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Active power differential algorithm for protection of transmission lines
PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376), 2003A differential algorithm for phase selective detection of high impedance single-phase-to-ground faults (HIF) on high voltage lines is presented. It is based on the recognition of the fundamental frequency active power consumption of a resistive fault.
F. Oechsle +3 more
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Methodology for Protection Performance Evaluation on Power Transmission Networks
IEEE Transactions on Power Delivery, 2018An innovative methodology for protection performance evaluation on transmission networks is presented in this paper. It was developed to overcome difficulties faced by the Brazilian utility Companhia Hidro Eletrica do Sao Francisco (CHESF) during the preparation of short-circuit reports that must be sent to regulatory organizations whenever ...
F. V. Lopes +7 more
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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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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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Galvanic Cathodic Protection for Power Transmission Tower Grillage Foundations
Materials Performance, 2016Cathodic protection (CP) of underground steel structures is a mature technology for structures with simple geometries, such as pipelines and storage tanks. Nevertheless, this technology is not well-adapted to structures with irregular geometries, where application of conventional anode bed designs are formidable due to the interplay of geometrical and ...
Peyman Taheri, Mehrooz Zamanzadeh
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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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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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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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