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Saher Albatran
Department of Electrical Engineering, Faculty of Engineering, Jordan University of Science and Technology, Irbid, Jordan

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Original paper
Published: 19 June 2021 in Energy Systems
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This paper proposes an effective way to eliminate the reactive power-sharing errors that is compatible with droop control. The virtual synchronous generator technique was employed to estimate and compensate reactive power-sharing error. The basic idea is to inject a disturbance at active power loop for all parallel inverters from the central controller simultaneously. At the same time, the resultant signal from active power loop is processed through an integral term to fix reactive power errors. This method, in contrary to the virtual impedance method, doesn't depend on the microgrid parameters or configurations. Consequently, it supports the "plug-and-play" trait of modern microgrids. Moreover, stability and fast response are guaranteed using the proposed strategy. To ensure the applicability, comparisons with state of the art research are made in terms of six common scenarios. The comparison study considers the time of compensation, impact of active power change during compensation, frequency robustness, the effect of feeder impedances mismatch, the effect of local load, and the impact of having inverters with different capacities. Ultimately, the standard deviation, the approximation error, and the range are the performance indices used to have a fair comparison.

ACS Style

Saher Albatran; Hamzeh Al-Shorman. Reactive power correction using virtual synchronous generator technique for droop controlled voltage source inverters in islanded microgrid. Energy Systems 2021, 1 -27.

AMA Style

Saher Albatran, Hamzeh Al-Shorman. Reactive power correction using virtual synchronous generator technique for droop controlled voltage source inverters in islanded microgrid. Energy Systems. 2021; ():1-27.

Chicago/Turabian Style

Saher Albatran; Hamzeh Al-Shorman. 2021. "Reactive power correction using virtual synchronous generator technique for droop controlled voltage source inverters in islanded microgrid." Energy Systems , no. : 1-27.

Journal article
Published: 18 June 2021 in IEEE Access
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Model order reduction simplifies the understanding of a given system and minimizes the simulation studies computational burden. A new order reduction method that depends on a predetermined normalized error of the transient performance indices is introduced. Ten percent and five percent error criteria in modeling and analyzing the transient performance of the third-order system are considered to have an accurate study. All sufficient special conditions and general rules required to achieve precise order reduction are determined. This work focuses on underdamped third-order systems without zeros. Third-order systems with three real poles are also analyzed for the study completeness. The relationships between the characteristic equation parameters are identified and the range in which the reduction is accurately valid is clearly specified. Each approximation or order reduction is studied separately in terms of the transient response characteristics: rise time, settling time and percentage overshoot. The comparison shows the effectiveness of the proposed method.

ACS Style

Saher Albatran; Ammar Alatoum; Abdel Rahman Al Khalaileh. Informative Order-Reduction of Underdamped Third-Order Systems. IEEE Access 2021, 9, 1 -1.

AMA Style

Saher Albatran, Ammar Alatoum, Abdel Rahman Al Khalaileh. Informative Order-Reduction of Underdamped Third-Order Systems. IEEE Access. 2021; 9 ():1-1.

Chicago/Turabian Style

Saher Albatran; Ammar Alatoum; Abdel Rahman Al Khalaileh. 2021. "Informative Order-Reduction of Underdamped Third-Order Systems." IEEE Access 9, no. : 1-1.

Journal article
Published: 28 September 2020 in IEEE Access
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The complexity of achieving optimal power flow in the presence of renewable resources decreases the accuracy and optimality levels of the power system due to the associated intermittency and uncertainty. The increased challenge of large-scale deployment of wind energy necessitates the proper modeling of wind impact on power system security and reliability levels. This article discusses a new reliable power flow optimization tool that accounts for wind power availability and uncertainty. An accurate wind forecast model is created to maintain power system security considering wind power variability. The error of the forecasting phase is included in the proposed model to accurately predict the available wind power. In this work, the scattered wind data is converted into informative frequency distribution considering the effect of averaging around integers, halves, and quarters. The proposed method maximizes the utilization level of wind energy without deteriorating the system security. The accuracy of the new proposed work is presented by comparing its results with other models discussed in the literature. A complete and integrated formulation of the objective function has been accomplished. The cost function includes transmission losses, generation operating costs, generation gas emissions, and valve-point effects. Reliable and efficient optimization algorithms are adopted to minimize the established cost function of the system ⎯namely, teaching-learning-based optimization and symbiotic organisms search algorithms. The effectiveness of the proposed approach is validated using the IEEE 39-bus system.

