<![CDATA[ IEEE Transactions on Energy Conversion - new TOC ]]>
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TOC Alert for Publication# 60 2018May 24<![CDATA[Table of contents]]>332C1C4124<![CDATA[IEEE Power & Energy Society]]>332C2C258<![CDATA[Design, Fabrication, and Test of a Coupled Parametric–Transverse Nonlinearly Broadband Energy Harvester]]>3324574642081<![CDATA[Analysis of Transverse Flux Machines Using a Virtual Mutual Inductance Approach]]>332465472864<![CDATA[Direct Coupling Method for Coupled Field-Circuit Thermal Model of Electrical Machines]]>332473482981<![CDATA[Sensor Fault Tolerance Enhancement of DFIG-WTs via Perturbation Observer-Based DPC and Two-Stage Kalman Filters]]>3324834953264<![CDATA[Problems in the Classic Frequency Shift Islanding Detection Methods Applied to Energy Storage Converters and a Coping Strategy]]>R, L, C load and the conclusions in current literature: the angle by which the total output current of the distributed resources (DR) units leads the point of common coupling (PCC) voltage must be conducted to have the same shifting direction as the load admittance angle during the variation of the frequency. According to the formula and multi-DR operation, the scenarios in which the classic frequency shift methods are applied to energy storage converters are analyzed. The results indicate that the setting of the angle by which the energy storage converter current leads the PCC voltage may need to be modified when running state changes. It results in the problems that the classic methods are not applicable for non-unity power factor (non-UPF) control and have to distinguish between generation mode and consumption mode for UPF control. On account of the problems, a coping strategy, i.e., an improved method, is proposed. The analyses indicate that the improved method is applicable in every state. The last simulations and experiments confirm the preceding conclusions.]]>3324965051040<![CDATA[Robust Control Scheme for Three-Phase Grid-Connected Inverters With <italic>LCL</italic>-Filter Under Unbalanced and Distorted Grid Conditions]]>LCL filters. The validity of the proposed control scheme is demonstrated through comparative simulations and experimental results using a prototype grid-connected inverter.]]>3325065151889<![CDATA[Development of a Singly Fed Mechanical-Offset Machine for Electric Vehicles]]>3325165256407<![CDATA[Multilayer Modular Balancing Strategy for Individual Cells in a Battery Pack]]>3325265361545<![CDATA[Sequence Impedance Modeling and Analysis of Type-III Wind Turbines]]>332537545926<![CDATA[An Efficient PV Power Optimizer With Reduced EMI Effects: Map-Based Analysis and Design Technique]]>$eta geq$ 98%. Moreover, this optimized frequency-domain as well as time-domain performance are numerically analyzed and then verified experimentally using a prototype modular boost-type PV system.]]>3325465551064<![CDATA[An Enhanced Control Scheme for an IPM Synchronous Generator Based Wind Turbine With MTPA Trajectory and Maximum Power Extraction]]>3325565663530<![CDATA[Design of Doubly Complementary Stator-PM Machine With High Magnet Utilization Factor for Low-Cost Applications]]>3325675752238<![CDATA[Magnetic Analysis of Symmetrical Three-Phase Y-Core Inductors]]>332576583819<![CDATA[Topology Exploration and Torque Component Analysis of Double Stator Biased Flux Machines Based on Magnetic Field Modulation Mechanism]]>3325845932352<![CDATA[Modeling and Emulation of a Rotating Paddle Type Wave Energy Converter]]>3325946042141<![CDATA[A New Method of Recording Generator Dynamics and Its Application to the Derivation of Synchronous Machine Parameters for Power System Stability Studies]]>d-q-axis synchronous machine parameters. An FPGA is used in realizing the rotor-angle transducer and it simultaneously detects the frequency of the generator terminal voltage. The DFT algorithm is combined with an interpolation technique that downsamples the high-frequency sampled data using the measured power system frequency. This paper also describes a practical method for determining synchronous machine model parameters. The proposed algorithm for recording the generator dynamics was implemented in terms of Labview, Real-Time PCI eXtensions for Instrumentation (PXI) target, and the FPGA, and was applied to generator testing of a 1205-MVA thermal power unit. Its synchronous machine parameters were also derived using the recorded rotor angle.]]