Multiple wind turbines shielding model of lightning attractiveness for mountain wind farms

Nie, Jiayi; Xiang, Nianwen; Li, Kejie; Chen, Weijiang

doi:10.1016/j.epsr.2023.109727

Electric Power Systems Research

2023

DOI: 10.1016/j.epsr.2023.109727

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Multiple wind turbines shielding model of lightning attractiveness for mountain wind farms

Jiayi Nie

Nianwen Xiang

Kejie Li

et al.

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2024

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Cited by 2 publications

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Investigation of Upward Leader Development Characteristics by Two Kinds of Charge Density Models in Wind Turbines

Fan,

Cai,

et al. 2024

Wind Energy

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The upward discharge is a significant factor threatening the operation of wind farms. This paper investigates the inception and development of upward leaders of wind turbines' tip, where blade rotation prevents charge accumulation, using charge density models from laboratory discharges and artificially triggered lightning. The results indicate that larger return stroke currents create higher spatial potentials, and slower downward leader speeds allow for longer development time, favoring the development of upward leaders. As wind turbine sizes increase, the rotation of the blade tips resembles artificially triggered lightning, and the long air gap discharge model may underestimate the development of upward leaders. Calculations from the artificially triggered lightning model reveal improved upward leader formation when further laterally away from the downward leader within a certain distance, elucidating why multiple upward leaders are frequently observed around turbines. The striking distance and attractive radius are largely determined by the development of upward leaders. The absence of corona charge shielding at blade tips means upward leader inception is independent of downward leader velocity, emphasizing downward leaders' significant influence on turbines. Thus, the formula for estimating a wind turbine's lightning incidence requires integrating the return stroke current and velocity of the downward leader.

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Investigation of Upward Leader Development Characteristics by Two Kinds of Charge Density Models in Wind Turbines

Fan,

Cai,

et al. 2024

Wind Energy

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Green Heat and Wind Factors in Sustainable Urban Development of Mountain-Basin Relief

Shukurov,

Olimova,

Shukurova

et al. 2024

E3S Web Conf.

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The article studies mountain basin relief’s influence on the heat and wind regime organization when developing it for sustainable urban planning purposes. Each time a unique relief is identified, it requires an individual design approach taking into account the identification of the aesthetic expressiveness of green settlement development. Depending on the slope, there may be different options for using the site. The article presents the features of the geometry of the mountain-basin space associated with the relative depth of the mountain basin. The thermal field of the mountain-basin space, which is formed due to the energy of incoming solar radiation and the internal heat of insolated urban development, is analyzed. The city’s mountain-basin terrain requires an individual design approach, taking into account the identification of the aesthetic expressiveness of green settlement development. Based on the generalization and analysis of studies of air flows’ structure, their direction, velocity, and temperature fields, as well as the characteristics of the microclimate in the development of the mountain-basin space, an aerodynamic picture of air movement arising under the influence of natural thermal forces was obtained. The thermal field of the mountain-basin space has been established, which is formed due to the energy of incoming solar radiation and the internal heat of insolated urban development. The proposed methodology for calculating the heat and wind conditions of development is the basis for preliminary forecasting, assessment, and regulation of heat and wind parameters, as well as optimization of the sustainable development planning of mountain-basin relief.

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Multiple wind turbines shielding model of lightning attractiveness for mountain wind farms

Cited by 2 publications

References 18 publications

Investigation of Upward Leader Development Characteristics by Two Kinds of Charge Density Models in Wind Turbines

Investigation of Upward Leader Development Characteristics by Two Kinds of Charge Density Models in Wind Turbines

Green Heat and Wind Factors in Sustainable Urban Development of Mountain-Basin Relief

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