ACS Style

Saher Albatran; Salman Harasis; Muwaffaq I Alomoush; Yazan Alsmadi; Mohammad Awawdeh. Realistic Optimal Power Flow of a Wind-Connected Power System With Enhanced Wind Speed Model. IEEE Access 2020, 8, 176973 -176985.

AMA Style

Saher Albatran, Salman Harasis, Muwaffaq I Alomoush, Yazan Alsmadi, Mohammad Awawdeh. Realistic Optimal Power Flow of a Wind-Connected Power System With Enhanced Wind Speed Model. IEEE Access. 2020; 8 (99):176973-176985.

Chicago/Turabian Style

Saher Albatran; Salman Harasis; Muwaffaq I Alomoush; Yazan Alsmadi; Mohammad Awawdeh. 2020. "Realistic Optimal Power Flow of a Wind-Connected Power System With Enhanced Wind Speed Model." IEEE Access 8, no. 99: 176973-176985.

Journal article
Published: 11 June 2020 in IEEE Transactions on Power Electronics
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Voltage source inverters (VSIs) are widely utilized in motor drives and renewable energy integration. Pulsewidth modulation (PWM)-VSIs are employed to generate a controlled alternating current (AC) waveform from a finite direct current (DC) link voltage. When the amplitude of the reference signal exceeds its linearity limit, which is ${V_{dc/2}}$ for sinusoidal PWM (SPWM), a PWM-VSI operates in the overmodulation region which causes a significant reduction in the quality of the output AC voltage and the DC bus utilization (DBU). In this paper, first, two adaptive optimal third harmonic injection (AOTHI)-PWM schemes are proposed to minimize voltage total harmonic distortion (THD) (AOTHI-THDv) and maximize DBU (AOTHI-DBU). To validate the effectiveness of the proposed schemes, the resulting THD and DBU values are compared with existing continuous/discontinuous PWM scheme results. Then, to meet the practical implementation in microcontrollers, one generalized AOTHI-PWM is formulated to adaptively generate an optimal injection level using two proposed mathematical models. Aside from the simulation evaluations, the performances of the proposed schemes are also validated through experimental comparisons, which show a superiority over the other PWM schemes

ACS Style

Saher Albatran; Ahmad S. Allabadi; Abdel Rahman Al Khalaileh; Yong Fu. Improving the Performance of a Two-Level Voltage Source Inverter in the Overmodulation Region Using Adaptive Optimal Third Harmonic Injection Pulsewidth Modulation Schemes. IEEE Transactions on Power Electronics 2020, 36, 1092 -1103.

AMA Style

Saher Albatran, Ahmad S. Allabadi, Abdel Rahman Al Khalaileh, Yong Fu. Improving the Performance of a Two-Level Voltage Source Inverter in the Overmodulation Region Using Adaptive Optimal Third Harmonic Injection Pulsewidth Modulation Schemes. IEEE Transactions on Power Electronics. 2020; 36 (1):1092-1103.

Chicago/Turabian Style

Saher Albatran; Ahmad S. Allabadi; Abdel Rahman Al Khalaileh; Yong Fu. 2020. "Improving the Performance of a Two-Level Voltage Source Inverter in the Overmodulation Region Using Adaptive Optimal Third Harmonic Injection Pulsewidth Modulation Schemes." IEEE Transactions on Power Electronics 36, no. 1: 1092-1103.

Article
Published: 28 November 2019 in International Journal of Control, Automation and Systems
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This study aims to propose generalized formulas in an explicit form to optimally tune the gains of the proportional-integral (PI) and proportional-integral-derivative (PID) controllers of an underdamped second-order system. Unlike other methods used in literature, the controller gains are tuned explicitly based on the known system parameters of the second-order system, namely: the damping ratio and the natural frequency. The proposed accurate and one-step formulas do not need any further effort to effectively control any given second-order system while keeping the desired performance indices within near-optimal specifications. The proposed work relies on a restricted deadbeat response criterion and cascaded surface curve fitting procedure to end by near-optimal controller gains tuning formulas. A particle swarm optimization (PSO) method is employed to optimize the primary tuned gains for wide-range of system frequency. The proposed formulas are tested and simulated to demonstrate their effectiveness with comparisons with the closest common related gains tuning methods. Based on the comprehensive analysis, the proposed work ensures 2% maximum percentage overshoot when the proposed formulas are adopted to tune the gains of the PID controllers. Different comparisons are carried out to show the effectiveness of the proposed work.

