Performance Investigation of Six Pulse Rectifier with Transformer Vector Groups

Abstract

Power quality is one of the main factors which govern the performance and the productivity of an industry. Diffusion of power electronics topologies in the system are the foremost causes to the devaluation of power quality. Three phase rectifiers, widely advantageous, ordinarily adopted in industrial distribution network and its contributions to the degradation of power quality are no more hidden. Harmonics mitigations in the system in a reliable and cost effective method are prime objectives. Transformers vector groups are very important in electrical network for the better service requirements. Transformer’s leakage reactance plays an excellent role as a magnetic trap to the harmonics. This paper presents the importance and applications of transformer vector groups in electrical network system and analysis the performance of three phase six pulse rectifier with various vector groups of transformer in terms of total harmonics distortion of voltage and current at PCC of a typical industrial distribution system. The conclusions show total harmonics current distortion reduction and the converse effects on voltage profile of various transformer winding configurations.