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DC GIL disc insulator surface charge density measurement and observation platform

A surface charge density, pot insulator technology, applied in the field of DC GIL pot insulator surface charge density measurement and observation platform, can solve the insulator surface flashover characteristics research, can not provide effective theoretical guidance for DC GIL insulation optimization design, can not Establish the correlation characteristics of charge accumulation and insulator flashover along the surface, so as to achieve the effect of easy platform design, reduced construction cost and simple operation

Active Publication Date: 2016-07-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] However, at present, most researchers only simply measure the surface charge density of DC GIL insulators, and do not conduct quantitative research on the surface flashover characteristics of insulators after surface charge accumulation, and cannot establish the relationship between charge accumulation and insulator surface flashover. Therefore, it cannot provide effective theoretical guidance for the insulation optimization design of DC GIL

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  • DC GIL disc insulator surface charge density measurement and observation platform
  • DC GIL disc insulator surface charge density measurement and observation platform

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 A schematic diagram of a surface charge density measurement and surface flashover observation platform of a DC GIL pot insulator provided by the present invention; the platform includes a metal cavity 12, a coaxial cylindrical structure test device, a charge measurement device, a surface flashover observation window, a sleeve Tube 14, high-pressure guide rod 13, high-speed camera 17 and turning mechanism 6. It is characterized in that: the metal cavity 12 is divided into three chambers by the insulator 11, a quartz window 8 is installed on the top of the right chamber, and a high-speed camera bracket 9 is installed on the flange cover plate 16 outside the cavity. Two sections of metal shell 2 are installed on the test basin insulator 1 through flanges, and two sections of metal guide rod 3 are installed on the center of the test basin insulator 1 through threa...

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Abstract

The invention belongs to the field of high-voltage DC solid insulation material surface charge accumulation and surface flashover measurement, and particularly relates to a DC GIL disc insulator surface charge density measurement and observation platform, which is characterized in that two insulators separate a sealed metal cavity into three cavity rooms; the cavity room at the left side is connected with an external casing via a flange; a charge measurement device inside the cavity room above the right side is located above a coaxial cylindrical structure test device, a turning mechanism is fixed on the wall of the metal cavity, the coaxial cylindrical structure test device is connected with the turning mechanism via the support, a quartz window is arranged at the top of the cavity room, and a high-speed camera support and a high-speed camera are arranged outside the cover plate of the top flange; and each of the three cavity rooms is respectively provided with a valve with a barometer. The design is easy to realize, the operation is simple, and a reliable and effective test platform is provided for doing research on correlated characteristics between the disc insulator surface charge accumulation and surface flashover in the DC GIL.

Description

technical field [0001] The invention belongs to the field of surface charge accumulation and surface flashover measurement of high-voltage DC solid insulating materials, and in particular relates to a surface charge density measurement and observation platform of a DC GIL pot insulator. Background technique [0002] Gas-insulated metal-enclosed transmission lines (GIL) have the characteristics of large transmission capacity, small loss, small capacitance, small footprint, high reliability, and are suitable for harsh environments. occasions have been widely used. But at present, AC GILs are used for commercial operation, while DC GILs have not been applied on a large scale in actual projects. The main reason is that under the action of DC voltage, the surface charge of the supporting insulator in the DC GIL accumulates seriously, which distorts the electric field distribution along the surface and reduces the withstand voltage of the insulator. Especially when the voltage p...

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Application Information

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IPC IPC(8): G01R29/24G01R31/12
CPCG01R29/24G01R31/1245
Inventor 周宏扬马国明王璁李成榕毛乃强
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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