ACS Style

Saher Albatran; Issam A. Smadi; Hussein A. Bataineh. Generalized Optimal and Explicit PI/PID Tuning Formulas for Underdamped Second-order Systems. International Journal of Control, Automation and Systems 2019, 18, 1023 -1032.

AMA Style

Saher Albatran, Issam A. Smadi, Hussein A. Bataineh. Generalized Optimal and Explicit PI/PID Tuning Formulas for Underdamped Second-order Systems. International Journal of Control, Automation and Systems. 2019; 18 (4):1023-1032.

Chicago/Turabian Style

Saher Albatran; Issam A. Smadi; Hussein A. Bataineh. 2019. "Generalized Optimal and Explicit PI/PID Tuning Formulas for Underdamped Second-order Systems." International Journal of Control, Automation and Systems 18, no. 4: 1023-1032.

Journal article
Published: 19 November 2019 in IEEE Transactions on Power Electronics
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ACS Style

Ahmed M. Koran; Saher Albatran; Jih-Sheng Lai. Analytical Factorized Model for Stability Analysis and Optimization of Shunt RC Damped LCL Filter for Grid-Connected Voltage Source Inverters. IEEE Transactions on Power Electronics 2019, 35, 6830 -6841.

AMA Style

Ahmed M. Koran, Saher Albatran, Jih-Sheng Lai. Analytical Factorized Model for Stability Analysis and Optimization of Shunt RC Damped LCL Filter for Grid-Connected Voltage Source Inverters. IEEE Transactions on Power Electronics. 2019; 35 (7):6830-6841.

Chicago/Turabian Style

Ahmed M. Koran; Saher Albatran; Jih-Sheng Lai. 2019. "Analytical Factorized Model for Stability Analysis and Optimization of Shunt RC Damped LCL Filter for Grid-Connected Voltage Source Inverters." IEEE Transactions on Power Electronics 35, no. 7: 6830-6841.

Journal article
Published: 07 June 2019 in Simulation Modelling Practice and Theory
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This paper presents a method to improve the power quality of a class of shared inverter topologies utilizing optimal sorting and the offsetting pulsewidth modulation (PWM) method. For the (3n+3)-switch converter topologies, a PWM procedure with two degrees of freedom is proposed to enhance the quality at the power side of the shared loads without adding more passive elements. Moreover, the two degrees of freedom are analyzed and optimized to improve the power quality of the output current of the shared loads. The optimization is achieved using particle swarm optimization (PSO) method in which three objective functions are formulated, each of which impacts the power quality at the shared loads side. The objective functions are: the total harmonic distortion (THD), the scaled total harmonic distortion (STHD), and the summation of the eleventh order of harmonics (SFEH) of the current of the shared loads. A case study that compares the PSO results with the conventional results is investigated to highlight the effectiveness of the proposed procedure. Furthermore, a test bed is built and the proposed procedure is experimentally investigated, verified, and compared to the simulation.

ACS Style

Issam A. Smadi; Saher Albatran; Mohammad A. Alsyouf. Power quality improvement of a class of reduced device count inverter. Simulation Modelling Practice and Theory 2019, 96, 101939 .

AMA Style

Issam A. Smadi, Saher Albatran, Mohammad A. Alsyouf. Power quality improvement of a class of reduced device count inverter. Simulation Modelling Practice and Theory. 2019; 96 ():101939.

Chicago/Turabian Style

Issam A. Smadi; Saher Albatran; Mohammad A. Alsyouf. 2019. "Power quality improvement of a class of reduced device count inverter." Simulation Modelling Practice and Theory 96, no. : 101939.

