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Energies 2017, 10(12), 1995; https://doi.org/10.3390/en10121995

Studies on an Electromagnetic Transient Model of Offshore Wind Turbines and Lightning Transient Overvoltage Considering Lightning Channel Wave Impedance

1
School of Electrical Engineering, Shandong University, Jinan 250061, China
2
Shandong Provincial Key Lab of UHV Transmission Technology and Equipment, Jinan 250061, China
*
Author to whom correspondence should be addressed.
Received: 12 October 2017 / Revised: 16 November 2017 / Accepted: 24 November 2017 / Published: 1 December 2017
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Abstract

In recent years, with the rapid development of offshore wind turbines (WTs), the problem of lightning strikes has become more and more prominent. In order to reduce the failure rate caused by the transient overvoltage of lightning struck offshore WTs, the influencing factors and the response rules of transient overvoltage are analyzed. In this paper, a new integrated electromagnetic transient model of offshore WTs is established by using the numerical calculation method of the electromagnetic field first. Then, based on the lightning model and considering the impedance of the lightning channel, the transient overvoltage of lightning is analyzed. Last, the electromagnetic transient model of offshore WTs is simulated and analyzed by using the alternative transients program electro-magnetic transient program (ATP-EMTP) software. The influence factors of lightning transient overvoltage are studied. The main influencing factors include the sea depth, the blade length, the tower height, the lightning flow parameters, the lightning strike point, and the blade rotation position. The simulation results show that the influencing factors mentioned above have different effects on the lightning transient overvoltage. The results of the study have some guiding significance for the design of the lightning protection of the engine room. View Full-Text
Keywords: offshore wind turbines (WTs); electromagnetic transient model; lightning transient overvoltage; lightning channel wave impedance; lightning protection offshore wind turbines (WTs); electromagnetic transient model; lightning transient overvoltage; lightning channel wave impedance; lightning protection
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Zhang, L.; Fang, S.; Wang, G.; Zhao, T.; Zou, L. Studies on an Electromagnetic Transient Model of Offshore Wind Turbines and Lightning Transient Overvoltage Considering Lightning Channel Wave Impedance. Energies 2017, 10, 1995.

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