2026-09-15T08:52:17+03:30 http://ijeee.iust.ac.ir/browse.php?mag_id=41&slc_lang=en&sid=1

41-764 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 M. R. Mosavi m_mosavi@iust.ac.ir Z. Shokhmzan z_shokhmzan@elec.iust.ac.ir The Global Positioning System (GPS) signals are very weak signal over wireless channels, so they are vulnerable to in-band interferences. Therefore, even a low-power interference can easily spoof GPS receivers. Among the variety of GPS signal interference, spoofing is considered as the most dangerous intentional interference. The spoofing effects can mitigate with an appropriate strategy in the receiver. In this paper, we use methods of adaptive filter based on Least Mean Squares (LMS) and Normalized Least Mean Squares (NLMS) algorithms in-order to defense against spoofing. The proposed techniques are applied in the acquisition stage of the receiver. The proposed methods have been implemented on real dataset. The results explain that the suggested algorithms significantly decrease spoofing. Also, they improve Position Dilution of Precision (PDOP) parameter. Based on the results, NLMS algorithm has better performance than LMS algorithm. Adaptive Filter GPS LMS Mitigation NLMS PDOP Spoofing 2015 9 01 184 194 http://ijeee.iust.ac.ir/article-1-764-en.pdf 10.22068/IJEEE.11.3.184

41-782 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 M. H Shakoor mhshakoor@gmail.com F. Tajeripour tajeri@shirazu.ac.ir In this paper, a special preprocessing operations (filter) is proposed to decrease the effects of noise of textures. This filter using average of circular neighbor points (Cmean) to reduce noise effect. Comparing this filter with other average filters such as square mean filter and square median filter indicates that it provides more noise reduction and increases the classification accuracy. After applying filter to noisy textures some Local Binary Pattern (LBP) variants are used for feature extraction. The Implementation part for noisy textures of Outex, UIUC and CUReT datasets shows that using proposed filter increases the classification accuracy significantly. Furthermore, a simple and new technique is proposed that increases the speed of c-mean filter noticeably. Circular Mean Filter Local Binary Pattern Noise Robust Texture Classification 2015 9 01 195 203 http://ijeee.iust.ac.ir/article-1-782-en.pdf 10.22068/IJEEE.11.3.195

41-760 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 M. Mohammadian m.mohammadiankebria@gmail.com H. R. Momeni momeni_h@modares.ac.ir M. Tahmasebi tahmasebi@modares.ac.ir Artificially regulating gene expression is an important step in developing new treatment for system-level disease such as cancer. In this paper, we propose a method to regulate gene expression based on sampled-data measurements of gene products concentrations. Inherent noisy behaviour of Gene regulatory networks are modeled with stochastic nonlinear differential equation. To synthesize feedback controller, we formulate sampling process as an impulsive system. By using a new Lyapunov function with discontinuities at sampling times, state feedback gain that guarantees exponential meansquare stability and H&infin performance is derived from LMIs. These LMIs also determine the maximum allowable time between sampling points. A numerical example and a practical application are presented to justify the applicability of the theoretical results Gene Regulatory Networks Impulsive Systems Linear Matrix Inequality Sampled-Data Control 2015 9 01 204 216 http://ijeee.iust.ac.ir/article-1-760-en.pdf 10.22068/IJEEE.11.3.204

41-770 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 S. Ahmadi ahmadi2062@yahoo.com A. Vahedi avahedi@iust.ac.ir In this paper a multiobjective optimal design method of interior permanent magnet synchronous motor ( IPMSM) for traction applications so as to maximize average torque and to minimize torque ripple has been presented. Based on train motion equations and physical properties of train, desired specifications such as steady state speed, rated output power, acceleration time and rated speed of traction motor are related to each other. By considering the same output power, steady state speed, rated voltage, rated current and different acceleration time for a specified train, multiobjective optimal design has been performed by Broyden–Fletcher–Goldfarb–Shanno (BFGS) method and finite element method (FEM) has been chosen as an analysis tool. BFGS method is one of Quasi Newton methods and is counted in classic approaches. Classic optimization methods are appropriate when FEM is applied as an analysis tool and objective function isn’t expressed in closed form in terms of optimization variables. Broyden-Fletcher-Goldfarb-Shanno (BFGS) Method Interior Permanent Magnet Synchronous Motor (IPMSM) Multi-Objective Optimal Design Quasi Newton Methods 2015 9 01 217 221 http://ijeee.iust.ac.ir/article-1-770-en.pdf 10.22068/IJEEE.11.3.217

