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The Using Of Genetic Algorithm to Increase the Reliability of The Electrical Power System

استخدام الخوارزميات الجينية لزيادة الموثوقية في نظم القدرة الكهربائية

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 Publication date 2018
and research's language is العربية
 Created by Shamra Editor




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In this paper, a modern method of restoring service in electrical power systems was examined through an automated coordination center using genetic algorithms.

References used
Roy Billinton, Ronald N. Allan, " Reliability Evaluationof Power Systems ", 2010 , Second Edition. Plenum Press. New York and London
Yuan-Yih Hsu, S.K. Peng, H.S.Yu k. "Distribution system service restoration using a heuristic search approach ",2011 , 0-7803- IEEE
A. Augugliaro , L. Dusonchet, E. Riva Sanseverino , " Multiobjective service restoration in distribution networks using an evolutionary approach and fuzzy sets" ,2010 Electrical Power and Energy Systems 22
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With the increasing use of technologies and automation in different sides of modern life, the outage of electricity became a big issue that widely affects the daily life of most sectors like industrial, economical or even entertaining sector. So it became so necessary to achieve a high-reliability electrical system to insure the continuation of electricity supply to the end consumer. Consequently, in this research, we are studying a new method of service restoration using genetic algorithms to increase the reliability of distribution systems and improving its performance. The research includes a brief aver view of electrical systems reliability and the basics of Genetic Algorithms and the use of these techniques in dispatching centers. In addition we have designed a program in "MATLAB" environment to apply the service restoration technique using genetic algorithms, and the program has been tested on a case study with the relative results shown .
Operating the electrical power systems at normal conditions is our goal always. This is what represents the ideal state of electrical power system work. Hence, the electrical power system work in case of insufficient electrical power requires avoid ing since it leads to big losses in national economy. These losses could be huge when we talk about connection borders between systems as per overload frame, because of lack of electrical power request. The impact of these conditions could be noticeably decreased at a reasonable limit of electrical power request. When we find out the optimal solution of electrical power systems operation and the communication lines between them while considering the losses of consumers disconnecting that guarantee the stability of loads. Finally, it is so at full use of maneuver (available cases) spare power properties when applying the instant correction of regime. This paper studies the basic approach to solve these issues which imply the reliability definitions.
Application Of Object Oriented Programing OOP concept and the C++. Pascal programming language to power system simulation has been explored. An efficient platform for power system simulation applications has been proposed. By emulationg a physical power lap, a generic power network container has been build, a module. One load flow applications a ac load flow have been discussed. It is found that the OOP based Pascal load flow programs are as efficient as their non – OOP counterparts.
After selecting real seismic records it is necessary to scale these records to match the intensity of the earthquake expected for the site. Generally, scaling can be made by ground motions uniform scaling in time domain which is simply scaled up or d own the ground motions uniformly to best match (in average) the target spectrum within a period range of interest. It’s an engineer’s job to find the best scaling factors to best match the target spectrum, which is a complex task, so we employed the Genetic Algorithm (GA) in finding those scaling factors to achieve the best results. Genetic Algorithms (GAs) are probably the best-known types of artificial evolution search methods based on natural selection and mechanisms of population genetics. These algorithms are often applied to large, complex problems that are non-linear with multiple local optima. The power of the genetic algorithms is inherent in its capability to adapt. In natural systems, species adapt to the environment through successive interactions and generations subject to the environment. After several consecutive generations, only those species that can adapt well to the environment survive and the rest disappear. In mathematical terms, individuals are analogous to problem variables and environment is the stated problem. The final generation of the variable strings that can adapt to the problem is the solution. In this study, basic methodologies of the GA and the scaling procedures are summarized and the scaling criteria of real time history records to satisfy the Syrian design code are discussed. The traditional time domain scaling procedures and the scaling procedures using GA are used to scale a number of the available real records to match the Syrian design spectra. The resulting time histories of the procedures are investigated and compared in terms of meeting criteria.
This research aims to achieve the observability of any electrical network by the possibility compensation the lost measurements due to a defect, allowing the possibility of state estimation of the electrical network ,ie, obtaining a single solution for a state estimation. This is done by means of the network observability analysing using the available set of measurements and adding virtual pseudo-measurements if the network is not observable. this is done using a numerical algorithm that ensures obtaining the minimum and optimal number of added critical pseudo-measurements so that the result of state estimation was not adversely affected. The algorithm depends on solving the equation of the linear state estimation and the analysing to the triangular factors of the gain matrix and an easy way to arrange the axis of the jacobian matrix ,ie, the measurements matrix to ensure getting the minimum set of candidate pseudo- measurements to be added to real measurements, the numerical algorithm was acheived by environment in the MATLAB and tested to present the results on the network observabilty analysing and adding the pseudo-measurements algorithm on state estimation .The results of the program were tested on IEEE-14 network, and they showed that if a number of measurements were lost, they would be compensated by critical and pseudo-measurements. The results of state estimation showed small error ratio between estimated values using the real measurements and the estimated values after added the critical pseudo-measurements.
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