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Method for operating an electrical apparatus and electrical apparatus

A technology of electrical equipment and equipment, applied in the field of transmission network, can solve the problems of not obtaining the operating state of electrical equipment or various operating states, and not monitoring multi-component insulating fluids, etc.

Active Publication Date: 2015-07-01
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, a disadvantage of the disclosed methods and apparatus is that they do not monitor the multi-component insulating fluid and do not derive the operating state or various operating states of the electrical equipment.

Method used

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  • Method for operating an electrical apparatus and electrical apparatus
  • Method for operating an electrical apparatus and electrical apparatus
  • Method for operating an electrical apparatus and electrical apparatus

Examples

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Embodiment Construction

[0237] figure 1 A schematic diagram of an electrical device (high voltage switchgear) according to a first embodiment of the present invention is shown. In the first embodiment, the electric device comprises two compartments 11 , wherein the live part 60 is arranged inside the compartments 11 . The space 11 is filled with an insulating fluid 10 for separating the live part 60 from the walls of the space 11 . The insulating fluid 10 comprises a concentration c at 20° C. of 0.3 bar (or equivalently 0.3 A) of the first fluid component A (1,1,1,3,4,4,4-heptafluoro-3-(tri-fluoromethyl)butan-2-one) at a partial pressure of 0.7 at 20°C bar (or equivalently a concentration of 0.7 c B ) of the second fluid component B (nitrogen) at a partial pressure. Fluid components A and B are intentional components of the insulating fluid 10 , ie they are not decomposition products or contaminants of the insulating fluid 10 formed eg during electrical discharges or other electrical stresses.

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Abstract

A method and device for operating a fluid-insulated electrical apparatus (1) are disclosed. The insulation fluid (10) of the electrical apparatus (1) comprises at least two fluid components (A,B) which are a priori ingredients of the insulation fluid (10). The method comprises the step of carrying out at least one optical measurement and / or at least one gas chromatographic measurement on the insulation fluid (10). Using this measurement or these measurements or at least one additional measurement on the insulation fluid(10), a first concentration (cA) of the first fluid component (A) and a second concentration (cB) of the second fluid component (B) are derived. Then, using the first concentration (cA) and the second concentration (cB), and, advantageously, a dielectric breakdown strength Ebd of the insulation fluid (10), an operating state (O) of the electrical apparatus (1) is derived.

Description

technical field [0001] The invention relates to a method for operating a fluid-insulated electrical device. Furthermore, it relates to such an electrical installation with an analysis and control unit implementing the method and to a power grid comprising such an electrical installation. Background technique [0002] Dielectric insulation media in liquid and / or gaseous state (ie, fluid) are widely used to insulate live parts in a variety of electrical equipment, such as switchgear and transformers. For example, live parts in medium or high voltage metal-enclosed switchgear are arranged in a gas-tight compartment, which encloses an insulating gas at a pressure of several bars, which electrically separates the compartment of the device from the live parts. In other words, the insulating gas does not allow current to pass from the live parts to the space. The commonly used dielectric insulating gas is sulfur hexafluoride (SF 6 ), which exhibits excellent insulation and arc e...

Claims

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Application Information

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IPC IPC(8): H01H33/56H01H33/22G01N21/75
CPCH01H33/22G01N21/3577G01N21/31G01N21/64H01H33/563G01N21/3504G01N21/33G01N21/3581
Inventor T.A.鲍尔A.克拉梅E.基尔勒J.曼蒂拉M-S.克拉伊斯森斯S.格罗布H.布兰德勒O.科萨特M-D.布尔格勒
Owner HITACHI ENERGY SWITZERLAND AG
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