Device for researching breakdown waveform characteristics of GIS (Gas Insulated Switchgear)

Abstract

The utility model relates to a device for researching the breakdown waveform characteristics of a GIS (Gas Insulated Switchgear), which comprises a main bus shell, a branch bus shell connected to the main bus shell and a collection sensor arranged on the branch bus shell, a main conductor in the main bus shell is connected with a branch conductor in a branch bus; and a short-circuit conductor connected with the main bus shell and the main conductor is also arranged in the main bus shell. When the device is used, the short-circuit conductor is placed in the bus shell, so that simulation of a breakdown position is realized, discharge waveform data is collected through the collection sensor, breakdown voltage frequencies and placement experiments of multiple positions of the short-circuit conductor are obtained, and multiple groups of breakdown voltage frequencies are obtained. The relation between the breakdown voltage frequency and the breakdown position is analyzed through comparison of multiple groups of data, and when breakdown faults possibly occur in the GIS equipment withstand voltage test process, the breakdown position can be obtained by obtaining the breakdown voltage frequency, so that positioning of the breakdown position is achieved.

Description

Technical Field

[0001] The utility model relates to the field of GIS, in particular to the technical field of GIS breakdown research, and specifically refers to a device for studying GIS breakdown waveform characteristics. Background Art

[0002] Breakdown failures may occur during the voltage test of GIS equipment. The GIS branch structure is complex, and the breakdown energy during the voltage test is low, which brings challenges to breakdown positioning during the test.

[0003] The recent development of VFTO sensors has provided the foundation for locating GIS breakdown locations using transient voltages. However, this test method requires extensive debugging and testing. Directly testing using GIS intervals is limited by their structure and inconvenient for flexible measurement distance settings. Furthermore, the cost of full-scale test prototypes is prohibitive, resulting in a waste of resources. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a device for studying the breakdown waveform characteristics of GIS. By collecting the changes in the breakdown gap position and the changes in the distance between the sensor and the breakdown position, the discharge waveform data at different breakdown positions are collected, thereby obtaining the breakdown voltage frequency. The relationship between the breakdown voltage frequency and the breakdown position is then analyzed by comparing multiple sets of data. When a breakdown failure may occur during the withstand voltage test of the GIS equipment, the breakdown position can be obtained by obtaining the breakdown voltage frequency, thereby locating the breakdown position.

[0005] The utility model is realized through the following technical solution: a device for studying the breakdown waveform characteristics of GIS, comprising a main busbar housing, a branch busbar housing connected to the main busbar housing, and a collecting sensor arranged on the branch busbar housing; the main conductor in the main busbar housing is connected to the branch conductor in the branch busbar; and a short-circuit conductor connecting the main busbar housing and the main conductor is further provided in the main busbar housing.

[0006] When the utility model is in use, the short-circuit conductor is placed at any position of the busbar shell, thereby realizing the simulation of the breakdown position, and at the same time, the discharge waveform data is collected by collecting sensors to obtain the breakdown voltage frequency, and multiple groups of breakdown voltage frequencies are obtained by placing the short-circuit conductor at multiple positions. The relationship between the breakdown voltage frequency and the breakdown position is analyzed by comparing the multiple groups of data. When a breakdown fault may occur during the withstand voltage test of the GIS equipment, the breakdown position can be obtained by obtaining the breakdown voltage frequency, thereby realizing the positioning of the breakdown position.

[0007] Preferably, the main busbar housing is provided with a plurality of openings for connecting with the branch busbar housings.

[0008] This preferred solution facilitates the connection between the main busbar housing and multiple branch busbar housings through the setting of multiple pull-outs, so that multiple collection sensors can collect data. At the same time, by adjusting the connection between the branch busbar and different pull-outs, the distance between the collection sensor and the breakdown position can be adjusted to obtain more sets of data.

[0009] Preferably, one end of the branch busbar housing is connected to the main busbar housing, and the other end is connected to the collection sensor, and branch busbar housings of different heights are connected to the main busbar housing.

[0010] When this preferred solution is in use, the distance between the collection sensor and the breakdown position is further adjusted by setting branch busbar shells at different heights, thereby enriching the data.

[0011] Preferably, there are several main busbar housings, and the several main busbar housings are connected in sequence, and the main conductors are also connected in sequence.

[0012] This preferred solution provides a longer placement position for adjusting the position of the short-circuit conductor by setting the main busbar housing, thereby further enriching the data.

[0013] Preferably, two contact seats are provided in the main busbar housing with openings arranged opposite to each other and corresponding to a main conductor. The main conductor located between the two contact seats is inserted into the two contact seats. A conductive spring connected to the main conductor is provided in the contact seat. The two contact seats located between the two main conductors are connected.

[0014] This preferred solution realizes the connection of several main conductors by setting a contact seat, and facilitates the connection between the main conductor and the contact seat by setting a conductive spring.

