Journal of Artificial Intelligence in Electrical Engineering
Volume:2 Issue: 8, Winter 2014

In this paper using nested Rectangular resonator we have designed an add-drop filter based on photonic crystal structures suitable for optical communication applications. The drop efficiency and the quality factor of our proposed filter is 100% and 2508. In this filter the quality factor is significantly improved with respect to other published reports. The simulation results are obtained using 2D Finite Difference Time Domain (FDTD) method. The Photonic Band gap (PBG)is calculated by Plane Wave Expansion (PWE) method.

Overall price optimization strategy in the deregulated electricity market is one of the most important challenges for the participants, In this paper, we used Contingency Analysis Module of NEPLAN Software, a strategy of pricing to market participants is depicted.Each of power plants according to their size and share of the Contingency Analysis should be considered in the price of its hour. In the second stage, each of the power plants and cross-border supplier required forecasts on price and load request for determined hours, that can be used Artificial Neural networks. Thus, an efficient integrated model of optimized pricing for participants in the power market is extracted. The result of this study in the Azerbaijan power network for the special day and hour checked and has been provided.

This paper has developed a novel multiobjective function for optimal sizing and sitting of Distributed Generation (DG) units and capacitor banks in simultaneous mode to improve reliability and reduce energy losses. The proposed function consists of four Cost of Energy Not Supplied (CENS), System Average Interruption Duration Index (SAIDI), costs of energy loss and investment. A novel structure has been suggested for Differential Evolutionary Algorithm (DEA) to solve this nonlinear complex problem and its results compared with related values of genetic algorithm and simple DEA. In addition to the novel objective function, the other contribution of this work is proposing a new model for load and energy cost. Three types of DGs, i.e., wind turbine, solar cell and diesel generator have been employed in placement process. To verify the comprehensiveness of the proposed function, three scenarios have been introduced: Scenario i) First, placement of DGs, then capacitor banks, Scenario ii) First, placement of capacitor banks, and then DGs, and Scenario iii) simultaneous placement of DGs and capacitor banks. Simulations have been carried out on one part of practical distribution network in Metropolitan Tabriz in North West of Iran. The results of simulations have been discussed and analyzed by using of the five novel indices. The obtained simulation results using proposed function shows that the simultaneous placement of distributed generations and capacitor banks results in more reduction of the energy losses, and increase improvements of reliability indices as well as voltage profile.

Todays، use of combination of two or more methods was considered to control of systems. In this paper is presented how to design of a nonlinear H∞ (NL-H∞) controller for flexible joint robot (FJR) based on bounded UKF state estimator. The UKF has more advantages to standard EKF such as low bios and no need to derivations. In this research، based on spong primary model for FJRs، same as rigid robots links position are selected as differential equations variables. Then this model was reformed to differential equations. The results of simulations demonstrate that mixed of controller and UKF estimator lead to conventional properties such as stability and good tracking. Also، Simulation results show the efficiency and superiority of the proposed method in compare with EKF.

In this paper, a novel approach for control of the DC-DC buck converter in high-power and low-voltage applications is proposed. Designed method is developed according to passivity based controller which is able to stabilize output voltage in a wide range of operation. It is clear that in high-power applications, parasitic elements of the converter may become comparable with load value and hence, in this paper all of the converted parasitic elements are modeled during development of the controller. In order to evaluate the accuracy and effectiveness of the proposed method, designed controller is simulated using MATLAB/Simulink toolbox. Presented simulation result proves that the developed controller has acceptable dynamic and steady-state responses which are compared with a standard PI controller in high-power applications.

Synchronization of chaotic and Lu system has been done using the active sliding mode control strategy. Regarding the synchronization task as a control problem, fractional order mathematics is used to express the system and active sliding mode for synchronization. It has been shown that, not only the performance of the proposed method is satisfying with an acceptable level of control signal, but also a rather simple stability analysis is performed. The latter is usually a complicated task for nonlinear chaotic systems.

In this paper, optimization of the backstepping controller parameters in a grid-connected single-phase inverter is studied using Imperialist competitive algorithm (ICA), Genetic Algorithm (GA) and Particle swarm optimization (PSO) algorithm. The controller is developed for the system based on state-space averaged model. By selection of a suitable Lyapunov function, stability of the proposed controller is proved in a wide range of operation. Considering different optimization algorithms, steady-state and dynamic responses of the developed system are studied. In addition, THD values for different test are compared. Finally, to verify accuracy of the proposed method, designed controller is simulated using MATLAB/Simulink software.

In this paper, for the first time to our knowledge, we investigate the optical bi-stability in a compact parallel array of micro- ring resonators with 5μm radius, induced by optical nonlinearity. Due to the nature of perfect light confinement, resonance and accumulation process in a ring resonator, optical nonlinear effects, even at small optical power of a few milliwatts in this structure are observable. Different optical applications such as: all-optical switching, memory, logic gates and modulators, due to optical bi-stability in a ring resonator are possible. By using of compound semiconductors, instead of silicon that have weakly nonlinear optical properties, we improve the performance of ring-resonator based devices. Also by using of a polymer cladding layer with negative thermo-optic coefficient, we have eliminate the temperature created nonlinearity which is a very slow process, so the switching speed of a few MHz increases to several tens of GHz. With plotting the transfer function of the resonator, a hysteresis loop in a few milliwatts is observed, that by using of ring resonator array, although the bandwidth is reduced, but the width of the hysteresis loop and resolution between both steady state increases.