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Integration of fixed-speed wind Chapter | 14 385
maximization of PPL and DPF, and minimization of the THDV Mean and
VUF.The VUF and harmonic distortion limits, stated in the standards and
the desired DPF and rms bus voltage ranges, were regarded as constraints of
the optimal design problem. The PSO algorithm was employed to find the
optimal parameters of the proposed compensator.
The simulation results were presented for the system without and with
three different compensators as the proposed optimal compensator
(SC 1 STF), optimal SC, and optimal STF designs. It should be noted that
optimal SC design was attained by considering the proposed compensator’s
problem formulation except the objectives and constraints related to voltage
harmonic distortion. In addition, optimal STF design was provided regarding
the proposed compensator’s problem formulation except the objectives and
constraints related to voltage unbalance.
It can clearly be mentioned from the analysis that the proposed one
achieved the highest PPL, and it provided better collective mitigation of
THDV Mean , DPF, and VUF when compared to the other two compensators.
Finally, performance of the proposed optimal compensator was tested
under varying utility voltage and load-side conditions. The results showed
that the proposed compensator provides THDV Mean , PPL, and DPF enhance-
ment under low loading levels and ideal sinusoidal utility voltages even if it
was optimally designed for the rated loading level and considerably distorted
and unbalanced utility voltage conditions. In addition to that, it avoided VUF
increment for low loading level or ideal utility voltage conditions.
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