On the lightning incidence to wind farms

Long, Mengni; Becerra, Marley; Thottappillil, Rajeev

doi:10.1109/iclp.2016.7791459

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…In 1993, IEEE proposed the method of exposed distance to calculate interception efficiency of blade LPS [13]. Consistent with the assumptions previously made in this paper, this method also assumes that the downward leader develops vertically downwards.…”

Section: Calculation Methods Of Lps Efficiency Based On the Egmwbmentioning

confidence: 87%

Dynamic striking distance and electrical geometrical model of wind turbine blades based on lightning physics

Zhang

et al. 2017

J. eng.

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Section: Calculation Methods Of Lps Efficiency Based On the Egmwbmentioning

confidence: 87%

Dynamic striking distance and electrical geometrical model of wind turbine blades based on lightning physics

Zhang

et al. 2017

J. eng.

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“…where I B is the boundary current and given by I B (𝜃) = e ln((H (𝜃)∕4.9)∕0.85) (13) Then, the equivalent lightning collection area demonstrates that the number of lightning strikes in a certain area is the same as the number of lightning strikes intercepted by objects. As represented in Figure 11a, the equivalent collection area of the wind turbine with symmetrical wind turbine blades can be expressed as…”

Section: The Calculation Methodsmentioning

confidence: 99%

Quantitative characteristics of the striking distance to wind turbine blades based on an improved stochastic lightning model

Bian

Zhou

et al. 2023

IET Generation Trans & Dist

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The damage of wind turbines suffered from lightning strikes has been a key issue for the safe and reliable operation of wind farms. Accurate determination of the annual lightning flash number to a wind turbine is essential for designing proper lightning protection measures. The interaction of downward and multiple upward leaders (MULs) is studied in this paper, which also considers the stochastic nature and branched behaviour of the lightning attachment phenomenon. Firstly, with an improved stochastic lightning model, the relationship among the striking distance, the height of wind turbines and the return stroke current is established. Moreover, a modified method for predicting the annual lightning flash number strikes to a wind turbine is proposed. The simulation results show that the striking distance and the collection area not only depend on the return stroke current, but also on the height and blade angle. Besides, the comparations between the calculation results and field statistics indicate that the conventional electric geometry model is not satisfied with the need of lightning protection for wind turbines. Note that there is only a difference of 4% between the modified method and the observation value. These quantitative researches provide the guidance of calculation results for the optimization of the blade lightning protection system (LPS) design.

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“…Simulation work has been done towards the mechanism of upward leader inception from wind turbines [12]. The conditions for an upward leader to incept from different receptors were judged, and the protection area of the receptors were analyzed [13]. However, the blade surface near the receptor is still sometimes hit by lightning strikes even if the protection areas of the two receptors overlap with each other by theoretical calculation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Lightning Attachment Manner to Wind Turbine Blades With Lightning Protection System

Zhang

et al. 2019

IEEE Trans. Plasma Sci.

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Different types of lightning protection systems (LPS) have been developed for wind turbines to protect the blades from lightning strikes. However, severe damages caused by lightning strikes still happen frequently, which creates huge costs. Experiments using a 5m blade specimen with tip receptors from 1.5 MW wind turbine blades under 3 m air gap were conducted to investigate the lightning attachment manner to the wind turbine blade with LPS in different situations. Factors including polarity of the lightning strikes, orientation of the blade and the lateral distances between the wind turbine blade and the lightning downward leader were taken into account. It was found that the types of the discharge path under positive and negative lightning strikes are quite different, and the positive discharges are much more dangerous to wind turbine blade than the negative ones. The lateral distance between the downward leader and the wind turbine blade is a key factor that influences the interception efficiency. Three types of receptor interception failure were discovered. Multiple upward leaders may incept from the blade body as to intercept the downward leader. However, the protection range of the tip receptor is quite limited, and the connection of the tip receptor and the blade body is the most vulnerable position hit by the lightning strikes. The results present useful reference to optimal design of the wind turbine blade LPS.

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On the lightning incidence to wind farms

Cited by 7 publications

References 16 publications

Dynamic striking distance and electrical geometrical model of wind turbine blades based on lightning physics

Dynamic striking distance and electrical geometrical model of wind turbine blades based on lightning physics

Quantitative characteristics of the striking distance to wind turbine blades based on an improved stochastic lightning model

Experimental Study on Lightning Attachment Manner to Wind Turbine Blades With Lightning Protection System

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