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IEEE Power Electronics Society
Year: 2018 | Volume: 33 | Issue: 12
Dual Receiver Coils Wireless Power Transfer System With Interleaving Switching
Kye-Seok Yoon;Sang-Han Lee;In-Kui Cho;Ho-Jin Lee;Gyu-Hyeong Cho
Publication Year: 2018,Page(s):10016 - 10020
Cited by: Papers (15)
This letter presents a wireless power transfer (WPT) system for wristband device charging. By using dual receiver coils with power switches in an interleaved manner, the proposed WPT system can simultaneously operate to accumulate energy from the primary coil and transfer the previously accumulated energy to the battery in each coil. As a result, the WPT efficiency can be increased with the small ...Show More
Three-Port-Converter-Based Single-Phase Bidirectional AC–DC Converter With Reduced Power Processing Stages and Improved Overall Efficiency
Publication Year: 2018,Page(s):10021 - 10026
Cited by: Papers (41)
Single-phase bidirectional ac–dc converters based on a three-port converter (TPC) are proposed for energy storage applications. Three power interfacing ports, i.e., a dc-bus port, a dc input port, and an ac port, are provided by the proposed converter. A battery, whose voltage is lower than the peak amplitude of the ac voltage, is connected to the dc input port of the TPC, with which energy exchan...Show More
Power Semiconductor Module With Low-Permittivity Material to Reduce Common-Mode Electromagnetic Interference
Publication Year: 2018,Page(s):10027 - 10031
Cited by: Papers (26)
The layout of a low-permittivity material is designed in a power semiconductor module to reduce parasitic common-mode (CM) capacitance and hence attenuate the CM current. Without sacrificing the thermal performance between the semiconductor devices and heat sink, a portion of the bottom copper of a direct-bond-copper substrate is replaced by air to decrease capacitance. The proposed power module i...Show More
Control and Operating Range Analysis of an AC-Stacked PV Inverter Architecture Integrated With a Battery
Publication Year: 2018,Page(s):10032 - 10037
Cited by: Papers (20)
This letter presents a control scheme to operate a battery-integrated ac-stacked photovoltaic (PV) inverter architecture and its operating range analysis. The main operation strategy is the combination of decentralized controls of individual inverter members; PV and battery. In ac-series integration, battery charging and discharging operations affect operating margins of the PV inverter members. T...Show More
Accurate Operating Analysis of Boundary Mode Totem-Pole Boost PFC Converter Considering the Reverse Recovery of mosfet
Publication Year: 2018,Page(s):10038 - 10043
Cited by: Papers (21)
The boundary conduction mode (BCM) totem-pole boost power factor correction (PFC) topology is becoming popular in high-efficiency and high power density applications because of its advantages of fewer devices and low conduction losses. The ideal design methodology for the BCM boost converter ignores the reverse recovery of mosfet s’ body diode and the resonance between the inductance and output ju...Show More
Control Strategy for Dual Three-Phase Machines With Two Open Phases Providing Minimum Loss in the Full Torque Operation Range
Alejandro G. Yepes;Jesús Doval-Gandoy;Fernando Baneira;Hamid A. Toliyat
Publication Year: 2018,Page(s):10044 - 10050
Cited by: Papers (50)
Dual three-phase machines (D3PMs) are particularly attractive due to their fault-tolerance capability. In general, under open-phase (OP) faults, the current references are adapted following a minimum-loss strategy (MLS) or a maximum-torque strategy (MTS). The MLS offers lower copper loss than the MTS for any given torque, but a smaller torque operation range. The full-range MLS (FRMLS) has recentl...Show More
A Fast and Highly Accurate Battery Charger With Accurate Built-In Resistance Detection
Young-Ho Jung;Jae-Hyung Jung;Hoe-Eung Jeong;Jae-Hoon Jung;Jae-Sung An;Hyun-A. Ahn;Seong-Kwan Hong;Oh-Kyong Kwon
Publication Year: 2018,Page(s):10051 - 10054
Cited by: Papers (17)
This letter proposes a fast and highly accurate battery charger for mobile applications. The proposed battery charger accurately detects the built-in resistance (BIR) and determines the transition point from the constant-current (CC) to constant-voltage (CV) modes. It then maximizes and minimizes the durations of the CC and CV modes, respectively, thus reducing the battery charging time. In additi...Show More
Modeling Frequency Independent Hysteresis Effects of Ferrite Core Materials Using Permeance–Capacitance Analogy for System-Level Circuit Simulations
Publication Year: 2018,Page(s):10055 - 10070
Cited by: Papers (20)
