http://mjee.iaumajlesi.ac.ir/index/index.php/ee/issue/feed Majlesi Journal of Electrical Engineering 2018-03-18T13:55:20+00:00 Dr. Mohsen Ashourian editor@mjee.org Open Journal Systems <p>The scope of MJEE is ranging from mathematical foundation to practical engineering design in all areas of electrical engineering. The editorial board is international and original unpublished papers are welcome. The journal is devoted primarily to research papers, but very high quality survey and tutorial papers are also published. There is no publication charges for authors.</p> http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2318 High-order Sliding Mode Control of a Bioreactor Model through Non-Commensurate Fractional Equations 2018-03-18T13:36:44+00:00 Fatemeh Saeedizadeh f.saeedizadeh@yahoo.com Naser Pariz n-pariz@um.ac.ir Seyyed Abed Hosseini Hosseyni@mshdiau.ac.ir <p align="LEFT">&nbsp;<span style="font-size: small;">A higher-order sliding approach to control a bioreactor model is proposed by non-commensurate fractional equations. The model outputs by the help of a controller reached the desired values and track them. According to existing conditions and chattering reduction, a high-order sliding mode has been chosen to design the controller. The purpose of the paper is to choose proper sliding surfaces. Here, for a better conclusion, a comparison has been made between the high-order sliding mode and the standard sliding mode. High-order sliding mode controllers have been taken in accordance with the structure of integer order system. Thus, in order for the system to apply more precise calculations, it should somehow turn to integer order. The sliding surfaces have been selected so appropriately that we can benefit from the structure of integer order controllers for fractional order system. The sliding surface in both controllers has also been the same so as to provide conditions for comparison. Finally, simulation results indicate that the high-order sliding mode controller has a great impact on chattering reduction. </span></p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2500 Optimal Control of Two-Wheeled Self-Balancing Robot with Interval Uncertainties Using Chebyshev Inclusion Method 2018-03-18T12:57:55+00:00 Navid Razmjooy xnavid@gmail.com Mehdi Ramezani ramezani@aut.ac.ir Since two-wheeled and self-balancing robot has a complicated and non-linear structure, its model has some uncertainties. These uncertainties cause that the system has an incorrect solution if while using the classic methods for controlling of it. In this paper, a new method based on interval analysis is proposed for modeling the optimal control of the two-wheeled and self-balancing robot with interval uncertain parameters which requires only lower and upper bounds of uncertain parameters, with no needing to know about probability distributions. Because the system has uncertainties in it, controllability is first analyzed based on interval arithmetic. Afterwards, LQR based method based on Pontryagin principle is utilized to solve the problem. Finally, by solving the interval Ricatti equations, the confidence interval for feedback controller has been achieved.  Final results are compared with Monte Carlo method and the results demonstrate the effectiveness of the proposed method. 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2447 Short-term Scheduling of Restructured Distribution Networks with Demand Response using Symbiotic Organism Search (SOS) Algorithm 2018-03-18T13:07:46+00:00 Mehdi Tabasi Mehdi.tabasi@gmail.com Pouyan Asgharian pouyan.asgharian@znu.ac.ir <p class="MJEE-Abstract">Recently, power system restructuring, demand response (DR) program and using of distributed generation (DG) are important issues to enhance reliability, power flow continuity and power quality for costumers. In this paper, scheduling of distributed networks with DR program for a 24-hours optimization problem is modelled. The DR program is based on load side participation and in order to solve this optimization problem, a new algorithm called Symbiotic Organism Search (SOS) has been used. Objective functions are system losses and operation costs reduction. After exact definition of the problem, objective functions and constraints, proposed method for short-term scheduling is simulated on a 33-bus standard network with MATLAB software for different scenarios. Simulation results show that adoption of demand response programs with proposed method have desirable performance to reduce losses and costs.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2408 Enhancing Low Frequency Oscillations Damping of a Power System by a TCSC Controlled with Sliding Mode Method 2018-03-18T13:06:36+00:00 Hossein Amootaghi Amootaghi@iaukhsh.ac.ir Shahrokh Shojaeian shojaeian@iaukhsh.ac.ir Ehsan Salleala Naeini eshan.salleala@iaukhsh.ac.ir <p>Sliding mode control is an efficient and robust control method widely used in nonlinear systems. Power systems are one of the largest nonlinear dynamic systems which their transient stability analyses have a lot of importance. In this paper, sliding mode control is applied for improving the low frequency oscillations damping of a single machine connected to an infinite bus. The performance of the system is analyzed in normal mode operation, post-fault state, after operation of relays (and opening the breakers in the both ends of the faulty line), and reclosing mechanism which returns the line to service. Here, TCSC is employed as an oscillation damper. TCSC can be considered as a controllable impedance determined by the sliding mode control. In addition, a dynamical observer is proposed for the sliding mode controller. Simulation results demonstrate that, the performance of the power system in damping the low frequency oscillations is improved significantly.