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ppt on a combination of shunt hybrid power filter and thyristor controlled reactor for power quality

This paper proposes a combined system of a thyristor-controlled reactor (TCR) and a shunt hybrid power filter (SHPF) for harmonic and reactive power compensation. The SHPF is the combination of a small-rating active power filter (APF) and a fifth-harmonic-tuned LC passive filter. The tuned passive filter and the TCR form a shunt passive filter (SPF) to compensate reactive power. The small-rating APF is used to improve the filtering characteristics of SPF and to suppress the possibility of resonance between the SPF and line inductances. A proportional-integral controller was used, and a triggering alpha was extracted using a lookup table to control the TCR. A nonlinear control of APF was developed for current tracking and voltage regulation. The latter is based on a decoupled control strategy, which considers that the controlled system may be divided into an inner fast loop and an outer slow one. Thus, an exact linearization control was applied to the inner loop, and a nonlinear feedback control law was used for the outer voltage loop. Integral compensators were added in both current and voltage loops in order to eliminate the steady-state errors due to system parameter uncertainty. The simulation and experimental results are found to be quite satisfactory to mitigate harmonic distortions and reactive power compensation.

A combined system of a thyristor controlled reactor (TCR) and a shunt hybrid Power filter (SHPF) is used for reactive power compensation and harmonic reduction. The SHPF is the combination of a small rating active power filter and a fifth harmonic tuned LC passive filter. Five level neutral points clamped (NPC) 180° mode converter is used in shunt active power filter to improve power quality without using higher passive elements which has a reduced switching stress and switching losses that improve the lifetime of converters. The TCR along with tuned passive filter is used for reactive power compensation, to improve the power factor. A nonlinear control is developed in proportional-integral controller for current tracking and voltage regulation, which is based on decoupled control strategy that considers the controlled system, may be divided into an inner fast current loop and an outer slow voltage loop. Thus, an exact linearization control was applied to the inner loop, and a nonlinear feedback control law is used for outer voltage loop. A simulation study of the implementation topology has been carried out using MATLAB.