Haitham Abu-Rub

Qatar University, Ad Dawḩah, Baladīyat ad Dawḩah, Qatar

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Publications (172)201.05 Total impact

  • Sk Moin Ahmed · Haitham Abu-Rub · Zainal Salam
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    ABSTRACT: This paper proposes a space-vector modulation (SVM) algorithm for a five-phase open-end winding motor drive system, fed by a dual nonsquare matrix converter (MC). The input to each of the MCs (MC-1 and MC-2) is a three-phase utility grid, and the output is a five-phase with variable voltage, variable frequency capability. The major contribution of this paper is the elimination of the detrimental common-mode voltage (CMV) that appears across the motor winding. In addition, the proposed SVM allows for a unity power factor at the input side, while boosting the output phase voltage by up to 150% of input. This paper presents a comprehensive analysis, to obtain the expression for the SVM modulating signals that are used to generate the switching pulses for the MC. To verify the idea, a modular, reconfigurable 5-kW MC prototype, feeding a five-phase induction motor is built. The control algorithm is implemented on a dSPACE-1006 platform. The test shows that the CMV is successfully eliminated from the motor winding. Other results (i.e., current and voltage waveforms) are also found to be in very close agreement with the theoretical prediction and MATLAB simulation.
    IEEE Transactions on Industrial Electronics 10/2015; 62(10):1-1. DOI:10.1109/TIE.2015.2420038 · 6.50 Impact Factor
  • Omar Ellabban · Haitham Abu-Rub · Sertac Bayhan
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    ABSTRACT: Conventional matrix converters (MCs) have limited voltage gain that is less than 0.866, whether for direct MC (DMC) or indirect MC (IMC). The Z-source matrix converters (ZSMC) overcome the voltage gain limitation of the traditional MC and achieve buck and boost operation with reduced switches count, therefore achieving low cost, high efficiency, and reliability, compared to the back-to-back converter. Furthermore, it will leads to more MC industrial applications. This paper presents an up to date comprehensive overview of the different Z-source matrix converter topologies and their configurations, circuit analysis, modulation schemes, and applications. This study offers a comprehensive and systematic reference for the future development of the Z-source matrix converters.
    IEEE Transactions on Power Electronics 08/2015; DOI:10.1109/TPEL.2015.2471799 · 6.01 Impact Factor
  • Yushan Liu · Baoming Ge · Haitham Abu-Rub · Dongsen Sun
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    ABSTRACT: The second harmonic $(2omega)$ power ripple of single-phase quasi-Z-source (qZS) photovoltaic (PV) inverter highly affects the whole system's design and performance. The topology's $2omega$ ripple model is very important to analyze qZS PV inverter's $2omega$ voltage and current ripple. The existing models did not consider the PV-panel dynamic and terminal capacitors, which causes the theoretical results apart from the truth. In this paper, a comprehensive modeling for single-phase qZS-PV inverter is proposed, where the $2omega$ ripple model of the qZS-PV inverter system with a real PV source is established and discussed without and with a PV terminal capacitor. The influences from qZS inductance and capacitance, and PV-panel terminal capacitance to the $2omega$ voltage and current ripple are investigated using the built model. The system parameter design method is proposed to mitigate this ripple. Simulation and experimental results validate the proposed $2omega$ ripple model and parameter design method.
    IEEE Transactions on Industrial Electronics 07/2015; 62(7):4194-4202. DOI:10.1109/TIE.2014.2384472 · 6.50 Impact Factor
  • A. Iqbal · K. Rahman · R. Alammari · H. Abu-Rub
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    ABSTRACT: In this paper a generalized multi-phase space vector theory is considered for developing the space vector modulation of a three-phase to six-phase AC to AC converter. The modulation is based on the control of the voltage vectors in the first d-q plane, while imposing the remaining voltage vectors in the second and the third planes (x-y, 0+-0-), being zero. The duty cycles of the bidirectional switches are obtained using space vector modulation theory. The proposed converter system offers full control of the input power factor, no limitation on the output frequency range and nearly sinusoidal output voltage. The proposed space vector algorithm can be fully implemented on a digital platform. The theoretical analysis is confirmed by digital simulations which is further verified using real time implementation.