Original paper
Published: 26 October 2018 in Energy Systems
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This paper presents analysis aspects for photovoltaic (PV) cells. Starting from reducing the number of needed I–V points to extract the parameters of the double diode PV model based on two different stochastic algorithms. Then, the identified model is analyzed to find informative and detailed sensitivities of the main outputs of the PV cell to cell temperature and solar irradiance. These formulations can work as a master algorithm to check, update and accelerate the maximum power point tracking (MPPT) algorithms. Besides that, model uncertainties and variations in the parameters are considered to represent a new accurate MPPT algorithm in one straightforward step. An improved online adaptation to the fractional open circuit voltage and fractional short circuit current MPPT algorithms are presented as examples of the proposed one-step online MPPT algorithm. As a result, different sensorless estimators of the temperature and the irradiance are presented to replace the actual weather sensors with high accuracy. The proposed work is done for four PV cells to show the importance of this comprehensive analysis. Experimental work is carried out using a 100W (PS-M36s) solar panel and Altera DE2-115 field programmable gate array development board in the-loop verification environment to illustrate the effectiveness of the proposed procedure.

ACS Style

Saher Albatran; Omar Assad. Online adaptive master maximum power point tracking algorithm and sensorless weather estimation. Energy Systems 2018, 11, 73 -93.

AMA Style

Saher Albatran, Omar Assad. Online adaptive master maximum power point tracking algorithm and sensorless weather estimation. Energy Systems. 2018; 11 (1):73-93.

Chicago/Turabian Style

Saher Albatran; Omar Assad. 2018. "Online adaptive master maximum power point tracking algorithm and sensorless weather estimation." Energy Systems 11, no. 1: 73-93.

Original paper
Published: 26 July 2018 in Electrical Engineering
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In this paper, a new and efficient global optimization method known as teaching–learning-based optimization is adopted to optimally design the parameters of a passive RC-damped LCL filter for grid-connected voltage source inverters. The novel proposed objective function of the optimization algorithm is to minimize the values of inductors and capacitors. The proposed design improves inverter efficiency and minimizes filter stored energy at a predefined operating and switching frequencies. Moreover, the proposed design procedure may reduce the complexity of the passive RC-damped LCL filter by removing one inductor or one capacitor. The optimal design procedure is built based on an accurate mathematical model and description of the filter topology. A detailed comparison between the results of the proposed work and related work in the literature is thoroughly discussed. The optimized filter is designed, built, and validated analytically and experimentally for verification based on a hardware prototype.

ACS Style

Saher Albatran; Ahmed Koran; Issam A. Smadi; Hamzeh J. Ahmad. Optimal design of passive RC-damped LCL filter for grid-connected voltage source inverters. Electrical Engineering 2018, 100, 2499 -2508.

AMA Style

Saher Albatran, Ahmed Koran, Issam A. Smadi, Hamzeh J. Ahmad. Optimal design of passive RC-damped LCL filter for grid-connected voltage source inverters. Electrical Engineering. 2018; 100 (4):2499-2508.

Chicago/Turabian Style

Saher Albatran; Ahmed Koran; Issam A. Smadi; Hamzeh J. Ahmad. 2018. "Optimal design of passive RC-damped LCL filter for grid-connected voltage source inverters." Electrical Engineering 100, no. 4: 2499-2508.

Journal article
Published: 27 June 2018 in Electronics
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This paper presents an optimal control method for a compact reduced switch count AC/AC converter in an AC microgrid. The AC/AC converter is adopted to interconnect dual three-phase renewable energy sources (RESs) and a three-phase permanent magnet synchronous motor (PMSM) to the grid to form an example of a mixed grid-feeding-drive system. For the adopted converter, a generalized pulse width modulation (PWM) scheme employing the third harmonic injection and a control method are proposed. Moreover, to achieve reduced dc link voltage ripple, good reference tracking and disturbance rejection, the gains of the controllers are optimized by minimizing a weighted sum of different objective functions. Each objective function represents a specific aspect to be minimized and the optimization problem is solved employing particle swarm optimization (PSO) method, while ensuring that the total harmonic distortion (THD) of the current at the points of common coupling (PCC) are less than 5%. For this mixed grid-feeding-drive system, simulation results under fast transient are provided to demonstrate the applicability of the adopted converter in the AC microgrid, the effectiveness of the proposed PWM, and the proposed optimal control method.

