Local connection looseness identification method and apparatus for power transmission tower

A technology of loose connection and identification method, which is applied in the field of transmission towers, can solve problems such as difficult to meet the requirements of identification accuracy and sensitivity, and achieve the effect of preventing catastrophic accidents and strong applicability

Active Publication Date: 2018-10-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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AI Technical Summary

Benefits of technology

This patented technology helps identify any issues that may occur during operation at high altitudes where wind turbines experience severe environmental factors such as extreme weather events like rain storms. It uses measurements from different parts of the tower to estimate its overall strength and rigidity based on these flexible parameters. By comparing this data against reference values stored previously, we aimed towards finding areas likely causing failures along specific locations within the tower. These technical effectings include improved monitoring capabilities and effective detection strategies for structures undergoing sudden changes caused by external forces while still being able to accurately locate weak points without requiring detailed knowledge about their materials characteristics.

Problems solved by technology

This patented technical problem addressed in this patents relates to identifying weak points that may lead to failure or other issues with transmitting equipment due to changes over time caused by factors like temperature fluctuations, mechanical stressings, environmental conditions such as rainwater, snow cover, etc., which could cause cracks on the surface of the material being transported through the system.

Method used

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  • Local connection looseness identification method and apparatus for power transmission tower
  • Local connection looseness identification method and apparatus for power transmission tower
  • Local connection looseness identification method and apparatus for power transmission tower

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Embodiment Construction

[0035] Embodiments of the present invention provide a method and device for identifying local loose connections of transmission towers, capable of monitoring and diagnosing faults on transmission tower structures.

[0036] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] see figure 1 , an embodiment of a method for identifying a local connection loosening of a transmission tower provided

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Abstract

The invention provides a local connection looseness identification method and apparatus for a power transmission tower. The method comprises the steps of calculating a flexibility matrix of the powertransmission tower before and after local looseness according to a vibration mode and an inherent frequency of the power transmission tower before and after local looseness, wherein the flexibility matrix comprises all flexibility coefficients of measurement points of the power transmission tower; calculating damage indexes of the measurement points, wherein the damage indexes are equal to maximumflexibility coefficient change quantities of the measurement points after local looseness divided by maximum flexibility coefficients of the measurement points before local looseness; and amplifyingthe damage indexes, calculating ratios of the amplified damage indexes, and determining the measurement point corresponding to the maximum ratio as a local looseness position of the power transmissiontower.

Description

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Claims

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Application Information

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Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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