Optimization of DC‐link voltage regulator using Bat algorithm for proportional resonant controller‐based current control of shunt active power filter in distribution network

Abstract

In this article, proportional resonant (PR) controller‐based pulse width modulation (PWM) current control for three‐phase, three‐leg SAPF with the optimized dc‐link controller is implemented to compensate for current harmonics produced by nonlinear loads. The optimization of the dc‐link voltage regulator is implemented using Bat Algorithm (BA). The stability of the current controller with the proposed system with a mathematical model is evaluated in the time and frequency domain. Instantaneous real and reactive power theory (pq‐theory) is applied for reference currents generation. Simulation of the proposed controller is performed in MATLAB/Simulink environment. The controller is implemented in FPGA platform and the results of simulation are verified with the experimental prototype. The optimized dc‐link results in the improved performance of SAPF. The new dimension of the PR controller in a grid‐connected system for harmonic regulation is implemented and validated with experimental results. The objective of reduced current harmonics with a minimum per phase fundamental current and unity power factor at the point of common coupling is achieved.

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