Page 420 - Decision Making Applications in Modern Power Systems

380 Decision Making Applications in Modern Power Systems

1.4
I Ga
1.2 I Gb
I Gc
1
I Ga , I Gb , I Gc (pu) 0.8

0.6

0.4
0.2

0
0 5 10 15 20 25 30 35 40 45 50 55 60
PL (%)
FIGURE 14.9 Variation of the total rms phase currents injected by the FSWECSs with their pene-
tration level into the system. FSWECSs, Fixed-speed wind energy conversion systems.

12
THDV a
THDV b
10
THDV c
THDV a , THDV b , THDV c (%) 6
8

2 4

0
0 5 10 15 20 25 30 35 40 45 50 55 60
PL (%)
FIGURE 14.10 Variation of the total harmonic distortion values of the phase voltages at the
PCC with the penetration level of the FSWECSs into the system. FSWECSs, Fixed-speed wind
energy conversion systems; PCC, point of common coupling.

out that the PPL of the FSWECSs is 54.50% where one of their phase cur-
rents reach the rated currents (I Gc 5 1 p.u.) under the considered test system
conditions. It is seen from Fig. 14.10 that THDV a , THDV b , and THDV c are
considerably affected by the PL, and they have values under the limit of