41-740 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 H. Rajabi Mashhadi h_mashhadi@um.ac.ir M. A. Armin Utilization of wind turbines as economic and green production units, poses new challenges to the power system planners, mainly due to the stochastic nature of the wind, adding a new source of uncertainty to the power system. Different types of distribution and correlation between this random variable and the system load makes conventional method inappropriate for modeling such a correlation. In this paper, the correlation between the wind speed and system load is modeled using Copula, a mathematical tool recently used in the field of the applied science. As the effect of the correlation coefficient is the main concern, the copula modeling technique allows simulating various scenarios with different correlations. The conducted simulations in this paper reveals that the wind speed correlation with the load has significant effect on the system reliability indices, such as expected energy not served (EENS) and loss of load probability (LOLP). Moreover, in this paper the effect of the correlation coefficient on the effective load carrying capability (ELCC) of the wind turbines is analyzed, too. To perform the aforementioned simulations and analyses, the modified RBTS with an additional wind farm is used. Power System Planning Wind Power Effective Load Carrying Capability Copula 2015 9 01 222 230 http://ijeee.iust.ac.ir/article-1-740-en.pdf 10.22068/IJEEE.11.3.222

41-773 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 Y. Damchi damchi.yaser@stu-mail.um.ac.ir J. Sadeh sadeh@um.ac.ir H. Rajabi Mashhadi h_mashhadi@um.ac.ir Most studies in relay coordination have focused solely on coordination of overcurrent relays while distance relays are used as the main protection of transmission lines. Since, simultaneous coordination of these two types of relays can provide a better protection, in this paper, a new approach is proposed for simultaneous coordination of distance and directional overcurrent relays (D&DOCRs). Also, pursued by most of the previously published studies, the settings of D&DOCRs are usually determined based on a main network topology which may result in mis-coordination of relays when changes occur in the network topology. In the proposed method, in order to have a robust coordination, network topology changes are taken into account in the coordination problem. In the new formulation, coordination constraints for different network topologies are added to those of the main topology. A complex nonlinear optimization problem is derived to find the desirable relay settings. Then, the problem is solved using hybridized genetic algorithm (GA) with linear programming (LP) method (HGA). The proposed method is evaluated using the IEEE 14-bus test system. According to the results, a feasible and robust solution is obtained for D&DOCRs coordination while all constraints, which are due to different network topologies, are satisfied. Different Network Topologies Directional Overcurrent Relay Distance Relay Relay Coordination Robust Coordination 2015 9 01 231 240 http://ijeee.iust.ac.ir/article-1-773-en.pdf 10.22068/IJEEE.11.3.231

41-759 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 I. Ehsani Abtin.456@gmail.com A. Akbari Foroud aakbari@semnan.ac.ir A. R. Soofiabadi Soofiali8@gmail.com Locational Marginal Pricing (LMP) is a method for energy pricing in deregulated power systems. Loss and congestion cause different prices for energy at load or generation buses. In this pricing method there is a different between payments of customers and revenue of generators which is called Merchandizing Surplus (MS). Independent System Operator (ISO) receives MS and generally renders it to Transmission Company (Transco). It is rational that the MS be allocated among power market participants fairly instead of granting whole MS to Transco. In this paper a novel method is proposed to allocate MS among market participant according to their role in the congestion of system. In the presented method by decomposing LMP and identifying congestion part of LMP, the part of generators’ revenue and customers’ payments which caused by congestion are calculated. Then MS is allocated among market participants as the payment of customers to be equal to revenue of generators. The proposed method has been tested on five bus test system. Results indicate the effectiveness of the proposed method to allocate MS between power market participants. Merchandizing Surplus Locational Marginal Price Transco Revenue 2015 9 01 241 252 http://ijeee.iust.ac.ir/article-1-759-en.pdf 10.22068/IJEEE.11.3.241

