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This paper reports on an evolutionary algorithm based method for solving the economic load dispatch (ELD) problem. The objective is to minimize the nonlinear function, which is the total fuel cost of thermal generating units, subject to the usual constraints. The IEEE 30 bus test system was used for testing and validation purposes. The results obtained… (More)

- A. BAYADI, N. HARID, K. ZEHAR, S. BELKHIAT, Ferhat Abbas
- 2003

Data on characteristics of metal-oxide surge arresters indicates that for fast front surges, those with rise times less than 8μs, the peak of the voltage wave occurs before the peak of the current wave and the residual voltage across the arrester increases as the time to crest of the arrester discharge current decreases. Several models have been proposed to… (More)

- Farid Khaber, Abdelaziz Hamzaoui, K. Zehar, Najib Essounbouli
- Int. J. Systems Science
- 2006

The main aim of this paper is to present an improved method to solve load flow problem in balanced radial distribution systems with laterals. The method is efficient and easy to implement. Based on electric circuit laws, this method is iterative and allows the evaluation of both, voltage (rms) values and phaseangles. The phase-angles although of small… (More)

This paper presents a solution of the economic load dispatch (ELD) problem with security constraints of power systems, using an iterative technique based on the linear programming method, called Successive Linear Programming (SLP). The objective is to minimize the nonlinear function which is the total fuel cost of thermal generating units, while taking… (More)

- Abdelkrim Zebar, Khaled Zehar
- 2015

Transient stability is the ability of the power system to maintain synchronism when subjected to a severe disturbance, such as a short circuit on a transmission line. To improve stability, inductive type superconducting fault current limiter (SFCL) and shunt FACTS Controller (SVC) can be effectively used. This paper proposes the use of combined model based… (More)

- M N Harmas, Merzougui, A Ferhat-Hamida, K Zehar
- 2005

Stable power systems in adverse operating conditions remain a constant quest of power companies and clients alike. Installed capacities are being used to their utmost levels and longer transmission lines to disserve remote areas are heavily relied upon in effort to avoid costly new installations. These reasons and the apparition of low frequency local and… (More)

In this paper, we introduce a robust state feedback controller design using Linear Matrix Inequalities (LMIs) and guaranteed cost approach for Takagi-Sugeno fuzzy systems. The purpose on this work is to establish a systematic method to design controllers for a class of uncertain linear and non linear systems. Our approach utilizes a certain type of fuzzy… (More)

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