Modified formula of environment-friendly gas insulating medium

Abstract

The invention provides a modified formula of an environment-friendly gas insulating medium. The modified formula is characterized by comprising an environment-friendly dielectric, a buffer gas and oxygen, wherein the environment-friendly dielectric accounts for 4% to 10% by volume, the buffer gas accounts for 80% to 94% by volume, and the oxygen accounts for 2%to 10% by volume. The environment-friendly dielectric is any one of C4F7N, C5F10O, and C6F12O. The buffer gas is either N2 or CO2. A mixed gas configured according to the modified formula of the environmentally-friendly gas insulating medium of the invention, when used in an electrical device, such as a gas-insulated combined device, using an insulating gas as an insulating medium, has a higher dielectric strength than a unmodified environmentally-friendly dielectric mixed gas. Moreover, the modified environment-friendly dielectric mixed gas can reduce the precipitation of carbon particles and enhance the insulation reliability of the environment-friendly dielectric mixed gas.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of the insulation state of gas-insulated medium electrical equipment, in particular to a modification formula of an environment-friendly gas-insulated medium. Background technique [0002] Sulfur hexafluoride (SF 6 ) is widely used in the power industry because of its good insulation and arc extinguishing properties. As an excellent gas insulation medium in electrical equipment, SF 6 It also has a very high greenhouse effect value and a long atmospheric lifetime. Rising average global temperatures have sparked debate within the power industry about the use of SF 6 and what devices use SF 6 and other debates, in recent years, policy makers have expressed interest in restricting SF 6 Use the tough attitude to spur SF 6 Emergence of the field of alternative gases. Some macromolecular substances containing more fluorine elements are gradually "excavated" and become very promising alte...

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Problems solved by technology

[0004] However C 4 f 7 N, C 5 f 10 O, C 6 f 12 O and other three insulating media and N 2 The three mixed gases formed will have a large number of carbon particles precipitated after multiple discharge breakdowns, and the existence of carbon particles should be avoided as much as possible in the insulation gap to ensure the insulation reliability of the insulation gap; and C 4 f 7 N or C 5 f 10 O or C 6 f 12 O and CO 2 or N 2 The dielectric strength of the formed mixed gas is low, as SF 6 Alternative gases used in the power industry need to increase the total filling pressure to meet the insulation requirements of the equipment. This solution is not economically feasible.

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