Research on windage yaw characteristics of high-voltage insulators in complex wind field

Li, Jun; Dong, Mingqi; Zhu, Qingyu; Gao, Qiang

doi:10.1088/1757-899x/892/1/012113

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…When the along-wind displacement, y B , of the target point reaches its maximum value, the φ of the SIS reaches the maximum 􏽢 φ. According to equations ( 7)- (10), 􏽢 φ and its ESWLs can be calculated using y B as the load effect. ).…”

Section: Equivalent Static Wind Loads For Windage Yaw Anglementioning

confidence: 99%

“…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]. Wind loads have been obtained using a two-way fluid-structure interaction simulation by considering the local mountainous terrain and coastal typhoon meteorological conditions, and it was found that the complex wind field has a non-negligible influence on the φ of insulator strings [10]. Regarding the output problem, so far, the rigid straight rod (RSR) model is widely used as a simplified calculation method [11,12].…”

Section: Introductionmentioning

confidence: 99%

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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: Equivalent Static Wind Loads For Windage Yaw Anglementioning

confidence: 99%

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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“…Yan et al [16] corrected the normative calculation formula of the windage yaw angle of I-type insulator string by introducing the dynamic wind load coefcient, and combined with the calculation results of numerical simulation, gave the corresponding coefcients in diferent cases. Li et al [17] studied the infuence of complex wind farms on the windage yaw characteristics of insulator strings and compared the theoretical calculation with the simulation results. Yan et al [18] proposed the dynamic wind load coefcient in the formula for determining the swing angle of I-type insulator string through numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Buckling Analysis and Optimization Design of the Y‐Type Composite Insulator String

Bao¹,

Xia

Chai³

et al. 2022

Advances in Civil Engineering

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Under the action of extreme wind load, the overhead transmission line will lead to the fracture of the traditional V-type insulator string, which greatly affects the safety of the power system. Compared with the V-type insulator string, the Y-type insulator string has better stability under the wind load. Therefore, the overhead lines in the mountainous areas of Anhui Province are taken as the research object, considering the combined effect of wind load and conductor dead weight, and through theoretical derivation, the calculation formula of insulator string wind deflection angle is obtained. Using numerical simulation software, the nonlinear mechanical analysis of Y-type insulator strings is conducted, and under the action of different wind speeds, the windage yaw angle and unloading angle of the Y-type insulator string are obtained. Compared with the calculation results of the V-type insulator string, the stability of the Y-type insulator string in the structure is better than that of the V-type insulator string, and the Y-type insulator string can make full use of the distance between layers and the gap margin of the tower head, reduce the length of the cross arm, and reduce the weight of the tower, which has obvious advantages. Combined with the results of theoretical analysis and numerical simulation, the optimal design method of the Y-type insulator string is given. Under the condition of ensuring the safety and stability of insulators, the distance of the cross arm is shortened as much as possible and the weight of the transmission line tower is reduced. The research results will provide a theoretical reference for engineering design and improvement.

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Research on windage yaw characteristics of high-voltage insulators in complex wind field

Cited by 2 publications

References 4 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

Nonlinear Buckling Analysis and Optimization Design of the Y‐Type Composite Insulator String

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