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Mohamed M. Saied
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- Professor (Emeritus), Independent Researcher Department of Electrical Engineering, Kuwait University, Kuwait Cairo Egypt
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Abstract
nThis paper addresses the simulation of the transients developed in high voltage lines, which are initiated by lightning discharges. The analysis allows for compensated and uncompensated lines. Both the individual and simultaneous series inductive and shunt capacitive compensation types can be dealt with. The sizes and locations of the compensating elements are included in the analysis. Numerous studies on the transient concentrated stresses across these elements and the related protection concerns have been carried out in recent years. With the use of sophisticated computer programs, like the well-known Electromagnetic Transient Program (EMTP), it is possible to assess and mitigate eventually excessive transient voltages and currents by using high power varistors and arresters. The derived mathematical model includes simultaneous partial differential equations governing the current and voltage along the line as functions of the location and time subject to appropriate initial and boundary conditions. A Mathematica approach is adopted in order to get the current and voltage in the Laplace s-domain followed by their numerical inversion to the time-domain. The model and computer code are validated via discussing the results of special cases of known exact solutions.
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Keywords: Electromagnetic, transients, simulation, high voltage lines, towers, series, parallel, compensation, differential equations, mathematica, numerical laplace inversion
n[if 424 equals=”Regular Issue”][This article belongs to International Journal of Electrical Power and Machine Systems(ijepms)]
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References
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- John Grainger, William Stevenson: “Power System Analysis”, Book, McGraw-Hill, Intl. Edition, Chapter 6 & Appendix A, 1994.
- I. Elgerd: Electric Energy Systems- An Introduction”, Book, McGraw-Hill, Second Edition, 1982.
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- Julian Correa:”EMTP Theory Book”, System Engineering, Bonneville BPA, Portland, Oregon, 1983
- Rakosh D. Begamudre:”Extra-High Voltage AC Transmission Engineering”, Book, Wiley-Eastern Limited, Second Edition, 1986.
- J. Miller (editor): “Reactive Power Control in Electric Systems”, Wiley Inter-Science, 1982.
- Yousef Safar, Mohamed Saied: The Feasibility of Multiple-Capacitor Long Line Series Compensation”, Journal for Electric Machines and Power Systems, USA, Vol. 23, No. 5, Sept./Oct. 1995, pp. 483-500.
- Mohamed Saied “The Stresses in the Metal-Oxide Varistors Protecting the Capacitors of Series-Compensated Lines”, March 2000
- Yousef Safar, Mohamed Saied: ‘The Feasibility of Multiple-Capacitor Long Line Series Compensation”, Journal for Electric Machines and Power Systems, USA, Vol. 23, No. 5, Sept./Oct. 1995, pp. 483-500.
- Mohamed Saied: ‘Optimal Long Line Series Compensation’ IEEE Transactions on Power Delivery 1(2):248 – 253, May 1986.
- Mohamed Saied: The Fault Transients and Varistor Energy Dissipation in MOV-Protected Series-Compensated Power Lines’, Available at https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=Mohamed+Saied++varistors&oq=Mohamed+Saied++Varistor
- Rudresh B. Magadum , B. Kulkarni:””Performance Enhancement of Distribution Network by Optimal Placement of Multiple Capacitors USING FKBC”, Conference paper, First Online: 27 March 2020, Part of the book series: Advances in Intelligent Systems and Computing ((AISC,volume 1119))
- Wolfram Mathematica:” Comparing Four Methods of Numerical Inversion of Laplace Transforms (NILT), A Wolfram Mathematica Demonstration Project”. Version 12.1
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| Volume | 01 | |
| [if 424 equals=”Regular Issue”]Issue[/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] | 02 | |
| Received | April 13, 2024 | |
| Accepted | April 18, 2024 | |
| Published | April 27, 2024 |
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