Comparative Analysis of 18-Pulse Autotransformer Rectifier Unit Topologies with Intrinsic Harmonic Current Cancellation

Shahbaz Khan, Xiaobin Zhang, Muhammad Saad, Husan Ali, Bakht Muhammad Khan and Haider Zaman
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Shahbaz Khan: School of Automation, Northwestern Polytechnical University, Xi’an 710129, China
Xiaobin Zhang: School of Automation, Northwestern Polytechnical University, Xi’an 710129, China
Muhammad Saad: School of Traffic and Control Signal, Chang’an University, Xi’an 710072, China
Husan Ali: School of Automation, Northwestern Polytechnical University, Xi’an 710129, China
Bakht Muhammad Khan: School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, China
Haider Zaman: School of Automation, Northwestern Polytechnical University, Xi’an 710129, China

Energies, 2018, vol. 11, issue 6, 1-18

Abstract: With the evolution of the More Electric Aircraft (MEA) concept, high pulse converters have gained the attention of researchers due to their higher power quality. Among the high pulse converters, 18-pulse autotransformer rectifier unit (ATRU) offers better power quality level with small size, weight and medium complexity. The conventional topologies of autotransformers that require the use of extra elements such as Inter Phase Transformers (IPT) or Zero Sequence Blocking Transformers (ZSBT), adding to the complexity, weight and size of the overall system, are not considered in the analysis. For 18-pulse rectification, only those topologies of autotransformers which have the intrinsic current harmonic cancellation capabilities are presented here for comparison. These topologies offer current harmonic levels within limits specified by IEEE 519 with reduced weight and size as compared to the conventional multi-pulse converters. A comparison of different differential delta/fork configured 18-pulse autotransformer rectifier units is presented so as to come up with the best among available topologies with respect to weight, size and power quality. Experimental prototypes of each topology were designed and their results are displayed along with the simulation results for comparison.

Keywords: inter phase transformers (IPT); power quality; zero sequence blocking transformers; 18-pulse converters; autotransformers rectifier unit (ATRU) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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