Page 424 - Decision Making Applications in Modern Power Systems

384 Decision Making Applications in Modern Power Systems

TABLE 14.3 The power quality indices and PPL measured in the three
cases of the system before compensation.
Parameters Case 1 Case 2 Case 3
THDV a (%) 3.91 3.77 4.24
THDV b (%) 4.31 4.90 4.65
THDV c (%) 5.80 6.26 7.52
THDV Mean (%) 4.67 4.97 5.47
VUF (%) 2.89 4.50 2.26
1
V (p.u.) 1.01 1.03 1.04
DPF (%) 86.91 96.26 85.91
PPL (%) 75.40 61.90 85.00
DPF, Displacement power factor; PPL, permissible penetration level; THDV, total voltage
harmonic distortion; VUF, voltage unbalance factor.

TABLE 14.4 The power quality indices and PPL measured in the three
cases of the system after compensation using the proposed compensator.
Parameters Case 1 Case 2 Case 3
THDV a (%) 2.30 2.82 1.66
THDV b (%) 1.00 1.01 0.60
THDV c (%) 1.59 2.19 1.28
THDV Mean (%) 1.63 2.00 1.18
VUF (%) 2.08 0.65 2.34
1
V (p.u.) 1.03 1.05 1.06
DPF (%) 95.93 99.99 95.81
PPL (%) 84.70 99.50 89.00
DPF, Displacement power factor; PPL, permissible penetration level; THDV, total voltage
harmonic distortion; VUF, voltage unbalance factor.

14.5 Conclusion
This paper at first presented an algorithm to find the PPL of the FSWECS
under unbalanced nonsinusoidal voltage and current conditions. Second, a
compensator design, which consists of SC and STF, was suggested for