>3326056161579<![CDATA[Analytic Model for Induction Motors Under Localized Bearing Faults]]>3326176261198<![CDATA[Sequences Domain Impedance Modeling of Three-Phase Grid-Connected Converter Using Harmonic Transfer Matrices]]>3326276381251<![CDATA[Coordinated Frequency Control Strategy for an Islanded Microgrid With Demand Side Management Capability]]>3326396512583<![CDATA[Multiobjective Design Optimization Using Dual-Level Response Surface Methodology and Booth's Algorithm for Permanent Magnet Synchronous Generators]]>332652659738<![CDATA[Multiobjective Optimization of a Shell-Like Induction Spherical Motor for a Power-Assisted Wheelchair]]>3326606692388<![CDATA[Feedforward Current References Control for DFIG-Based Wind Turbine to Improve Transient Control Performance During Grid Faults]]>3326706812509<![CDATA[A Novel Dual-Flux-Modulator Coaxial Magnetic Gear for High Torque Capability]]>3326826911124<![CDATA[Multidimensional Reversible Solid Oxide Fuel Cell Modeling for Embedded Applications]]>3326927011642<![CDATA[Reduction of Torque and Voltage Ripple in a Doubly Salient Permanent Magnet Generator]]>3327027156823<![CDATA[Analysis of Low-Frequency Stability in Grid-Tied DFIGs by Nonminimum Phase Zero Identification]]>3327167292419<![CDATA[Optimal Performance Design Guideline of Hybrid Reference Frame Based Dual-Loop Control Strategy for Stand-Alone Single-Phase Inverters]]>$v+ i_{c}$ control strategy). This strategy is able to achieve the purpose of active damping, fast dynamic response, and zero reference tracking error. However, due to the inherent characteristics of SRF-based voltage loop and the digital control delay, the performance of the system is degraded and the control parameter design of the HRF-based $v+ i_{c}$ control strategy shows great difficulties. To overcome these shortcomings, in this paper, a systematic parameter design guideline for the HRF-based $v+ i_{c}$ control strategy is proposed to ensure the system stability and optimize the performance of the system under control delay condition. The mathematic model of the HRF-based $v+ i_{c}$ control strategy is established with the consideration of control delay in this paper. Based on this model, a satisfactory region of the system stability indexes can be obtained by stability specifications of the system, and the optimal control parameters can be calculated according to the stability indexes selected from the satisfactory region. By using this method, the system stability and robustness can be guaranteed. Finally, the experimental results are presented to validate the effectiveness of the presented optimal control parameter design methodologies.]]>3327307402181<![CDATA[Sequence Domain SISO Equivalent Models of a Grid-Tied Voltage Source Converter System for Small-Signal Stability Analysis]]>$dq$ impedance model of a grid-tied voltage source converter system into its sequence domain single-input and single-output (SISO) equivalents. As a result, two types of SISO impedance models were derived, one of which was derived from relatively strong and $dq$ symmetric grid assumption (reduced SISO model) and the other was based on closed-loop equivalent (accurate SISO model). It was proven that the accurate SISO model has the same marginal stability condition as the MIMO model. Accuracy of these models is assessed with respect to the measured impedances in PSCAD/EMTDC simulations, their effects on stability are analyzed as well. Findings show that the accurate SISO model presents identical stability conclusions as the MIMO model. However, the reduced SISO model may lead to inaccurate results if the system is highly ${rm{dq}}$ asymmetric, e.g., VSC with fast phase-locked loop or an actively controlled grid.]]>3327417491282<![CDATA[A Virtual Synchronous Generator Control Strategy for VSC-MTDC Systems]]> $V^2-P-omega$ characteristic is developed based on the $V^2-P$ droop control to emulate the action of the speed governor when the frequency of ac grid deviates from the nominal value. The virtual inertia part is used to emulate the inertia response of the synchronous generator. The communication between VSC stations is unnecessary with the autonomous power allocation ability of the $V^2-P-omega$ characteristic. Modal analysis is utilized to test the system stability and optimize the controller parameters. Two test systems which include offshore wind farms, VSC-MTDC systems, and onshore power grids are built in the DIgSIENT/PowerFactory. The simulation results verify the effectiveness of the proposed VSG strategy.]]