Bending resistance testing system for single column leg of three-post insulator of GIL equipment

Abstract

The invention discloses a bending resistance testing system for a single column leg of a three-post insulator of GIL equipment. The bending resistance testing system comprises a three-post insulator tool, a thrust testing mechanism and a terminal mechanism which are connected in sequence, wherein the three-post insulator tool is used for fixing the tested three-post insulator; the thrust testing mechanism comprises a motor, a thrust sensor, a displacement sensor and a strain gauge; the terminal mechanism comprises a terminal machine and an oscilloscope. The bending resistance testing system for the single column leg of the three-post insulator of the GIL equipment provided by the embodiment of the invention is reasonable and simple in framework, clear and intuitive, can accurately determine the bending resistance of a column leg insert of the three-post insulator in actual GIL application, is convenient to use, and greatly facilitates the collection and acquisition of performance information by technicians.

Description

Technical field [0001] The invention relates to the technical field of high-voltage electrical tests, in particular to a test system for the bending resistance of a single leg of a three-pillar insulator of a GIL device. Background technique [0002] Gas-insulated Metal-enclosed Transmission Line (GIL), as a transmission bus, is a transmission equipment with broad development prospects and is widely used in large nuclear power plants and hydropower stations. The structure of the GIL is a metal pipe, which is filled with a certain pressure of sulfur hexafluoride (SF6) gas as an insulating medium, and a conductor located in the center is used to transport electrical energy. In practical applications, three-pillar insulators are used as the main insulators to rely on and insulate the central conductor. It can be seen that the three-pillar insulator plays a very important role in the GIL field. [0003] Three-pillar insulators will be affected by different factors such as thermal exp...

AI Technical Summary

Problems solved by technology

[0003] Under different complex working conditions, the three-pillar insulator will be affected by different factors such as thermal expansion and contraction of the conductor / housing, ground subsidence, assembly errors, etc., which will cause changes in its structure and electrical performance, so as to cause damage to power transmission equipment.

Among them, the legs of three-pillar insulators are susceptible to large bending moment loads, and three-pillar insulators with insufficient bending resistance of single-pillar legs will form internal air gap defects under complex stress conditions such as transportation, installation, and operation. With the long-term operation and development of equipment, insulation failure and insulator burst accidents will eventually occur, resulting in a certain degree of personnel and property losses

[0004] At present, the detection of three-pillar insulators only focuses on the mechanical properties of the three-pillar insulators that bear the gravity of the conductor as a whole and the mechanical load performance caused by axial displacement. For the bending performance of the pillar legs that the three-pillar insulators must face in practical applications The problem has not been covered, and because the force of the three-pillar insulator under actual working conditions is very complicated, it is difficult to simulate the force; and the test system that is quite different from the actual situation cannot truly and effectively reflect the three-pillar insulator. The force information and stress information of the insulator, which leads to the inability to obtain accurate information about the bending performance of the post leg inserts of the three-pillar insulator

Images