Multi-Pulse Rectifier Based on an Optimal Pulse Doubling Technique

• Published in: Energies (Basel) Vol. 15; no. 15; p. 5567
• Main Authors: Abdollahi, Rohollah, Gharehpetian, Gevork B., Mohammadi, Fazel, Prakash P, Saravana
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-08-2022
• Subjects: AC–DC converter; Autotransformers; Harmonic distortion; Industrial applications; multi-pulse rectifier; Power factor; pulse doubling technique (PDT); Retrofitting; Simulation; Simulation analysis; tapped interphase reactor (TIPR); total harmonic distortion (THD)
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en15155567

This paper presents pulse multiplication technology based on an optimal Pulse Doubling Technique (PDT) to upgrade a 28-Pulse Rectifier (28-PR) to a 56-PR. The optimal PDT comprises a Tapped Interphase Reactor (TIPR) with a low kVA-rating and two diodes. The number of pulses can be increased from 28 to 56 using the PDT so that the input current harmonics are reasonably mitigated. Additionally, the 14-phase Polygon-Connected Autotransformer (PCA) is designed in such a way that it can be used for retrofit applications. A detailed simulation analysis in the MATLAB/Simulink environment is carried out, and the results show that the improved quality indices of the final AC input and DC output power are equivalent to the IEEE 519-2014 standard and meet sensitive industrial application requirements with an input current Total Harmonic Distortion (THD) lower than 3%. Moreover, the power factor also maintained unity for a wide operating range. The optimal PDT scheme is affordable and easy to implement as only a small-capacity PDT (only 1% of the output power) is needed to double the pulse number. An experimental prototype is developed to verify the simulation results.