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2387 Experiencing Numeric Relay, Fault Locator and a Novel Approach of Fault Location in Electrical Transmission and Distribution System using Smart Meter 2018-03-18T13:05:18+00:00 Geeta Velhal geeta.mandhare@yahoo.com Avani Pujara avanitanna@gmail.com V Muralidhara v.muralidhara.1952@gmail.com Shashikant Bakre smbakre@hotmail.com Vaishali Velhal manjireenazare@rediffmail.com <p class="Abstract">In the modern electrical grid, accuracy and speed of fault clearance are the major challenges which need to be addressed. This paper covers a case study of fault location techniques in Electrical Transmission and Distribution&nbsp; network, using Numeric Relay and Offline Fault Locator. Healthiness of electrical transmission line is ensured using Line Signature Analyzer. Comparative study of online and offline fault location in&nbsp; electrical transmission and distribution network has been carried out &nbsp;and the inferences are drawn. Frequency of occurrence of Single Line to Ground fault is maximum (about 75%) among various types of faults. Data at 220 kV and 132 kV substations has been collected and analyzed, keeping focus on Single Line to Ground &nbsp;Fault.Architecture of Substation Automation system (SAS) using single communication technology based on IEC 61850-8 and IEC 61850-9 is explained. Proposed architecture consisting of numeric meter with JAVA Compilation Unit (JCU) and Ethernet switch standardized as per IEC 61850 is demonstrated. The Java source code to send indications to output port of Numeric Meter is included.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2350 A Novel High Voltage Gain and Low Voltage Stress DC-DC Boost Converter for Photovoltaic Applications 2018-03-18T13:04:03+00:00 Mehdi Tabasi Mehdi.tabasi@gmail.com Alireza Bakhshinejad alireza.bakhshinejad@gmail.com <p>Photovoltaic (PV) panels are rely on environmental condition such as irradiation or temperature so, they are required to an interface boost converter. Non-isolated DC-DC boost converters have lower volume, lower costs and lower power dissipation compare to isolated converters. Therefore, a non-isolated boost converter is used in this paper. The proposed structure is controlled by Pulsed Width Modulation (PWM) technique to increase input voltage level. Main advantages of the proposed converter include low input current ripples, low voltage stress on semiconductor switches, high efficiency and low conduction losses. Moreover, maximum power is achieved from PV panels. Based on mentioned benefits along with simulation and experimental results, this boost converter is desired for PV applications.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2335 Negative Refraction, Subwavelength Lensing Effect and Total Mirror with a Photonic Crystal Structure 2018-03-18T13:55:20+00:00 Zohreh Dorrani zdorrani@yahoo.com <p><span style="font-family: Times New Roman; font-size: small;">We have presented the investigation on the slab of photonic crystals that was made of a honeycomb lattice of silicon embedded in free space. For the simulation of this structure was used the two-dimensional finite-difference time-domain (FDTD) method. This arrangement was shown that with suitable choice of frequency can have negative refraction with an effect metamedium with</span> <span style="font-family: Times New Roman; font-size: small;">. In this conditions, in TE polarization can be used total mirror and in TM polarization can be used superlens. In a certain frequency, this type of photonic crystal structure acts as left handed martial that they were named metamaterials. A wide range effects were studied by this structure. For be shown these unusual phenomena, we analyses the contour map and solid model of electric field and magnetic field for a photonic crystals structure.&nbsp;</span><span style="font-size: small;"><span style="font-family: Times New Roman;">&nbsp;This structure has negative refraction of light, subwavelength lensing effect, 100% reflector. These feathers there are in metamaterials that also in photonic crystals can be shown.&nbsp;</span></span><span style="font-family: Times New Roman; font-size: small;">We have presented the investigation on the slab of photonic crystals that was made of a honeycomb lattice of silicon embedded in free space. For the simulation of this structure was used the two-dimensional finite-difference time-domain (FDTD) method. This arrangement was shown that with suitable choice of frequency can have negative refraction with an effect metamedium with</span> <span style="font-family: Times New Roman; font-size: small;">. In this conditions, in TE polarization can be used total mirror and in TM polarization can be used superlens. In a certain frequency, this type of photonic crystal structure acts as left handed martial that they were named metamaterials. A wide range effects were studied by this structure. For be shown these unusual phenomena, we analyses the contour map and solid model of electric field and magnetic field for a photonic crystals structure.