Haitham Abu-Rub

Texas A&M University at Qatar, Ad Dawḩah, Baladīyat ad Dawḩah, Qatar

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Publications (209)212.69 Total impact

  • Haitham Abu-Rub · Baoming Ge · Frede Blaabjerg · Yushan Liu · Omar Ellabban

    No preview · Book · Jun 2016
  • Mohamed Trabelsi · Haitham Abu-Rub
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    ABSTRACT: The system under study consists of a three-phase sixteen-cell CHB inverter where each module is fed by a qZS network (Figure 1). The proposed combined controller achieves grid-tie current injection, DC-link voltage balance for all qZS-CHB inverter modules, anti-islanding protection, and fault-tolerant operation. The fault-tolerance feature is explored and discussed for two modulation techniques, which are the Level-Shifted Pulse Width Modulation (LSPWM) and Pulse Width Amplitude Modulation (PWAM). The proposed strategy can be easily implemented without extra hardware requirements. It takes into account key crucial factors for high-efficiency and reliability grid-connected PV systems such as; cost reduction (selection of high efficient and high performing qZS-CHB MLI topology), high power quality (grid current injection with unity power factor and low harmonics distortion), active anti-islanding protection (according to grid codes), and fault-tolerance (continuous operation during malfunction of some system components, which leads to the system reconfiguration). The fault-tolerant design is taking advantage of the large number of redundant switching states for the same output voltage level, which characterizes the selected cascaded topology. However, one can note that this redundancy is effective only for the intermediate levels output voltages, while the extreme levels (highest and lowest levels) are achieved by only one switching state. Accordingly, the proposed approach offers circuit reconfiguration (based on a measurement based fault detection strategy) and voltage stress adjustment to achieve a balanced line-to-line voltage when a fault occurs. Moreover, Battery Energy Storage Sources (BESS) are used as additional source of energy to support the grid at fault times. At normal operating conditions, the BESS are used to store the excess power available from the PV to avoid the over voltage state. At fault conditions, the BESS could be used to provide the amount of power lost because of the failure of one or more of the inverter modules.
    No preview · Conference Paper · Mar 2016
  • Sertac Bayhan · H. Abu-Rub

    No preview · Conference Paper · Mar 2016
  • Sertac Bayhan · Mohamed Trabelsi · Haitham Abu-Rub
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    ABSTRACT: In this paper, Z-Source (ZS) four-leg inverter equipped with a Model Predictive Control (MPC) strategy for standalone Photovoltaic (PV) system under various load conditions is presented. The inverter is aimed to supply simultaneously three-phase and single-phase AC loads with balanced voltage and constant frequency. In this topology, a simple LC (Z) network is used instead of the boost converter to obtain single stage power conversion system. The MPC scheme is developed to control output currents of the inverter and ZS network current and voltage. Hardware-In-The-Loop (HIL) tests have been performed to verify steady-state and transient performances of the proposed system under balance/unbalanced load and/or reference current conditions.
    No preview · Conference Paper · Mar 2016
  • Mohamed Trabelsi · Haitham Abu-Rub · Baoming Ge
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    ABSTRACT: This paper proposes a 1 MW grid-tie photovoltaic system by connecting quasi-Z-Source (qZS) networks into Cascaded H-Bridge (CHB) inverter. The proposed Power Conditioning System (PCS) consists of a 3-phase 48-cell CHB inverter where each module is fed by a qZS network. The proposed topology allows boosting the input voltage to a higher level while solving the traditional imbalance problem of DC-link voltage in CHB inverters. A multilevel output voltage waveform is produced using an enhanced phase shifted pulse width modulation technique, which inserts shoot-through states into the conventional zero states to control the qZS-CHB module. The effective control schemes are proposed to achieve grid-tie current injection, low Total Harmonic Distortion (THD) current, unity power factor, and DC-link voltage balance for all qZS-CHB inverter modules. A 1 MW system is built in MATLAB/SIMULINK environment to verify the proposed multilevel PV energy conversion system and its control principles.
    No preview · Conference Paper · Mar 2016
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    ABSTRACT: In this paper, a finite control set Model Predictive Control (MPC) for grid-tie quasi-Z-Source (qZS) based multilevel inverter is proposed. The proposed Power Conditioning System (PCS) consists of a single-phase 2-cell Cascaded H-Bridge (CHB) inverter where each module is fed by a qZS network. The aim of the proposed control technique is to achieve grid-tie current injection, low Total Harmonic Distortion (THD) current, unity power factor, while balancing DC-link voltage for all qZS-CHB inverter modules. The feasibility of this strategy is validated by simulation using Matlab/Simulink environment.
    No preview · Conference Paper · Mar 2016
  • M. Metry · Sertac Bayhan · R. Balog · H. Abu-Rub

