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46th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Gandomi, Amin Ashraf Parsa, Leila Univ Calif Santa Cruz Jack Baskin Sch Engn Santa Cruz CA 95064 USA

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154145

In this paper, an input-series output-parallel isolated DC-DC converter is proposed for MVDC applications. This structure is based on 5-level modified T-type converter in both primary and secondary sides of high frequency transformer. By using a 5-level converter, better voltage and current waveforms can be obtained in the primary and secondary sides of the transformer which will decrease the filter size. Medium-voltage silicon carbide MOSFETs are used as switches. The proposed structure is modular and uses the same submodules in higher and lower voltage sides. The operation of the proposed structure is verified by simulations carried in PLECS.

关键词： input-series output-parallel modular converter T-type converter PDPWM SiC MOSFETs

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Hardware and control design considerations for a mobile 1 MW input-series output-parallel (ISOP) DC-DC converter in Medium Voltage range 13

Hardware and control design considerations for a mobile 1 MW...

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13th IEEE Energy Conversion Congress and Exposition (IEEE ECCE)

作者： Tatusch, David Gorodnichev, Anton Haake, Daniel Schnabel, Fabian Friebe, Jens Jung, Marco Leibniz Univ Hannover Inst Drive Syst & Power Elect Hannover Germany Fraunhofer Inst Energy Econ & Energy Syst Technol Converters & Drive Technol Kassel Germany Univ Appl Sci Bonn Rhein Sieg St Augustin Germany

ISBN: (纸本)9781728151359

In this paper hardware and control design considerations for a mobile 1 MW DC-DC converter in Medium Voltage range are presented. The final application will be the supply of electrified agricultural machinery via an autonomous cable drum with power from the MV grid in combination with local renewables like solar, wind or biomass. After rectification from the grid, the 8 kV medium DC voltage allows to efficiently transmit electrical power with reduced cable size. The developed converter converts the 8 kV to 700 V on site. To decrease passive component size, high switching frequency of 50 kHz is achieved with the application of newly developed 3.3 kV SiC devices. A scaled prototype with one fifth current and voltage rating is constructed to demonstrate the feasability of the hardware and control concept.

关键词： SiC input-series output-parallel Medium Voltage DC-DC converter

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Multi-objective Optimization Control for input-series output-parallel Dual-Active-Bridge DC-DC Converter in EER Application 9

Multi-objective Optimization Control for Input-Series Output...

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IEEE 9th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

作者： Zhou, Bingkai Yang, Xiaofeng Nong, Renbiao Li, Zejie Zheng, Trillion Q. Kobrle, Pavel Beijing Jiaotong Univ Sch Elect Engn Beijing Peoples R China Czech Tech Univ Fac Elect Engn Prague Czech Republic

ISBN: (纸本)9781728153018

For reducing backflow power and improving dynamic performance of the input-series output-parallel dual-active-bridge (ISOP-DAB) converter in the electric energy router application, a hybrid control strategy based on the extended-phase-shift (EPS) output voltage model predictive control and gradient descent algorithm (MPC-GDA) is proposed. Firstly, the backflow power models under single-phase-shift (SPS) and EPS control are established, and the output voltage state space averaging equation under EPS control is also derived. Then the output voltage model predictive control is obtained, and the gradient descent algorithm for backflow power optimization is proposed. Finally, the overall control block diagram of the ISOP-DAB based on MPC-GDA control is derived. The simulation models of ISOP-DAB under MPC-GDA and SPS control are built and compared. It is verified that the MPC-GDA control shows better dynamic response and backflow power optimization compared with the traditional SPS control.

关键词： dual-active-bridge input-series output-parallel backflow power model predictive control gradient descent algorithm

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A Stability Analysis Method for input-series output-parallel DC-DC Converter System 9

A Stability Analysis Method for Input-Series Output-Parallel...

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IEEE 9th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

作者： Song, Lei Liu, Peng Duan, Shanxu Liu, Xiaokui Huazhong Univ Sci & Technol Sch Elect & Elect Engn State Key Lab Adv Electromagnet Engn & Technol Wuhan Peoples R China

ISBN: (纸本)9781728153018

In the series-parallel system, it is critical to ensure the stability of the system. However, stability analysis of the system is not as easy as it is in single module especially when the number of the system comes to 3 or even lager. This paper focus on the stability of input-series output-parallel (ISOP) DC-DC converter system, builds the coupling model of n modules and provides the expressions of Routh criterion for n modules. Following, take 4 modules of three-level full-bridge converters as an example to derive its stable range of the parameters of controllers and then the result is verified by the simulation in Matlab. The stability analysis method and the stable range of controller parameters can be a good guidance for the design of PI controllers.

