Method for operating electrical equipment and electrical equipment

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

Active Publication Date: 2018-01-19
HITACHI ENERGY SWITZERLAND AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 electrical equipment and electrical equipment
  • Method for operating electrical equipment and electrical equipment
  • Method for operating electrical equipment and electrical equipment

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no. 2 example

[0250] For the first and second embodiments, an optical sensor or optical measurement is used to derive the fluid constituent concentration c A 、c B and / or c C The advantages are (i) high specificity for individual fluid components, (ii) high sensitivity, and (iii) broad applicability to any insulating fluid mixture including optical absorption or fluorescence.

[0251] Figure 4 shows a second embodiment according to the invention (see above for image 3 ), a schematic diagram of an optical absorption sensor 20 as useful in an electrical device 1 . Here, the light is monochromatized inside the light source 22 by means of a grating (only schematically shown) and split into two beams with a 50:50 beam splitter 28 . A beam of light is directed through a reference cell 21 with known absorbance per wavelength. The other light beams are directed through the measuring cell 21 of the optical sensor, into which the extracted quantity of insulating fluid 10 is passed before perfor...

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Abstract

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

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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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/56H01H33/22G01N21/75
CPCH01H33/563G01N21/31G01N21/3577G01N21/64H01H33/22
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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