M.Vijayalakshmi
1, R.Ganesan 2, S.Srinivasan 3
1PG student- Department of EEE – Sethu Institute of
Technology, Kariapatti, Tamilnadu, India.
2Professor - Department of EEE – Sethu Institute of
Technology, Kariapatti, Tamilnadu, India.
3 Associate Professor - Department of EEE – Sethu
Institute of Technology, Kariapatti, Tamilnadu, India.
This paper focuses on the combined
system of a Thyristor Controlled Reactor (TCR) and a Shunt Hybrid Power Filter
(SHPF) for the 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 Fuzzy
logic controller was used 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 results are found to
be quite satisfactory to mitigate harmonic distortions and reactive power
compensation.