关键词： input-series output-parallel stability analysis PI control three-level full-bridge converters

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A Novel Wireless Control Strategy for input-series output-parallel Inverter System 9

A Novel Wireless Control Strategy for Input-Series Output-Pa...

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2017 9th Annual IEEE Energy Conversion Congress & Exposition (ECCE)

作者： Jiang, Xiaojian Cao, Xiaopeng Shu, Liangcai Ning, Guangfu Chen, Wu Southeast Univ Sch Elect Engn Ctr Adv Power Convers Technol & Equipment Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781509029983

In this paper, a wireless modular control strategy for input-series output-parallel (ISOP) inverter system is proposed to ensure equal sharing of input voltage and output current among the constituent inverters. Compared with existing control strategies for the ISOP inverter system, such as centralized control which restricts the modularity of the system and distributed control which realizes voltage and current sharing by means of connecting constituent inverter modules with several sharing buses susceptible to interference and reduces the reliability of the system, the proposed control strategy based on positive output-voltage-amplitude gradient can achieve fully modular design of the ISOP inverter system. Firstly, the control strategy is deduced according to the droop method, and the principle of the control strategy is analyzed in detail. Then the stability and design of the proposed strategy are also explored. At last, a two-module ISOP inverter system is tested in the laboratory and the experimental results verify the effectiveness of the proposed control strategy.

关键词： input-series output-parallel inverter wireless positive output-voltage-amplitude gradient stability

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input-series output-parallel Multiple output Converter

Input-Series Output-Parallel Multiple Output Converter

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29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

作者： Ren, Xiaoyong Zhang, Qiang Pang, Zhenjin Chen, Qianhong Ruan, Xinbo Nanjing Univ Aeronaut & Astronaut Coll Automat Engn Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781479923250

With computers and servers becoming increasingly widespread, a growing amount of public attention has been focused on improving the efficiency of the server power supply. In this paper, the high-voltage bus converter in the present architecture of the server power supplies is replaced by the multiple output converter to improve the efficiency as there are a variety of loads. Aimed at improving the efficiency, several kinds of multiple output converters are compared and an input-series output-parallel multiple output converter composed of a DCX and a dc-dc converter is put forward. The operation principle of the converter is analyzed, the proper circuit topology is chosen and the control strategy is proposed. The equivalent circuit of the chosen DCX circuit topology is analyzed, based on which, the parameters of the converter are designed according to a white gold server power supply. Finally, a 500 W prototype is built based on the Freescale singlechip MC56F8257, and the experimental waveforms and the tested efficiency curve are given to verify the feasibility of this input-series output-parallel multiple output converter.

关键词： Multiple output input-series output-parallel high efficiency DCX plus dc-dc

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Power Sharing Control Strategy of ISOP LLC-DAB Hybrid Bidirectional Converters Based on Multiagent Consensus Theory

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2025年

作者： Liao, Yuefeng Yang, Zhenkun Yang, Duo Li, Xiang Xu, Guo Liang, Jing Zhengzhou Univ Sch Elect & Informat Engn Zhengzhou 450001 Peoples R China State Key Lab Intelligent Agr Power Equipment Luoyang 471039 Peoples R China Cent South Univ Sch Automat Changsha 410083 Peoples R China

In applications such as dc microgrids and energy storage systems that are characterized by high power and input voltage, input-series output-parallel (ISOP) dc-dc bidirectional converters are widely adopted to intermediate power conversion. The LLC-DAB hybrid bidirectional converter is a single-stage converter, which is composed of LLC resonant circuit and dual active bridge (DAB) circuit. It combines the advantages of LLC and DAB, making it highly suitable for use as a submodule (SM). However, differences in input impedance among these SMs can lead to power imbalance during operation, affecting the performance of the system. To address this problem, a novel power sharing control strategy based on multiagent consensus theory is proposed in this article. This method treats each SM as an agent. By exchanging information with its neighbors, each SM can regulate its power in real- time to achieve power sharing. Additionally, an adaptive dynamic compensator is proposed to compensate for control processes in real-time, thereby reducing settling time of the system. Compared to traditional power sharing strategies, the proposed method not only ensures power sharing among SMs but also improves the dynamic performance of the system. Finally, the effectiveness of the proposed method is demonstrated through an experimental prototype.

关键词： Topology Switches Voltage control Laplace equations Hybrid power systems Transformers Information exchange Consensus algorithm Steady-state Real-time systems Consensus theory input-series output-parallel power sharing control

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Configuration Optimization of Dual Active Bridge Converter Systems for Interfacing Large-Scale Water Electrolyzer with Stand-Alone Renewables 13

Configuration Optimization of Dual Active Bridge Converter S...

