Harmonics Cancellation in Three-Phase Four-Wire Systems by Using a Filtering Topology

Abstract

This paper presents harmonics mitigation in distribution system .in this the single phase inductance and capacitance are used to develop the four-branch star filter topology ,this filter topology does not required any type of transformer and electromagnetic device .Via this hybrid filter two resonance frequencies is obtain one for positive or negative sequence component and other for zero sequence component. This filtering topology can be used in hybrid or passive mode ,in passive mode only capacitance and inductance is used to mitigate the harmonic in distribution system or in hybrid mode the capacitance and inductance is used with voltage source inverter .The analysis and simulation designed provide better solution to mitigate the harmonic in Three phase four wire system i.e.in distribution system . This hybrid filter topology provides the better power quality and significant reactive power control.