Hysteresis Band Current Control For Harmonic Compensation of Unbalanced & Nonlinear load
Keywords:
Control strategy, harmonic compensation, hysteresis band controller, shunt active power filter, Matlab.Abstract
In this paper, instantaneous reactive power theory (IRP), also known as p–q theory based
control algorithm is proposed for 4-leg shunt active power filter (APF) to suppress harmonic line
currents and neutral current and balance the load currents under unbalanced non-linear load and nonideal mains voltage conditions. The p-q theory is composed from 4-leg voltage source inverter (VSI)
with a hysteresis–band PWM current controller. Conventional p-q theory for different loading
condition such as nonlinear load and unbalanced load along with Hysteresis band current control
technique is simulated and harmonic disturbances has been analysed. All simulations are carried out
using Matlab/Simpowersystem.