Comparative Study of Two Control Technique for Shunt Active Power Filter using PID Controller

Control technique for extracting three-phase reference currents for shunt active power filters are compared, evaluating their performance with PID Controllers. During past several year's power electronics-based load connected for low and medium voltage in power distribution system are increase rapidly and these load draw non-sinusoidal current from mains and reduce power quality by causing harmonic distortion. Harmonics removal is important issue and effective way to compensate harmonics is Shunt Active Power Filter (SAPF). Shunt active power filtering is effective and its performance depends upon control strategies used for reference current generation. There are several number of control techniques for reference current generation have been developed. This paper present comparative study of two control technique first one is active reactive power theory and second one is active reactive current control theory. Both techniques are analyzed mathematically and simulated in MATLAB platform. It is evaluated considering total harmonic distortion (THD). Active reactive current control theory gives better simulation results than active reactive power theory.