Optimum design of ampere-turn balance for power transformer

Feng, Bin; Wang, Guo Lin; Liu, Hong De; Zhang, Hai Jun

doi:10.1109/asemd.2013.6780801

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…But this highly efficient method with higher efficiency cannot sufficiently consider the spatial differences. The ampere‐turn method refers to the calculation of loading the rated current on the primary side and the secondary side, respectively. As the influence of excitation reactance is not considered, this method is widely used in traditional theoretical calculation and simulation calculation with high computational efficiency [22]. Correspondingly, a rated current is applied on the primary side, and an induced current will be generated on the secondary short‐circuit side when using the field‐circuit coupling method.…”

Section: Transformer Short Circuitmentioning

confidence: 99%

A dynamic relative displacement evaluation method for extra‐high voltage transformer withstanding short‐circuit impact

Luo

et al. 2023

IET Generation Trans & Dist

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The extra-high voltage (EHV) transformer winding disks are subjected to dynamic electromagnetic forces caused by short-circuit currents. These periodically decaying impact forces may endanger the safety of the transformer. The winding constraint conditions around the circumference are different due to the influence of axial pressure structures and magnetic boundaries. Moreover, this difference becomes more evident as the voltage and capacity increase. To investigate the spatial differences and time effects of EHV transformer shortcircuit faults, this paper proposes a reliability evaluation method based on dynamic relative displacement (DRDEM) for the first time. Firstly, the suitable and efficient analysis method is summarized by comparing the deviation among different calculated impedances and the measured value. Then, the space-time effect of windings is obtained by the static magnetic field and dynamic structural field based on equivalent compression supports. Furthermore, a 50 MVA/110 kV transformer is designed for the destructive short-circuit test to simulate the short-circuit ability feature of the EHV transformer. The disassembly phenomena after all the tests indicate that the DRDEM is more adaptable in characterizing the winding ability to withstand short circuit when investigating the spatial differences and time effects.

show abstract

Section: Transformer Short Circuitmentioning

confidence: 99%

A dynamic relative displacement evaluation method for extra‐high voltage transformer withstanding short‐circuit impact

Luo

et al. 2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

Optimum design of ampere-turn balance for power transformer

Cited by 1 publication

References 5 publications

A dynamic relative displacement evaluation method for extra‐high voltage transformer withstanding short‐circuit impact

A dynamic relative displacement evaluation method for extra‐high voltage transformer withstanding short‐circuit impact

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