Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Mat Darveniza"'
Publikováno v:
Australian Meteorological and Oceanographic Journal. 61:107-112
The occurrences of positive and negative polarity cloud-to-ground lightning flashes were detected by ground-based lightning flash counters CGR4 in Brisbane,Australia. Positive (negative) flashes constituted 2–5 per cent (95–98 percent) of total c
Publikováno v:
Australian Meteorological and Oceanographic Journal. 58:263-273
The design of the CGR4 lightning sensor is based on several observed characteristics of the electric field changes caused by nearby lightning, and the radiofrequency noise bursts from lightning. The electric field signals from lightning are detected
Autor:
Mat Darveniza
Publikováno v:
IEEE Transactions on Power Delivery. 22:605-612
The effects of ground resistivity (rho) on overhead line voltages induced by nearby lightning flashes to ground are reviewed and descriptions are given of experimental field data and of analytical studies of these effects. A semi-empirical extension
Publikováno v:
Scopus-Elsevier
This paper describes the analysis of thermally accelerated aged insulation samples to investigate the degradation processes observed in the insulation of aged transformers. Accelerated ageing experiments were performed on paper wrapped insulated cond
Publikováno v:
Journal of Geophysical Research: Atmospheres. 103:19791-19809
A worldwide survey of the ratio of cloud flashes to ground flashes in thunderstorms using CGR3 (Cloud-Ground Ratio #3) instruments at sites covering a latitude range from 59.9°N to 27.3°S between 1986 and 1991 inclusive has provided information on
Publikováno v:
IEEE Transactions on Power Delivery. 13:1214-1223
This paper investigates the effective diagnostic technique(s) for assessing the condition of insulation in aged power transformers. A number of electrical, mechanical and chemical techniques were investigated. Many of these techniques are already use
Publikováno v:
IEEE Transactions on Power Delivery. 12:1168-1175
Multiple stroke lightning ground flashes can impose surges of exceptional severity on exposed distribution surge arresters. This paper describes a series of tests on metal-oxide (MO) arresters and varistors to study surface flashover mechanisms. The
Publikováno v:
IEEE Transactions on Power Delivery. 12:1555-1561
This paper describes the analysis of accelerated aged insulation samples to investigate the degradation processes observed in the insulation from aged power transformers. Short-term accelerated ageing experiments were performed on paper-wrapped insul
Publikováno v:
IEEE Transactions on Power Delivery. 12:1547-1554
This paper describes the application of two relatively new diagnostic techniques for the determination of insulation condition in aged transformers. The techniques are: (a) measurements of interfacial polarization spectra by a DC method; and (b) meas
Publikováno v:
IEE Proceedings - Science, Measurement and Technology. 144:1-10
Simple air terminals are earthed conducting objects able to launch a connecting streamer or leader discharge that intercepts a downward lightning leader discharge and diverts to itself the lightning strike. Early streamer emission (ESE) air terminals