41-746 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 H. yaghobi yaghobi@semnan.ac.ir H. Kafash Haghparast hamid25sss@yahoo.com Synchronous generators are of two type’s salient pole type and round rotor type. The load angle curve of a cylindrical rotor synchronous machine comprises a single sine term only while in salient pole synchronous generators, power-angle characteristic has two terms. The first term is the fundamental component due to field excitation (the same as the cylindrical rotor) and the second term includes the effect of salient pole. In fact, this term is the second harmonic component due to reluctance torque. This paper presents a study on the new design of cylindrical solid rotor synchronous generator. In this new design, rotor of the machine is designed in such a way that the required inductance values are reached to produce reluctance torque, besides electromagnetic torque due to field excitation. In this contribution, a combination of two different ferromagnetic materials is considered in the design of the rotor. In this theory, the tight connection between the different materials is very important from a mechanical point of view. In other words, this new idea and production principal has potential in some areas after some further research and engineering. But this paper is focused on magnetic flux-carrying materials and presents a study of the new design of cylindrical solid rotor synchronous generator (NCG). Then a comparative analysis was made between this new (NCG) and conventional cylindrical solid rotor synchronous generator (CCG) and the effectiveness of the new cylindrical solid rotor from a magnetic point of view is demonstrated. In this paper, mechanical and thermal aspects of design such as vibration did not analyze. Synchronous Generator Two Different Magnetic Materials Cylindrical Rotor Salient Pole Rotor Reluctance Torque Electromagnetic Torque 2015 9 01 253 264 http://ijeee.iust.ac.ir/article-1-746-en.pdf 10.22068/IJEEE.11.3.253

41-712 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 M. Alizadeh Moghadam alizadeh@znu.ac.ir R. Noroozian noroozian@znu.ac.ir S. Jalilzadeh jalilzadeh@znu.ac.ir This paper presents modeling, simulation and control of matrix converter (MC) for variable speed wind turbine (VSWT) system including permanent magnet synchronous generator (PMSG). At a given wind velocity, the power available from a wind turbine is a function of its shaft speed. In order to track maximum power, the MC adjusts the PMSG shaft speed.The proposed control system allowing independent control maximum power point tracking (MPPT) of generator side and regulate reactive power of grid side for the operation of the VSWT system. The MPPT is implemented by a new control system. This control system is based on control of zero d-axis current (ZDC). The ZDC control can be realized by transfer the three-phase stator current in the stationary reference frame into d-and q-axis components in the synchronous reference frame. Also this paper is presented, a novel control strategy to regulate the reactive power supplied by a variable speed wind energy conversion system. This control strategy is based on voltage oriented control (VOC). The simulation results based on Simulink/Matlab software show that the controllers can extract maximum power and regulate reactive power under varying wind velocities. Matrix Converter (MC) Permanent Magnet Synchronous Generator (PMSG) Maximum Power Point Tracking (MPPT) Space Vector Modulation (SVM) Variable Speed Wind Turbine (VSWT) 2015 9 01 265 275 http://ijeee.iust.ac.ir/article-1-712-en.pdf 10.22068/IJEEE.11.3.265

41-769 2026-09-15 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2015 11 3 H. heidarzad moghaddam hale_heydarzad@yahoo.com M. salimi m.salimi@iauardabil.ac.ir Hysteresis current control method is vastly used in PWM inverters because of simplicity in performance, fast control response and good ability in limiting peak current. However, switching frequency in hysteresis current control method with fixed bandwidth has large variation during a cycle and therefore causes non-optimal current ripple generation in output current. One of basic problems in implementing hysteresis current control is its variable switching frequency that causes sound noise and increase in inverter losses and also high frequency current components injection to the source current. In this paper, in addition to the calculation of variable hysteresis bandwidth equation that fixes frequency switching, also other problems can be solved by removing the derivative part. Here, a shunt active filter has been used for removing the current harmonic components generated by non-linear loads. Proposed method is simple to perform and reliable, and also has been simulated in MATHLAB software environment Shunt Active Filter Harmonic Spectrum Hysteresis Bandwidth Simplified Hysteresis Bandwidth Optimized Hysteresis Bandwidth 2015 9 01 276 283 http://ijeee.iust.ac.ir/article-1-769-en.pdf 10.22068/IJEEE.11.3.276