Due to the rise of non-linear trendy power electronics, currents and voltages created by non-linear loads have cause the deterioration and distortion of the output wave kinds of the supply currents and voltages. These distortions have resulted inside the power quality problems. The power quality enhancement victimization shunt active power filter is analyzed exploitation FPGA and DSP controllers. The proposed topic contains shunt active power filter with these controllers for Proton Exchange Membrane Fuel Cell (PEMFC) Fed Adjustable Speed Drives. These controllers are used for generating the switching signal for a shunt active power filter to mitigate Total Harmonic Distortion (THD) before the adjustable speed drives. This paper presents the simulation and modeling of three phase shunt active power filter with intelligent controllers to mitigate Total Harmonic Distortion drawn by the Adjustable Speed Drives. The proposed theme is performed by using MATLAB / Simulink environment. The simulation results obtained by the proposed theme show that FPGA controller is pre-eminent when compared with DSP controller. The proposed control algorithmic rule found to be satisfied and among the suggested obligatory IEEE 519-1992 harmonic normal limit.