Ferrite materials are widely used for magnetic cores in power electronic converters. The hysteresis effect of the material leads to power loss and harmonic distortion. In order to predict the behavior of the magnetic component in the system environment during the design phase, accurate system-level time-domain simulation is desired. This paper proposes an approach to model the frequency-independen...Show More
Dynamic Modular Modeling of Smart Loads Associated With Electric Springs and Control
Publication Year: 2018,Page(s):10071 - 10085
Cited by: Papers (19)
Smart loads associated with electric springs (ES) have been used for fast demand-side management for smart grid. While simplified dynamic ES models have been used for power system simulation, these models do not include the dynamics of the power electronic circuits and control of the ES. This paper presents a dynamic and modular ES model that can incorporate the controller design and the dynamics ...Show More
Impedance Measurement of Traction Network and Electric Train for Stability Analysis in High-Speed Railways
Pengyu Pan;Haitao Hu;Xiaowei Yang;Frede Blaabjerg;Xiongfei Wang;Zhengyou He
Publication Year: 2018,Page(s):10086 - 10100
Cited by: Papers (55)
Instability and oscillation issues have frequently occurred in high-speed railways due to the impedance mismatch versus frequency between the four-quadrant converter (4QC)-based high-speed train and the traction network (hereinafter train–network). However, solely utilizing the mathematical deduction to quantify the impedances seems to be difficult owing to unknown detailed parameters of both trac...Show More
Soft-Switched Nonisolated High Step-Up Three-Port DC–DC Converter for Hybrid Energy Systems
Publication Year: 2018,Page(s):10101 - 10111
Cited by: Papers (120)
In this paper, a nonisolated high step-up three-port converter is proposed which provides two separate power flow paths from each input source to the output load. In order to reduce the number of converter components, some components play multiple roles. Accordingly, the energy storage device is charged with the same components which are used in transferring power to the load. In this converter, t...Show More
Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer
Publication Year: 2018,Page(s):10112 - 10121
Cited by: Papers (71)
The modular smart transformer (ST) is composed by several basic converters rated for lower voltage and power. In this paper, the quadruple active bridge (QAB) is used as the basic block for the modular ST. In this application, the efficiency and cost are the most important design parameters. Therefore, the paper focus on the design of the converter, with the aim to optimize its efficiency, taking ...Show More
Interleaved Operation of Two Neutral-Point-Clamped Inverters With Reduced Circulating Current
Zhi-Xiang Zou;Frederik Hahn;Giampaolo Buticchi;Sandro Günter;Marco Liserre
Publication Year: 2018,Page(s):10122 - 10134
Cited by: Papers (46)
Parallel inverters are commonly adopted in high-power applications, for instance wind energy systems, smart transformers, and power conditioners. Meanwhile, interleaved pulse width modulation is usually considered as an optimal approach to reduce the current ripple and harmonics of the parallel inverters. However, in the case of a common dc link, the problem of circulating current emerges and lead...Show More
An Alternative IPT Pickup Controller for Material Handling Using a Current Doubler
Publication Year: 2018,Page(s):10135 - 10147
Cited by: Papers (8)
Inductive power transfer systems deployed in material handling have traditionally used parallel-tuned (current-sourced) boost regulators to independently control and regulate the load on each secondary. This paper evaluates the current doubler as an alternative parallel-tuned secondary controller within this application to better match the current and voltage requirements in the secondary resonant...Show More
High Power Density Z-Source Resonant Wireless Charger With Line Frequency Sinusoidal Charging
Publication Year: 2018,Page(s):10148 - 10156
Cited by: Papers (14)
Wireless charger for electric vehicles (EVs) is an offline application and it needs power factor correction (PFC) function, which usually consists of a front-end boost PFC and a cascaded dc–dc converter. Z-source resonant converter (ZSRC), a single-stage solution with low cost and high efficiency, was proposed for EV wireless charger lately. The Z-source capacitors in the ZSRC are designed to abso...Show More
Analysis of Resonance Between a VSC-HVDC Converter and the AC Grid
Changyue Zou;Hong Rao;Shukai Xu;Yan Li;Weiwei Li;Jun Chen;Xiaobin Zhao;Yu Yang;Bo Lei
Publication Year: 2018,Page(s):10157 - 10168
Cited by: Papers (267)
