PERFORMANCE INVESTIGATION OF SHUNT ACTIVE POWER FILTER FOR THREE-PHASE FOUR WIRE SYSTEM

Abstract

Now a days to achieve better performance, highly efficient operation and for compactness customers are seeing for the power electronic technologies. The use of the power electronic devices leads to reactive power problems; injection of harmonics in the 3P4W supply system causes the power quality problems. To maintain the quality of the power at the customer end is becoming difficult. Poor power quality leads to misoperation of the power system devices like relays, operation failure of the electronic devices and so many other problems. Thus it is required to come up with some techniques by which these problems can overcome. In this dissertation work to overcome power quality related problems in 3P4W system, shunt active filter performance evaluation with the use of Matlab Simulink for three different topologies was carried out. To control the shunt filter two control schemes were presented (reactive power theory and conventional control). The control circuits are implemented with the help of dSPACE (DS1104) DSP. The simulation of four legged topology, capacitor mid-point topology and three H-bridge topology has been done in Matlab/Simulink. Hardware results are verified with simulation results.