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13th International Conference on Renewable Energy Research and Applications

作者： Runser, Thibaut Arend, Sebastian Karsten, Tim Bach, Amandus De Doncker, Rik W. Siemens Energy Erlangen Germany Reverion Eresing Germany Rhein Westfal TH Aachen Inst Power Generat & Storage Syst E ON Energy Res Ctr Aachen Germany

ISBN: (纸本)9798350375596;9798350375589

This paper explores Dual Active Bridge Converter System (DABCS) configurations for interfacing a water electrolyzer in the MW range with a medium voltage direct current bus powered by stand-alone renewable power sources. The number of submodules in the DABCS varies based on the voltage and current ratings of the Insulated-Gate Bipolar Transistor (IGBT) employed. The results show that configurations with a high submodule count, enabled by low-voltage IGBT modules, exhibit superior semiconductor efficiency. However, this advantage is offset by a decrease in Medium Frequency Transformer (MFT) efficiency with an increasing number of submodules. A Pareto optimization analysis of DABCS efficiency versus power density is employed to reveal the most suitable trade-off.

关键词： Dual active bridge converter system input-series output-parallel megawatt power electronic systems Pareto optimization water electrolyzer

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Second Harmonic Ripple Voltage Suppression for Single-Phase ISOP Solid-State Transformer by Active Power Decoupling 38

Second Harmonic Ripple Voltage Suppression for Single-Phase ...

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IEEE Applied Power Electronics Conference and Exposition (APEC)

作者： Wei, Tianyu Cervone, Andrea Dujic, Drazen Ecole Polytech Fed Lausanne EPFL Power Elect Lab Lausanne Switzerland

ISBN: (纸本)9781665475396

The solid-state transformers with input-series output-parallel structure are considered for various applications where MVAC to LVDC conversion is needed. However, due to the inherent second harmonic pulsating power in the single-phase AC system, large DC link capacitors are required to smooth the voltage ripple of all floating cells, which reduces achievable power density. The active power decoupling method can shift away the pulsating power from the DC link capacitors, leading to a significant reduction to the DC link capacitance and resulting voltage ripple. So far, the application of active power decoupling is limited to single-level converters, and little research on the impact in modular converters has been done. This paper investigates the feasibility of applying active power decoupling to solid-state transformers. The active power filter with dc-split-capacitor circuit is selected to minimize the DC link capacitance. Simulation results show that the active power filter can significantly reduce the second harmonic voltage ripple and the total DC link capacitance of the SST. A prototype of the active power filter has been built and tested to verify the design.

关键词： active power decupling active power filter solid-state transformer input-series output-parallel second harmonic ripple voltage suppression

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Multi-Module DC-DC Converter-based Fast Chargers for Neighborhood Electric Vehicles 11

Multi-Module DC-DC Converter-based Fast Chargers for Neighbo...

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11th IEEE Symposium on Computer Applications and Industrial Electronics (ISCAIE)

作者： ElMenshawy, Mena Massoud, Ahmed Qatar Univ Dept Elect Engn Doha Qatar

ISBN: (纸本)9781665403382

To allow a wide adoption of Neighborhood Electric Vehicles (NEVs), low-speed EVs, the EV battery's fast recharging is necessary. This will further increase the utilization of EVs due to the reduced charging duration. To achieve fast recharging, several studies have introduced advanced power electronics technologies to allow wider acceptance for EVs by the public. Among these power electronics conversion systems, the DC-DC conversion stage plays an essential role in supplying energy to the EV via charging the EV's battery. Accordingly, in this paper, a multi-module input-series output-parallel (ISOP) DC-DC converter is presented for NEVs. The multi-module ISOP DC-DC converter is Dual Active Bridge (DAB) based topology. Unlike the conventional ISOP DC-DC converter, only one H-bridge is employed at the input side, while the intermediate high-frequency transformer and the H-bridge employed at the output side are of modular structure. Since only one bridge with a single capacitor is used at the input side, the power balance between the employed DAB units is accomplished via direct output current sharing, where stability is ensured without using the input voltage sharing control approach. Two Matlab/Simulink model is presented to verify the presented concept using reflex charging algorithm, where the first model uses the small-signal model to present the behavior of the converter under transient condition, while the other Matlab/Simulink model is time-domain based simulation. The controller is tested using three DAB units with parameter mismatch where each unit is rated at 1.5 kW to achieve an overall power of 4.5 kW.

关键词： input-series output-parallel Dual Active Bridge Fast Charging Reflex/Burp Charging output Current Sharing input Voltage Sharing

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