&nbsp;</span><span style="font-size: small;"><span style="font-family: Times New Roman;">&nbsp;This structure has negative refraction of light, subwavelength lensing effect, 100% reflector. These feathers there are in metamaterials that also in photonic crystals can be shown.</span></span></p> <p><span style="font-family: Times New Roman; font-size: small;">&nbsp;</span></p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2231 Performance Optimization of Broadwell-Y Shaped Transistor Using Artificial Neural Network and Moth-Flame Optimization Technique 2018-03-18T13:02:07+00:00 Navneet Kaur navneetkaur@gndec.ac.in Munish Rattan rattanmunish@gndec.ac.in Sandeep Singh Gill ssg@gndec.ac.in <p>FinFETs are the emerging 3D-transistor structures due to strong electrostatic control of active channel by gate from more than one side which was not possible in conventional transistor. FinFET structures with rectangular and trapezoidal shape have been excessively analyzed in literature. In this work, FinFET with Broadwell-Y shape proposed by Intel, has been designed and simulated in Technology Computer Aided Design (TCAD). The performance of the designed device was optimized using Moth Flame Optimization (MFO) after the network was trained through Artificial Neural Network (ANN). Results obtained from MATLAB were in close agreement with those obtained from TCAD simulations. Output parameters like leakage current (<em>I<sub>OFF</sub></em>) of 2.407e-12, On-Off current ratio (<em>I<sub>ON</sub>/I<sub>OFF</sub></em>) of 4.5e06, Subthreshold Swing (<em>SS</em>) of 65.4mV/dec and Drain Induced Barrier Lowering (<em>DIBL</em>) of 37.9mV/V were obtained after optimization. Short channel effects are improved for 20nm gate length as SS is close to ideal value 60mV/dec and DIBL is below 100mV/V which makes this designed structure a good option for nanoscale applications.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2292 Improvement of Electronic Correspondence of Inter-enterprise with Service Component of ECES 2018-03-18T13:01:13+00:00 Mohammad Hadi Emtehani ms.emtehani@iauyazd.ac.ir Sima Emadi au_emadi@yahoo.com <p>by development of using software of Enterprise Content Management (ECM), necessity of improving electronic Correspondence of inter-enterprise is felt more than before in order to enterprise cooperation. Despite existence of some bases for enterprise content management such as ECE protocol still there are some problems such as user intervention, delay, consumption of paper, parallelism, impossibility of tracking Correspondence and security problems and possibility of enterprise cooperation is not provided well. Using architecture of service component which has advantages of service-oriented approach such as simplicity, reusability, interoperability and flexibility produces an optimal solution for interoperability between systems and heterogeneous substrates by increasing the agility of integration of Web services meanwhile it doesn’t have overload due to services and minimizes costs of development and maintenance. Component service of ECES which is implemented by using architecture of service component supports ECE standards and makes doing electronic Correspondence possible between enterprises of Iran.&nbsp;&nbsp;</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2495 Dynamic Voltage Stability Evaluation of Power Systems Considering Industrial Electrical Loads 2018-03-18T13:00:18+00:00 Mohammad reza Ansari mr.ansari.sh@gmail.com <p class="MJEE-Abstract">&nbsp; &nbsp;This paper presents a simulation of the dynamic voltage stability in power system. In application of modern power system, dynamic assessment of voltage stability is known as basic concept. In order to study dynamic voltage stability in a power system, different dynamic boundaries are defined such as, Hopf bifurcation (HB) boundary. HB point is an oscillatory boundary in power system. For recognition of the bifurcations, it is unavoidable to study the eigenvalues of power system. In spite of this, determination of these eigenvalues need to dynamic Jacobian matrix of power system and modal analysis that is very time consuming and complex in large systems. Also, different industrial loads (static and dynamic) e.g. induction motors can effect on dynamic voltage stability boundaries. In this paper, we proposed a solution method based on analysis the eigenvalues of reduced Jacobian matrix and time domain simulation for assessment of dynamic voltage stability. In addition, effects of industrial electrical loads on the small disturbance voltage stability are evaluated by the proposed method. To show the effectiveness of the proposed solution method, it is tested on IEEE 14 bus and New England test systems.