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    ABSTRACT: This study discusses the space vector pulse-width modulation (SVPWM) scheme for an eleven-phase two-level voltage source inverter, aimed at producing a sinusoidal output voltage waveform. Generalised space vector theory is used to realise the SVPWM. As per the general inverter switching theory, there are 211 = 2048 switching states that yield 2046 active voltage space vectors and one zero voltage vector, which results with two switching states. Out of the total of 2046 active voltage vectors, the most suitable set comprising 110 active voltage vectors is identified and is utilised in the implementation of the SVPWM. The sinusoidal voltage is obtained by controlling the duty cycles of the applied voltage space vectors in such a way that the non-zero reference voltage in the first (d-q) plane is achieved, while simultaneously zeroing the average voltage in the other four (x-y) planes in accordance with the zero references. The theoretical results are verified by experimentation using a passive resistive-inductive load. Finally, experimentally obtained total harmonic distortion values of the phase voltage and current for the eleven-phase SVPWM are compared with the corresponding values obtained using SVPWM for other odd phase numbers.
    IET Power Electronics 06/2015; 8(6). DOI:10.1049/iet-pel.2014.0327 · 1.68 Impact Factor
  • Source
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    ABSTRACT: Due to variability of solar energy resources, maximum power point tracking (MPPT) of photovoltaic (PV) is required to ensure continuous operation at the maximum power point (MPP) and maximize the energy harvest. This paper presents a digital model predictive control technique to employ the MPPT for flyback converter for photovoltaic applications. The MPP operating point is determined by using perturb and observe (P&O) technique. The proposed two-steps predictive model based MPPT presents significant advantages in dynamic response and power ripple at steady state. A characteristic of MPC is the use of system models for selecting optimal actuations, thus evaluating the effect of model parameter mismatch on control effectiveness is of interest. In this paper the load model is eliminated from the proposed MPC formulation by using an observer based technique. The sensitivity analysis results indicate a more robust controller to uncertainty and disturbances in the resistive load.
    IEEE First Workshop on Smart Grid & Renewable Energy (SGRE), Qatar; 03/2015
  • Source
    Mohammad B. Shadmand · Xio Li · Robert S. Balog · Haitham Abu-Rub
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    ABSTRACT: This paper presents maximum power point tracking (MPPT) and decoupled power control for single phase grid-tied photovoltaic (PV) systems. Model predictive control (MPC) technique is used to extract the maximum power from the PV array and feed it to grid. The stochastic behavior of solar energy necessitates MPPT of PV system to operate at maximum power point and make the system economical. Power control of grid-tied inverters are commonly based on synchronous reference frame transformation, this methodology requires the phase angle information by phase-looked loop (PLL). In this paper MPC technique is used for decoupled active and reactive power control of the single phase grid-tied inverter. The proposed technique does not need PLL, modulation module and synchronization transform, which makes the control algorithm simple for digital implementation. Comparing the developed technique to the conventional perturb & observe (P&O) method indicates significant improvement in PV system performance. The simulation result is validated by implementing the control algorithm experimentally using dSPACE 1007.
    IEEE First Workshop on Smart Grid & Renewable Energy (SGRE), Qatar; 03/2015
  • Shuo Liu · Baoming Ge · Xinjian Jiang · Haitham Abu-Rub · Fang Zheng Peng
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    ABSTRACT: Conventional matrix converters (MCs) have limited voltage gain that is less than 0.866, whether for direct MC (DMC) or indirect MC (IMC). Existing Z-source (ZS)/discontinuous quasi-Z-source (qZS) DMCs and ZS IMCs achieved larger than 0.866 voltage gain; however, the former inherited the complex commutation from DMC, and the latter involved a ZS network in dc link and led to non-all-silicon solution. In this paper, ZS and discontinuous qZS networks of existing ZS/qZS DMCs are used for an IMC topology for simplifying commutation and having high voltage gain, but they require extra input filter to reduce current harmonics. A new continuous qZS IMC is proposed, where a qZS network integrates the filtering function of the grid side; hence, additional input filter is avoided in the proposed continuous qZS IMC. Three new IMCs are compared in detail, in terms of voltage gain, current ripple, voltage ripple, inductor current and capacitor voltage stresses, ZS/qZS switch current and voltage stresses, filtering function, input current total harmonic distortion (THD), output voltage THD, and efficiency. Their control and modulation methods are presented to achieve the desired performances. Experimental comparisons verify the theoretical analysis and that the proposed continuous qZS IMC is a promising topology.
