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Active Damping Control and Parameter Design Method for ISOP-Based Load Converter in DC Distribution System

ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2023年第1期11卷 465-477页

作者： Chen, Pengwei Jiang, Wenwei Ruan, Xinbo Zhao, Peipei Li, Huan Nanjing Univ Aeronaut & Astronaut Coll Automat Engn Jiangsu Key Lab New Energy Generat & Power Convers Nanjing 211106 Peoples R China China Southern Power Grid Elect Power Res Inst State Key Lab HVDC Guangzhou 510663 Peoples R China

To meet the diversified requirements of active damping configuration in a dc distribution system, the input-series-output-parallel (ISOP) load converter based on phase-shifted full-bridge (PSFB) modules is investigated in this article. The reduced-order impedance model of the PSFB-based ISOP converter with common-duty-ratio control is established first, and then the active damping control strategies using the primary- and secondary-side voltages are proposed, respectively. By reformulating the stability criterion in the form of impedance-frequency curves and using the impedance sensitivity, the sensitivity of resonance frequency is derived to develop a method for designing the parameters of active compensators. Finally, the experimental results demonstrate the effectiveness of the proposed active damping control strategies and parameter design method.

关键词： Damping Impedance Equivalent circuits Sensitivity Load modeling Voltage control Integrated circuit modeling Active damping criterion reformulation impedance modeling input-series output-parallel (ISOP) converter sensitivity

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Computer-Aided Time-Domain Operation and Design Optimization of Resonant Converters

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2023年第4期11卷 4164-4177页

作者： Xiao, Ziheng Li, Zongjian He, Zhixing Wang, Hongliang Tang, Yi Luo, An Hunan Univ Coll Elect & Informat Engn Changsha 410082 Peoples R China Nanyang Technol Univ Energy Res Inst Singapore 639798 Singapore Nanyang Technol Univ Sch Elect & Elect Engn Singapore 639798 Singapore

This article presents a method for computer-aided operation and design optimization of resonant converters using time-domain analysis. Resonant converters can operate in different operation stage trajectories (OSTs) with the change of two degrees of freedom (2DOFs), namely, switching frequency $f_{\mathrm {s}}$ and duty ratio $d$ . This article calculates and analyzes the operation characteristics, zero-voltage switching-ON (ZVS-ON) region, and zero-current switching-OFF (ZCS-OFF) region when the 2DOFs vary by solving the OST differential equation sets. Based on this analysis, an algorithm is proposed to find the operation and design optimizations of a specific resonant converter while considering 2DOFs by traversing all possible control coordinates. This article provides several case studies to demonstrate the design tradeoffs in different scenarios, which are verified through experimental verifications.

关键词： Optimization Equivalent circuits Design optimization Time-domain analysis resonant converter time-domain stage trajectory analysis

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Utilizing IGBT Modules in the Active Region for a High-Precision Pulsed Current Supply of Magnets

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2023年第5期11卷 4982-4988页

作者： Wei, Wenqi Zhang, Shaozhe Jiang, Tao Fan, Junxian Han, Xiaotao Huazhong Univ Sci & Technol Wuhan Natl High Magnet Field Ctr Wuhan 430074 Peoples R China

A high-power and high-precision pulsed current supply of magnets was developed by using insulated-gate bipolar transistor (IGBT) modules in the active region. First, two basic circuit topologies including the series structure and parallel structure were compared in detail. With a wider current range, higher power efficiency, and reliability, the series structure was suitable for the application requirements. Thereafter, a new cascade feedback scheme in the IGBT driver was proposed to weaken the nonlinearity and time-varying of the system, and improve its dynamic responses. Accordingly, a fit average model was established based on the measured Bode diagrams of the quasi-linearization system. The control strategies of feedforward and feedback were both adopted to realize the high-precision and high-bandwidth current supply. Finally, the proposed current supply was experimentally verified and can meet the demands of the application with a pulsed output current of 200 A/10 ms and static precision of about 0.02 A.

关键词： Insulated gate bipolar transistors Current supplies Magnetic circuits Topology Switches Logic gates Threshold voltage Active region high-precision insulated-gate bipolar transistor (IGBT) pulsed current supply

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Frequency-Divided Control and Stability Analysis of Single-Phase Three-Level Flying Capacitor Boost Inverter

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2025年第1期13卷 1084-1094页

作者： Yu, Biyang Han, Hua Sun, Yao Xie, Shiming Ha, Lifang Liu, Yonglu Su, Mei Cent South Univ Natl Engn Res Ctr Adv Energy Storage Mat Sch Automat Hunan Prov Key Lab Power Elect Equipment & Grid Changsha 410083 Peoples R China

The single-phase three-level flying capacitor (TLFC) boost inverter is a power converter with active power decoupling without requiring additional components. However, it has the characteristic that the number of control degrees of freedom is fewer than the number of control targets, which poses a challenge to controller design. To address this issue, this article proposes a frequency-divided control method for the TLFC boost inverter. According to the frequency-divided idea, the decoupling control input of the system is divided into a dc component and an ac component design. The dc component regulates the flying capacitor's average voltage, and the ac component suppresses the dc bus voltage's pulsation. The proposed method can effectively suppress the double-line-frequency ripple in both the input current and the bus voltage and exhibit high robustness. Furthermore, considering that the TLFC boost inverter is a nonlinear periodic time-varying system, a single-input single-output (SISO) admittance model is developed to analyze the system's stability under the proposed control method. Finally, a 1.5-kW hardware prototype is built to validate the effectiveness of the proposed control method and stability analysis.

