Three-Phase Active Power Filter with Hysteresis Current Control
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A three-phase active power filter simulated in MATLAB Simulink based on the hysteresis current control method. This filter is primarily designed for reactive power compensation and harmonic suppression in power systems. The hysteresis current control method operates by continuously comparing the difference between the filter's output current and the reference current, then adjusting the PWM waveforms accordingly to suppress harmonic currents in the power system. This control technique effectively reduces harmonic pollution and enhances power quality. The implementation typically involves current sensors for real-time measurement, a reference current generation algorithm using instantaneous power theory, and a hysteresis comparator that maintains the current error within a predefined band by switching the inverter states. Key Simulink blocks used include current measurement blocks, PWM generators, and three-phase inverter models with appropriate gate drive logic.
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