Research on On-Line Monitoring of Transmission Tower Stress

Abstract

This paper studies the on-line monitoring system of transmission tower stress.Firstly, it introduces the necessary of this system, gives its system architecture. Then it presents an algorithm to determine the stress sensors' installation points on the tower, which based on finite element analysis. Through calculating the stress distribution condition of different components of the transmission tower under typical working condition, these points with relatively higher failure probability in the transmission tower can be monitored by installing stress sensors on them. Finally, it uses a 500kV oxytropis tower as an example to show the algorithm flow.

A Real‐Time Reliable Condition Assessment System for 500kV Transmission Towers Based on Stress Measurement

“…The system architecture of the real-time reliable condition assessment system has been introduced in our previous work [1]. Particularly, the monitoring system works in the field and must consider communication, power supply, and waterproofing of equipments.…”

“…By calculating and comparing the force of the tower the force of the tower, those positions with relatively high failure probability in the transmission tower can be identified for installing the stress sensors. The procedure has been described in our previous work in detailed [1].…”

“…For example, many transmission towers were wrecked in South China in 2008 due to a large-scale ice disaster, which caused catastrophic damages to China power grid. Preventing the occurrence of such incidents has been research focus on transmission lines safety in recent years [1][2][3]. In the transmission tower-line system, towers should bear its weight and those of the lines, by producing a certain tension load for hanging the lines.…”

“…In particular, measured stress data from strain/stress sensors installed in the tower is used to evaluate the reliability of the structure. To this end, the positions of stress sensors need to be determined and a method based on finite element analysis is proposed in our previous work [1]. It calculates the stress distribution of different components of transmission tower under typical working condition, and finds the positions with relatively higher failure probability.…”

“…The rest of the paper is organized as follows: Section 2 introduces the proposed system architecture and method to determine the installation positions of the stress sensors on the tower, which are our previous work [1]. Section 3 discusses the proposed approach to assess the reliability of transmission tower structure based on the sensor measurements.…”