    IEEE Transactions on Industrial Electronics 02/2015; 62(2):692-701. DOI:10.1109/TIE.2014.2349877 · 6.50 Impact Factor
  • Source
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    ABSTRACT: For high-voltage (HV) applications, the designers mostly prefer the classical DC–DC boost converter. However, it lacks due to the limitation of the output voltage by the gain transfer ratio, decreased efficiency and its requirement of two sensors for feedback signals, which creates complex control scheme with increased overall cost. Furthermore, the output voltage and efficiency are reduced due to the self-parasitic behavior of power circuit components. To overcome these drawbacks, this manuscript provides, the theoretical development and hardware implementation of DC–DC step-up (boost) power converter circuit for obtaining extra output-voltage high-performance. The proposed circuit substantially improves the high output-voltage by voltage-lift technology with a closed loop proportional–integral controller. This complete numerical model of the converter circuit including closed loop P-I controller is developed in simulation (Matlab/Simulink) software and the hardware prototype model is implemented with digital signal processor (DSP) TMS320F2812. A detailed performance analysis was carried out under both line and load regulation conditions. Numerical simulation and its verification results provided in this paper, prove the good agreement of the circuit with theoretical background.
    12/2014; DOI:10.1016/j.jestch.2014.11.005
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    ABSTRACT: In this paper, we present a new approach based on discrete Fourier transform (DFT) analysis for controller tuning of the closed-loop system with unknown plant. The DFT analysis is used to process the closed-loop measurements collected online to derive the frequency response of an initial closed-loop system that does not provide a good performance. Based on the closed-loop frequency response data, we propose two methods for tuning PID controller parameters according to some desired closed-loop performance specifications. The proposed approach can be applied online because the closed-loop system does not need to be stopped for data collection. The tuning problem of rotor speed controllers of electric drives, is chosen as an example to experimentally validate our proposed method. Specifically, we are interested here in the control of an induction motor. The availability of high-performance computational and storage facilities greatly simplifies the collection of measured data used for controller tuning. The experimental results presented in this paper demonstrate the efficacy and usefulness of the proposed control design method in many industrial applications.
    12/2014; 2(4):1013-1023. DOI:10.1109/JESTPE.2014.2343276
  • Source
    Yushan Liu · Baoming Ge · Haitham Abu-Rub · Fang Zheng Peng
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    ABSTRACT: An effective control method, including system-level control and pulsewidth modulation for quasi-Z-source cascade multilevel inverter (qZS-CMI) based grid-tie photovoltaic (PV) power system is proposed. The system-level control achieves the grid-tie current injection, independent maximum power point tracking (MPPT) for separate PV panels, and dc-link voltage balance for all quasi-Z-source H-bridge inverter (qZS-HBI) modules. The complete design process is disclosed. A multilevel space vector modulation (SVM) for the single-phase qZS-CMI is proposed to fulfill the synthetization of the step-like voltage waveforms. Simulation and experiment based on a seven-level prototype are carried out to validate the proposed methods.
    IEEE Transactions on Industrial Informatics 12/2014; 10(1):399-407. DOI:10.1109/TII.2013.2280083 · 8.79 Impact Factor
  • Yushan Liu · Haitham Abu-Rub · Baoming Ge
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    ABSTRACT: The current and emerging investigations on Z-source/quasi-Z-source inverters (ZSIs/qZSIs) are presented. The ZSI/qZSI fulfills buck/boost capability in single-stage topology and overcomes the limits of traditional voltage source inverters (VSIs). Hence, high reliablity, high efficiency, and low cost can be achieved. The recently derived impedance networks with improved voltage gain are discussed. The classic and newly proposed modulations and feedback controls for ZSIs/qZSIs are compared. Finally, the emerging applications and trends of ZSIs/qZSIs to photovoltaic (PV) power generation are discussed. This study offers a comprehensive and systematic reference for the future development of the high-performance ZSI/qZSI.
