Determination of the power transmission line ageing failure probability due to the impact of forest fire

Guo, You Guang; Chen, Runxin; Shi, Jing; Wan, Jie; Yi, Hong-Liang

doi:10.1049/iet-gtd.2018.0039

Cited by 26 publications

(23 citation statements)

References 28 publications

(55 reference statements)

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“…However, natural phenomena are of particular concern because they are influenced by climate change. Flame temperatures can reach up to 1000 °C to 1200 °C, thereby severely affecting tower structures, conductors, and operations [93], [94]. The conductors can be heated during long-term exposure to fire, as shown in Fig.…”

Section: ) Wildfirementioning

confidence: 99%

“…Consequently, the operating temperature of the transmission lines would be approximately higher 5 °C to 15 °C than the ambient temperature. High winds cause the line temperature to rise faster [93]. The interrelationship between the high flame caused by wildfire and the temperature rise from the line conductor is studied by using an ACSR conductor with a wildfire model.…”

Section: ) Wildfirementioning

confidence: 99%

“…The temperature can increase rapidly due to the heat transfer mechanism by convective and radiative heat loss. These two heat transfer methods influence the rise of surface temperature of the overhead conductor [93], [95], [96]. The ambient temperature near the affected area increases due to heat from the fire source, preventing the heat from dissipating from the conductor and accelerating the rise in the conductor temperature.…”

Section: ) Wildfirementioning

confidence: 99%

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Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

et al. 2020

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The overhead transmission line system is one of the methods of transmitting electrical energy at a high voltage from one point to another, especially over long distances. The demand for electrical energy is increasing due to the increase in the world population, the evolution of transport technology, and economic expansion, thereby resulting in overloading to the overhead line (OHL) system. In building new infrastructure for transmission lines, several issues need to be addressed. Thus, optimizing existing power by increasing the ampacity of power line is a practical solution to meet energy demand issues. During long-term operation, the temperature of OHL conductors may increase beyond their rated temperature, which is typically 75 °C for conventional conductors such as aluminum-conductor steel-reinforced cable. This condition is defined as thermal stress, which results in lower sag vertical clearance, tensile loss, elongation and creep, and reduced life span of the conductors. This condition must be avoided to ensure that the line is not permanently elongated, which can disrupt the vertical ground clearance, and to expand the conductor's life. Other factors such as lightning, wildfire, aging, and degradation of the conductor can also cause thermal stress on the conductors and have thermal effects on the conductor's performance. Therefore, unwanted thermal stress needs to be examined and identified by monitoring the thermal effect and behavior of the lines. This paper presents the state of the art in monitoring technologies that can be used to identify thermal stress on OHL conductors, including the issues and challenges in monitoring. At the end of this paper, a few suggestions are included to address the occurrence and assessment of thermal stress in lines. Ultimately, this work may provide complete information to researchers and maintenance engineers to enable them to make better decisions on condition monitoring, operation, and maintenance of the system. INDEX TERMS Overhead transmission line, thermal rating, conductor temperature, thermal stress effect, conditioning monitoring.

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Section: ) Wildfirementioning

confidence: 99%

Section: ) Wildfirementioning

confidence: 99%

Section: ) Wildfirementioning

confidence: 99%

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Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

et al. 2020

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“…Guo et al . [16] have evaluated the short‐term reliability of TLs considering the impact of forest fire on ageing. The condition monitoring data have been utilised to correct baseline failure rates of TLs in [17] and a joint method for quantifying negative impacts of both the natural ageing and the high load current has been proposed in [18].…”

Section: Introductionmentioning

confidence: 99%

Multi‐stage risk‐based dispatch considering short‐term reliability of transmission lines

Lou

Guo

Ding

et al. 2020

IET Generation, Transmission & Distribution

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“…Online monitoring of transmission lines is an important component of power transmission for the construction of smart grids, as well as an important technical means of realising the maintenance of transmission lines and improving their safe operating levels [1–3]. Study, detection and classification of cable galloping in power systems are thus deeply studied by a lot of researchers in the field since 1932 [4].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the transmission line galloping with a novel distributed optical fibre sensor and its statistical data analysis

Tang

Xiao

et al. 2019

IET Generation, Transmission & Distribution

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Determination of the power transmission line ageing failure probability due to the impact of forest fire

Cited by 26 publications

References 28 publications

Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

Multi‐stage risk‐based dispatch considering short‐term reliability of transmission lines

Monitoring of the transmission line galloping with a novel distributed optical fibre sensor and its statistical data analysis

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