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Optimized Design of Wind Turbine Blade Receptors Based on Electrostatic Field Theory

by Pengfei Li 1,2,3, Dongbo Lv 1,3,4, Chengwei Li 2,*, Xianjie Yue 2 and Hongliang Cao 4
1
Meteorological Disaster Prevention Technology Center of Heilongjiang Province, Harbin 150030, China
2
School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
3
China Meteorological Administration High Latitudes Laboratory for Lightning Research, Harbin 150030, China
4
Lightning High Voltage Research Laboratory, Nanjing University of Information Science & Technology, Nanjing 210044, China
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1418; https://doi.org/10.3390/electronics8121418
Received: 14 October 2019 / Revised: 12 November 2019 / Accepted: 25 November 2019 / Published: 28 November 2019
(This article belongs to the Section Power Electronics)
Lightning protection for blades is one of the most important factors for the safe operation of wind turbines. In view of the differences in the designs of blade receptors, a full-scale blade receptor model was constructed on the basis of the scaling experiment of the wind turbine and electrostatic field theory. By combining the electromagnetic finite element analysis with leader discharge theory, this study analyzed and discussed the influence of the protruding height of receptors and the design of receptor types on the lightning receiving effect of the blade, and the optimum design scheme of blade receptors was proposed. According to the results of this study, the field intensity distribution on the surface of the receptor was a high-boundary and low-middle structure. The receptor easily produced an upward connection leader as the lighting junction. The electric field intensity around the receptor was substantially distorted after 4 mm protrusion, which was approximately twice the electric field intensity of a flat right-angle receptor. The convex chamfer had multiple centralized lightning stroke points compared with the convex right-angle design, thereby exhibiting better solidification and reliability at the lightning stroke area, which are conducive to protecting the blade from lightning damage. The electric field intensity of the convex fillet was similar to the chamfer, but the radius of the electric field intensity of the convex fillet was small, and the attenuation of the electric field intensity with the radius was evident. This study provides a reference for further optimization design of blade receptors. View Full-Text
Keywords: wind turbine blade; numerical simulation; receptor; electric field distortion; optimal design wind turbine blade; numerical simulation; receptor; electric field distortion; optimal design
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MDPI and ACS Style

Li, P.; Lv, D.; Li, C.; Yue, X.; Cao, H. Optimized Design of Wind Turbine Blade Receptors Based on Electrostatic Field Theory. Electronics 2019, 8, 1418.

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