Real-time online evaluation method and system for safety state of power transmission tower

Abstract

The invention discloses a real-time online evaluation method and system for a safety state of a power transmission tower. The method comprises: acquiring wind speed, wind direction, lead wire icing thickness and temperature information by utilizing a detection instrument mounted on the power transmission tower, and transmitting the information to a sub-processor; establishing a finite element model of a line-tower coupling system of the power transmission tower by utilizing the sub-processor; loading the acquired information into the finite element model of the line-tower coupling system of the power transmission tower established in the step 2; by utilizing a calculation module in the sub-processor, obtaining an integral structure stress condition of a power transmission line according to the step 3, and performing extractive analysis on counter point displacement, a slenderness ratio, tension and bending stresses, compressed bar stability and axial force; and transmitting an extractive analysis result in the step 4 to a main processor through a wireless network by the sub-processor. According to the real-time online evaluation method and system, a pre-warning signal can be triggered when the power transmission line is in special climate or a running condition of the line is seriously abnormal by monitoring and evaluating the structural state of the power transmission tower, thereby providing basis and guidance for safety operation maintenance and management decision of the power transmission line.

Description

technical field [0001] The invention relates to the field of transmission line equipment maintenance, in particular to a method and a system for real-time online assessment of the safety state of a transmission tower. Background technique [0002] Transmission towers are an important part of overhead transmission lines, and play the role of supporting conductors, ground wires and other accessories. In recent years, the installed capacity and voltage level of the State Grid have been continuously improved, and the transmission towers have developed rapidly in the direction of towering, large-span and ultra-high voltage. Higher requirements are placed on the reliability and economy of the tower. However, transmission towers that have been in use for a long time currently account for a considerable proportion of the current domestic transmission network. With the increase in service life, due to the effects of natural factors such as the environment, climate, and human acciden...

AI Technical Summary

Problems solved by technology

However, transmission towers that have been used for a long time currently account for a considerable proportion of the current domestic transmission network. Once the transmission tower is damaged, it will directly affect the normal operation of the entire power system, not only causing huge economic losses, but even causing the paralysis of the entire power supply system.

The construction and maintenance of large-scale transmission lines requires a lot of manpower, material and financial resources, and the comprehensive monitoring and evaluation methods lagging behind the construction and development of transmission lines make it impossible for management and decision-makers to make objective and accurate assessments of their overall performance. Therefore, it is also impossible to adopt low-cost, high-efficiency maintenance methods

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