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Recent Research of power electronics and Drives in Hong Kong

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电源世界 2004年第12期 1-7页

作者： K.W.E Cheng N.C.Cheung power electronics Research Centre The Hong Kong Polytechnic University

The research in power electronics and Dives at The Hong Kong Polytechnic University has been undertaking for many years. Recently, a power electronics Research Centre (PERC) has been developed that is contributed towards the research anddevelopment in the area. It encompasses the high frequency power supplies, chaos and bifurcation, soft-switching power converters, electrical machines, high precision motion control, traction and traffic control,alternative energy and electrical building services.

关键词： DC/DC变换器 PERC EMI 电磁兼容性

Control and power electronics technology in renewable energy

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Science China(Technological Sciences) 2008年第6期51卷 702-712页

作者： WU Jie CHEN SiZhe LIU Dan College of Electric power South China University of TechnologyGuangzhou 510640China

As the cut-in point of research on control and power electronics technology used in renewable energy, this paper does not aim to analyze particular theories or tech-nologies in this field, but, instead, is to go back to the fountainhead of the issue to illustrate the essential concepts in this field, which are usually neglected and may become bottle-neck of the research. Research experiences have shown that con-fusion and trouble may be created if researchers do not understand these essential concepts well.

关键词： renewable energy control technology power electronic

Transient of power pulse and its sequence in power electronics

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Science China(Technological Sciences) 2007年第3期50卷 351-360页

作者： ZHAO ZhengMing BAI Hua YUAN LiQiang Department of Electrical Engineering the State Key Laboratory of Power SystemsTsinghua UniversityBeijing 100084China

Various failures and destructions occur in the applications of the power electronic converter. The real practice shows that these failures are connected with the con-centration of the transient power pulse. In allusion to the physical characteristics of power electronic converters,this paper proposed that the power pulse and its se-quence are the basis for power electronics in the perspective of electromagnetic energy. The authors analyzed the transient processes in the power semiconductors,electric conduction loops and controller system and illustrated the power pulse phenomena in high voltage and high power inverters. This investigation on the power pulse sequence is very meaningful for the failure analysis and device pro-tection and has become an important topic in power electronics.

关键词： power electronics power pulse transient process

The Averaged-value Model of a Flexible power electronics Based Substation in Hybrid AC/DC Distribution Systems

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CSEE Journal of power and Energy Systems 2022年第2期8卷 452-464页

作者： Hong Liu Zhanfeng Deng Xialin Li Li Guo Di Huang Shouqiang Fu Xiangyu Chen Chengshan Wang the Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China the State Key Laboratory of Advanced power Transmission Technology Global Energy Interconnection Research InstituteBeijing 100220China the State Grid Jibei Electric power Economic Research Institute Beijing 100038China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjinChina the Guangzhou power Supply Bureau of Guangdong Grid Co. Ltd.Guangzhou 510620China

The concept of a flexible power electronics substation(FPES)was first applied in the Zhangbei DC distribution network demonstration *** a multi-port power electronics transformer(PET)with different AC and DC voltage levels,the FPES has adopted a novel topology integrating modular multilevel converter(MMC)and four-winding medium frequency transformer(FWMFT)based multiport DC-DC converter,which can significantly reduce capacitance in each sub-module(SM)of a MMC and also save space and *** this paper,in order to accelerate speed of electromagnetic transient(EMT)simulations of FPES based hybrid AC/DC distribution systems,an averaged-value model(AVM)is proposed for efficient and accurate representation of *** that all SM capacitor voltages are perfectly balanced in the MMC,then the MMC behavior can be modeled using controlled voltage sources based on modulation voltages from control *** terms of the averaged current transfer characteristics among the windings of the FWMFT,we consider that all multiport DC-DC converters are controlled with the same dynamics,a lumped averaged model using controlled current and voltage sources has been developed for these four-port DC-DC converters connected to the upper or lower arms of the *** presented FPES AVM model has been tested and validated by comparison with a detailed IGBT-based EMT *** show that the AVM is significantly more efficient while maintaining its accuracy in an EMT simulation.

关键词： Averaged-value model(AVM) flexible power electronics substation(FPES) four-winding medium frequency transformer(FWMFT) hybrid AC/DC distribution systems modular multilevel converter(MMC) multiport DC-DC converter

ECPE-The Industrial and Research Network for power electronics in Europe

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ECPE-The Industrial and Research Network for Power Electroni...

Research on the Intelligent Control Strategy of the Fuel Cell Phase-Shifting Full-Bridge power electronics DC-DC Converter

2006中国电工技术学会电力电子学会第十届学术年会

作者： Thomas Harder Leo Lorenz General Manager ECPE European Center for Power Electronics90443 Nuremberg Germany Senior Director Infineon TechnologiesPresident ECPE

＜正＞ECPE European Center for power electronics is an Industrial and Research Network for power electronics in Europe with focus on research, education and advanced training as well as on public relations for power electronics. ECPE is driving precompetitive joint research in power electronics financed from an industrial research fund. Three Demonstrator Programs have been started in 2003/2004 involving leading Competence Centers in Europe. The paper gives an overview and presents first results from the ECPE Demonstrator Programs

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Energy Engineering 2022年第1期119卷 387-405页

