Results 221 to 230 of about 92,641 (264)
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Modeling of power transmission and stress grading for corona protection
Computational Mechanics, 2017zbMATH Open Web Interface contents unavailable due to conflicting licenses.
T. I. Zohdi, B. E. Abali
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Statistical Algorithm for Power Transmission Lines Distance Protection
2006 International Conference on Probabilistic Methods Applied to Power Systems, 2006This paper is focused on the development of the new principles and operational algorithms of the transmission lines distance protection. The proposed distance protection algorithms utilize statistical information about the undefined and random parameters and quantities such as equivalent impedances of the systems at the unmonitored end of the power ...
Marija Bockarjova +2 more
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ntrafamily Transmission of Streptococcus pneumoniae and the Protective Power of Vaccination
Epidemiology: Open Access, 2013In May 2010 a young boy (16 months) developed clinical signs of conjunctivitis, a running nose and a cough. In a swab taken from the conjunctiva a mucoid Streptococcus pneumoniae (serotype 3) could be grown. Subsequently his father became severely ill with high fevers and bronchitis. A mucoid Streptococcus pneumoniae (serotype 3) could be isolated from
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Experimental evaluation of power differential relay for transmission line protection
2009 IEEE/PES Power Systems Conference and Exposition, 2009An experimental evaluation of a power differential relay is conducted and the results are described. The experimental setup consists of a generator connected to the network via a transmission line protected by the power deferential relay. The relay input signals, fundamental active and reactive powers, are locally computed from the complex product of ...
H. A. Darwish +3 more
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Performance analysis of power differential based transmission line protection
2017 International Conference on Energy, Communication, Data Analytics and Soft Computing (ICECDS), 2017This paper deals with investigation of novel fault detection for the protection of transmission line. Conceptually the difference of the average quantities for phase active power entering and leaving the lines are compared Computation of these quantities is carried out via simulating a tie line connecting two power system networks using MATLAB.
Surabhi Deotale, Ashish A. Dongre
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Some observations for distance protection of power transmission lines
IEEE Southeastcon 2009, 2009This paper presents some observations related to distance protection for power system transmission lines. Classical distance protection relays adopt the line terminal voltage and line current to calculate the distance between the fault and the relay location and then make a decision on whether a tripping signal should be issued and, if so, what the ...
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An Integrated Boundary Protection Scheme for Power Transmission Line Systems
International Journal of Emerging Electric Power Systems, 2008This paper presents an integrated boundary protection scheme for power transmission line systems. The scheme combines the latest developments in two areas of power system protection, the transient based protection and the integrated protection. In the proposed scheme, an integrated relay based on the boundary protection principle installed at a ...
Zhiqian Bo +4 more
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C.A.E. Software for Transmission Protection System: Puget Power Experience
IEEE Transactions on Power Delivery, 1987One major concern of a protection engineer is to achieve successful coordination of all relays in a transmission network. This tedious and laborious process is usually accomplished manually at present. In this paper we present the results of a Computer-Aided Protection System based on our experimentation with the entire 115 kV transmission network of ...
S. S. Venkata +4 more
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A backup wide‐area protection technique for power transmission network
IEEJ Transactions on Electrical and Electronic Engineering, 2017This paper proposes a wide‐area backup protection technique for transmission lines using a limited number of synchronized phasor measurement units. A binary integral linear programming is used for optimal placement of phasor measurement units to achieve fault observability.
Hany Elghazaly, Ahmed Emam, Ahmed Saber
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Impedance-differential protective algorithm for long power transmission lines
2017 18th International Scientific Conference on Electric Power Engineering (EPE), 2017In this paper, the evaluation of the concept of impedance differential scheme for long transmission line protection is presented. Using the voltages and currents of both line ends, the differential impedance is calculated. Capacitive charging current which constitutes the main drawback of current differential protection is eliminated in presented ...
Justyna Herlender, Jan Izykowski
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