ACS Style

Issam A. Smadi; Saher Albatran; Mohammad A. Alsyouf. Optimal Control of a Compact Converter in an AC Microgrid. Electronics 2018, 7, 102 .

AMA Style

Issam A. Smadi, Saher Albatran, Mohammad A. Alsyouf. Optimal Control of a Compact Converter in an AC Microgrid. Electronics. 2018; 7 (7):102.

Chicago/Turabian Style

Issam A. Smadi; Saher Albatran; Mohammad A. Alsyouf. 2018. "Optimal Control of a Compact Converter in an AC Microgrid." Electronics 7, no. 7: 102.

Journal article
Published: 01 April 2018 in International Journal of Electrical and Computer Engineering (IJECE)
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Many reduced-switch-count (RSC) inverter topologies have been proposed in the literature. As the number of switches required to produce a set of voltages in RSC inverters are less than that in conventional inverter, as a result utilizing RSC inverters in a certain system reduces its size and cost. In this paper, a novel RSC shared inverter topology consisting of fifteen switches and capable of driving four three-phase AC-loads independently is proposed and experimentally verified. A carrier-based pulse width modulation (PWM) technique that employs the zero-sequence-signal injection principle is developed to drive the proposed inverter along with adequate DC voltage bus utilization between the shared loads for common frequency (CF) as well as different frequency (DF) modes. The structure and the principle of operation of the proposed inverter are introduced and intensively verified using simulation and field-programmable-gate-array (FPGA)-in-the-loop simulation under linear and nonlinear loads. Then, Inverter prototype was built and the proposed inverter has been verified experimentally. The experimental results verify the applicability of the proposed inverter and the employed PWM.

ACS Style

Saher Albatran; Issam A. Smadi; Mohammad A. Alsyouf. Experimental Validation of Shared Inverter Topology to Drive Multi AC-Loads. International Journal of Electrical and Computer Engineering (IJECE) 2018, 8, 793 -805.

AMA Style

Saher Albatran, Issam A. Smadi, Mohammad A. Alsyouf. Experimental Validation of Shared Inverter Topology to Drive Multi AC-Loads. International Journal of Electrical and Computer Engineering (IJECE). 2018; 8 (2):793-805.

Chicago/Turabian Style

Saher Albatran; Issam A. Smadi; Mohammad A. Alsyouf. 2018. "Experimental Validation of Shared Inverter Topology to Drive Multi AC-Loads." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 2: 793-805.

Journal article
Published: 01 April 2018 in International Journal of Electrical and Computer Engineering (IJECE)
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Recently, the Gravitational-Search Algorithm (GSA) has been presented as a promising physics-inspired stochastic global optimization technique. It takes its derivation and features from laws of gravitation. This paper applies the GSA to design optimal controllers of a nonlinear system consisting of a doubly-fed induction generator (DFIG) driven by a wind turbine. Both the active and the reactive power are controlled and processed through a back-to-back converter. The active power control loop consists of two cascaded proportional integral (PI) controllers. Another PI controller is used to set the q-component of the rotor voltage by compensating the generated reactive power. The GSA is used to simultaneously tune the parameters of the three PI controllers. A time-weighted absolute error (ITAE) is used in the objective function to stabilize the system and increase its damping when subjected to different disturbances. Simulation results will demonstrate that the optimal GSA-based coordinated controllers can efficiently damp system oscillations under severe disturbances. Moreover, simulation results will show that the designed optimal controllers obtained using the GSA perform better than the optimal controllers obtained using two commonly used global optimization techniques, which are the Genetic Algorithm (GA) and Particle Swarm Optimization (PSO).

ACS Style

Saher Albatran; Muwaffaq I. Alomoush; Ahmed M. Koran. Gravitational-Search Algorithm for Optimal Controllers Design of Doubly-fed Induction Generator. International Journal of Electrical and Computer Engineering (IJECE) 2018, 8, 780 -792.

AMA Style

Saher Albatran, Muwaffaq I. Alomoush, Ahmed M. Koran. Gravitational-Search Algorithm for Optimal Controllers Design of Doubly-fed Induction Generator. International Journal of Electrical and Computer Engineering (IJECE). 2018; 8 (2):780-792.