>3327507611387<![CDATA[A New Configuration of Dual Stator Induction Generator Employing Series and Shunt Capacitors]]>3327627721304<![CDATA[Synthetic Inertia Control Strategy for Doubly Fed Induction Generator Wind Turbine Generators Using Lithium-Ion Supercapacitors]]>3327737831317<![CDATA[A Parameterized Linear Magnetic Equivalent Circuit for Analysis and Design of Radial Flux Magnetic Gears—Part I: Implementation]]>332784791712<![CDATA[A Parameterized Linear Magnetic Equivalent Circuit for Analysis and Design of Radial Flux Magnetic Gears–Part II: Evaluation]]>332792800914<![CDATA[Mitigation of DC and Harmonic Currents Generated by Voltage Measurement Errors and Grid Voltage Distortions in Transformerless Grid-Connected Inverters]]>d-q ) reference frame and composed of a proportional resonant (PR) controller and a repetitive controller (RC). The role of the RC is to regulate the grid current follow the reference value as well as compensate all $6{rm{n}}omega _{{rm{s}}}$ and $(6{rm{n}}pm 2)omega_{{rm{s}}},(n= 1,,2,,3,ldots)$ harmonic components caused by distorted grid voltage and scaling errors. Meanwhile, the PR controller helps to compensate the dc current generated by dc offset measurement errors to guarantee that the three-phase grid currents are balanced and sinusoidal with extremely low dc component. Since the RC employed in the proposed current controller reduces to time delay by four times compared to the conventional RC, the proposed control system ensures good steady-state performance of the grid current without deteriorating its fast dynamic response. The effectiveness of the suggested solution is verified by various experimental tests.]]>3328018131458<![CDATA[A Method to Directly Compute Synchronverter Parameters for Desired Dynamic Response]]>3328148254066<![CDATA[E-Core Hybrid Reluctance Motor With Permanent Magnets Inside Stator Common Poles]]>3328268331435<![CDATA[A Novel PI-Type Sliding Surface for PMSG-Based Wind Turbine With Improved Transient Performance]]>3328348441024<![CDATA[Investigation of Short Permanent Magnet and Stator Flux Bridge Effects on Cogging Torque Mitigation in FSPM Machines]]>3328458551389<![CDATA[Variable Utilization-Level Scheme for Load-Sharing Control of Wind Farm]]>3328568681742<![CDATA[Stray Load and Iron Losses in Small Induction Machines Under Variable Operating Frequency and Flux: A Simple Estimation Method]]>3328698761535<![CDATA[Analysis of Self-Excited PM-Assisted Reluctance Generators]]>$dq$ reference frame is developed to identify the steady-state performance of the self-excited PMAREL generator. Experimental results using a laboratory PMAREL machine are compared to the predicted results. The characteristics of the self-excited PMAREL generator are presented, based on the experimental results. The effects of design parameters (including stator resistances, $d$-axis inductance, and $q$-axis inductance) on the generator performance are investigated by using the analytical model. The performance comparisons with a self-excited reluctance generator are also carried out. It is verified that the self-excited PMAREL generator exhibits not only the improvement in terminal voltage, output power, and power factor but also achieves inherently a stable self-excitation process.]]>3328778851337<![CDATA[Multiagent System Based Microgrid Energy Management via Asynchronous Consensus ADMM]]>332886888304<![CDATA[Simplified Model to Study the Induction Generator Effect of the Subsynchronous Resonance Phenomenon]]>332889892401<![CDATA[Active Current Sharing Control Method for Rotating Thyristor Rectifiers on Brushless Dual-Star Exciters]]>3328938962484<![CDATA[Robust Rotor-Current Sensorless Control of Doubly Fed Induction Generators]]>332897899344<![CDATA[Improved Algebraic-Loop Relaxation in CPVBR Models of Synchronous Machines Under Power Electronic Switching]]>RL interfacing circuit is achieved using a low-pass filter (LPF) approximation that relaxes an algebraic-loop making the model explicit. However, in machine-converter systems, the ac currents and voltages contain harmonics due to switching, which necessitates the use of stiff poles in the LPF resulting in slow simulations. This letter proposes using a band-pass filter (BPF) that may be tuned depending on the switching harmonics of interest. The proposed hybrid LPF–BPF method allows the use of nonstiff poles and reduces the computational burden without compromising numerical accuracy as opposed to the conventional method.]]>332900903697<![CDATA[Scholarship Plus Initiative]]>332904904632<![CDATA[Information for Authors]]>332C3C353