In this thesis I investigate the possibility of electrically detecting partial discharges in high voltage equipment. Partial discharges are small events that occur in insulation in the presence of high electric field intensity and manifest themselves as pulses of current superimposed on the high voltage lines. They carry important information about the condition and operation of such equipment....

Partial discharges can occur in different types of electric equipment and cause progressive insulation deterioration, so there is interest monitoring partial for assessing the state isolation an system to predict failures. Techniques detect discharges, such as detecting ultrasonic emission, have been proposed literature, but various effects co-occur during a discharge, identifying characteristi...

Analytical expressions are deduced for the quantitative evaluation of the charge induced on an electrode by a partial discharge (PD) within a dielectric body. Two approaches have been employed to effect this evaluation. These are characterized by the X function and the $ function, and the essential relationships to be fulfilled by X and q5 are derived. The principal difference between these fun...

A fiber optic interferometric sensor with an intrinsic transducer along a length of the fiber is presented for ultrasound measurements of the acoustic emission from partial discharges inside oil-filled power apparatus. The sensor is designed for high sensitivity measurements in a harsh electromagnetic field environment, with wide temperature changes and immersion in oil. It allows enough sensit...

This paper reports the results of analysis measurements involving partial discharges (PD) occurring in air using a corona camera (UV camera). The were carried out laboratory conditions and applied two electrode systems: needle–needle needle–plate, order to obtain various electric field distributions. PDs, including variety alternatives, portable UV camera, taking into account impact gain parame...

OBJECTIVE Corpus callosotomy tends to decrease seizure frequency and severity rather than transforming the seizure pattern from a generalized form into a lateralized or a partial one. The finding implies that bisection of the corpus callosum (CC) disrupts the epileptogenicity itself. In order to gain further insight into the possible role played by the CC in intractable generalized epilepsy, qu...