1,720,999 research outputs found
A Synchronized event logger for substation topology processing
No full textWe present a topology processing technique for substations. The proposed technique synchronizes substation event information using a logging system, overcoming existing problems of SCADA systems, such as inaccurate timing information of substation events and unreliable topology processing in presence of bad data. The design of the proposed event logging system and its application are also presented.Yang Liu, Rastko Zivanovic, Said Al-Sarawi Cristian Marinescu and Richard Cochra
Continuation via quadratic approximation to reconstruct solution branches and locate singularities in the power flow problem
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Agent technology used in power systems
No full textAgents are believed to be an important new way of conceptualizing and implementing certain types of software applications. This work will give an overview of how intelligent agent technology can be used in power systems and power application software. At first, agent technology is briefly introduced. Thereafter, the use of agent technology is proposed for power system state estimation, database environments and demand management. The paper ends with a conclusion and recommendations for future work.Ralf Biernatzki, Berthold Bitzer, Rastko Zivanovic, Andries Els, Stephan El
Global sensitivity and uncertainty analysis of transients in the Universal Line Model
No full textOne of the main aspects of designing and operation prediction of any power system is to simulate its Electromagnetic Transient's (EMT) performance. Among the available power line models, Universal Line Model (ULM) is an efficient and accurate model for this purpose. There are random system parameters which affect the quantities of EMT output qualities. This paper presents a novel global sensitivity and uncertainty analysis techniques to determine the effect of these uncertain factors on the variation of the EMT outputs.Neda Shahabi, Rastko Zivanovic, Nicolangelo Iannella, Said Al-Saraw
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Parameter identification of a wind generator unit RMS model using sparse grid optimization algorithm
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