[0015] Preferably, the main busbar housing is provided with a mounting seat corresponding to the pull-out port, a support insulator is detachably connected to the mounting seat, the support insulator is connected to a vertical conductor extending upward, and the top of the vertical conductor is connected to the branch conductor through a plum blossom contact.

[0016] This preferred solution provides support for the vertical conductor by providing a mounting base.

[0017] Preferably, the contact base is bolted to the mounting base, and the vertical conductor is bolted to the contact base. This preferred solution provides support to the contact base through the provision of the mounting base, while achieving connection between the main conductor and the branch conductor.

[0018] Preferably, the top of the branch busbar housing is connected to a pot-type insulator, a sealing cap is connected to the pot-type insulator, and flanges are provided on the sealing cap and the collection sensor, and the two flanges are fixedly connected by bolts.

[0019] This preferred solution facilitates fixing different types of collecting sensors on the flange by setting the sealing cap and collecting sensors, and then uses bolts to connect the two flanges, thereby facilitating the connection of the branch busbar housing with different types of collecting sensors.

[0020] Preferably, the side of the main busbar housing is provided with a plurality of hand holes arranged along its length. This preferred solution facilitates the placement of short-circuit conductors at different positions through the provision of hand holes.

[0021] The beneficial effects of the present invention are as follows: placing the short-circuit conductor at any position of the busbar shell, thereby simulating the breakdown position, and collecting discharge waveform data through a collecting sensor to obtain the breakdown voltage frequency, and through the placement experiment of the short-circuit conductor at multiple positions, multiple groups of breakdown voltage frequencies are obtained, and the relationship between the breakdown voltage frequency and the breakdown position is analyzed by comparing multiple groups of data. When a breakdown failure may occur during the voltage withstand test of the GIS equipment, the breakdown position can be obtained by obtaining the breakdown voltage frequency, thereby locating the breakdown position; through the setting of multiple pull-outs, it is convenient to connect the main busbar shell with multiple branch busbar shells, so that multiple collecting sensors can collect data, and at the same time, by adjusting the connection between the branch busbar and different pull-outs, the distance between the collecting sensor and the breakdown position can be adjusted, thereby obtaining more groups of data; through the setting of branch busbar shells of different heights, the distance between the collecting sensor and the breakdown position can be further adjusted, thereby enriching the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 for Figure 1 A in the middle is an enlarged cross-sectional view;

[0024] Figure 3 for Figure 1 Enlarged cross-sectional view at point B;

[0025] Figure 4 This is a left side schematic diagram of the structure of the utility model;

[0026] As shown in the figure:

[0027] 1. Main busbar housing, 2. Pot-type insulator between two plum blossom contacts, 3. Pull-out port, 4. Hand hole, 5. Main conductor, 6. Conductive spring, 7. Contact seat, 8. Plum blossom contact, 9. Vertical conductor, 10. Post insulator, 11. Collecting sensor, 12. Pot-type insulator on branch busbar housing, 13. Branch busbar housing, 14. Branch conductor, 15. Mounting seat, 16. Closing cap. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0029] Refer to the attached Figure 1-4 The utility model provides a device for studying the breakdown waveform characteristics of GIS, including a transversely extending main busbar housing 1, three main busbar housings 1 are arranged in sequence along the transverse direction and connected in sequence, a transversely extending main conductor 5 is provided in the main busbar housing 1, one main conductor 5 extends into two adjacent main busbar housings 1, both ends of the main conductor 5 are inserted into contact seats 7, a conductive spring 6 connected to the main conductor 5 is provided in the contact seat 7, and two contact seats 7 located between two adjacent main conductors 5 are connected.

[0030] The side of the main busbar housing 1 is provided with a plurality of hand holes 4 arranged in a transverse direction, and the hand holes 4 are sealed with end covers. The main busbar housing 1 is also provided with a short-circuit conductor connecting the main conductor 5 and the main busbar housing 1.

[0031] Three openings 3 arranged in a transverse direction are provided on the top surface of the main busbar housing 1 , one of the openings 3 is connected to a branch busbar housing 13 , and the heights of the three branch busbar housings 13 are different.

[0032] The main busbar housing 1 is provided with a mounting seat 15 corresponding to the pull-out port 3, and a support insulator 10 is detachably connected to the mounting seat 15. The upper end of the support insulator 10 is provided with a vertical conductor 9 extending upward, and the top of the vertical conductor 9 is connected to a plum blossom contact 8, which is bolted to the basin insulator, and the top of the basin insulator is bolted to the plum blossom contact 8, which is connected to the branch conductor 14, that is, the vertical conductor 9 is connected to the branch conductor 14 located in the branch busbar housing 13 through the plum blossom contact 8. The basin insulator, plum blossom contact 8, contact seat 7, and conductive spring 6 are all existing technologies.

