Scientific African (Sep 2023)
Reduction and control of harmonic on three-phase squirrel cage induction motors with voltage source inverter (VSI) using ANN-grasshopper optimization shunt active filters (ANN-GOSAF)
Abstract
ABSTRACT: The research paper focuses on the reduction and control of harmonic in a 3-phaseSquirrel Cage induction motor (SCIM) which drive by a pulse width modulation (PWM) controlled three-phase converter using a newly proposed ANN-Grasshopper optimization Shunt Active filters (ANN-GOSAF) method. The converter is a nonlinear load whose operation generates harmonics, posing power quality problems to the system which results in excessive heating and motor torque pulsation. The effect of Total Harmonic Distortion (THD) on a three-phase squirrel induction motor with and without (ANN-GOSAF) was analyzed using MATLAB/Simulink software and compared with other previous methods by other researchers. The vector control method has been applied for improving the three-phase squirrel induction motor's dynamic performance. Also, 3-phase voltage source inverter (VSI) is used for indirect induction motor control speed through the pulse width modulation (PWM). The shunt power active filter (SAPF) is directly connected in parallel with the line. The grasshopper optimization algorithm is applied to perform the optimum data set while the ANN method is applied to minimize the signal error, for optimum shunt active filters PWM pulses generation. The ANN controller is applied for shunt active power filter to regulate voltage DC-link response. Second-order filter and compensator functions are performed by shunt-connected current control-VSI linked through an inductor with a DC tank capacitor and reduction of torque harmonics was performed using Grasshopper Optimizer.The SAPFs were configured and inserted into the model and then tuned to targeted frequencies at such harmonic orders, to produce signals which are out of phase with the harmonics present in the supply signal. The result shows the reduction of current harmonics from 32.28% to 0.75% while the voltage harmonics were correspondingly reduced from 79.50% to 1.87%. This resulted in purer waveforms of both current and voltage of the three-phase induction motor thereby improving motor performance, energy-use efficiency and reduced operating cost.
