Abstract:
Excessive use of non-linear devices in industries results in current harmonics that
degrade the power quality and has an unfavorable impact on the entire performance of
power system. In this research, a Hybrid Shunt Active Power Filter (HSAPF) is
implemented for compensation of reactive power and harmonic current component for
balanced load by improving the power factor, total harmonic distortion (THD), and
performance of the system. For extracting three-phase reference current for HSAPF, a
novel control technique for harmonics mitigation based on Particle Swarm
Optimization (PSO) and Fuzzy logic Controller (FLC) is proposed in this research.
SIMULINK is used to implement Pq0 and Id-Iq control approaches for harmonics
mitigation, with a PI controller for voltage regulation and a hysteresis controller for the
reference current generation. Following a comparative analysis of both techniques i-e
Pq0 and Id-Iq control techniques, implement the Soft computing technique (PSO) on PI
controller technique on any of these techniques that perform better for harmonics
mitigation. As the performance of the PI controller is dependent on its gains, the best
gains produce better results and improve system response. The given results show that
PSO technique is an efficient technique that helped to give better performance as
compared to the conventional PI controller by improving steady-state response by
giving the best gains to PI controller. Because of the system's robustness and nonlinearity, a single PI controller does not provide better performance So, by using gains
obtained from PSO adaptively tuning of PI controller has been carried out by using FLC
that can help to improve the dynamic performance of HSAPF. Therefore, from the
comparative analysis, it can be inferred that PSO based Adaptive Fuzzy PI system has
more efficient results with a minimum THD, improved stability time, and a power
factor nearer to unity as compared to other techniques.
