Dry-type transformers are vital in mining applications, directly influencing the safety and stability of power systems. With the increase in non-linear loads, harmonic currents introduce additional electromagnetic and thermal stresses, exacerbating temperature rise-a key factor limiting transformer lifespan, particularly for dry-type units with limited heat dissipation. This paper investigates a m...Show More
Cross-linked polyethylene is widely used as the insulation of power cables due to its superior insulation and mechanical properties. Electrical trees is one of the main reasons for the breakdown of cable insulation. In order to explore the growth process and partial discharge characteristics of electrical trees in cross-linked polyethylene, cuboid samples taken from a commercial cable and a needle...Show More
It is a common phenomenon for high voltage (HV) motor that bearing bush leaks oil during operation. The oil contamination will etch stator windings and dissolve the ground-wall insulation, make the insulation and wire stratified, reduce the strength of insulation, and finally lead to partial discharge (PD). In addition, water vapor will make the condition worse. Contamination or water vapor covere...Show More
Wireless power transfer (WPT) by coupled magnetic resonance is a popular technology, which power can be transferred via coupled magnetic resonance in the non-radiative near-field. This paper presents a magnetic coupling resonance WPT system with class-E inverter along with its parameters calculation and simulation. By using the class-E inverter as a transmitter, the WPT system can achieve high pow...Show More
Three types of partial discharge (PD), including slot discharge, corona discharge at the slot exit, and bar-to-bar discharge existing on the surface of the ground wall insulation involving 10kV HV motors were presented in this paper. PD patterns were induced through off-line experiment by using single factor aging stator coils embedded into a real stator core slot. The phase resolved partial disch...Show More