Results 261 to 270 of about 786,447 (315)

Justifying pilot protection on transmission lines

2010 63rd Annual Conference for Protective Relay Engineers, 2010
This paper concerns the justification of the use of pilot protection on transmission lines.
Gary Kobet, Bogdan Kasztenny, Mark Allen, Art Buanno, Albert N. Darlington, Alla Deronja, Hyder DoCarmo, Jerry Finley, George Gresko, Larry Henriksen, Mike Jensen, Bill Kennedy, Kazik Kuras, Vahid Madani, Walter McCannon, Mike McDonald, John Miller, Mukesh Nagpal, Jim O'Brien, Frank Plumptre, Elmo Price, Sam Sambasivan, Mark Simon, Jian Cheng Tan, Ilia Voloh, Solveig Ward, Ray Young   +26 more
openaire   +1 more source

Pilot Backup Protection Based on Wireless Communication

2017 Ninth Annual IEEE Green Technologies Conference (GreenTech), 2017
The paper presents a back-up protection scheme for loop system from all types of fault based on the directional element. The traditional back-up protection schemes such as distance protection and overcurrent protection are not suitable for the loop system.
Zhenmin Tang, Qiushi Wang, George Karady
openaire   +1 more source

Protective films for pilot‐plant deodorizers

Journal of the American Oil Chemists' Society, 1951
SummaryWith mild agitation, soybean oil is not appreciably contaminated by contact with clean steel surfaces unless the fatty acid content is above 0.1% and the temperature above 150°C.It has been shown that an oxidized oil film is an effective coating for metals used in the construction of pilot‐plant deodorizers.
R. E. Beal, E. B. Lancaster
openaire   +1 more source

Pilot Protection Systems

2009
This chapter contains sections titled: Introduction Physical Systems for Pilot Protection Non-Unit Pilot Protection Schemes Unit Protection Pilot Schemes An Example of Extra High Voltage Line Protection Pilot Protection Settings Traveling Wave Relays Monitoring of Pilot Performance References ...
openaire   +1 more source

Anti-dazzling protection for Air Force pilots

SPIE Proceedings, 2012
Under certain conditions, laser directed at aircraft can be a hazard. The most likely scenario is when a bright visible laser causes distraction or temporary flash blindness to a pilot, during a critical phase of flight such as landing or takeoff. It is also possible, that a visible or invisible beam could cause permanent harm to a pilot's eyes.
Ariela Donval, Tali Fisher, Ofir Lipman, Moshe Oron   +3 more
openaire   +1 more source

Pilot-wire protection of transmission lines

Electrical Engineering, 1960
THE PRESENT pilot-wire protective systems for transmission lines employing leased pilot-wire circuits are an outgrowth of conventional differential protective systems for other types of electric apparatus. Thus, these line-protective systems are characterized by the fact that the pilot wires are part of the differential connection between the current ...
openaire   +1 more source

Impedance-Differential Protection: A New Approach to Transmission-Line Pilot Protection

IEEE Transactions on Power Delivery, 2015
Differential protection is able to provide the most selective protection compared with other protective schemes. In this paper, a new differential scheme is proposed for pilot protection of transmission lines. The concept of differential impedance ( ${\rm Z}_{\rm diff}$ ) is introduced using the synchronous voltages and currents of both terminals of
Tohid Ghanizadeh Bolandi, Heresh Seyedi, Sayyed Mohammad Hashemi, Peyman Soleiman Nezhad   +3 more
openaire   +1 more source

Circulating-current pilot-wire differential protection system

Proceedings of the Institution of Electrical Engineers, 1967
A circulating-current a.c. pilot-wire differential protection scheme is described in which compensation is provided for the phase shift of the fundamental-frequency signals transmitted over the pilot-wire circuit. Alternative relay characteristics are considered, with particular reference to the desirability of maintaining simultaneous tripping of ...
openaire   +1 more source

Novel wavelet approach to current differential pilot relay protection

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491), 2002
Summary form only given. This paper describes a novel technique for current differential pilot relay protection (CDPR) by using wavelet analysis. PSCAD is used to generate current signals at both ends of a transmission line in a typical system with fault at various locations.
C. K. Wong, C. W. Lam, K. C. Lei, C. S. Lei, Y. D. Han   +4 more
openaire   +1 more source

Pilot protection

IEEE Industry Applications Magazine, 2009
Richard Hunt, Mark Adamiak, Al King, Steel McCreery   +3 more
openaire   +1 more source