High voltage insulation suffers from aging processes caused by the electrical, mechanical and thermal stresses of normal operation. Failure of equipment containing high voltage insulation can be sudden and catastrophic, leading to risk of injury to personnel and damage of expensive equipment. On line monitoring of electrical signals has been shown to provide useful diagnostic information. The p...

Transformers are generally considered to be the costliest assets in a power network. The lifetime of transformer is mainly attributable condition its solid insulation, which turn measured and described according degree polymerization (DP) cellulose. Since determination DP index complex time-consuming requires taken out service, utilities prefer indirect non-invasive methods determining based on...

Power cable is mainly responsible for the transmission and distribution of electric energy in power grid. The performance a greatly affects reliability security supply. In order to solve problem aging caused by long-term operation various internal external factors, this paper proposes an abnormal line loss identification method low-voltage network station area, aiming at focusing on monitoring ...

Photovoltaic (PV) modules with a degrading backsheet pose challenge for solar park operators and other players in the PV value chain. Some types of backsheets are known to develop cracks because an aging-induced change mechanical characteristics material during operation field, which result loss insulation resistance. In this work, we present solution repair preventive maintenance based on sing...

In this paper, a Markov maintenance model for predicting the remaining life of transformer insulation has been developed. It incorporates various stages of insulation deterioration and minor maintenance state. Given that a current state of insulation ageing has been reached, from a diagnostic testing and inspection, this model is capable of computing the predicted average time before insulation...

In this paper, a novel algorithm for estimating clothing insulation is proposed to assess thermal comfort, based on the non-contact and real-time measurements of the face and clothing temperatures by an infrared camera. The proposed method can accurately measure the clothing insulation of various garments under different clothing fit and sitting postures. The proposed estimation method is inves...

The operation of Nb–Ti superconducting magnets in He II relies on superfluidity to overcome the severe thermal barrier represented by the cable electrical insulation. In wrapped cable insulations, like those used for the main magnets of the Large Hadron Collider (LHC) particle accelerator, the micro-channels network created by the insulation wrappings allows to efficiently transfer the heat dep...

Abstract The main components of the transformer face overheating and insulation aging caused by electromagnetic losses, which affect their service life. This paper analyzes an oil-immersed with a rated voltage 800kV based on heat transfer fluid dynamics principles. temperature distribution is carried out magnetic-thermal coupling simulation. influence oil flow rate analyzed in thermal field cal...