Experimental experiences of the summation of flicker contribution from individual wind turbines in a wind park
Paper in proceedings, 2007
This paper presents flicker emission measurements from a wind park
consisting of seven variable speed wind turbines. The grid flicker
level is compared with the calculated contribution from the wind
turbines, and in addition, the individual flicker contribution is
compared with the summed contribution of all the seven turbines.
It is found that the total flicker content produced by the wind park
is higher than the value found by using the summation equation given
in IEC-61400-21. For the investigated wind park the underestimation
is 20 \% which is lower compared to a previously reported case when
using a smaller wind park equipped with fixed-speed wind turbines.
Moreover it is found that on this low flicker level grid, the
prediction of grid flicker impact by the wind energy installations
match the measured grid flicker content very well.