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Oil-immersed transformers are key components in power systems. The inordinate temperature rise in oil-immersed transformers, featured by hot-spot temperature (HST), accelerates thermal degradation in insulation. This phenomenon may result in reduction of service age or thermal breakdowns of transformers. HST is also an important parameter to determine the optimum load ability of transformers. A procedure...
In this paper, an axial symmetric model is constructed to investigate the electrical contact characteristics of YBCO bulk with silver deposited on the contact surface. In order to calculate the thermal-electromagnetic coupling characteristics near the contact spot, a series expression is derived to describe the quenching behavior of YBCO bulk based on the power law and Kim model and a detailed thermal-electromagnetic...
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