Harmonic Mitigation in Shunt Active Power Filter Regulation Approaches with Synchronous Reference Frame: An Extensive Analysis

Abstract

The Shunt Active Power Filter (SAPF) is discussed in this work as a means of removing line-side current harmonics. The Voltage Source Inverter (VSI) topology serves as the foundation for the Active Power Filter. It resolves the power system's harmonic current issue. Additionally, it balances the load on three phases and compensates for reactive power (if load is unbalanced). After measuring load current, it switches to the dq0 coordinate system. The d axis's initial position is selected so that it provides the active portion of the current. To eliminate harmonics, inject the oscillating portion of the load current's d and q axis components. Reactive power should be compensated by injecting the non-oscillating portion of the q axis component. To balance the loads, zero sequence component should be introduced. Consequently, the coordinate system dq0 determines the required quantity of current to be delivered. It is changed to the coordinate system of ABC. This current is the compensating reference current. Using the hysteresis band current control (HBCC) technique, a three-phase inverter injects the compensatory current into the network. The responsive and  harmonic elements that make up the load are supplied by this shunt active power filter in this way. Using MATLAB/Simulink, a shunt active power filter simulation is run. The outcome demonstrates that the system's current harmonics have been eliminated. Better performance can be achieved by modifying the windup of the PI controller's integral term in an efficient manner, as this paper suggests.