Modified and Simplified ADALINE Extraction Algorithms for Shunt Active Power Filters - A Comparative Study

This paper presents modified and simplified ADALINE extraction algorithms for generating a reference signal for a single-phase Shunt Active Power Filter (SAPF). The work evaluates the performance of both extraction algorithms based on the error and ripple percentages of the extracted fundamental components of instantaneous load current during the steady-state operation and the settling time of achieving constant amplitude of the extracted signal during the dynamic-state operation. The process involves variable and higher learning rates. Furthermore, the work analyses the effects of using both extraction algorithms in the SAPF operation. It focuses on the Total Harmonic Distortion (THD) values and ripple percentage of instantaneous supply current during the steady-state and the settling time to achieve a stable current waveform during the dynamic-state operation. According to the simulation results, the modified ADALINE extraction algorithm performs better than the simplified ADALINE extraction algorithm in terms of the error and ripple percentages. Furthermore, applying the modified ADALINE extraction algorithm has enhanced the SAPF performance in mitigating harmonic supply currents and achieving low THD values.