Compared with other lightning target on ground, the most notable feature of wind turbine is that the blade will normally be in a state of rotation during lightning strike. In order to study the specialty and mechanism of the influence of blade rotation on triggered lightning ability, the paper conducted some lightning discharge comparison tests under different status of stationary and rotating blade on a typical 1:30 reduced-size 2 MW wind turbine. Designed special arching surface electrode to ensure the same distance between the tip of rotation blades and the arching surface electrode all the times. Applying a negative polarity 250/2500μs standard operating wave on the high voltage electrode. The up-and-down method was adopted for 50% discharge voltage and observed the discharge process. The experimental results showed that under the condition of 1m, breakdown voltage will get higher with the blade rotation speed increase, the wind turbine's blade rotation reduced triggering lightning ability. Analysis showed that the rotation of the blades changes the charge distribution of the blade tip region, which affects the discharge development process. The result gives a reference for lightning protection of wind turbines.
[1]
M. M. Drabkin,et al.
Corona discharge at the tip of a tall object in the electric field of a thundercloud
,
2002
.
[2]
N. Honjo,et al.
Causes of wind turbine blade damages due to lightning and future research target to get better protection measures
,
2014,
2014 International Conference on Lightning Protection (ICLP).
[3]
N. Takagi,et al.
Observed characteristics of upward leaders that are initiated from a windmill and its lightning protection tower
,
2008
.
[4]
J. Montanyà,et al.
Lightning discharges produced by wind turbines
,
2014
.
[5]
X. R. Wang,et al.
Light Emitting Diodes of Inverse Spin Valves
,
2008,
0801.2246.
[6]
Mohamed A. Izzularab,et al.
Experimental evaluation of air-termination systems for wind turbine blades
,
2014
.
[7]
Gerhard Diendorfer,et al.
Lightning Protection of Wind Turbine blades
,
2013
.