Experimental Research on the Influence of Wind Turbine Blade Rotation on the Characteristics of Atmospheric Discharges

Radičević, Branko; Savic, Milan

doi:10.1109/tec.2011.2162240

Cited by 24 publications

(19 citation statements)

References 12 publications

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“…Relationship between U 50% and v for a 2‐m gap: A, Radičević's experimental data and B, the experimental data of this study ( θ = 0°) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Test Resultsmentioning

confidence: 99%

“…In previous studies, [14][15][16] a discharge test for a static and rotary wind turbine with a 2-m gap is conducted. In the test data, the angle is set as 0°, when the wind turbine is stationary.…”

Section: Comparison Of Test Resultsmentioning

confidence: 99%

“…Currently, there is no rigorous observation data to prove that blade rotation affects the lightning‐attracting ability of wind turbines. Furthermore, because the maximum gap distance in the previous test is not more than 2 m, the leader propagation is insufficient. The effectiveness of simulation to determine the influence of rotation on lightning discharge still must be verified.…”

Section: Introductionmentioning

confidence: 99%

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Influence of blade rotation on the lightning stroke characteristic of a wind turbine

Wang

Deng

et al. 2019

Wind Energy

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The blades of a wind turbine rotate during normal operation. To investigate the influence of blade rotation on the lightning‐attracting ability of a wind turbine, a discharge test platform is designed for scaled wind turbines. The 50% impulse voltages and flash probabilities of the scaled wind turbines with gap distances of 1 to 8 m in the static and rotary conditions are determined by using the discharge test and selective discharge test. The discharge test for a single wind turbine with a gap of 1 to 2 m indicates that the breakdown voltages of the gap between the scaled turbine and electrodes increases with an increase in the blade rotation speed. However, the discharge test with a gap distance of 4 to 8 m indicates that the breakdown voltage of the fan decreases with an increase in the blade rotation speed. The test results of the scaled dual wind turbines experiment have the same rules. To explain this phenomenon, the influence of wind speed on the space‐charge distribution and electrical field intensity of corona discharge is simulated in the background of a target thundercloud. The rotation of the fan reduces the space‐charge density near the area of the blade tip, which leads to an increase in the field strength near the blade tip of the wind turbine and a decrease in the field strength away from the blade tip. This influence varies in short and long air gap, resulting in opposite relationships between discharge voltage and distance from the tip of the turbine. The results can provide a reference for the lightning protection of wind turbines.

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Section: Test Resultsmentioning

confidence: 99%

Section: Comparison Of Test Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of blade rotation on the lightning stroke characteristic of a wind turbine

Wang

Deng

et al. 2019

Wind Energy

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“…To verify the objectiveness of the test results, they were compared with those of a study by Radičević [13]. In Radičević's study, the test was conducted under three wind turbine operating conditions (v = 0 m/s with one blade straight up, v = 31 m/s, and v = 50 m/s; v is the linear velocity of the blade tip, which was calculated using Equation (1)) with the same impulse voltage waveform and test method used in the present study.…”

Section: Summary Of the Test Resultsmentioning

confidence: 99%

“…Radičević and colleagues first investigated the influence of wind turbine blade rotation on the characteristics of atmospheric discharge [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Wind Turbine Blade Rotation on Triggering Lightning: An Experimental Study

Wen

Wang

et al. 2016

Energies

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Abstract:Compared with other lightning targets on the ground, the most notable feature of a wind turbine is that the blades are usually in a rotating state when lightning strikes. To study the mechanism of blade rotation influencing wind turbine on triggering lightning, lightning discharge comparison tests based on a typical 2-MW 1:30-scaled wind turbine model with an arching high-voltage electrode were conducted under different modes of stationary and rotating blades. Negative polarity switching impulses of 250/2500 µs were applied to the arching electrode. The up-and-down method was adopted for 50% discharge voltage and the discharge process was observed. The experimental results showed that under the condition of a 4 m gap, the breakdown voltage decreases and the connection point of the leaders approaches the high-voltage electrode with increasing blade speed, indicating that the wind turbine's blade rotation enhances the triggering of lightning. The analysis showed that the blade rotation could be altering the charge distribution on the blade tip, resulting in varied ascending leader development on the blade tip, which affected the discharge development process.

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Discharge path observation and the statistical characteristics of discharge paths for long–air gap discharge for in‐operation wind turbines

et al. 2020

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When a wind turbine is in normal operation, the blades are rotating, and this blade rotation may affect the process of lightning striking the wind turbine. To investigate this problem, long-gap discharge tests are performed in this study. Moreover, a multiple physical parameter synchronous observation platform is designed for a scaled wind turbine. Long-gap discharge tests of a static and rotary-scaled wind turbine with blade tip-electrode gap distances of 1 to 8 m are conducted, and the discharge paths under different gaps and wind turbine operating conditions are obtained. The characteristic parameters-arc shape upon discharge, lengths of the downward and upward leaders, blade angle at the moment of discharge, and angle of upward leader initiation-are statistically analyzed. The analysis of the aforementioned data indicates that rotation has opposite effects on the discharge characteristic parameters under short and long gap distances. According to the analysis, blade rotation reduces the space charge density of the corona discharge near the tip, which leads to an increase in the field strength near the blade tip and a decrease in the field strength away from the blade tip. Short and long gaps have different degrees of influence on discharge, which changes the difficulty of upward leader initiation at the blade tip and consequently alters the entire discharge process. The obtained results can provide a reference for the lightning protection of wind turbines. K E Y W O R D Sblade rotation, discharge path, long-gap discharge, wind turbine

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Experimental Research on the Influence of Wind Turbine Blade Rotation on the Characteristics of Atmospheric Discharges

Cited by 24 publications

References 12 publications

Influence of blade rotation on the lightning stroke characteristic of a wind turbine

Influence of blade rotation on the lightning stroke characteristic of a wind turbine

Effect of Wind Turbine Blade Rotation on Triggering Lightning: An Experimental Study

Discharge path observation and the statistical characteristics of discharge paths for long–air gap discharge for in‐operation wind turbines

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