Chicago/Turabian Style

Saher Albatran; Muwaffaq I. Alomoush; Ahmed M. Koran. 2018. "Gravitational-Search Algorithm for Optimal Controllers Design of Doubly-fed Induction Generator." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 2: 780-792.

Journal article
Published: 09 February 2018 in Energies
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The performance optimization of the two-level, three-phase, grid-feeding, voltage-source inverter (VSI) is studied in this paper, which adopts an online adaptive switching frequency algorithm (OASF). A new degree of freedom has been added to the employed OASF algorithm for optimal selection of the weighting factor and overall system optimization design. Toward that end, a full mathematical formulation, including the impact of the coupling inductor and the controller response time, is presented. At first, the weighting factor is selected to favor the switching losses, and the controller gains are optimized by minimizing the integral time-weighted absolute error (ITAE) of the output active and reactive power. Different loading and ambient temperature conditions are considered to validate the optimized controller and its fast response through online field programmable gate array (FPGA)-in-the-loop. Then, the weighting factor is optimally selected to reduce the cost of the L-filter and the heat-sink. An optimization problem to minimize the cost design at the worst case of loading condition for grid-feeding VSI is formulated. The results from this optimization problem are the filter inductance, the thermal resistance of the heat-sink, and the optimal switching frequency with the optimal weighting factor. The VSI test-bed using the optimized parameters is used to verify the proposed work experimentally. Adopting the OASF algorithm that employs the optimal weighting factor for grid-feeding VSI, the percentages of the reductions in the slope of the steady state junction temperature profile compared to fixed frequencies of 10 kHz, 14.434 kHz, and 20 kHz are about 6%, 30%, and 18%, respectively.

ACS Style

Issam A. Smadi; Saher Albatran; Hamzeh J. Ahmad. On the Performance Optimization of Two-Level Three-Phase Grid-Feeding Voltage-Source Inverters. Energies 2018, 11, 400 .

AMA Style

Issam A. Smadi, Saher Albatran, Hamzeh J. Ahmad. On the Performance Optimization of Two-Level Three-Phase Grid-Feeding Voltage-Source Inverters. Energies. 2018; 11 (2):400.

Chicago/Turabian Style

Issam A. Smadi; Saher Albatran; Hamzeh J. Ahmad. 2018. "On the Performance Optimization of Two-Level Three-Phase Grid-Feeding Voltage-Source Inverters." Energies 11, no. 2: 400.

Journal article
Published: 15 December 2017 in Electronics
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Enhancing the performance of the voltage source inverters (VSIs) without changing the hardware structure has recently acquired an increased amount of interest. In this study, an optimization algorithm, enhancing the quality of the output power and the efficiency of three-phase grid connected VSIs is proposed. Towards that end, the proposed algorithm varies the switching frequency (fsw) to maintain the best balance between switching losses of the insulated-gate-bipolar-transistor (IGBT) power module as well as the output power quality under all loading conditions, including the ambient temperature effect. Since there is a contradiction with these two measures in relation to the switching frequency, the theory of multi-objective optimization is employed. The proposed algorithm is executed on the platform of Altera® DE2-115 field-programmable-gate-array (FPGA) in which the optimal value of the switching frequency is determined online without the need for heavy offline calculations and/or lookup tables. With adopting the proposed algorithm, there is an improvement in the VSI efficiency without degrading the output power quality. Therefore, the proposed algorithm enhances the lifetime of the IGBT power module because of reduced variations in the module’s junction temperature. An experimental prototype is built, and experimental tests are conducted for the verification of the viability of the proposed algorithm.

ACS Style

Saher Albatran; Issam A. Smadi; Hamzeh J. Ahmad; Ahmed Koran. Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters. Electronics 2017, 6, 110 .

AMA Style

Saher Albatran, Issam A. Smadi, Hamzeh J. Ahmad, Ahmed Koran. Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters. Electronics. 2017; 6 (4):110.

Chicago/Turabian Style

Saher Albatran; Issam A. Smadi; Hamzeh J. Ahmad; Ahmed Koran. 2017. "Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters." Electronics 6, no. 4: 110.

