NASA’s Solar Probe Plus (SPP) mission will make the first in situ measurements of the solar corona and the birthplace of the solar wind. The FIELDS instrument suite on SPP will make direct measurements of electric and magnetic fields, the properties of in situ plasma waves, electron density and temperature profiles, and interplanetary radio emissions, amongst other things. Here, we describe the...

Transformer together with its windings is a complex oscillatory system. The interaction between the transformer and an electric network during transients can cause development of resonance phenomenon in leading to overvoltages risk fault. This report presents results studies phenomena windings, caused by containing feeder cable. approach simple assessment dominant oscillation frequency voltage ...

Risk assessment for power transformer is an important means to guide the condition based maintenance of transformer and enhance the reliability of power system operation, but also to strengthen the power transformer to provide an important basis for quality control. In this paper, an index system for comprehensive evaluation of transformer is put forward and a risk assessment model for power tr...