[0033] The contact base 7 is connected to the mounting base 15 by bolts, and the vertical conductor 9 is connected to the contact base 7 by bolts.

[0034] The bottom end of the branch busbar housing 13 is connected to the main busbar housing 1, and the top end of the branch busbar housing 13 is connected to a pot-type insulator, and a sealing cap 16 is connected to the pot-type insulator. The sealing cap 16 and the collection sensor 11 are both provided with flanges, and the two flanges are fixedly connected by bolts.

[0035] When the utility model is in use, first, the short-circuit conductor is connected between the main busbar shell 1 and the main conductor 5 as needed, and the discharge fault point is artificially set; then the collecting sensor 11 is installed on the branch bus; finally, a suitable breakdown voltage is applied to the end of the main conductor 5, and after breakdown occurs at the breakdown gap position, the discharge waveform data is collected by the sensor, and then by changing the position of the short-circuit conductor and / or the position of the collecting sensor 11, the distance between the short-circuit conductor and the collecting sensor 11 is changed, and after another test, the discharge waveform data is collected to obtain the breakdown voltage frequency, and through multiple groups of tests, multiple groups of data are collected, and then the relationship between the breakdown voltage frequency and the breakdown position is analyzed by comparing the multiple groups of data. When a breakdown fault may occur during the voltage withstand test of the GIS equipment, the breakdown voltage frequency is obtained from the sensor, and then the breakdown position can be obtained based on the previous multiple groups of data and the relationship between the breakdown voltage frequency and the breakdown position, thereby realizing the positioning of the breakdown position.

[0036] Specifically, the position of the collecting sensor 11 and the short-circuit conductor can be adjusted by changing the position of the short-circuit conductor while keeping the position of the collecting sensor 11 unchanged, or by changing the position of the short-circuit conductor while keeping the position of the short-circuit conductor unchanged. The change in the position of the collecting sensor 11 can be changed by adjusting the branch bus housing 13 to connect with different outlets 3, or by replacing branch buses of different heights.

[0037] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for studying GIS breakdown waveform characteristics, characterized by: The invention comprises a main busbar housing (1), a branch busbar housing (13) connected to the main busbar housing (1), and a collecting sensor (11) arranged on the branch busbar housing (13); a main conductor (5) in the main busbar housing (1) is connected to a branch conductor (14) in the branch busbar; and a short-circuit conductor connecting the main busbar housing (1) and the main conductor (5) is further arranged in the main busbar housing (1).

2. The device for studying GIS breakdown waveform characteristics according to claim 1, characterized in that: The main busbar housing (1) is provided with a plurality of extraction ports (3) connected to the branch busbar housings (13).

3. The device for studying GIS breakdown waveform characteristics according to claim 1, characterized in that: One end of the branch busbar housing (13) is connected to the main busbar housing (1), and the other end is connected to the collection sensor (11). Branch busbar housings (13) of different heights are connected to the main busbar housing (1).

4. The device for studying GIS breakdown waveform characteristics according to claim 1, characterized in that: The main busbar housings (1) are provided in plurality, and the plurality of main busbar housings (1) are connected in sequence, and the main conductors (5) are also connected in sequence.

5. The device for studying GIS breakdown waveform characteristics according to claim 2, characterized in that: Two contact seats (7) are provided in the main busbar housing (1) with openings arranged opposite to each other and corresponding to a main conductor (5). The main conductor (5) located between the two contact seats (7) is inserted into the two contact seats (7). A conductive spring (6) connected to the main conductor (5) is provided in the contact seat (7). The two contact seats (7) located between the two main conductors (5) are connected.

6. The device for studying GIS breakdown waveform characteristics according to claim 5, characterized in that: The main busbar housing (1) is provided with a mounting seat (15) corresponding to the extraction port (3), a support insulator (10) is detachably connected to the mounting seat (15), the support insulator (10) is connected to a vertical conductor (9) extending upward, and the top of the vertical conductor (9) is connected to a branch conductor (14) via a plum blossom contact (8).

7. The device for studying GIS breakdown waveform characteristics according to claim 6, characterized in that: The contact seat (7) is bolted to the mounting seat (15), and the vertical conductor (9) is bolted to the contact seat (7).

8. The device for studying GIS breakdown waveform characteristics according to claim 3, characterized in that: The top end of the branch busbar housing (13) is connected to a pot-type insulator, and a sealing cap (16) is connected to the pot-type insulator. The sealing cap (16) and the collecting sensor (11) are both provided with flanges, and the two flanges are fixedly connected by bolts.

9. The device for studying GIS breakdown waveform characteristics according to claim 1, characterized in that: The side surface of the main busbar housing (1) is provided with a plurality of hand holes (4) arranged along the length direction thereof.

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