The System Reliability Analysis of 1000kV UHV Transmission Tower Based on Moment Method

Li, Maohua; Li, Zhengliang; Yu, Dengke

doi:10.1016/j.egypro.2012.01.028

Cited by 9 publications

(5 citation statements)

References 1 publication

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“…is the yielding strength of main bar. It is a random variable, which is lognormal distributed [3,5], with a mean of and a variation of .…”

Section: Reliability Index Of the Main Bar Sectionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

“…In [2], the safety of power transmission line structures under wind and ice storms was evaluated. In [3], the reliability of a 1000kV UHV transmission tower considering icing was analyzed. In [4], the reliability analysis of a 75m tall steel microwave tower under wind load was presented.…”

Section: Introductionmentioning

confidence: 99%

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

Liu

Feng²

2019

Mathematical Problems in Engineering

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Transmission power towers play an important role in power delivery systems. In recent years, some important results on reliability of transmission towers have been obtained based on theoretical analysis, but there are very few practical application systems of real-time condition monitoring. This paper proposes a new real-time reliable condition assessment system for 500kV transmission power towers based on stress measurement. The necessity of such systems and the architecture of the online monitoring system will first be presented. Through calculating the stress distribution condition of different components of the transmission tower under typical working conditions, those positions with relatively high failure probability in the transmission tower can be identified monitored for installing the stress sensors on them. A new method is presented for calculating the reliability index of the transmission tower structure is also developed based on the mechanical structure of the tower. In particular, the tower structure is simplified to a series system, and the Ditlevsen’s bounds is used to estimate the reliability of the tower system. Finally, a designed example for the online reliable condition assessment procedure is given using a 500kV oxytropis tower as an illustration.

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“…is the yielding strength of main bar. It is a random variable, which is lognormal distributed [3,5], with a mean of and a variation of .…”

Section: Reliability Index Of the Main Bar Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Liu

Feng²

2019

Mathematical Problems in Engineering

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“…Reliability analysis in the industries of buildings, bridges have been extensively carried out, and target reliability indices have been calibrated in the aforementioned industries. However, very little research e ort has been conducted on reliability of transmission line system [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Reliability Calibration of Tower Members in Transmission Line System Crossing High‐Speed Railway

Feng

Gao

Feng³

2022

Advances in Civil Engineering

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Due to the rapid development of high-speed railway in China, transmission line systems across the high-speed railway system have become more prevalent in recent years, which highlights the importance of reliable design for systems. The design is generally based on the structural reliability theory, in which the determination of target reliability level is the key. To determine the reliability level of a transmission line across high-speed railway, the statistical parameters of load effects and resistances of tower members are derived and reliability calibration of tower elements satisfying the minimum design requirement in Chinese codes is performed by JC method. Furthermore, the reliability level of a transmission line across high-speed railway is divided into three classes, in which Class 1 is the strongest. According to the calibration results, the minimum target reliability indices are recommended. The results show that the reliability level is similar to the reliability of tower elements in the U.S. but higher than that in Canada. The target reliability indices with values of 3.7, 3.2, and 2.7 are recommended for Class 1, Class 2, and Class 3, respectively.

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“…How to prevent the occurrence of such incidents has been the focus of the research on transmission lines safety in these years [1][2][3].The steel structures of power tower will have a certain degree of deformation when there is an external force applied on them. Generally, this deformation is so small that it is difficult to observe it directly, but it can be measured by stress sensors.…”

Section: Introductionmentioning

confidence: 99%

A Safety Monitoring System for Power Tower Structure

Zheng¹,

Liu

Wang³

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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This paper studies the on-line monitoring safety system of the power tower structure. Firstly, it introduces the necessary of this system, then introduces the principle of stress measurement and the monitoring system structure. Secondly, it gives the method to calculate the safety index of tower structure. Finally, it describes the implementation and steps of the proposed method, and gives experimental results based on a series of measurement data samples from sensors.

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The System Reliability Analysis of 1000kV UHV Transmission Tower Based on Moment Method

Cited by 9 publications

References 1 publication

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

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

Reliability Calibration of Tower Members in Transmission Line System Crossing High‐Speed Railway

A Safety Monitoring System for Power Tower Structure

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