Number 1 Volume 1

Open Access Article

1 - Comprehensive Design of Street Lighting Networks in Distribution Power Utilities: an Optimal Approach
Ali Mohammadi Seyed Ali Hosseini

The design of street lighting networks in electric distribution companies has always been associated with its own challenges due to two aspects in terms of meeting the requirements of street lighting calculations and electrical analyzes and the need for economic analysi More

The design of street lighting networks in electric distribution companies has always been associated with its own challenges due to two aspects in terms of meeting the requirements of street lighting calculations and electrical analyzes and the need for economic analysis and cost-effectiveness on the other hand. It is considered different from the preparation of ordinary plans in technical departments. The most important reason for this complexity is the lack of access to optimal design tables considering all design parameters related to lighting and electrical parts in compliance with the necessary standards, so that currently each lighting project must have an independent study. In this study, actual conditions of street lighting networks are taken into account, including the type of network, conductors, etc. It should be consistent with the reality of the electricity industry and not just academic. By the simulation in Dialux evo and DIGSilent Power Factory software, comprehensive optimal design tables according to the type of light, network conductor, network configuration, maximum length of lighting networks and minimum capacity of transformer resulting in the range of standard voltage quality and acceptable loading range of distribution substations, These tables can help designers and, at a high level, decision-makers in technical subjects. Manuscript profile

Open Access Article

2 - Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach
amirhosein rostamPour Assef Zare Narges Shafaei

Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach Synchronization of a Class of Neutral Chaotic Systems based More

Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach Synchronization of a Class of Neutral Chaotic Systems based on Adaptive Sliding Mode Control Approach In this paper, adaptive control mechanism for finite time synchronization of a specific class of neutral chaotic systems is considered equal to unknown Delays disturbance and uncertainty. Delays and parameters are considered and different for two neutral chaotic systems equal to the master and the slave. The neutral chaotic system is introduced using a positive Lyapunov exponent and finite Attractor. in the proposed adaptive control mechanism two linear and adaptive sliding mode controllers have been used for synchronization.in the proposed approach control mechanism,the rules for updating the unknown parameters have been introduced by Lipshitz condition in chaotic system and use of Lyapunov function stability proposed control system in robust synchronization mentioned system have been confirmed. Finally, synchronization is performed between the master and slave neutral chaotic system )Jark and Gensiotsio( with nonlinear uncertainty and external disturbance as well as parameters and unknown time delay. Examination of the simulation results shows that the controller overcame the external disturbance and boundary uncertainty in the shortest time. And The estimation of the parameters of the main system is well done, which indicates the accuracy of the theory analysis. Manuscript profile

Open Access Article

3 - Design and simulation of an EMC filter for a flyback converter
atila eskandarnezhad عبدالعزیز کلته Nowruz Abdollahi

Electronic equipment's require supply voltage with different values that can create a stabilized voltage at the output in the conditions of changing the source voltage and load current. The flyback switching converter is a suitable option for producing different voltag More

Electronic equipment's require supply voltage with different values that can create a stabilized voltage at the output in the conditions of changing the source voltage and load current. The flyback switching converter is a suitable option for producing different voltages in such conditions. Due to the high frequency switching, the electromagnetic components with significant power are directed from the converter side to the power lines and also radiated to the surrounding space, which causes electromagnetic pollution and EMI radio interference. In this article, an effective and practical method for designing and adjusting the EMC electromagnetic compatibility filter is presented. Adjusting the filter values is based on averaging the noise circuit by considering its equivalent impedance. In most of the proposed methods for filter design, the noise source is assumed as an ideal current source and the equivalent impedance of the noise is not considered. This reduces the accuracy of the design and prevents the correct filtering of the components in some frequencies. In this article, the circuit averaging of the entire structure of the converter is done by considering the parasitic elements, because the closer the presented model is to the real structure, the more effective the filter is, and the more effectively it removes radio interference components. In the end, the software simulation shows the accuracy and efficiency of the proposed method in EMI filter design. Manuscript profile

Open Access Article

4 - Reducing Overcurrent and Overvoltage Stresses due to Open-circuiting of UIPC
Javad Pourhossein Gevork B. Gharehpetian

The unified interphase power controller (UIPC) is basically a series-type power flow controller that behaves like a current source. Hence, an open-circuit fault at the terminal of this device can result in severe stress. The opening of the device terminal results in a d More

The unified interphase power controller (UIPC) is basically a series-type power flow controller that behaves like a current source. Hence, an open-circuit fault at the terminal of this device can result in severe stress. The opening of the device terminal results in a dual-branch parallel circuit in each phase (one RL and one RC), which disconnected from the line, and forms a series RLC circuit locally excited by two series voltage source converters (VSCs). This condition has high circulating current and overvoltage at the midpoint i.e., at the open-circuited terminal of the device. These may cause flashovers and serious damages to the device. In this research, a technique based on the discontinuous control of the device is proposed to overcome the mentioned problems. Based on the technique, the injected voltages of two VSCs are immediately reset to zero after an open-circuit fault so that the circulating current and consequently the overvoltage can be reduced. The evaluation of the proposed technique has been done through computer simulations in the Digsilent software environment and then analyzing the results in the form of a curve. In the following, the analysis and comparison of the results have shown that the proposed technique has high efficiency. It should be noted that this technique can be applied to all members of the UIPC family. Manuscript profile

Open Access Article

5 - Lorenz hyper chaotic system parameter estimation using improved whale optimization algorithm with Tabu Search
Mahsa Esmaeilnia Mostafa Saadatifar Mahdi Yaghoobi

Lorenz hyper chaotic system parameter estimation using improved whale optimization algorithm with Tabu Search Chaotic systems are very complex dynamic systems that have some special characteristics such as high sensitivity to initial conditions, lack of statistical pre More

Lorenz hyper chaotic system parameter estimation using improved whale optimization algorithm with Tabu Search Chaotic systems are very complex dynamic systems that have some special characteristics such as high sensitivity to initial conditions, lack of statistical prediction, and despite seemingly random behavior, chaotic systems are completely deterministic. Estimation of parameters of super-chaotic oscillators is one of the most important issues in the field of chaos. Parameter estimation of hyper-chaotic systems can be considered as a multivariate optimization problem. This article aims to present a new method for estimating the parameters of the superchaotic Lorenz system based on the improvement of the whale algorithm with the forbidden search algorithm. The simulation results show that the whale algorithm has a high competitive power compared to similar meta-heuristic algorithms. Estimation of parameters of super-chaotic oscillators is one of the most important issues in the field of chaos. Parameter estimation of hyper-chaotic systems can be considered as a multivariate optimization problem. This article aims to present a new method for estimating the parameters of the superchaotic Lorenz system based on the improvement of the whale algorithm with the forbidden search algorithm. The simulation results show that the whale algorithm has a high competitive power compared to similar meta-heuristic algorithms. Manuscript profile

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