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Variable weight function-based multi-parameter cable state evaluation method

A state evaluation, weight function technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as unreasonable distribution of weight coefficients

Inactive Publication Date: 2016-06-01
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-parameter cable state evaluation method based on variable weight function, to solve the problem that the constant weight evaluation model in the current cable evaluation method cannot reflect the influence of the degradation of the small weight value state quantity on the evaluation target, so that the distribution of weight coefficients unreasonable question

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  • Variable weight function-based multi-parameter cable state evaluation method
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  • Variable weight function-based multi-parameter cable state evaluation method

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Embodiment Construction

[0063] The present invention will be described in detail below in combination with specific embodiments.

[0064] see Figure 1 to Figure 5 Shown, a kind of multi-parameter cable state evaluation method based on variable weight function of the present invention comprises the following steps:

[0065] (1) Construct the cable status evaluation index set {P 1 ,P 2 ,...,P n}, for the first time considered the influence of power grid harmonics and single-phase fault handling methods on the cable operation status, the evaluation index set see figure 1 . The cable status evaluation index set includes: operating years, fault records, defect records, main insulation resistance, AC withstand voltage, outer sheath DC voltage, partial discharge, load current, cable surface temperature, cable joint temperature, ground current, partial discharge, Temperature, humidity, water level, gas content, manhole cover status, fire risk, single-phase fault handling method and grid harmonics, the ...

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Abstract

The invention discloses a variable weight function-based multi-parameter cable state evaluation method. The method comprises steps: a cable state evaluation index set is built; a judgment matrix A is built; normalization processing is carried out on evaluation indexes; a comment set for fuzzy evaluation is built; a membership function corresponding to the evaluation state is set, and a fuzzy judgment matrix R is obtained; an evaluation index variable weight vector W is built; a local variable weight function S is built; and a high-voltage crosslinked cable line comprehensive state evaluation model is built for evaluating the cable state. According to the method of the invention, the index weight changes along with changes of the index value, the problem that the constant weight evaluation method can not present influences on an evaluation target by deterioration of a small weight value state amount can be effectively solved, and the evaluation result is more in line with the actual production and operation state of the cable and even the power grid equipment state.

Description

technical field [0001] The invention belongs to the technical field of fault detection and diagnosis of power equipment, and in particular relates to a cable state evaluation method. Background technique [0002] With the development of the economy, the load of the power grid is increasing day by day. Restricted by factors such as line corridors and the electromagnetic environment, power cables, as important equipment in the urban power grid, are developing extremely fast and accompanying the development The number of cable accidents has also increased rapidly, which has brought a huge impact on the development of the economy and society. Cable lines are usually laid underground by channels, pipes, and direct burial. In daily operation and maintenance, it is difficult to directly inspect, It is difficult to monitor and control its operating status, so strengthen the systematic research on the monitoring and evaluation technology of cable line operating status, comprehensivel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 琚泽立蒲路赵学风
Owner STATE GRID CORP OF CHINA
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