Study on windage yaw calculation and real‐time warning method of Shanxi power grid considering microclimate and micro‐terrain factors

Shao, Jian‐Wei; Wang, Junhua; Long, Mengjiao; Wang, Jingjing; Tang, Yali; Sun, Mingui

doi:10.1002/tee.22617

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…e dynamic magnification effect of the fluctuating wind in the wind yaw calculation cannot be ignored [7]. Furthermore, the microclimate and microterrain factors affect the wind loads for windage yaw calculation [8]. Under rain and wind conditions, negative aerodynamic damping can occur, and the peak swing amplitude of overhead conductors is larger than that under the wind alone, such that rain loads cannot be neglected [9].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Windage Yaw Angle and Dynamic Wind Load Factor of a Suspension Insulator String

Zhao

Yue

Savory

et al. 2022

Shock and Vibration

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A simplified calculation method is proposed for determining the peak dynamic windage yaw angle φ ^ of electricity transmission line (TL) tower suspension insulator strings (SISs). According to the rigid-body rule, the geometric stiffness matrix in the calculation of the windage yaw angle φ of SISs is dominated by the average wind loads, while the fluctuating wind loads are the dominant factor in the elastic stiffness. With the average wind state of conductors as the initial calculation condition, the load-response-correlation (LRC) method can be used to determine the fluctuating windage yaw angle φ d and the corresponding equivalent static wind loads (ESWLs). Then, the improved rigid straight rod model, which uses the actual length of conductors rather than the projected length, was used to determine the average windage yaw angle φ ¯ . Through the linear superposition of the horizontal increments of φ ¯ and φ ^ d (the peak value of φ d ), the formulae to calculate the φ ^ of SISs were derived. Additionally, the formulae for the dynamic wind load factor, β c , which is a key factor in designing wind loads for φ , were derived according to the principle of ESWLs, rather than being empirically determined by the Chinese code. Thus, the calculation model regarding the loads and response for the φ of SISs was established, and an actual TL was used to verify the established calculation model. Afterward, the influence of the different engineering design parameters on φ and its β c were analyzed. The parameter analyses show that the wind speed, span, and ground roughness influence the magnitudes of φ ^ and β c , however, the height difference between the two suspension points of the conductors, the nominal height, and the sag-to-span ratio may be neglected in the approximate calculation. Our method offers a new solution to TL design when there are large deformations and small strains.

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Section: Introductionmentioning

confidence: 99%

Dynamic Windage Yaw Angle and Dynamic Wind Load Factor of a Suspension Insulator String

Zhao

Yue

Savory

et al. 2022

Shock and Vibration

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“…As transmission lines are exposed to the natural environment for a long time, complex environmental factors, such as lightning strike, wind-induced vibration, gas corrosion and ice coating, act directly on the conductor. The structure of the transmission line will inevitably be damaged, and line breaking accidents will occur in serious cases [1].In recent years, with the development of sensors and detection technology, a large number of online monitoring devices for transmission lines, such as galloping [2], windage yaw [3], vibration [4] and lightning strike [5], have appeared all over the world. Although these methods can monitor the motion status and environmental status, they cannot reflect the structural state of the transmission line conductor.…”

Section: Introductionmentioning

confidence: 99%

A structural health monitoring system of the overhead transmission line conductor

Zhao

Tian

Huang

et al. 2021

IET Science Measure & Tech

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Transmission lines are affected by aeolian vibration, sandstorms and acid rain, which cause structural damage and eventually lead to line breaking accidents. In this paper, the structural health monitoring technology of conductors is researched, and a structural monitoring system for conductors is designed. First, based on the structure of the ACSR (Aluminum Conductor Steel Reinforced) conductor and the dynamic equation, the relation between the natural frequencies and the structure of the conductor is obtained. Then, an online health monitoring system of the conductor structure is proposed, and key issues, such as the power supply solution of sensors, data preprocessing technology, multiple-sensor synchronization method, are analyzed in detail. Finally, the structural health monitoring of overhead transmission lines designed in this paper is tested on 110-kV experimental transmission lines. The experimental results show that from the system proposed the operation parameters of the conductors can be well obtained.

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Multimodal analysis of saddle micro-terrain prone to wind disasters on overhead transmission lines

Deng,

Jiang,

Wang

et al. 2024

Electric Power Systems Research

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Study on windage yaw calculation and real‐time warning method of Shanxi power grid considering microclimate and micro‐terrain factors

Cited by 3 publications

References 8 publications

Dynamic Windage Yaw Angle and Dynamic Wind Load Factor of a Suspension Insulator String

Dynamic Windage Yaw Angle and Dynamic Wind Load Factor of a Suspension Insulator String

A structural health monitoring system of the overhead transmission line conductor

Multimodal analysis of saddle micro-terrain prone to wind disasters on overhead transmission lines

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