Jun 2026· Journal of Physics, Conference Series· Vol 3254, pp. 042060· 0 citations· 8 references
Physics
Abstract
This study designs a multi-parameter detection platform to investigate inter-turn discharge faults in transformer oil-paper insulation. Experiments on typical defect modelreveal distinct differences in breakdown characteristics and PRPD spectra. Statistical feature analysis shows that the EMA change rate of ultra-high frequency signals is effective for early warning.
Partial discharges (PD) in large electric machines are a critical phenomenon often misunderstood. Partial discharges are neither harmless nor extremely dangerous. They indicate a localized electrical breakdown within the insulation of high-voltage equipment. Over time, especially in the long term, PD can deteriorate th...
T. Hildinger, T. E. Lamas, J. F. Cordeiro et al.· Electrical Insulation Confer...· 0 citations
To investigate the development characteristics of winding interturn insulation partial discharge in a full-scale converter transformer, an interturn insulation defect specimen was installed inside a ±400 kV full-scale converter transformer. A partial-discharge test was conducted under stepwise alternating-current (AC)...
Yunpeng Tang, Shu-Chen Ma, Hong Liu et al.· Energies· 0 citations
Power transformer windings can be damaged by internal faults, such as short-circuit currents and the forces they generate, which can lead to, e.g., internal shorts due to damaged insulation. If these faults are not detected early, they can lead to catastrophic failures. In general, distributed-parameter models can simu...
Amir Ali Kaabi Nejadian, Hamed Moradi Tavasani, Waldemar Ziomek et al.· Electrical Insulation Confer...· 0 citations
This paper investigates the aging behavior and lifetime performance of full-size stator and rotor bars subjected to realistic inverter voltage stress. A dedicated high-voltage test setup combining an AC transformer and a bipolar square-wave generator is used to simulate voltage waveforms representative of modern invert...
C. Staubach, T. Hildinger· Electrical Insulation Confer...· 0 citations
In practical power systems, transformers are continuously involved in voltage conversion and electrical-energy transmission, so once abnormal operating conditions appear inside the equipment, the influence may gradually spread to the stability of the entire grid. Because early-stage transformer faults are usually weak...
Rui Zhu· Applied and Computational En...· 0 citations
Without HV Bushings, large transformers are unthinkable and failure in any of the bushing results in transformer failure as well. Bushing failures are rarely analyzed separately from the transformer failure. The approach laid out in this paper is to expand bushing failure research so that besides terminal transformer f...
S. Bhutada· ITEGAM- Journal of Engineeri...· 0 citations
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