Abstract
The damage of wind turbine blades suffered lightning strikes has been a key factor of the safe and reliable operation of wind farms. The electric geometrical model of wind turbine blades (EGMTB) was presented based on the traditional electric geometrical method and the physical process of lightning leader. The concept of dynamic striking distance was introduced and clarified the physical meaning of striking distance. And the calculation method of blade lightning protection system (LPS) efficiency was deduced. Finally, the effectiveness of EGMTB was validated by the long gap breakdown experiment of blades. The EGMTB was used to analyze the influence factors of blade LPS efficiency. It is indicated that the efficiency of blade LPS reduces with the decrease of lightning current and the angle between the blade and horizontal, and the efficiency of blade LPS can be improved by increasing the side lightning receptors. The EGMTB is intended to provide a theory for lightning protection design and evaluation of wind turbine blades.
| Translated title of the contribution | Dynamic striking distance and electrical geometry model of wind turbine blades based on lightning physics |
|---|---|
| Original language | Chinese |
| Pages (from-to) | 6427-6436 |
| Number of pages | 10 |
| Journal | Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 37 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 5 Dec 2017 |
Keywords
- efficiency of lightning protection system (LPS)
- electric geometrical model
- leader progression model
- lightning protection
- striking distance
- wind turbine blade