to a control system, the control system can be used for controlling switch opening and closing, pressurization programs and other related operations, and intelligent medium-voltage insulation test is achieved.
3. The lower grounding switch and the upper grounding switch are linear sliding switches and are parallel to each other, and compared with a traditional spiral switch, the space is saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a front view of an intelligent device for insulation test of a medium voltage switchgear according to the present invention;
FIG. 2 is a left side view of an intelligent device for insulation test of a medium voltage switchgear according to the present invention;
fig. 3 is a perspective view of the inside of an intelligent device for insulation test of a medium voltage switchgear according to the present invention;
fig. 4 is a top view of an intelligent device for insulation test of a medium voltage switchgear according to the present invention;
in the figure: 1. an outer housing; 2. a shell grounding switch; 3. a left wall bushing; 4. a left insulating strut; 5. a left switch device; 6. a lower grounding switch; 7. a right wall bushing; 8. a right switch device; 9. an upper grounding switch; 10. right insulating support and 11, trachea insert panel soon.
Wherein:
3. the left wall bushing comprises 3-1 of a first left wall bushing; 3-2, a second left wall bushing;
5. the left switch device comprises 5-1 and a first left switch device; 5-2, a second left switch device; 5-3, a third left switch device;
7. the right wall bushing comprises 7-1 of a first right wall bushing; 7-2, a second right wall bushing; 7-3, a third right wall bushing;
8. the right switch device comprises 8-1 and a first right switch device; 8-2, a second right switching device; 8-3 and a third right switch device.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Example 1
As shown in fig. 1 to 3, the intelligent equipment for insulation test of medium voltage switchgear of the present invention includes an external casing 1, a casing grounding switch 2, a left wall bushing 3, a left insulation support 4, a left switch device 5, a lower grounding switch 6, a right wall bushing 7, a right switch device 8, an upper grounding switch 9, and a right insulation support 10.
The outer casing 1 is provided with three upper grounding switches 9, three right insulating pillars 10, three right wall bushings 7 and three lower grounding switches 6 from top to bottom on the side connected with the power supply, such as the right side in fig. 1.
The three lower grounding switches 6 and the three upper grounding switches 9 are all parallel linear motion switches;
the three right insulating pillars 10 are respectively provided with a first right switch device 8-1, a second right switch device 8-2 and a third right switch device 8-3, and the right switch device 8 is arranged on the right insulating pillars 10, so that the influence on the structure of the right wall bushing 7 due to frequent action and vibration of the right switch device 8 is avoided;
the outer terminal of the right wall bushing 7 is connected with an external power supply and a measuring device, and the inner terminal is respectively connected with a right switch device 8.
The outer casing 1 is provided with three first left wall bushing 3-1, six left insulating pillars 4 and three second left wall bushing 3-2 from top to bottom on the side connected with the sample terminal, such as the left side in fig. 1.
The six left insulating struts 4 are transversely arranged in two rows and three columns in the longitudinal direction, a first left switch device 5-1, a second left switch device 5-2 and a third left switch device 5-3 are respectively arranged on each column, and the left switch device 5 is arranged on the insulating struts 4, so that the structure of the left wall bushing 3 cannot be influenced by frequent action and vibration of the left insulating struts 4;
the left wall bushing 3 is provided with a first left wall bushing 3-1 and a second left wall bushing 3-2, three wall bushings are respectively arranged and are arranged in parallel, the first left wall bushing 3-1 and the upper grounding switch 9 are arranged on two sides in the outer shell 1 in a facing mode, the second left wall bushing 3-2 and the lower grounding switch 6 are arranged on two sides in the outer shell 1 in a facing mode, the outer terminals of the left wall bushing 3 are connected with a test sample terminal, switch contacts are designed on the inner terminals and are used for being connected with the left switch device 5, the lower grounding switch 6 and the upper grounding switch 9, and when the lower grounding switch 6 and the upper grounding switch 9 are switched off, the switch contacts are connected with the contacts on the left wall bushing 3, so that a grounding function is achieved.
The left insulating pillar 4 is installed between the upper left wall bushing 3 and the lower left wall bushing 3, the terminal of the left insulating pillar 4 is in an equipotential state, and the left switch device 5 is also in an equipotential state.
The shell grounding switch 2 is connected with the test article chassis and the shell and is also used as a protection switch.