关键词： Inverters Capacitors Voltage control Stability analysis circuits Frequency control Switches Steady-state Integrated circuit modeling Analytical models Flying capacitor multilevel frequency-divided control power decoupling single-phase inverter stability analysis

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Research on Single-Phase Three-Level Pseudo Totem-Pole Rectifiers With a Unified Pulsewidth Modulation

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2023年第5期11卷 5052-5061页

作者： Ma, Hui Pan, Yu Lu, Yun Chen, Xi Huang, Yuehua China Three Gorges Univ Coll Elect Engn & New Energy Yicang 443002 Peoples R China

In this article, a family of single-phase three-level pseudo totem-pole rectifiers (STPTRs) is proposed. Compared with the conventional diode-clamped three-level converter, the number of semiconductors in the proposed rectifiers is reduced, contributing to lower conduction losses. The proposed STPTRs employ the dual-inductor branch bridge arms working in conjunction with each other to provide a path for the input current, which means that it may reduce the current flowing through the inductors effectively. The characteristics of a selected novel rectifier topology, including its principles of operation, key waveform, and a power circuit design-related analysis, are presented. Meanwhile, the mathematical models between the voltage-level characteristics of the bridge arm to ground and the switching pulse distribution are derived, and a unified pulsewidth modulation for this family of STPTRs is presented. The double-layer carrier modulation technique with unified interval judgment condition can be transplanted to different topologies with the same switching devices. Finally, a 220-V/1-kW laboratory prototype is built to validate the feasibility of the proposed power factor correction (PFC) rectifiers.

关键词： Switches Topology Voltage Rectifiers Capacitors Inductors Bridge circuits Pseudo totem-pole topology three-level rectifier unified modulation

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Flux-Rate-Controlled Adjustable Inductor for DC-DC Converter and Dynamic Load Impedance Variation Applications

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2024年第6期12卷 5943-5954页

作者： Mahapatra, Ruman Kalyan Umanand, L. Gopakumar, K. Indian Inst Sci DESE Bangalore 560012 Karnataka India

This work proposes a specific approach to regulate the inductance value smoothly using a flux-rate-controlled adjustable inductor. The proposed adjustable inductor comprises a commercially available three-limb core, two windings, and a control switch, which gives a low-cost solution. The control switch is realized using a bidirectional switch or a variable resistance. The duty ratio or the variable resistance value controls the flux-rate to adjust the inductance value. The proposed adjustable inductor is modeled using the widely used bond-graph technique to perform the simulation study. The working of the adjustable inductor is validated through several applications explained in this work. The experimentation for the dc load impedance variation application is conducted using a laboratory-built prototype considering both methods of flux-rate control. The inductance values obtained from the experiments follow the simulation study's calculated values. The ac load variation experimentation is performed at 500 Hz to observe the change in phase angle due to the inductance variation. This work integrates the proposed adjustable inductor with dc-dc converters to enhance the continuous conduction mode (CCM)-discontinuous conduction mode (DCM) regions. A basic PI controller performs the closed-loop control of the SiC-based synchronous buck and boost converters to validate the system stability during inductance variation.

关键词： Inductors Inductance Magnetic circuits Switches Magnetic cores Permeability Air gaps Adjustable inductor bond graph continuous conduction mode (CCM)-discontinuous conduction mode (DCM) flux-rate load variation magnetic circuit SiC-based synchronous boost synchronous buck

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A DC Solid-State Transformer With DC Fault Ride-Through Capability

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2022年第4期10卷 3617-3630页

作者： Weng, Haoyuan Li, Jinghang Shi, Keyan Chen, Min Krein, Philip T. Xu, Dehong Zhejiang Univ Coll Elect Engn Inst Power Elect Hangzhou 310027 Peoples R China

This article investigates a dc solid-state transformer (DCSST) with dc fault ride-through (FRT) capability for medium-voltage dc (MVDC) systems. The FRT requirement for DCSST in dc grid is investigated. Short-circuit fault clearance on the medium-voltage (MV) side is realized by introducing full-bridge converters with cascaded dc converter modules on the MV side of the DCSST. The FRT strategy under typical voltage sags is analyzed. Factors affecting the fault clearing and system recovery are considered, including the number of full-bridge converters, the values of dc inductance, and the dc-link bus voltage. The concept is verified with both simulations and experiments.

