A wind farm with multiple wind turbines may be
represented with its output power at the PCC. Ten minute
average data (Pmc and Qmc ) and 60 s average data (P60 and
Q60) can be calculated by simple summation of the output
from each wind turbine, whereas 0.2 s average data (P0.2 and
Q0.2) may be calculated according to equations (3) and (4)
below.
Σ Σ( )
= =
Σ = + −
wt Nwt
i
i n i
N
i
n i P P P P
1
2
0.2, ,
1
0.2 ,
(3)
Σ Σ( )
= =
Σ = + −
wt Nwt
i
i n i
N
i
n i Q Q Q Q
1
2
0.2, ,
1
0.2 ,
(4)
where Pn,i , Qn,i are the rated real and reactive power of the
individual wind turbine; Nwt is the number of wind turbines in
the group.