Performance Assessment of Lyapunov-Function based 3-Phase SAPF in Compensating Harmonics of Industrial Motor Drive

SAPF, or Shunt Active Power Filter, is a bespoke power device that adjusts harmonics, improve power factor, and imbalance generated by various forms of non-linear loads in the distribution system. The control mechanism, i.e. the accurate detection of the current constituents, governs SAPF's efficacy as a harmonics compensator. In present work, a Lyapunov function established control method has been modeled for a three-phase SAPF for compensating the harmonic currents generated by industrial motor drives in power distribution networks. In this method, a control law has been found that renders the Lyapunov function continually remains -ive in wholly state values. Further, for keeping a constant reference dc-link capacitor voltage, PI-controller has been used. In MATLAB/Simulink, the technique was evaluated on a reformed test IEEE 13-bus distribution network feeding a three-phase chopper supplied DC motor drive on a solo bus. Comparison of outcomes attained through Matlab simulation also validates that the total harmonic distortion (THD) of source current and dynamic along with steady-state performance is enhanced in comparison to the former traditional approaches. Additionally, the rating of SAPF in the suggested technique has also been found to be considerably reduced in comparison to the other conventional methods.