Electric transmission line pole reliability analysis-based grid risk assessment method

A transmission tower, risk assessment technology, applied in data processing applications, instruments, calculations, etc., can solve the problem of lack of quantitative analysis of risks

Active Publication Date: 2018-01-12
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

The disadvantage of this method is that the two-dimensional risk matri

Method used

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  • Electric transmission line pole reliability analysis-based grid risk assessment method
  • Electric transmission line pole reliability analysis-based grid risk assessment method
  • Electric transmission line pole reliability analysis-based grid risk assessment method

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Embodiment Construction

[0060] A grid risk assessment method based on the reliability analysis of transmission line towers, comprising the following steps:

[0061] Step 1. Collect the design data of transmission towers in the grid, and obtain data such as design reference period, design ice thickness, design wind speed level, self-weight of transmission towers, and root opening of transmission towers;

[0062] Step 2. Calculate the mean value μ of the tower component resistance R of each base tower component in the transmission grid R and mean square error σ R , Permanent load effect S G mean of and mean square error variable load effect S Q mean of and mean square error

[0063] Step 2.1, calculate the load-effect ratio ρ of transmission tower components, the formula is:

[0064]

[0065] In the formula, S GK is the permanent load effect; S QK is the variable load effect; G TK is the self-weight of the tower; G GK is the self-weight load; W X is the wind load of the ground wire;...

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Abstract

The invention discloses an electric transmission line pole reliability analysis-based grid risk assessment method. The electric transmission line pole reliability analysis-based grid risk assessment method comprises, step one, collecting design data of electric transmission poles inside a grid; step two, computing the mean value mu R the mean variance sigma R of the pole component resistance R, the mean value mu SG and the mean variance sigma SG of the permanent load effect SG, the mean value mu SQ and the mean variance sigma SQ of the variable load effect SQ of every basic pole component inside the power transmission grid; step three, according to computing results of the step two, computing the reliability beta of every basic power transmission pole in the grid through a JC method; stepfour, computing the failure probability of every basic power transmission pole in the grid; step five, computing the weight factor w of every basic power transmission pole in the grid through an entropy weight method; step six, computing power transmission grid risk P. The electric transmission line pole reliability analysis-based grid risk assessment method solves the problems of high subjectivity and lack of quantitative risk analysis in two-dimensional risk matrixes in the prior art.

Description

technical field [0001] The invention belongs to an operation and maintenance method for an overhead transmission line, in particular to a grid risk assessment method based on the reliability analysis of transmission line towers. Background technique [0002] The importance of overhead transmission lines is self-evident. Doing a good job in the inspection, operation and maintenance of overhead transmission lines and timely eliminating potential safety hazards in the power grid will play a very positive role in improving the safety and stability of power grid operations. [0003] With the rapid development of the scale of power grid construction, the contradiction between the number of overhead transmission lines and the number of inspection personnel has become increasingly prominent. The area of ​​the line is getting wider and wider, and there are more and more elements of operation and maintenance management. The existing single-line inspection operation and maintenance man...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 虢韬王伟沈平时磊杨渊罗鑫杨洋
Owner GUIZHOU POWER GRID CO LTD
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