Method for the Development of Galloping Distribution Maps for Overhead Transmission Lines

Yang, Jialun; Liu, Bin; Zhao, Bin; Liu, Yaduo

doi:10.1109/tpwrs.2021.3101664

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…There were more transmission line infrastructure projects for Shandong power grid in recent years, but along with the abnormal rise in temperature of global climate, as well as China's extreme weather were processing more frequent, the power grid suffered from extreme heavy rain, snow, ice, wind, and other severe weather more and more frequently [1,2]. According to the galloping distribution map of Shandong power grid [3,4] released by the State Grid Corporation in recent years in 2021, there is a higher risk of line infrastructure projects in Shandong being affected by galloping faults.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Typical Galloping Shandong 500kV Wendeng Line in 2021

He,

Zhang,

Chen

et al. 2023

Advances in Transdisciplinary Engineering

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In November 2021, 500kV Wendeng pumped storage infrastructure projects in Shandong were affected by extreme bad weather, continuously galloping occurred on key devices, which resulted in damaging to some conductors and fittings and equipment, and brought large losses to the construction of Shandong power grid. To understand and prevent similar galloping disasters, the main amplitude and frequency characteristics of galloping were clarified by analyzing the topography around, the line’s design parameters and the observation data on site. Then by reviewing the local weather process, clear the weather process of temperature, precipitation, wind direction and other elements before and after the occurrence of galloping, and combined with applied mechanics modelling and analysis, to clarify the quantitative inducing factors of galloping, proposed for galloping characteristics of the analysis of applied mechanics methods for the infrastructure line, provided a theoretical basis and technical support to prevent galloping for the subsequent transmission line infrastructure projects in the power grid in Shandong as well as in China.

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Section: Introductionmentioning

confidence: 99%

Analysis of Typical Galloping Shandong 500kV Wendeng Line in 2021

He,

Zhang,

Chen

et al. 2023

Advances in Transdisciplinary Engineering

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“…In 2018, galloping accidents occurred on a total of 77 high-voltage transmission lines of the Hubei power grid, resulting in tripping of 19 transmission lines, and over eight towers, nine wires and five interphase spacers were damaged. The phenomenon of transmission line galloping poses a great threat to the normal and safe operation of power grid systems and even causes great economic losses and has serious social influence [4]. Therefore, it is of very important practical application value to simulate the occurrence of actual line galloping; explore the influence of galloping on conductors, towers, fittings and components; and enrich the understanding of transmission line galloping.…”

Section: Introductionmentioning

confidence: 99%

Design of an Electromagnetism-Based Transmission Line Galloping Test System

et al. 2022

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Existing transmission line full-scale tests rely on natural winds and have low test efficiency. In this paper, taking a reduced-scale test line with a 35.4 m span as an example, an electromagnetism-based transmission line galloping test system is designed. The plunger electromagnet periodically provides mechanical energy which vibrates the wire system in place of complex pneumatic loads. The finite element model of the electromagnet device is established and the influence of related parameters is analyzed. The power supply and control circuit of the excitation device are designed. The vibration of the transmission line is monitored by accelerometers and the displacement calculation method based on discrete wavelet transform (DWT) is proposed. Considering the geometric nonlinearity of the wire system, an adaptive excitation method based on wavelet decomposition and reconstruction of the acceleration signal is proposed. The vibration response of the wire under different coil currents and excitation modes is monitored and analyzed. The results show that the actual line galloping can be simulated by the designed electromagnetic system, the vibration frequency is close to the second natural frequency and the vibration amplitude can be controlled by changing the coil current.

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“…Transmission line galloping is a self-excited vibration with long time and large-scale vibration, thus causing damage to transmission towers, insulator strings, connecting fittings, etc. (Lu et al , 2019; Yang et al , 2021). However, there is still a lack of experimental research on galloping damage and anti-galloping technology.…”

Section: Introductionmentioning

confidence: 99%

Integrated numerical simulation of an electromagnetic transmission line galloping excitation test system

Zhang

Ruan

Huang

2022

COMPEL

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Purpose This paper aims to establish the mathematical model and solve the complex calculation multi-field coupling problem for an electromagnetic overhead transmission line galloping excitation test system. Design/methodology/approach An electromagnetic excitation test system is introduced. To calculate the vibration response of the transmission line, a transient coupled finite element model containing electromagnetic repulsive mechanism and transmission line system was established. Considering the advantages of Newmark-ß algorithm and fourth-order Runge–Kutta algorithm, the two algorithms are combined to solve the model. Compared with the simulation results of existing commercial finite element software, the accuracy of the calculation model of electromagnetic force and wire vibration response are verified. Findings Comparison results show that the proposed calculation model can accurately obtain the force of electromagnetic mechanism and the vibration response of the overhead power lines, and improve the calculation efficiency. The calculation results show that vibration under electromagnetic excitation presents a double half-wave mode, and the galloping amplitude varies according to the charging voltage. Originality/value This paper built the transient simulation model for a galloping test system. The Newmark-ß algorithm and the fourth-order Runge–Kutta algorithm are used to solve the model. The research results are of great significance for the actual galloping test system design.

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Method for the Development of Galloping Distribution Maps for Overhead Transmission Lines

Cited by 8 publications

References 2 publications

Analysis of Typical Galloping Shandong 500kV Wendeng Line in 2021

Analysis of Typical Galloping Shandong 500kV Wendeng Line in 2021

Design of an Electromagnetism-Based Transmission Line Galloping Test System

Integrated numerical simulation of an electromagnetic transmission line galloping excitation test system

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