Electric contact state discrimination method and device for GIS bus connector
A busbar joint and state discrimination technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of lack of versatility, great influence, inaccuracy, etc., to improve safety and reliability, and to achieve accurate discrimination. , to ensure the effect of stable operation
Active Publication Date: 2017-08-29
WUHAN UNIV
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Problems solved by technology
Using a hand-held infrared camera for inspection, the measurement results are greatly affected by environmental factors such as weather conditions, light, and working environment, and are inaccurate. At the same time, it can only be judged whether there is an overheating fault at the bus joint. Other types of faults of the rated bus joints of the equipment cannot be judged
In fact, most of the above-mentioned identification methods are aimed at the serious consequences of thermal faults on the bus joints of electrical equipment. They are not universal and cannot be used for good identification of other types of faults. Fault predictability cannot well guarantee the operation reliability of GIS
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[0022] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0024] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. They are examples only and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the pur...
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The invention relates to the technical field of power equipment state monitoring, and especially relates to an electric contact state discrimination method and device for a GIS bus connector. The method comprises the steps: 1, building an equivalent circuit model for a to-be-detected GIS bus connector through numerical calculation according to the spatial position and assembly parameters of the GIS bus connector; 2, obtaining the frequency spectrum characteristic curve distribution of the GIS bus connector in different electric contact states through mathematic modeling and physical simulation test, and building a corresponding relation between the frequency spectrum characteristics of the GIS bus connector and the electric contact states of the GIS bus connector; 3, achieving the detection of the electric contact state of the GIS bus connector through obtaining the frequency spectrum characteristic curve of the GIS bus connector according to the corresponding relation, built at step 2, between the frequency spectrum characteristics of the GIS bus connector and the electric contact states of the GIS bus connector. The method can achieve the discrimination of the changes of the butt joint depth, butt joint deviation and butt joint angle of the GIS bus connector, and achieves the complete accurate measurement of the electric contact states of the GIS bus connector.
Description
technical field [0001] The invention relates to the technical field of state monitoring of electric power equipment, in particular to a method and a device for discriminating the electric contact state of a GIS bus joint. Background technique [0002] As an indispensable equipment in the operation of power systems, GIS has the advantages of small footprint, high reliability, less maintenance and long service life, making GIS highly respected in domestic and foreign power transmission and distribution systems, and widely used application. But it also makes the safe operation of GIS will directly affect the reliability of power supply. In fact, factors such as the impact of electrical equipment during transportation and installation or the harsh daily operating environment may cause poor contact or failure of the connector, so monitoring and judging whether the connector of electrical equipment is in good working condition is crucial to ensuring the reliability of the power g...
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IPC IPC(8): G01R31/04
CPCG01R31/69
Inventor 关向雨周杨俊冉彭辉魏鑫
Owner WUHAN UNIV