Abstract
This paper implements a parallel active power filter (APF) with a three-level inverter and an adaptive neuro-fuzzy inference system (ANFIS)-based controller for voltage regulation. The limitations with nonlinear industrial loads are that they have high power rating and conventional two-level parallel APF cannot be used for mitigating harmonics in such applications. Hence, here a multilevel inverter-based parallel APF that meets the requirement of high-voltage high-power application is proposed. A three-level hysteresis current regulator generates gating pulses for the switches in parallel APF. The modified version of instantaneous real and reactive power (p–q) theory is applied for obtaining reference current with ease. Simulations are done to verify the performance of ANFIS controller in MATLAB with dynamic load changes and distorted supply condition. The outcome of simulation with ANFIS controller is compared with that of fuzzy logic controller (FLC), and its performance is found to be relatively better than FLC with respect to reduction in total harmonic distortion and regulation of inverter DC side capacitor voltage.
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