Power Quality Improvement by using Fuzzy Logic Controller for SHPF and TCR

Now a days in any industrial and domestic applications large power electronic equipments are increasingly used. When discussing about power electronics equipment’s having the lot of parameters are need to consider like harmonic contamination, disturbances of non-linear loads, and fluctuations of output voltages and currents etc. so in this concept the combination of shunt and TCR active filters are used as a compensate the voltage and current mitigate any form of voltage and current fluctuations and power factor correction in a power distribution network. When used as a fuzzy logic controller was adapted control the TCR. For current trailing and voltage regulation a nonlinear control of APF was developed. The latter is based mostly on a decoupled control strategy that considers that the controlled system could be divided into an inner quick loop and an outer slow one. Thus, an actual linearization management was applied to the inner loop, and a nonlinear feedback control law was used for the outer voltage loop. Integral compensators were added in each current and voltage loops in order to eliminate the steady-state errors due to system parameter uncertainty. MATLAB SIMULINK environment has been used to validate the proposed techniques and comparative analysis have been carried out.