    No preview · Conference Paper · Feb 2016

  • No preview · Conference Paper · Feb 2016
  • Source
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    ABSTRACT: Modular multilevel converter (MMC) is a promising new topology for high-voltage applications. The MMC is made of several identical submodules. For proper operation, each submodule can be considered as a controlled voltage source where capacitor’s voltage should be maintained at a certain level. Besides, the minimization of the circulating current, which does not flow to the load, is crucial for achieving stable and efficient operation of the MMC. The interrelations among the load current, circulating current, and capacitor voltages complicate the MMC control. This paper aims to achieve stable and balanced voltage and current control with reduced circulating current in various operating conditions. The proposed control uses weighted model predictive control based on a normalized cost function to select the inverter switching patterns which control the load current while minimizing voltage-fluctuation and circulating current. The weighting factors were selected based on minimizing the load current THD and circulating current. The analysis is conducted on a low power case study of single-phase 4-cells MMC with possible extension to higher number of cells. The low-power three-level prototype is designed and built to validate this proposed method. Theoretical analysis, simulation and experimental results are presented and compared. Parameters sensitivity analysis was also conducted. They all confirm the effectiveness of the proposed control method.
    Full-text · Article · Feb 2016 · IEEE Transactions on Industrial Electronics
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    Sertac Bayhan · Haitham Abu-Rub · Omar Ellabban

    Full-text · Article · Jan 2016 · IET Renewable Power Generation
  • Sertac Bayhan · Haitham Abu-Rub
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    ABSTRACT: This paper presents a model predictive control (MPC) scheme for quasi-Z source (qZS) three-phase four-leg inverters. In order to cope with drawbacks of the traditional voltage source inverters (VSI)s, the qZS three-phase four-leg inverter topology is proposed in this study. To improve control capability of the controller, the MPC scheme is used. The proposed MPC is based mainly on the discrete-time model of the whole system. The proposed controller handles each phase current independently. As a result of this, the proposed qZS four-leg inverter has fault tolerant capability, for example if one leg fails the others can work normally. Simulation studies were performed to verify the steady-state and transient-state performances of the proposed control strategy under balanced/unbalanced reference currents and load conditions.
    No preview · Conference Paper · Nov 2015
  • Source
    Omar Abdel-Rahim · Haitham Abu-Rub · Abdallah Kouzou

