Analysis of a three-phase to seven-phase transformer under unbalanced input

Tabrez, Md.; Sadhu, Pradip Kumar; Iqbal, Atif; Bakhsh, Farhad Ilahi

doi:10.1007/s00542-020-04791-z

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…The conceptual design of the presented three-phase to sevenphase transformer is referred from [16,29]. Unlike Design 1, the primary side of the three-phase to seven-phase transformer is connected in a star or delta while different secondary windings are connected specially and then joined together to make a star point as shown in Figure 2.…”

Section: Designmentioning

confidence: 99%

“…The study of an unbalanced three-phase system and the effect of an unbalanced supply on the three-phase induction machines is expansively reported in the literature [10][11][12][13][14][15]. However, the study of an unbalanced multiphase system and its impact on the performance of multiphase machines is rarely found in the literature [16,17]. The performance of a five-phase induction motor under an unbalanced supply is investigated in [18].…”

Section: Introductionmentioning

confidence: 99%

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Simulation and experimental study of power flow in a seven‐phase transformer under fault conditions

Husain¹,

Tabrez²,

Bakhsh

et al. 2022

IET Generation Trans & Dist

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Fault analysis is necessary to design a protection system and circuit breakers for a power system network. The multiphase system is a new technology so very little work is found for the fault analysis of a multiphase system contrary, unlike a three‐phase system. The faults in a seven‐phase system may be either symmetrical or non‐symmetrical. A non‐symmetrical fault requires studying the sequence components of a seven‐phase system using Fortescue transformation. In the paper, non‐symmetrical fault analysis of the seven‐phase system has been analysed. For this, a new definition of sequence components of an unbalanced seven‐phase system has been proposed in this paper. Then the proposed sequence components are applied to different faults studies at the input and output sides of a seven‐phase transformer. Further, the effect of the construction of a seven‐phase transformer, that is, core type and shell type on its output is studied. Moreover, the effect of open‐phase input is analysed using simulation and hardware results. From the analysis, it is found that in certain configurations of a seven‐phase transformer, the seven‐phase output is produced even though open‐phase fault is present at the input while in other configurations, seven‐phase is not produced in the case of open‐phase fault.

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Section: Designmentioning

confidence: 99%