Transients associated with partial discharges in voids can be described in terms of the charges induced on the terminal electrodes of the system. The relationship between the induced charge and the properties which are usually measured is discussed. The method is illustrated by applying it to a spheroidal void located in a simple disk-type GIS spacer. I N T R O D U C T I O N HE transients which...

Testing of high voltage apparatus for partial discharges has long been recognized as an important part of quality control for these devices. Recently, interest has been focused on methods for testing low voltage cables to determine their integrity under adverse operating conditions such as a loss of coolant accident. A new method, utilizing partial discharges, is presented which has the potenti...

OBJECTIVES Approximately two-thirds of the patients with newly diagnosed partial epilepsy remained on their first antiepileptic drug (AED) for 2 years in clinical practice. We aimed to analyze retention on the first AED for 2 years in newly diagnosed cryptogenic partial epilepsy patients in clinical practice and whether the presence of epileptiform discharges on the initial EEG was a predictor ...

PURPOSE To characterize seizure types and electroencephalographic features of glucose transporter type 1 deficiency syndrome (Glut-1 DS). METHODS Twenty children with clinical and laboratory features of Glut-1 DS were evaluated. Age at seizure diagnosis, seizure classification, and response to treatment were determined by chart review. Thirty-two continuous 24-h EEG monitoring sessions and re...

Design of Converter transformer insulation is a major challenge. The insulation of these transformers is stressed by both AC and DC voltages. Particle contamination is one of the major problems in insulation structures, as they generate partial discharges leading it to major failure of insulation. Similarly corona discharges occur in transformer insulation. This partial discharge due to particl...

Artificial intelligent techniques have been widely used in high voltage insulation technology application. In this paper, the effectiveness of artificial intelligent technique to apply for pattern recognition and classification of Partial Discharge (PD) is presented. Partial discharge signal was generated and measured by using an artificial partial discharge source. Characteristics of PD signal...

Medium voltage cables are poor transmitters of signals with high frequency spectrum such as partial discharges. The propagating strongly attenuated and distorted depending on the transmitted distance. In order to understand this process, article provides a model simulate transmission medium cables. Compared earlier approaches, does not neglect wave character signals. Therefore, describe signal ...