Conference paper
Published: 01 November 2017 in 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA)
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This paper presents a novel compact AC/AC converter suitable for hybrid microgrids. The proposed topology is used to interconnect two three-phase renewable energy resources and one three-phase load to the grid, side by side with the appropriate generalized pulse width modulation and control method of the microgrid power flow. The proposed topology, generalized pulse width modulation, and the utilized control methods are introduced in this paper. The proposed converter has impact not only to the size but also to the overall cost of the microgrid. Simulation results are provided to demonstrate the validity and the applicability of the proposed converter and the employed control method.

ACS Style

Issam Smadi; Saher Albatran; Mohammad A. Alsyouf. A novel compact AC/AC converter for hybrid microgrids. 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA) 2017, 137 -141.

AMA Style

Issam Smadi, Saher Albatran, Mohammad A. Alsyouf. A novel compact AC/AC converter for hybrid microgrids. 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA). 2017; ():137-141.

Chicago/Turabian Style

Issam Smadi; Saher Albatran; Mohammad A. Alsyouf. 2017. "A novel compact AC/AC converter for hybrid microgrids." 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA) , no. : 137-141.

Conference paper
Published: 01 October 2017 in IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
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This paper presents a selective harmonics reduction for a 3(n+1) shared switch inverter topology utilizing optimal arrangement of the n-modulated signal. Under different modulation indices and operating power frequencies the purpose of the proposed procedure is to select an optimal load connection and/or modulation offsetting based on the desired objective function. Three performance indices are studied in this paper, namely, the sum of the total harmonic distortion (THD), the sum of the weighted THD, and the sum THD of the first eleventh harmonics of all the loads. The proposed mathematical description will achieve extra degrees of freedom that improve the quality of the output signal without any additional burden. A general procedure for distributing the input dc voltage with correct sharing during linear modulation region and proper voltage utilization in overmodulation region is presented. Then, general and comprehensive presentation to the used pulse width modulation (PWM) technique is discussed showing the new degrees of freedom in the applied offsets as decision variables. Field-programmable gate array (FPGA) in-the-loop simulations are done to illustrate the effectiveness of the proposed procedure.

ACS Style

Saher Albatran; Issam A. Smadi; Mohammad A. Alsyouf. Selective harmonics reduction for 3(n+1) switch inverter using optimal leveling and sorting PWM technique. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society 2017, 1519 -1524.

AMA Style

Saher Albatran, Issam A. Smadi, Mohammad A. Alsyouf. Selective harmonics reduction for 3(n+1) switch inverter using optimal leveling and sorting PWM technique. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. 2017; ():1519-1524.

Chicago/Turabian Style

Saher Albatran; Issam A. Smadi; Mohammad A. Alsyouf. 2017. "Selective harmonics reduction for 3(n+1) switch inverter using optimal leveling and sorting PWM technique." IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society , no. : 1519-1524.

Conference paper
Published: 01 November 2015 in IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society
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In this paper, an exact fuzzy modeling is adapted to design a nonlinear controller/observer for an inverted pendulum on a cart. Based on computed torque method, the nonlinear model is simplified, and two scalar valued auxiliary functions are defined and used to construct a full fuzzy model. Based on the obtained model, efficient and more practical controller and observer are designed with less complexity to stabilize the inverted pendulum on a cart. Simulation results are provided to illustrate the fruitfulness of the proposed methodology and the accuracy of the designed observer.

ACS Style

Issam A. Smadi; Saher Albatran. Nonlinear controller-observer design for an inverted pendulum on a cart based on full fuzzy modeling. IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society 2015, 003035 -003039.

AMA Style

Issam A. Smadi, Saher Albatran. Nonlinear controller-observer design for an inverted pendulum on a cart based on full fuzzy modeling. IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society. 2015; ():003035-003039.

Chicago/Turabian Style

Issam A. Smadi; Saher Albatran. 2015. "Nonlinear controller-observer design for an inverted pendulum on a cart based on full fuzzy modeling." IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society , no. : 003035-003039.