关键词： Circuit faults Fault currents Circuit breakers Power system stability Bridge circuits Thyristors Fault current limiters DC fault ride-through (FRT) dc solid-state transformer medium-voltage dc (MVDC) system short-circuit fault

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Multiport Energy Router for DC Grid Clusters

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2024年第2期12卷 1666-1682页

作者： Sun, Linfeng Jiang, Wei Hashimoto, Seiji Lin, Zhengyu Kawaguchi, Takahiro Gunma Univ Div Elect & Informat Kiryu 3768515 Japan Yangzhou Univ Dept Elect Engn Yangzhou 225127 Peoples R China Loughborough Univ Wolfson Sch Mech Elect & Mfg Engn Loughborough LE11 3TT England

The dc micro-grid has emerged as an increasingly popular solution for localized energy integration and dispatching. With multiple dc micro-grids in a system, an effective dc tie can facilitate various generation, storage, and consumption modes. It enhances energy versatility and contributes to improved energy resiliency. Hence, this article introduces the concept of a multiport energy router (MER) that aims to multiplex dc power across various dc communities all with close-margin bus voltages. The proposed MER functions as a "super node" following Kirchhoff's current law (KCL). It incorporates a unique partial power topology, enabling direct control of dc current flow between any two buses or toward local energy storage, solely based on bus voltage differences. To align modulation and control with industrial standard frameworks and provide flexibility in controlling energy storage current, a multidimension space vector modulation method is proposed. The instantaneous power theory is redefined for the dc energy router's operation. The power transfer efficiency of the standard half-bridge partial power topology is empirically verified through rigorous testing. Various operational scenarios are examined to demonstrate the feasibility of the MER concept, with findings supported by both simulation and experimental data.

关键词： Topology Integrated circuits Standards Power electronics Power conversion Modulation Load flow DC micro-grid energy router modified p-q theory multiport converter (MPC) partial power conversion static 3-D space vector modulation

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Kent Mapping-Based Chaotic Frequency Modulation for Conducted Common-Mode EMI Suppression in IPOS Dual Active Bridge Converters

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ieee journal OF emerging AND selected topics IN POWER ELECTRONICS 2025年第2期13卷 1528-1541页

作者： Zhang, Chong Ding, Xiaogang Zhou, Yu Yu, Samson Shenglong Yu, Dongsheng China Univ Min & Technol Sch Elect Engn Xuzhou 221116 Peoples R China Deakin Univ Sch Engn Melbourne Vic 3125 Australia

With advancements in wide bandgap devices and electromagnetic materials, dual active bridge (DAB) converters are widely used, offering benefits such as increased power density and reduced filter requirements. However, their high frequency can compromise electromagnetic interference (EMI) performance. In this article, we propose a novel Kent mapping-based frequency modulation method to address this issue. It facilitates chaotic variable switching frequency modulation (C-VSFM), effectively suppressing conducted common-mode (CM) EMI in input-parallel-output-series (IPOS) DAB converters. This method reduces noise spikes in the conducted EMI spectrum, easing the demands for EMI filter design. We derive voltage spectra and real-time frequency variation ranges under C-VSFM conditions. Through experimentation, the efficacy of the proposed scheme is verified, which can effectively suppress conducted CM EMI across the test frequency band. Finally, we compare different frequency limits and draw conclusions on reducing conducted EMI effects. This analysis can aid in understanding and mitigating EMI challenges in DAB converters, offering insights for future applications.

关键词： Electromagnetic interference Modulation Switches Zero voltage switching Voltage Passive filters Bridge circuits Chaotic variable switching common-mode (CM) electromagnetic interference (EMI) dual active bridge (DAB) converters frequency modulation

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Equivalence Checking of Quantum circuits With the ZX-Calculus

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ieee journal on emerging and selected topics in circuits and systems 2022年第3期12卷 662-675页

作者： Peham, Tom Burgholzer, Lukas Wille, Robert Tech Univ Munich Chair Design Automat D-80333 Munich Germany Johannes Kepler Univ Linz Inst Integrated Circuits A-4040 Linz Austria Software Competence Ctr Hagenberg GmbH SCCH A-4232 Hagenberg Austria

As state-of-the-art quantum computers are capable of running increasingly complex algorithms, the need for automated methods to design and test potential applications rises. Equivalence checking of quantum circuits is an important, yet hardly automated, task in the development of the quantum software stack. Recently, new methods have been proposed that tackle this problem from widely different perspectives. One of them is based on the ZX-calculus, a graphical rewriting system for quantum computing. However, the power and capability of this equivalence checking method has barely been explored. The aim of this work is to evaluate the ZX-calculus as a tool for equivalence checking of quantum circuits. To this end, it is demonstrated how the ZX-calculus based approach for equivalence checking can be expanded in order to verify the results of compilation flows and optimizations on quantum circuits. It is also shown that the ZX-calculus based method is not complete-especially for quantum circuits with ancillary qubits. In order to properly evaluate the proposed method, we conduct a detailed case study by comparing it to two other state-of-the-art methods for equivalence checking: one based on path-sums and another based on decision diagrams. The proposed methods have been integrated into the publicly available QCEC tool (https://***/cda-tum/qcec) which is part of the Munich Quantum Toolkit (MQT).

关键词： Qubit Quantum circuit Quantum computing Logic gates Computers Optimization Hardware Quantum computing formal verification quantum circuit

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