Device for simulating high-frequency current propagation of partial discharge of GIL/GIS

Patent metadata

Field	Value
Publication number	US-12416661-B2
Application number	US-202218556847-A
Country	US
Kind code	B2
Filing date	Jun 16, 2022
Priority date	Jan 28, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS is disclosed. The device comprises a casing, a busbar cavity, an adjustable impedor, a first metal support, a second metal support, a third metal support, and a high-frequency current sensor. The first metal support and the second metal support are separated by an insulating support, the third metal support has an end connected to the second metal support, as well as an end connected to a grounding grid, and the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series, and is connected in series between the first metal support and the second metal support through a wire. In the application, the adjustable impedor is connected in series to the metal supports at the grounding point to obtain an impedance equivalent to that of a long-distance GIL/GIS housing.

First claim

What is claimed is:

1. A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS, comprising a casing ( 1 ), a busbar cavity ( 14 ), an adjustable impedor ( 11 ), a first metal support ( 6 ), a second metal support ( 8 ), a third metal support ( 9 ), and a high-frequency current sensor ( 13 ), wherein:
the casing ( 1 ) is connected to the busbar cavity ( 14 ), a conductor ( 3 ) is arranged in the busbar cavity ( 14 ), and the busbar cavity ( 14 ) is provided with multiple air vents ( 5 );
the first metal support ( 6 ) and the second metal support ( 8 ) are arranged at a grounding point of the busbar cavity ( 14 ) and are separated from each other by an insulating support ( 7 ), and the adjustable impedor ( 11 ) is connected in series between the first metal support ( 6 ) and the second metal support ( 8 ) through a wire ( 12 ); the third metal support ( 9 ) has one end connected to the second metal support ( 8 ) and another end connected to a grounding grid;
the high-frequency current sensor ( 13 ) is disposed around the wire ( 12 ).

2. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein the adjustable impedor ( 11 ) is formed by an adjustable resistor ( 111 ) and an adjustable inductor ( 112 ) which are connected in series, the adjustable resistor ( 111 ) is connected to the first metal support ( 6 ), and the adjustable inductor ( 112 ) is connected to the second metal support ( 8 ).

3. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein the casing ( 1 ) and the busbar cavity ( 14 ) are connected through a flange ( 2 ).

4. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein the busbar cavity ( 14 ) comprises multiple air chambers.

5. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 4 , wherein insulators ( 4 ) are arranged at joints of the air chambers.

6. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein the air vents ( 5 ) are formed in side faces of air chambers.

7. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein the casing ( 1 ) is connected to a partial discharge-free power-frequency testing transformer.

8. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 1 , wherein multiple pulleys ( 10 ) are arranged at a bottom of the third metal support ( 9 ).

9. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 2 , wherein the adjustable resistor ( 111 ) is a non-wire-wound potentiometer.

10. The device for simulating high-frequency current propagation of partial discharge of a GIL/GIS according to claim 2 , wherein the adjustable inductor ( 112 ) is a coil with a variable core position.

Assignees

• State Grid Jiangsu Electric Power Res Institute
• State Grid Jiangsu Electric Power Co Ltd
• Jiangsu Electric Power Res Inst Co Ltd

Inventors

• Zhao Ke
• Ma Jingtan
• Yang Jinggang
• Huang Qiang
• Liu Jianjun
• Gao Shan
• Chen Shaobo
• Li Hongtao
• Xu Yang
• Zhang Zhaohui
• Li Yujie
• Sun Rong
• Liu Yongfei
• Xiao Hanyan
• Zhuang Tianxin

Classifications

• G01R31/3274

  Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance (measuring contact resistance G01R27/205) · CPC title

• G01R31/1272

  of cable, line or wire insulation, e.g. using partial discharge measurements (locating faults in cables G01R31/083) · CPC title

• G01R31/12 Primary

  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 (G01R31/08, G01R31/327 and G01R31/72 take precedence; measuring in plasmas G01R19/0061; measuring dielectric constants G01R27/2617; ESD, EMC or EMP testing of circuits G01R31/002)} · CPC title

• G01R31/001

  Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing (measuring electromagnetic fields G01R29/08; circuits for generating HV pulses in dielectric strength testing G01R31/14) · CPC title

• Y02E60/00

  Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation · CPC title