    IEEE Industrial Electronics Magazine 12/2014; 8(4):32-44. DOI:10.1109/MIE.2014.2307898 · 4.03 Impact Factor
  • Omar Abdel-Rahim · Omar Ellabban · Haitham Abu-Rub
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    ABSTRACT: Direct matrix Converter is considered as a powerful tool for AC/AC power conversion providing AC output voltage and frequency control. It also has many features such as a bidirectional power flow, a compact size and a direct conversion capability. In this paper, matrix converter is used to convert a five phase input voltage into three phase output voltage with controlling output current amplitude and frequency. Five-to-three phase matrix converter is used to control a three phase induction motor. Using a five-to-three phase matrix converter enables using multiphase generation units and at the same times there is no need to change existing three phase loads. Predictive Torque Control (PTC) algorithm is used to control the induction motor fed by a matrix converter. The performance of the proposed speed control system is verified by a MATLAB simulation of a 4 kW induction motor fed by a five-to-three phase matrix. The simulation results during different operation modes verify the validity of the proposed closed loop speed control method.
    The 40th Annual Conference of the IEEE Industrial Electronics Society, IECON'2014, Dallas, TX - USA; 11/2014
  • Omar Ellabban · Haitham Abu-Rub
    Qatar Foundation Annual Research Conference, Doha, Qatar; 11/2014
  • Source
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    ABSTRACT: The quasi- $Z$ source (qZS) cascaded multilevel inverter (CMI) (qZS-CMI) presents attractive advantages in application to photovoltaic (PV) power system. Each PV panel connects to an H-bridge qZS inverter (qZSI) to form a power generation module. The distributed maximum power point tracking and all modules' dc-link peak voltage balance can be achieved. However, it is the same with the conventional CMI that the second-harmonic ( $2omega$) voltage and current ripples exist in each qZSI module. It is crucial for a qZS-CMI to design the reasonable qZS network parameters to limit the ripples within a desired range. This paper proposes an analytic model to accurately calculate the $2omega$ voltage and current ripples of each qZSI module. A qZS impedance design method based on the built model is proposed to limit the $2omega$ ripples of dc-link voltage and inductor current. Simulated and experimental results through using the designed 1.5-kW prototype validate the proposed analytic model and the design method. Furthermore, this paper analyzes all of the operating states for a qZSI module and calculates the power loss. The measured efficiency from the prototype verifies the theoretical calculation, and the qZS-CMI-based grid-tie PV power system is tested in practical.
    IEEE Transactions on Industrial Electronics 11/2014; 61(11):6108-6117. DOI:10.1109/TIE.2014.2304913 · 6.50 Impact Factor
  • Source
    Baoming Ge · Yushan Liu · Haitham Abu-Rub
    IET Renewable Power Generation 11/2014; 8(8):925-936. DOI:10.1049/iet-rpg.2013.0221 · 1.90 Impact Factor
  • Marco Rivera · Haitham Abu-Rub · Z. SALAM · M. RIVERA · Sk Moin Ahmed
    40th annual conference of IEEE industrial electronics society-IECON, DALLAS, TEXAS; 11/2014
  • Source
    Mohammad B. Shadmand · Robert S. Balog · Haitham Abu-Rub
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    ABSTRACT: In a DC distribution system, where multiple sources supply a common bus, current sharing is an important issue. When renewable energy sources are used, such as photovoltaic (PV), DC/DC converters are needed to decouple the input voltage, which can be due to operating conditions such as Maximum Power Point Tracking (MPPT), from the DC bus voltage. Since different sources may have different power delivery capacities that may vary with time, coordination of the interface to the bus is of paramount importance to ensure reliable system operation. Further, since these sources are most likely distributed throughout the system, distributed controls are needed to ensure a robust and fault tolerant control system. This paper presents a Model Predictive Control-Maximum Power Point Tracking (MPC-MPPT) and a MPC-DROOP current regulator to interface PV in smart DC distribution systems. Back-to-back DC/DC converters control both the input current from the PV module and the droop characteristic of the output current injected into the distribution. The predictive controller speeds up both of the control loops since it predicts and corrects for error before the switching signal is applied to the respective converter.
