摘要
基于风力机叶片雷击损坏机理,利用EMTP软件搭建完整的叶片、塔筒模型,分析叶片内置引下线、内部敷设电气线缆和采用碳纤维层压板情况下雷击暂态电位和内部电场强度。仿真结果表明:叶片遭受雷击后,引下线承受电位降可达MV强度达几千kV/m,极易发生侧向闪络产生内部电弧;引下线和碳纤维层压板在叶片尖端和根部相连方式下电位差和电场强度远小于仅在叶片根部相连方式,电场强度减小至几kV/m。当叶片内部敷设电缆线时,需尽可能拉大引下线和电缆线间距离;采用碳纤维层压板时可在叶片尖端和根部将其与引下线相连。
Taking lightning damage mechanism of blades into consideration,a complete model of the wind turbine blade,tower and grounding device are established in EMTP. Blades equipped with lightning down conductor,internal electrical wire and carbon fiber laminate are discussed. The results showed that the voltage drop across the down conductor may reach up to order of MV;the voltage difference between the lightning down conductor and the internal electrical wire decreases along the blade while electric field between the lightning down conductor and the internal electrical wire is several thousand kV/m which is easy to cause internal arcing;the voltage difference and electric field between the lightning down conductor and the carbon fiber laminate when connected at tip and root of the blade is far less than connected only at tip of the blade. In order to prevent side flashover,it is necessary to increase the separation distances between the lightning down conductor and the internal electrical wire and connect the lightning down conductor and the carbon fiber laminate at tip and root of the blade.
作者
杨仲江
刘健
肖扬
卢慧慧
Yang Zhongjiang;Liu Jian;Xiao Yang;Lu Huihui(Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of lnformation Science&Technology,Nanjing 21004,China;School of Atmospheric Physics,Nanjing University of lnformation Science and Technology,Nanjing 210044,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第1期199-205,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(41175003)
江苏高校优势学科建设工程(PAPD)
