Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Farouk A. M. Rizk"'
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 37:5345-5355
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 37:2474-2481
New approach for assessment of positive streamer penetration of long air gaps under impulse voltages
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 27:791-798
The paper comprises a new systematic approach to determine the critical ambient field needed for positive streamer propagation in nonuniform field gaps. It is shown that such critical streamer penetration field is a function of the basic value previo
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 33:2420-2427
Modeling of lightning attachment to multi conductor transmission lines is made more complex by the effects of mutual conductor proximity, ground field due to cloud charges prior to negative leader descent, and operating voltage of the line. In this p
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 32:1739-1747
This paper comprises the first systematic investigation into the factors that render ultra-high voltage and double-circuit extremely high voltage transmission lines more vulnerable to direct lightning strikes by shielding failure. Such lines are typi
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 25:3122-3132
Corona characteristics of lightning rods exposed to ambient fields due to cloud charges prior to negative leader descent are analyzed, taking into account rod slenderness and relative air density. A new formula is introduced to account for the effect
Autor:
Farouk A. M. Rizk
Publikováno v:
IEEE Transactions on Power Delivery. 25:1996-2006
This paper starts with a review of anode corona modes with particularly streamer-free glow known as ultra-corona, with the view of exploring its application in lightning protection. Due to the inherent intensification of the ambient electric field at
Autor:
Farouk A. M. Rizk
Publikováno v:
2010 30th International Conference on Lightning Protection (ICLP).
It has been shown that a positive upward connecting leader from an overhead conductor spans a considerable part of the lateral attractive distance of the conductor. This justifies the effort to search for means to suppress streamers/upward leaders fr
Autor:
Farouk A. M. Rizk
Publikováno v:
2010 30th International Conference on Lightning Protection (ICLP).
For the first time, a model gives due consideration to the effect of space charge produced by trigger-wire glow-corona on continuous upward leader onset, in rocket triggered lightning under negative cloud.
Autor:
Farouk A. M. Rizk, Magdy B. Eteiba
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :1352-1360
The paper comprises a theoretical and experimental investigation into the impulse breakdown voltage-time characteristics of a spherical-particle-contaminated coaxial-cylinder gap in compressed SF 6 and SF 2 -N 2 mixture. The experimental work was car