电瓷避雷器Issue(6)：1-10,10.DOI:10.16188/j.isa.1003-8337.2023.06.001
不同旋转角度下风机叶尖电晕放电空间电荷分布仿真分析
Simulation and Analysis on Distribution of Space Charge of Wind Turbine Blade Tip Corona Discharge at Different Rotation Angles
摘要
Abstract
Aiming at the problem of unclear distribution characteristics of space charge near blade tip of wind turbine,the author adopted simulation modeling method to simulate corona discharge of blade tip at different angles.The relative motion between the blade tip and the surrounding air when the wind turbine blade is rotating is equivalent to the high-speed air flow through the blade tip.Considering the attach-ment and collision between positive ions and other ions,a two-dimensional positive corona discharge space charge distribution model was established.Based on the above model,the blade tip corona dis-charge was simulated and the distribution and migration characteristics of positive space charge were ob-tained when the blades at different angles.It is found that,under the lightning electric field and high-speed air flow,the transfer velocity of space charge provided by the high-speed airflow flowing through the blade tip is much higher than that provided by electric field traction,therefore,the transfer and diffu-sion direction of space charge in the blade tip is mainly determined by the direction of the high-speed airflow at the blade tip.At the same time,the space charge no longer symmetrically distributed in space causes space potential distortion,the potential on the left side(windward side)of the blade tip air-ter-mination is higher than that on the right side at the same height,and the direction of the maximum elec-tric field near the blade tip air-termination shifts to the left,and the electric field amplitude also increa-ses compared with that in the static condition.The work carried out in this paper can provide a basis for the initiation and development calculation of upstream pilot of wind turbine blades,and provide a theoret-ical basis for the design of lightning protection system of wind turbine blades.关键词
风机发电机/电晕放电/空间电荷/有限元法Key words
wind turbine/space charge/corona discharge/finite element method(FEM)引用本文复制引用
杨仟慧,周光远,刘洛阳,邓冶强,王羽,陈小月,蓝磊,文习山,方超颖..不同旋转角度下风机叶尖电晕放电空间电荷分布仿真分析[J].电瓷避雷器,2023,(6):1-10,10.基金项目
国家电网有限公司总部科技项目"大型风电场雷击灾害预警与风险评估技术研究"(编号:5500-202221143A-1-1-ZN).Project supported by Science and Technology Program of State Grid"Research on Disaster Warning and Risk Assessment Technology for Lightning Strike in Large Wind Farms"(No.5500-202221143A-1-1-ZN). （编号:5500-202221143A-1-1-ZN）
