Power Quality Improvement in Utility Interactive Based AC-DC Converter Using Harmonic Current Injection Technique

• Published in: IEEE transactions on industry applications Vol. 54; no. 5; pp. 5355 - 5366
• Main Authors: Prakash, P. Saravana, Kalpana, R., Singh, Bhim, Bhuvaneswari, G.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-09-2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: AC-DC converters; Current injection; Current modulation circuit; Distributed Bragg reflectors; Electric potential; front-end rectifier; Harmonic analysis; Inductance; Modulation; power factor correction (PFC); Power harmonic filters; Power quality; Rectifiers; third harmonic current injection; three-level boost converter; total harmonic distortion (THD); Transformers; zig-zag transformer
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2018.2855142

This paper highlights the power quality issues and explains the remedial measures taken by means of hybrid front-end third harmonic current injection rectifiers. Here, a zig-zag transformer is used as the current injection device so that the advantages pertaining to the zig-zag transformer are effectively utilized. The third harmonic current injection device along with three-level boost converter at the output stage will increase the dc-link voltage. With less boost inductance, generally half of the conventional boost converter inductance is sufficient to implement the proposed converter structure resulting in reduced ripple current and also the device rating is reduced by half of the output voltage. Moreover, the power quality is well improved using third harmonic current modulated front-end structure, which is well appropriate for medium/higher power applications. The experimental prototype of hybrid front-end converter is developed in the laboratory to validate the MATLAB simulation results.