A study on swing and buckling of Y-type insulator strings under strong wind action for &amp;#x00B1;800kV UHDV transmission lines

Liu, Bin; Liu, Caolan; Zhu, Kun Yan; Liu, Shengchun

doi:10.1109/appeec.2013.6837138

Cited by 3 publications

(5 citation statements)

References 3 publications

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“…When the wind speed is large enough, due to structural and other factors, the insulators on the leeward side will be subjected to diferent degrees of pressure, and the composite insulator string will buckle under the pressure. Te insulator string still has a certain bearing capacity after buckling [33][34][35]. Terefore, it is necessary to conduct buckling analysis on the rod core.…”

Section: The Buckling Analysis Of the Insulator Stringmentioning

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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Section: The Buckling Analysis Of the Insulator Stringmentioning

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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show abstract

“…Literatures [17,18] have summarized the wind deflection calculation methods for foreign V-type insulator strings and studied the bearing capacity of the leeward limb of the V-string. The wind deflection and buckling characteristics of Y-shaped insulator strings under strong winds have been studied in the literatures [19,20]. The above studies have been carried out on type I and type V insulator strings and fewer studies have been carried out on the wind deflection characteristics of Y-type insulator strings under pulsating winds.…”

Section: Introductionmentioning

confidence: 99%

Study on the Wind Deviation Characteristics of Y-Type Insulator String under the Action of Strong Wind

Wang,

Yang,

Zhang

et al. 2024

Advances in Civil Engineering

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Under the action of extreme wind load, the overhead transmission line will generate a wind deflection flashover phenomenon, which seriously affects the normal operation of the transmission system and causes significant losses. Y-type insulator string (hereinafter referred to as Y-string) is an optimized structural form to reduce the wind deflection flashover in windy areas, and the dynamic mechanical characteristics of Y-string under the action of pulsating wind is an important factor that influences the design of the overhead transmission line. The calculation method of pulsating wind load and the static calculation method of wind deflection displacement of Y-string are obtained through theoretical derivation. The mathematical software is used to simulate the time course of pulsating wind speed and convert it into the time course of wind load, establish the finite element model of insulator string, simulate and analyze the wind deflection process of Y-string under the action of pulsating wind by using the finite element method, and calculate the horizontal displacement of Y-string under the excitation of pulsating wind and make a comparative analysis with the results of the static calculations. The results show that the wind deflection displacement of the Y-string under pulsating wind is 1.12–1.28 times that under steady-state wind, which reveals the reason for the wind deflection flashover phenomenon and provides theoretical references for the design and improvement of overhead transmission lines.

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“…Y-type insulator string combines the characteristics of I-type and V-type insulator string together, can prevent windage yaw, improve flashover voltages under wet and pollution conditions, improve the height of conductor, and compress the length of cross arm and the corridor width. Hence, it has advantages of external insulation and reduction of corridor width [5,6]. At home and abroad, researches have been made for conventional I-type and V-type insulator strings, about the electromagnetic environment, external insulation characteristics, structural properties and so on [2][3][4]6].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it has advantages of external insulation and reduction of corridor width [5,6]. At home and abroad, researches have been made for conventional I-type and V-type insulator strings, about the electromagnetic environment, external insulation characteristics, structural properties and so on [2][3][4]6]. The results under appropriate research methods have been applied in practical engineering.…”

Section: Introductionmentioning

confidence: 99%

“…The results under appropriate research methods have been applied in practical engineering. The research of Y-type insulator string mainly focuses on external insulation test and mechanical performance [5,6]. China Electric Power Research Institute (EPRI) carried out a research about flashover characteristic of Y-type insulator string under pollution of DC transmission line.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Grading Ring Parameters' Design for Y-Type Insulator String of 1000kV AC Double-Circuit Transmission Line

Feng

Fan

et al. 2015

AMM

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Y-type insulator string has advantages of external insulation and reduction of corridor width. This paper establishes a 3D finite element model of Y-type composite insulator string of 1000 kV AC double-circuit transmission line, including tower, insulator, grading rings, phase conductors and other hardware fittings, the model is used to calculate electric field distribution of composite insulator and grading ring. Then the parameters of grading ring are optimized based on the electric field results. According to the results, the optimum parameters of the racetrack grading ring are R=700 mm, r=120 mm, H=200 mm. The results can give a reference for design of UHV AC Y-type insulator string.

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A study on swing and buckling of Y-type insulator strings under strong wind action for ±800kV UHDV transmission lines

Cited by 3 publications

References 3 publications

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

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

Study on the Wind Deviation Characteristics of Y-Type Insulator String under the Action of Strong Wind

Grading Ring Parameters' Design for Y-Type Insulator String of 1000kV AC Double-Circuit Transmission Line

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