    Energy Conversion, IEEE Transaction on 09/2014; 29(4). DOI:10.1109/TEC.2014.2362934 · 2.33 Impact Factor
  • Source
    Omar Ellabban · Haitham Abu-Rub · Frede Blaabjerg
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    ABSTRACT: Electric energy security is essential, yet the high cost and limited sources of fossil fuels, in addition to the need to reduce greenhouse gasses emission, have made renewable resources attractive in world energy based economies. The potential for renewable energy resources is enormous because they can, in principle, exponentially exceed the world's energy demand; therefore, these types of resources will have a significant share in the future global energy portfolio, much of which is now concentrating on advancing their pool of renewable energy resources. Accordingly, this paper presents how renewable energy resources are currently being used, scientific developments to improve their use, their future prospects, and their deployment. Additionally, the paper represents the impact of power electronics and smart grid technologies that can enable the proportionate share of renewable energy resources.
    Renewable and Sustainable Energy Reviews 08/2014; 39:748-764. DOI:10.1016/j.rser.2014.07.113 · 5.90 Impact Factor
  • Source
    Yushan Liu · Baoming Ge · Haitham Abu-Rub · Fang Zheng Peng
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    ABSTRACT: The quasi-Z-source inverter (qZSI) with battery can balance the stochastic fluctuations of PV power injected to the grid/load, but there is no literature to disclose its modelling and controller design in detail. This study proposed a dynamic small-signal model of qZSI with battery and a control strategy for photovoltaic (PV) power generation system. The built model discloses the dynamic relationship of PV panel voltage, battery current, quasi-Z-source inductor currents and capacitor voltages. The proposed control method achieves the grid-tie operation with unity power factor, PV panel??s maximum power point tracking and battery management. The novel space vector modulation for the qZSI divides the total shoot-through time interval into six equal parts per control cycle to be combined into the six switching moments, and lower inductor current ripple and higher inverter efficiency are performed. The experimental and simulation results verify the theoretical analysis and proposed control methods.
    IET Power Electronics 07/2014; 7(7):1665-1674. DOI:10.1049/iet-pel.2013.0389 · 1.68 Impact Factor

Publication Stats

1k Citations
201.05 Total Impact Points


  • 2013–2014
    • Qatar University
      • Department of Electrical Engineering
      Ad Dawḩah, Baladīyat ad Dawḩah, Qatar
    • University of Nottingham
      • Department of Electrical and Electronic Engineering
      Nottigham, England, United Kingdom
    • Aswan University
      • Department of Electrical Engineering
      Assuan, Aswān, Egypt
  • 2009–2014
    • Gdansk University of Technology
      • Faculty of Electrical and Control Engineering
      Danzig, Pomeranian Voivodeship, Poland
  • 2007–2014
    • Texas A&M University at Qatar
      Ad Dawḩah, Baladīyat ad Dawḩah, Qatar
  • 2001–2014
    • Texas A&M University
      • Department of Electrical and Computer Engineering
      College Station, Texas, United States
  • 2010
    • Beijing Jiaotong University
      • School of Electrical Engineering
      Beijing, Beijing Shi, China
    • Universidad Técnica Federico Santa María
      • Department of Electronics
      Valparaíso, Region de Valparaiso, Chile
    • Aligarh Muslim University
      • Department of Electronics Engineering
      Koil, Uttar Pradesh, India
  • 2006
    • Bergische Universität Wuppertal
      Wuppertal, North Rhine-Westphalia, Germany
  • 2003–2005
    • Birzeit University
      • Department of Electrical Engineering
      Bīre, West Bank, Palestinian Territory