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2427 Strengthened of AES Encryption Algorithms within New Logic Topology 2018-03-18T12:56:24+00:00 Vahid Rashtchi rashtchi@znu.ac.ir Seyyed Hamidreza Mousavi hamidreza@znu.ac.ir <p>Side-channel attacks are considered to be the most important problems of modern digital security systems. Today, Differential Power Attack (DPA) is one of the most powerful tools for attacking hardware encryption algorithms in order to discover the correct key of the system. In this work, a new scheme based on randomizing power consumption of a fixed-operation logic gate is proposed. The goal of this method is enhancing the immunity of AES algorithm against DPA. Having a novel topology to randomize the power consumption of each Exclusive-NOR gate, the proposed circuit causes random changes in the overall power consumption of the steps of the algorithm; thus, the correlation between the instantaneous power consumption and the correct key is decreased and the immunity of the AES implementations which the key is injected into their process through Exclusive-NOR gates is extremely increased. The proposed method can be used as a general hardening method in the majority of cryptographic algorithms. The results of theoretical analysis and simulations in 90-nm technology demonstrate the capability of the proposed circuits to strengthen AES against DPA. The CMOS area and power consumption overhead is less than 1%.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2239 Ultra-High Capacity DWDM System using Different Intensity Modulation Formats 2018-03-18T12:59:14+00:00 Abbas Hamooleh Alipoor alipoor.ab@fe.lu.ac.ir Ali Mir mir.a@lu.ac.ir Akram Sheikhi sheikhi.a@lu.ac.ir <p>Dense Wavelength Division Multiplexing (DWDM) communication system is an all optical network technology that transmit information by sending light pulse through a single mode fiber. Proposed technology can increase the capacity and bandwidth of optical network. DWDM system consists of different passive and active components such as transponders, fibers, passive optical filters, and an optical amplifier. In this paper an ultra-high capacity 64-channel DWDM system with intensity modulations such as two methods of duo-binary modulation at different bit rates of 10, 20 and 40 Gbps for a coverage distance of 1500 km and more is designed and simulated. Also, the transmission parameters of proposed system is optimized to achieve the Max quality factor. Results shows for proposed system with ultra-high capacity, the first method of duo-binary modulation has good performance than other modulations such as second duo-binary method and conventional modulation formats that used in optical network. The performance of the presented system is evaluated in the final arrangement by means of Bit Error Rate (BER) and Optical Signal-to-Noise Ratio (OSNR) measurements.</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2346 Low Power Delay Product 8-bit ALU Design using Decoder and Data Selector 2018-03-18T12:54:30+00:00 Nagarjuna Telagam nagarjuna473@gmail.com Nehru Kandasamy nnehruk@gmail.com <p>The semiconductor circuits dissipate energy in the form of binary digits. This dissipation of energy is in the form of power consumption. ALU is complex circuit and is one of many components within CPU. It performs mathematical and bitwise operations. This paper proposes a new low power 8 bit ALU digital circuit for nano scale regions. The proposed ALU has two 4x1 data selectors, 2x4 decoder and an adder circuit as sub modules. The output of 2x4 decoder is connected to 3 input NAND, AND, OR, XOR gates.&nbsp; With the help of selection lines of multiplexer the conventional operations of ALU such as logical operations are performed. This proposed ALU caters the need of digital signal processing tools. Present ALU structure is simulated in Linux Computer using Cadence Virtuoso software and implemented in 180mm technology. The proposed ALU has delay of 386.0ps and average power of 677.2uW. The power delay product shows 65.58 % improvement when compared to the conventional 8-bit ALU design</p> 2018-01-01T00:00:00+00:00 ##submission.copyrightStatement## http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/2653 Estimation of Re-hospitalization Risk of Diabetic Patients based on Radial Base Function (RBF) Neural Network Method Combined with Colonial Competition Optimization Algorithm 2018-03-18T13:13:06+00:00 Mansoureh Khojandi jazi mansourehkhojandi89@yahoo.com Narges Habibi narges.habibi@gmail.com Majid Harouni majid.harouni@gmail.com <p>Diabetes is the most costly gland disease in the world. Given the high rates of diabetic people, the necessity of reducing the costs of early re-hospitalization and increasing re-admissions within 30 days after discharge have drawn the attention of researchers and other health sector authorities to find ways to reduce potential and preventable hospital re-admissions. The objective of this paper is to estimate the risk of re-hospitalization of diabetic patients. In order to achieve this goal, the data were first pre-processed, and then, radial base function neural network combined with colonial competition optimization algorithm was used to estimate the risk of re-hospitalization of diabetic patients. Moreover, this risk was estimated using <a href="http://bme2.aut.ac.ir/~towhidkhah/MI/seminar87/AI.PPT">back propagation</a> neural network algorithm and the radial base function neural network algorithm. The accuracy of the proposed method is 99.91. This method shows higher performance compared to radial base function neural network method and back propagation neural network without feature selection.</p> 2018-02-28T00:00:00+00:00 ##submission.copyrightStatement##