Comparative Analysis of Conventional and Neutral Point Clamped Converter Topology for UPQC

Unified Power Quality Conditioner (UPQC) is a very powerful compensating device widely used in the Interconnected Distribution System (IDS). It is capable of dealing with almost all type of Power Quality Problems (PQP). It is the combination of Series-Shunt Compensation (SSC). It employs two converter topology namely series connected and shunt connected with the utility system. Conventional converters are designed by employing 2-Level Voltage Source Inverter (2LVSI). The 2LVSI suffers from high loss under high voltage conditions, hence this paper proposed a Multi-level Inverter (MLI) based Neutral Point Clamped (NPC) converter topology for designing UPQC. The comparative analysis of 2LVSI and NPC-MLI based UPQC is presented for simultaneous voltage regulation and mitigation of harmonic to check the topological superiority of the converter design.