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Method for evaluating latent fault factors existing in GIS structure state

A technology of structural state and evaluation method, which is applied in processing detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, complex mathematical operations, etc., can solve problems such as easy-to-induce accidents, and achieve the effect of improving operational reliability

Inactive Publication Date: 2020-07-31
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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Problems solved by technology

[0003] The present invention provides an evaluation method for latent failure factors in the structural state of GIS, and solves the technical problem of how to timely judge the structural changes of the structure that easily induce accidents

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  • Method for evaluating latent fault factors existing in GIS structure state

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Embodiment Construction

[0019] The present invention is described in detail below in conjunction with accompanying drawing:

[0020] A kind of evaluation method of latent fault factor existing in GIS structure state, is characterized in that the following steps:

[0021] The first step is to select a certain cross-section of the GIS as the detection section, which is on the metal shell 3 of the GIS or on the pot insulator 1;

[0022] In the second step, on the detection section selected in the first step, determine eight frequency response signal collection points at equal intervals, and on each frequency response signal collection point, an acceleration sensor 5 is set; On the detection section, select the striking point of the force hammer, and set the force hammer 6 on the selected force hammer striking point;

[0023] The 3rd step, the output end of hammer 6 is connected together with the input end of single-channel signal amplifier 7 with single-channel signal transmission line 9, the output te...

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Abstract

The invention discloses a method for evaluating latent fault factors existing in a GIS structure state, and solves a problem that how to timely evaluate structure change of a GIS structure to easily cause accidents. The method is characterized in that a plurality of excitation frequency response test points are arranged at equal intervals on the same cross section of GIS, a force hammer excitationpoint is arranged between two adjacent excitation frequency response test points, through a force hammer, on a force hammer excitation point, a certain force is applied, a vibration acceleration sensor is arranged on the excitation frequency response test point, a response signal is obtained from the vibration acceleration sensor, and an excitation signal and the response signal are processed through corresponding signal amplifiers, the excitation signal and the response signal are inputted into a modal analyzer as input signals, frequency response function analysis is performed, the frequency response functions obtained by two times of measurement are compared according to the amplitude of the frequency response function or an imaginary part extreme value of the frequency response function, and the structure of the GIS is evaluated.

Description

technical field [0001] The invention relates to an evaluation method for latent failure factors in the structural state of a GIS, which is suitable for accurate and timely detection and evaluation of the structural state of the GIS in operation. Background technique [0002] The enclosed gas-insulated combined electrical apparatus (referred to as GIS) has the characteristics of small footprint, high reliability and good insulation, so it has been widely used in the power grid; the structure of GIS is relatively simple, consisting of several separate The basin-type insulator air chamber is combined. Due to its fully enclosed structural characteristics, once an accident occurs, the consequences are often more serious and the repair is more complicated. Therefore, it is necessary to carry out inspection and evaluation in advance to eliminate the accident. In the embryonic stage; in all kinds of accidents that occur in GIS, due to factors such as temperature, humidity, and groun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/44G06F17/14
CPCG01N29/045G01N29/4409G06F17/142
Inventor 李国栋刘志翔梁基重俞华胡帆
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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