Abstract
This research study mainly focuses on using an efficient control strategy for extracting reference currents of shunt active filters under non linear load conditions. In recent decades, the utilization of highly automatic electric equipments has resulted in enormous economic loss. Thus, the power suppliers as well as the power consumers are very much concerned about the power quality issues and compensation approaches. In order to deal with this issue, Active Power Filter (APF) has been considered as an attractive solution due to its significant harmonic compensation. But, the performance of APF is not consistent and is varies based on the output of the controller techniques. An efficient (i<sub>d</sub>-i<sub>q</sub>) control strategy is used in this approach for attaining utmost profit from grid-interfacing inverters installed in transmission systems. The voltages are controlled through the PI controller which is further tuned by an optimization approach. Bacterial Forge Optimization (BFO) is used in this approach for tuning the PI controller for the optimal value. The inverter used in this approach can be considered as a Shunt Active Power Filter (SAPF) to compensate non linear load current harmonics. In order to improve the overall performance of the system, Space Vector Pulse Width Modulation (SVPWM) is used in this proposed approach which regulates power frequency and produces good circularity through DC-AC part. SVPWM also eliminates the 3rd order harmonics and minimizes the 5th order harmonics effectively. The integration of (i<sub>d</sub>-i<sub>q</sub>) control strategy and SVPWM has been proposed in this research study. Simulation results are carried out in MATLAB/Simulink and the performance of the proposed approach is compared with other control strategies. This research studies shows unique approach for attaining maximum benefits from RES with suppression of current harmonics.
Highlights
The increasing demand of energy due to the modern industrial society and population growth is the fundamental motivating factor for the active research in alternative energy solutions, in order to improve energy efficiency and power quality issues (Belaidia et al, 2011).Utilities in India suffer from rigorous power shortage and associated power quality issues
The proposed Bacterial Forge Optimization (BFO) based Shunt Active Power Filter (SAPF) approach has been current id and the negative reference current iq is simulated in MATLAB 2010
This study proposes an optimal BFO based self tuning the Proportional Integral (PI) controller to eliminate line current harmonics and compensate reactive power
Summary
The increasing demand of energy due to the modern industrial society and population growth is the fundamental motivating factor for the active research in alternative energy solutions, in order to improve energy efficiency and power quality issues (Belaidia et al, 2011). An improved wind energy conversion system by means of permanent magnet generators and power electronic converters are introduced by Shyam et al (2012) In this system, the inverter is used to control and it can operate as a conventional inverter as an active power filter. Smaller inductance of the LCL filter results in smaller harmonic voltage drop across the passive output filter, which reduces the possibility of over modulation, especially for scenarios where high modulation index is needed These benefits along with overall system stability can be assured only via proper consideration of critical design and control issues, like choosing LCL parameters, communications between and load reactive power demand (Shyam et al, 2012). Shunt active power filter: The active and the passive components are combined together to form active filters and these filters needs an external power source
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