作者： Lei Zhang Yinlong Yuan Yihe Sun Yun Cheng Dian Wu Lei Ren School of Electrical Engineering Nantong UniversityNantong226019China School of Electrical and power Engineering China University of Mining and TechnologyXuzhou221116China

focus of all *** an effective new energy,the fuel cell has attracted the attention of ***,due to the particularity of proton exchange membrane fuel cell(PEMFC),the performance of traditional PI controlled phase-shifted full-bridge power electronics DC-DC converter cannot meet the needs of practical *** order to further improve the dynamic performance of the converter,this paper first introduces several main topologies of the current mainstream front-end DC-DC converter,and analyzes their performance in the fuel cell ***,the operation process of the phase-shifted fullbridge power electronics DC-DC converter is introduced,and the shortcomings of the traditional PI control are ***,a double closed-loop adaptive fuzzy PI controller is proposed,which is characterized by dynamically adjusting PI parameters according to different working states to complete the intelligent control of phase-shifted full-bridge DC-DC *** simulation results in MATLAB/Simulink show that the proposed algorithm has good a control *** with the traditional algorithm,the overshoot and stabilization time of the system are *** algorithm can effectively suppress the fluctuation of the output current of the fuel cell converter,and is a very practical control method.

关键词： Phase-shifted full-bridge adaptive fuzzy PI control proton exchange membrane fuel cell MATLAB/Simulink

Recent advances in NiO/Ga_(2)O_(3) heterojunctions for power electronics

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Journal of Semiconductors 2023年第6期44卷 24-38页

作者： Xing Lu Yuxin Deng Yanli Pei Zimin Chen Gang Wang State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275China

Beta gallium oxide(β-Ga_(2)O_(3)) has attracted significant attention for applications in power electronics due to its ultrawide bandgap of ~ 4.8 eV and the large critical electric field of 8 MV/cm. These properties yield a high Baliga's figures of merit(BFOM) of more than 3000. Though β-Ga_(2)O_(3) possesses superior material properties, the lack of p-type doping is the main obstacle that hinders the development of β-Ga_(2)O_(3)-based power devices for commercial use. Constructing heterojunctions by employing other p-type materials has been proven to be a feasible solution to this issue. Nickel oxide(NiO) is the most promising candidate due to its wide band gap of 3.6–4.0 eV. So far, remarkable progress has been made in NiO/β-Ga_(2)O_(3) heterojunction power devices. This review aims to summarize recent advances in the construction, characterization, and device performance of the NiO/β-Ga_(2)O_(3) heterojunction power devices. The crystallinity, band structure, and carrier transport property of the sputtered NiO/β-Ga_(2)O_(3) heterojunctions are discussed. Various device architectures, including the NiO/β-Ga_(2)O_(3) heterojunction pn diodes(HJDs), junction barrier Schottky(JBS) diodes, and junction field effect transistors(JFET), as well as the edge terminations and super-junctions based on the NiO/β-Ga_(2)O_(3) heterojunction, are described.

关键词： gallium oxide(Ga_(2)O_(3)) nickel oxide(NiO) heterojunction power devices

Pressure Tolerant power electronics： IGBT Gate Driver for Operation in High Pressure Hydrostatic Environment

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Journal of Energy and power Engineering 2012年第9期6卷 1500-1508页

作者： Riccardo Pittini Magnar Hernes Kjell Ljokelsoy Electric power Systems SINTEF Energy Research Trondheim 7465 Norway

Abstract： This paper presents results from an on-going research project on pressure tolerant power electronics at SINTEF Energy Research, Norway. The driving force for this research is to enable power electronic components to operate in pressurized dielectric environment. The intended application is the converters for operation down to 3,000 meters ocean depth, primarily for subsea oil and gas processing. The paper focuses on the needed modifications to a general purpose gate driver for IGBT （insulated gate bipolar transistors） that will give pressure tolerance. Adaptations and modifications of the individual driver components are *** results from preliminary testing are promising, which shows that the considered adaptations give feasible solutions.

关键词： Pressure tolerant power electronics IGBT gate driver voltage source converter capacitors power semiconductors.

Fast Square Root Calculation without Division for High Performance Control Systems of power electronics

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CES Transactions on Electrical Machines and Systems 2022年第2期6卷 145-152页

作者： Anton Dianov Alecksey Anuchin Alexey Bodrov Daeyoung R&D center 16954YonginKorea National Research University“Moscow power Engineering Institute” 111250MoscowRussia School of Engineering the University of ManchesterManchesterUK

The calculation of square roots is a frequently used operation in control systems of power electronics for different applications:motor drives,power converters,*** the same time,the execution of this procedure significantly loads microcontrollers and uses its power,which can be utilized for performing other important ***,it restricts the size of code,which can be processed by the microcontroller and compels developers to limit the number of functions,or to decrease execution frequency of a ***,the calculation of square roots is a bottle-neck in implementation of high-performance control systems,thus effective optimization of this task is extremely important in modern and efficient *** respect that many applications do not need precise calculation of square roots,the optimization of execution time can be achieved by decreasing of precision of the *** proposed technique is based on the approximation of parabola with hyperbola,which allows you to rapidly find the approximate value of a square *** into account that many digital signal processors(DSP)are not equipped with an effective divider,the developed algorithm does not use divisions,so it can be executed *** payback for this optimization is approximation error with a maximum of 0.5%,however,it is acceptable for the overwhelming majority of control systems.

关键词： Approximate computing Approximation algorithms Newton method Numerical methods