Proceedings ArticleDOI
A modified univariate search algorithm
M.A. Al-Saleh,M. Mir +1 more
- Vol. 6, pp 306-309
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A modified univariateSearch algorithm that overcomes two major limitations of conventional univariate search method, minimizes the probability of premature convergence to poor local minima by utilizing a non-deterministic search procedure based on an analogy with the analytical univariatesearch.Abstract:
This paper describes a modified univariate search algorithm that overcomes two major limitations of conventional univariate search method. It minimizes the probability of premature convergence to poor local minima by utilizing a non-deterministic search procedure based on an analogy with the analytical univariate search, and improves' the quality of solutions by dealing with populations of solutions rather than with single solutions for solving unconstrained as well as constrained optimization problems involving continuous or discrete variables. Unlike Genetic Algorithms (GA's), which also are based on non-deterministic search and exhibit intrinsic parallelism, the solutions do not interact or mix together to produce new solutions (offspring); instead, new solutions are generated by unilaterally updating a single variable at a time in individual solutions. Results of two test problems are presented and compared with those obtained by standard GA, modified GA, and an optimization program based on the method of feasible directions.read more
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Controller for the Grid-Connected Microinverter Output Current Tracking
TL;DR: The obtained results show that in the case when the proportional constant of the PI controller varies in time according to the appropriate law, the microinverter output current sinus shape distortions decrease as compared to the cases when the ordinary PI controller is used.
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A Digital Simulator for Determining the Performance Limits of Computer Relays
Mustahsan Mir,M.A. Al-Saleh +1 more
TL;DR: The digital simulator presented in this paper generates the worst-case waveforms for specified bounds on noise components present in the relay input signals, and determines the performance limits of a computer relay by performing a single test only.
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Using least square svm for nonlinear systems modeling and control
TL;DR: The paper firstly introduces the mathematical model of regression least squares support vector machine (LSSVM), and designs incremental learning algorithms by the calculation formula of block matrix, which is used to model nonlinear system, based on which to control nonlinear systems by model predictive method.
References
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Journal ArticleDOI
Nonlinear programming approach to automated topology
M. H. Imam,Mustahsan Mir +1 more
TL;DR: An analytical approach to the optimization of the topological configuration of a set of functional blocks is presented, expressing the overlapping of blocks as an inequality constraint in a formulation based on nonlinear optimization, so that the blocks can move freely without any overlap during the optimization process.
Journal ArticleDOI
Adaptive vs. conventional reach setting of digital distance relays
TL;DR: In contrast to the conventional approach of setting the reach of a distance relay based on off-line worst-case studies, the adaptive approach adjusts the relay on-line on the basis of the current power system state as discussed by the authors.