Study of the Harmonic Analysis and Energy Transmission Mechanism of the Frequency Conversion Transformer

Zhonghuan Su, Longfu Luo, Jun Liu, Zhongxiang Li, Hu Luo and Peng Zhao
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Zhonghuan Su: College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
Longfu Luo: College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
Jun Liu: College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
Zhongxiang Li: College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
Hu Luo: College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
Peng Zhao: Key Laboratory of Special Motors and High Voltage Electrical Appliances, Ministry of Education Shenyang, University of Technology, Shenyang 110178, China

Energies, 2022, vol. 15, issue 2, 1-13

Abstract: Since the transmission distance of submarine cable transmission is inversely proportional to the input frequency, to solve the problem of large losses in the transmission process of offshore wind power, this paper proposes a three-frequency transformer which enables the output of 50 Hz at the input of 50/3 Hz excitation. In this paper, the magnetic flux of a three-dimensional wound core transformer is analytically modeled, the existing condition of magnetic flux harmonics of a three-dimensional wound core transformer is analyzed, the distribution of harmonic content in magnetic flux is obtained, and the principle of realizing frequency conversion is expounded. Secondly, the finite element analysis of the frequency converter is carried out. Finally, a prototype of a frequency transformer is made and tested to verify the correctness of the proposed scheme.

Keywords: three-dimensional wound core transformer; frequency conversion; magnetic flux; zero phase sequence harmonics wave (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: 2022
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