    Full-text · Dataset · Oct 2015
  • 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.
    No preview · Article · Oct 2015 · IEEE Transactions on Industrial Electronics
  • Sertac Bayhan · Haitham Abu-Rub
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    ABSTRACT: This paper presents an autonomous frequency and voltage control strategy for a standalone doubly fed induction generator (DFIG). The main aim of this study is to keep stator frequency as well as stator voltage at the desired value under different load and variable wind speed conditions without using position sensor. The proposed sensorless method is based on the detection of the stator frequency and it is designed to operate without a knowledge of any parameter of the DFIG. Hence, the proposed sensorless method can be operated as a modelfree. A proportional-integral (PI) controller is used to control rotor currents as well as stator voltage. Simulation studies were performed to verify the dynamic and steady-state performances of the proposed control strategy under different operating conditions. The results show that the proposed strategy not only has an excellent steady-state and dynamic performance, but also exhibits robustness against wind speed and load variations.
    No preview · Conference Paper · Oct 2015
  • Source
    Dongsen Sun · Baoming Ge · Weihua Liang · Haitham Abu-Rub · Fang Zheng Peng
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    ABSTRACT: The quasi-Z-source cascade multilevel inverter (qZS-CMI) presents many advantages over conventional CMI when applied in photovoltaic (PV) power systems. For example, the qZS-CMI provides the balanced dc-link voltage and voltage boost ability, saves one-third modules, etc. However, the qZS-CMI still cannot overcome the intermittent and stochastic fluctuation of solar power injected to the grid. This paper proposes an energy stored qZS-CMI-based PV power generation system. The system combines the qZS-CMI and energy storage by adding an energy stored battery in each module to balance the stochastic fluctuations of PV power. This paper also proposes a control scheme for the energy stored qZS-CMI-based PV system. The proposed system can achieve the distributed maximum power point track for PV panels, balance the power between different modules, and provide the desired power to the grid. A detailed design method of controller parameters is disclosed. Simulation and experimental results verify the proposed system and the control scheme.
    Full-text · Article · Sep 2015 · IEEE Transactions on Industrial Electronics
  • 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.
    No preview · Article · Aug 2015 · IEEE Transactions on Power Electronics
  • Source
    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.
    Full-text · Article · Jul 2015 · IEEE Transactions on Industrial Electronics
  • A. Iqbal · K. Rahman · R. Al-ammari · H. Abu-Rub
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    ABSTRACT: This paper investigates the fault tolerant control strategies for a three to five-phase dual matrix converter fed open-end load system. There are two three to five phase matrix converter at both the ends of the load. In healthy condition both the matrix converters are sharing the load according to their modulation index. After the occurrence of an open-circuit fault in one of the matrix converter, it is disconnected and the other remaining converter shares the load according to its capacity (maximum rating is half of the dual converter). In the proposed scheme both the converters are sharing the load equally under normal operating conditions. After the clearance of fault, again both the matrix converters start working normally and sharing the load equally. In this paper it is shown that in a dual matrix converter supply system, they can work in healthy condition, post-fault condition and after clearance of the fault without break in continuity of the supply. Space vector pulse width modulation technique is used for control of the dual matrix converters under normal and post-fault conditions. Here open-end five-phase R-L load is taken for validation of the technique. Simulated results are verified experimentally.
    No preview · Article · Jun 2015
  • 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.
    No preview · Article · Jun 2015
  • M. Aguirre · S. Kouro · J. Rodriguez · H. Abu-Rub
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    ABSTRACT: Interleaved boost converters are used in multimegawatt wind energy conversion systems with synchronous generators (SG), after a diode rectifier stage to control the generator and provide voltage elevation for the grid connection at lower speeds. The use of a diode rectifier is possible due to the fact SG do not consume reactive power, making it a cost-effective solution to reduce the size and cost of the full-scale converter needed in SG based turbines. This paper proposes a finite control set model predictive control (FCS-MPC) for the interleaved boost converter capable of effectively distributing the power among the different boost channels. In addition, a new strategy to fix the switching frequency is introduced to the predictive control algorithm. A criterion is presented for the design of the weighting factors. The control method has been tested through simulation on a three-channel interleaved boost converter. The steady-state behavior achieved with the proposed method is similar to the one obtained with classic PI control and PWM. This work enables the use of FCS-MPC for interleaved boost converters, to be further included in existing FCS-MPC algorithms for applications where these converters are used, such as SG based wind energy conversion systems, where this control strategy has already been used for the grid side converter.
    No preview · Article · Jun 2015

Publication Stats

1k Citations
212.69 Total Impact Points

Institutions

  • 2007-2015
    • Texas A&M University at Qatar
      Ad Dawḩah, Baladīyat ad Dawḩah, Qatar
  • 2013-2014
    • Qatar University
      • Department of Electrical Engineering
      Ad Dawḩah, Baladīyat ad Dawḩah, Qatar
    • Gdynia Maritime University
      • Faculty of Marine Electrical Engineering
      Gotenhafen, Pomeranian Voivodeship, Poland
    • University of Nottingham
      • Department of Electrical and Electronic Engineering
      Nottigham, England, United Kingdom
    • Aswan University
      • Department of Electrical Engineering
      Assuan, Aswān, Egypt
  • 2001-2014
    • Texas A&M University
      • Department of Electrical and Computer Engineering
      College Station, Texas, United States
  • 2010
    • Gdansk University of Technology
      • Faculty of Electrical and Control Engineering
      Gdańsk, Pomeranian Voivodeship, Poland
    • Aligarh Muslim University
      • Department of Electronics Engineering
      Koil, Uttar Pradesh, India
  • 2006
    • Bergische Universität Wuppertal
      Wuppertal, North Rhine-Westphalia, Germany
  • 2004
    • Birzeit University
      • Department of Electrical Engineering
      Al Bīrah, WE, Palestinian Territory