Journal article
Published: 09 September 2013 in IEEE Transactions on Industrial Electronics
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This paper presents the mathematical and harmonic analyses of output phase voltages of three-phase voltage source inverters which employ a hybrid two-dimensional-three-dimensional (2-D-3-D) space vector modulation (SVM) voltage control algorithm. The explicit time-domain representation of the harmonic components in addition to the total harmonic distortion (THD) of the output phase voltages is given in terms of system and control parameters. This paper also investigates the harmonic characteristics and THD performance against the linearity of the modulation region which helps in the harmonic performance and design studies of such inverters employing the hybrid 2-D-3-D SVM. The fundamental component of the output voltages follows the reference with lower THD in the linear modulation region rather than the overmodulation region. Experimental results are used to validate these analyses as well as the effectiveness of the hybrid 2-D-3-D SVM algorithm for generating balanced and low THD phase voltages.

ACS Style

Saher Albatran; Yong Fu; Ahmad Albanna. Comprehensive Mathematical Description and Harmonic Analysis of Hybrid Two-Dimensional–Three-Dimensional Space Vector Modulation. IEEE Transactions on Industrial Electronics 2013, 61, 3327 -3336.

AMA Style

Saher Albatran, Yong Fu, Ahmad Albanna. Comprehensive Mathematical Description and Harmonic Analysis of Hybrid Two-Dimensional–Three-Dimensional Space Vector Modulation. IEEE Transactions on Industrial Electronics. 2013; 61 (7):3327-3336.

Chicago/Turabian Style

Saher Albatran; Yong Fu; Ahmad Albanna. 2013. "Comprehensive Mathematical Description and Harmonic Analysis of Hybrid Two-Dimensional–Three-Dimensional Space Vector Modulation." IEEE Transactions on Industrial Electronics 61, no. 7: 3327-3336.

Conference paper
Published: 01 July 2013 in 2013 4th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
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The mathematical analysis of three-phase voltage source inverters' output phase voltages, when employing the hybrid 2D-3D space vector modulation (SVM) voltage control algorithm, is derived in this paper. The results of all modulation steps are given in terms of system and control parameters. The presented mathematical description is validated by comparing the output from the equation and the results from the Simulink model. The paper also compares between the hybrid 2D-3D SVM and conventional 2D SVM for inductive and resistive loading conditions. From power quality perspective, the simulation case studies proof that the hybrid 2D-3D SVM is better than the conventional 2D SVM.

ACS Style

Saher Albatran; Yang Fu; Ahmad Albanna. Switching function notation for hybrid 2D-3D space vector modulation. 2013 4th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) 2013, 1 -7.

AMA Style

Saher Albatran, Yang Fu, Ahmad Albanna. Switching function notation for hybrid 2D-3D space vector modulation. 2013 4th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG). 2013; ():1-7.

Chicago/Turabian Style

Saher Albatran; Yang Fu; Ahmad Albanna. 2013. "Switching function notation for hybrid 2D-3D space vector modulation." 2013 4th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) , no. : 1-7.

Conference paper
Published: 01 June 2013 in 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL)
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This paper presents a comparative mathematical and harmonic analyses of three-phase voltage sourced inverters when employing two space vector modulation (SVM) voltage control algorithms, namely: 2D SVM and Hybrid 2D-3D SVM algorithms. The analysis compares the harmonic quality of the modulated output. The harmonic analysis covers the fundamental component in addition to the output harmonic spectrum, as well as the harmonic performance in view of the total harmonic distortion (THD) index. The presented mathematical description of 2D SVM clarifies the harmonics injected into the reference voltage, and additionally, addresses the increase of the dc bus utilization; however, the analysis shows clearly a degraded quality of the modulated output. MATLAB/Simulink simulation studies show that the hybrid 2D-3D algorithm offers better harmonic and quality performance over 2D SVM as the spectral content of the modulated output consists of less non-power spectral components.

ACS Style

Saher Albatran; Yong Fu; Ahmad Albanna. Comparative harmonic analysis of hybrid 2D-3D SVM and conventional 2D SVM. 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL) 2013, 1 -7.

AMA Style

Saher Albatran, Yong Fu, Ahmad Albanna. Comparative harmonic analysis of hybrid 2D-3D SVM and conventional 2D SVM. 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL). 2013; ():1-7.

Chicago/Turabian Style

Saher Albatran; Yong Fu; Ahmad Albanna. 2013. "Comparative harmonic analysis of hybrid 2D-3D SVM and conventional 2D SVM." 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL) , no. : 1-7.