Example 2
The invention relates to a test method of intelligent equipment for insulation test of medium-voltage switchgear, which comprises the following steps:
connecting the outer terminal of the left wall bushing 3 with the test sample terminal respectively;
the outer side terminal of the first right wall bushing 7-1 is connected with a power frequency test transformer, and the first right switch device 8-1 is connected with the left switch device 5-1 or the second right switch device 8-2;
the outer side terminal of the second right wall bushing 7-2 is connected with a charging circuit of the impulse voltage generator, and the second right switch device 8-2 is suspended or grounded;
the third right wall bushing 7-3 outer terminal is connected with the surge voltage generator and its measuring system, the third right switch device 8-3 is connected with the left switch device 5-3 or with the lower grounding switch 6,
the shell grounding switch 2 is connected with the test article shell and the underframe.
When a power frequency withstand voltage test is carried out, the first right switch device 8-1 is connected with the left switch device 5-1, and the second right switch device 8-2 and the third right switch device 8-3 are grounded.
When the surge withstand voltage test is performed, the first right switching device 8-1 is connected with the second right switching device 8-2, and the third right switching device 8-3 is connected with the left switching device 5-3.
Preferably, the outer shell 1 is formed by welding steel plates; carrying out surface plastic spraying treatment; the outer shell 1 is provided with an access door which is convenient for later maintenance and overhaul; the side of the outer shell 1 connected with the power supply is provided with a gas pipe quick-plugging panel 11, so that the installation on site is convenient.
Preferably, the left insulating pillar 4 is a pillar insulator.
Preferably, all switch fractures can be independently disconnected except for the linkage switch, pneumatic control valves are designed on two sides of all switches, pneumatic and electric isolation is completely achieved, and the pneumatic control valves detect the in-place state of the switch action and feed back signals to the control system.
Preferably, the control system is used to control the switch on/off and the pressurization program.
The intelligent equipment for the medium-voltage switchgear insulation test mainly comprises an external shell, a wall-penetrating sleeve, an insulation support column, a switching device, a grounding switch and the like, is connected with the intelligent equipment for the medium-voltage switchgear insulation test, a power frequency test transformer, a lightning impulse generator and an intelligent control cabinet during use, and uses upper computer software to control the switch of the intelligent power conversion cabinet to be switched on and off and other related operations, so as to achieve the purpose of related tests. Pneumatic control valves are arranged on two sides of the switch, so that pneumatic and electric isolation is completely achieved, the pneumatic control valves detect the in-place state of the switch action and feed back signals to the control system. Meanwhile, the power frequency test transformer not only serves as power frequency withstand voltage test equipment, but also can serve as a charging transformer of the impulse voltage generator, so that the test equipment is saved, and the utilization rate of the equipment is improved.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. The utility model provides an intelligent equipment is used in medium voltage switchgear insulation test which characterized in that includes: the wall-mounted switch comprises an external shell (1), a left wall-penetrating sleeve (3), a left switch device (5), a lower grounding switch (6), a right wall-penetrating sleeve (7), a right switch device (8) and an upper grounding switch (9);
the left wall bushing (3) and the right wall bushing (7) are respectively arranged on two sides of the external shell (1), the left wall bushing (3) comprises a first left wall bushing (3-1) and a second left wall bushing (3-2), the first left wall bushing (3-1) and the upper grounding switch (9) are oppositely arranged on two sides of the external shell (1), and the second left wall bushing (3-2) and the lower grounding switch (6) are oppositely arranged on two sides of the external shell (1); the outer side terminal of the left wall bushing (3) is used for connecting a test sample terminal;
a switch contact is mounted on a terminal at the inner side of the left wall bushing (3) and is used for connecting the left switch device (5), the lower grounding switch (6) and the upper grounding switch (9);
the right wall bushing (7) comprises a first right wall bushing (7-1) used for connecting a power frequency test transformer, a second right wall bushing (7-2) used for connecting a charging loop of the impulse voltage generator and a third right wall bushing (7-3) used for connecting the impulse voltage generator and a measuring system of the impulse voltage generator;
the left switch device (5) and the right switch device (8) are arranged on two sides of the outer shell (1) in a facing way; the right switch device (8) comprises a first right switch device (8-1), a second right switch device (8-2) and a third right switch device (8-3), and the three right wall bushing (7) are respectively connected with the three right switch devices (8);
when the switch is in work, the first right switch device (8-1) is connected with the first left switch device (5-1) or connected with the second right switch device (8-2), the second right switch device (8-2) is suspended or grounded, and the third right switch device (8-3) is connected with the third left switch device (5-3) or connected with the lower grounding switch (6).
