The Modeling, Simulation and Design of Prototype Three Phase 6, 12, 18 and 24 pulse converters with Phase Shifting Transformer for Power Quality Improvement

Abstract

This research paper presents the, 6,12,18 and 24 pulse converters with Phase Shifting Transformer Configuration for power quality improvement, as it highly reduces the Total Harmonics Distortions current in main ac supply. Interconnection of conventional transformers are used to make Four 3-φ systems to obtain different phase shifts is presented and obtained performance is compared between of a 6,12,18 and 24 -pulse Transformer Rectifier Configuration. Such multi pulse topologies consist on the various 6-pulse converter units connected either in parallel or series on the DC side. Each units phase shifted by the auto transformer or individual designed isolated transformers to compensate the harmonics content in the order of (nP±1), n = 1,2, 3, and P = Pulses. This proposed work is mainly based on the two objectives (1) to simulate the various multi pulse transformer (up to 24 pulse) with R-Load, using the matlab software. (2) Prototype hardware model. In both cases analysis the Total Harmonic Distortions current in main ac supply by FFT Analysis and FLUKE 43 Power Quality Analyzer. Finally, Simulation based results have been validate with Gutor and IEEE 519-1992 Standard. Experimental results compared with IEEE Standard and additionally improves the THDs voltage, Crest Factor and K Factors.