A 1270 Hz resonance occurred between ±350 kV/ 1000 MW Luxi back-to-back voltage source converter based high-voltage dc transmission (VSC-HVDC) converter and the 525 kV ac grid after disconnection of several ac transmission lines. To understand the resonance and find a solution, the impedance-based stability analysis model considering different equipment is first established. Then, the resonance is...Show More
Capacitor Voltage Balancing and Current Control of a Five-Level Nested Neutral-Point-Clamped Converter
Publication Year: 2018,Page(s):10169 - 10177
Cited by: Papers (65)
The five-level nested neutral-point-clamped (5L-NNPC) converter is one of the most promising topologies for medium-voltage (2.3–7.2 kV) high-power applications such as medium-voltage drives, wind energy conversion systems, and grid-connected systems. The 5L-NNPC requires a fewer number of switching devices, freewheeling and clamping diodes, and flying capacitors compared to the existing five-level...Show More
Operation and Control Scheme of a Five-Level Hybrid Inverter for Medium-Voltage Motor Drives
Publication Year: 2018,Page(s):10178 - 10187
Cited by: Papers (81)
This paper proposes a control method for a five-level hybrid flying-capacitor (5L-HFC) inverter, of which structure stems from the conventional five-level active neutral-point-clamped (5L-ANPC) topology by dividing the dc-link stage into three series-connected capacitors. In this inverter, the voltage stress on the power switches connected to the dc link is reduced by a half compared with that of ...Show More
Fully ZVS, Minimum RMS Current Operation of the Dual-Active Half-Bridge Converter Using Closed-Loop Three-Degree-of-Freedom Control
Publication Year: 2018,Page(s):10188 - 10199
Cited by: Papers (53)
This paper discusses how duty ratios of the primary and secondary half-bridge legs of a dual-active half-bridge converter can be used in conjunction with phase-shift control to operate the converter with the least possible transformer rms current at a given power. Following introduction of all possible operational modes arising due to such three-degree-of-freedom control, results from a numerical-...Show More
Active Power Oscillation Cancelation With Peak Current Sharing in Parallel Interfacing Converters Under Unbalanced Voltage
Publication Year: 2018,Page(s):10200 - 10214
Cited by: Papers (21)
In a hybrid ac/dc grid, the ac-side unbalance voltage introduces adverse effects on dc grids and interfacing converters (IFC) (active power oscillations, dc-link voltage oscillations, and IFC peak current increase at the same average power production). For parallel IFCs, these adverse effects can be easily aggregated. In this paper, two new control strategies are proposed for parallel IFCs to impr...Show More
Development of a Converter-Based Transmission Line Emulator With Three-Phase Short-Circuit Fault Emulation Capability
Shuoting Zhang;Bo Liu;Sheng Zheng;Yiwei Ma;Fei Wang;Leon M. Tolbert
Publication Year: 2018,Page(s):10215 - 10228
Cited by: Papers (24)
A transmission line emulator has been developed to flexibly represent interconnected ac lines under normal operating conditions in a voltage-source-converter-based power system emulation platform. As the most serious short-circuit fault condition, the three-phase short-circuit fault emulation is essential for power system studies. This paper proposes a model to realize a three-phase short-circuit ...Show More
Modeling, Tuning, and Performance Comparison of Second-Order-Generalized-Integrator-Based FLLs
Saeed Golestan;Josep M. Guerrero;Juan. C. Vasquez;Abdullah M. Abusorrah;Yusuf Al-Turki
Publication Year: 2018,Page(s):10229 - 10239
Cited by: Papers (151)
The second-order-generalized-integrator-based freq-uency-locked loop (SOGI-FLL) is a well-known tool for filtering and synchronization purposes in the power and energy applications. The SOGI-FLL, nevertheless, has a limited ability in rejecting the grid voltage disturbances. To deal with this problem, two advanced SOGI-FLLs have been proposed recently. In the first one, a SOGI-based filter is incl...Show More
Robust Grid Current Control With Impedance-Phase Shaping for LCL-Filtered Inverters in Weak and Distorted Grid
Publication Year: 2018,Page(s):10240 - 10250
Cited by: Papers (51)
For the grid-connected LCL-filtered inverter, the grid current feedback active damping (AD) can assure a desirable bandwidth and a good robustness against certain parameter variations by using a minimal number of sensors. However, the inverter performance was seriously endangered by nonideal conditions at the point of common coupling (PCC), including background voltage distortions and grid impedan...Show More
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