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In this paper we describe an efficient approach for solving the economic dispatch problem using Genetic Algorithms (GAs). We recommend the use of adaptive probabilities crossover and mutation to realize the twin goals of maintaining diversity in the population and sustaining the convergence capacity of the GA. In the Adaptive Genetic Algorithm (AGA), the(More)
This electric power distribution system delivers power to the customers from a set of distribution substations. While the transmission lines are configured in a meshed network, the distribution feeders are configured radially in almost all cases. The proposed problem in this work is to determine the optimal topology among a various alternatives. This(More)
The performance of an HVDC link is significantly impacted by the relative strength of the AC system to which it is connected. However, the interaction between AC and DC systems and the associated problems are very much dependent on the strength of the AC system relative to the capacity of the DC link. This paper explores the effect of the DC control on(More)
The aim of this paper is to present a solution to the problem of induction machines rotor flux reconstruction and rotor resistance estimation by using a sliding mode observer based on singular perturbation theory. This approach allows the decomposition of the original model, described in two-time-scales, into two reduced-order models. Based on simulations,(More)
Transmission lines are a vital link in HVDC transmission systems. Transients originated in the lines themselves (e.g., short circuits, lightning) or originated in the substation equipments (e.g., rectifier, inverter) propagate from one part of the HVDC system to another through the transmission lines. This paper presents a summary of the main transmission(More)
The VSC HVDC back-to-back arrangement is used when two asynchronous AC systems need to be interconnected for bulk power transmission or for AC system stabilization reasons. Besides controlling the through power flow, it can supply reactive power and provide independent dynamic control at its two terminals. This paper investigates the steady-state and(More)
This paper investigates the steady-state and transient performance of high-voltage DC (HVDC) transmission systems connected to passive network. The VSC HVDC tie employing PWM may well represent the ultimate FACTS device. In addition to the control of the active power flow, it can supply reactive power and provide independent dynamic control at its two(More)
The Flexible AC Transmission System (FACTS) provides a new advanced technology solution to improve the flexibility, controllability and stability of a power system. The Unified Power Flow Controller (UPFC), as an outstanding part one for regulating power flow among the FACTS, can control respectively transmission line real power, reactive power and node(More)
This paper describes and uses an ant colony meta-heuristic optimization method to solve the redundancy optimization problem in plastic recycling industry. This problem is known as total investment-cost minimization of series-parallel plastic recycling system. Redundant components are included to achieve a desired level of availability. System availability(More)