2. The intelligent equipment for insulation tests of medium voltage switchgear according to claim 1, characterized in that the outer casing (1) has walls provided with left (4) and right (10) insulating pillars, the left switchgear (5) being mounted on the left insulating pillar (4) and the right switchgear (8) being mounted on the right insulating pillar (10).
3. The intelligent equipment for insulation tests of medium voltage switchgear, according to claim 2, characterized in that the left insulating pillar (4) is a pillar insulator.
4. An intelligent equipment for insulation tests of medium voltage switchgears according to claim 1, characterized in that the outer casing (1) is provided with a casing earthing switch (2).
5. The intelligent equipment for the insulation test of the medium voltage switchgear according to claim 1, characterized in that in the power frequency withstand voltage test state, the first right switching device (8-1) is connected with the first left switching device (5-1), and the second right switching device (8-2) and the third right switching device (8-3) are grounded.
6. An intelligent equipment for insulation tests of medium voltage switchgear, according to claim 1, characterized in that in the surge withstand voltage test state, the first right switching device (8-1) is connected to the second right switching device (8-2), and the third right switching device (8-3) is connected to the third left switching device (5-3).
7. The intelligent equipment for the insulation test of medium voltage switchgear, according to claim 1, characterized in that the left switching device (5) and the right switching device (8) are provided with pneumatic control valves.
8. The intelligent equipment for the insulation test of the medium voltage switchgear as claimed in claim 7, wherein a switch control system is provided for detecting the switch action in-place state and feeding back a signal to the control system.
9. The intelligent equipment for insulation tests of medium voltage switchgear, according to claim 1, characterized in that said lower earthing switch (6) and upper earthing switch (9) are linear-action switches.
10. The intelligent equipment for the insulation test of the medium-voltage switchgear equipment as claimed in claim 1, wherein the switching on and off operation of the switch of the intelligent power conversion cabinet is controlled by applying upper computer software.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111275838.8A CN113985268B (en) | 2021-10-29 | 2021-10-29 | Intelligent equipment for medium-voltage switchgear insulation test |
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| CN202111275838.8A CN113985268B (en) | 2021-10-29 | 2021-10-29 | Intelligent equipment for medium-voltage switchgear insulation test |
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| CN113985268B CN113985268B (en) | 2024-08-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308586A (en) * | 2022-08-03 | 2022-11-08 | 西安高压电器研究院股份有限公司 | An intelligent device for insulation type test and its control method |
| CN117269691A (en) * | 2023-09-27 | 2023-12-22 | 国网山西省电力公司电力科学研究院 | Internal state and insulation characteristics test system and method of wall bushing |
| CN119199429A (en) * | 2024-11-14 | 2024-12-27 | 江苏省如高高压电器有限公司 | A test system for multiple boost interfaces of power frequency withstand voltage equipment |
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| CN112858740A (en) * | 2021-01-26 | 2021-05-28 | 西安高压电器研究院有限责任公司 | Insulation type test intelligent control cabinet for medium-voltage switchgear |
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2021
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| US20020079906A1 (en) * | 2000-12-21 | 2002-06-27 | Rashkes Viktor S. | Electrical system with capacitance tap and sensor for on-line monitoring the state of high-voltage insulation and remote monitoring device |
| CN102073003A (en) * | 2011-02-16 | 2011-05-25 | 上海思源高压开关有限公司 | Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308586A (en) * | 2022-08-03 | 2022-11-08 | 西安高压电器研究院股份有限公司 | An intelligent device for insulation type test and its control method |
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| CN117269691B (en) * | 2023-09-27 | 2024-05-14 | 国网山西省电力公司电力科学研究院 | Wall bushing internal state and insulation characteristics test system and method |
| CN119199429A (en) * | 2024-11-14 | 2024-12-27 | 江苏省如高高压电器有限公司 | A test system for multiple boost interfaces of power frequency withstand voltage equipment |
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| CN113985268B (en) | 2024-08-13 |
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Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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