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Stability of interacting grid-connected power converters

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Journal of Modern power Systems and Clean Energy 2013年第3期1卷 249-257页

作者： Cheng WAN Meng HUANG Chi K.TSE Xinbo RUAN State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhanChina Department of Electronic and Information Engineering Hong Kong Polytechnic UniversityHong KongChina School of Electronic Engineering Wuhan UniversityWuhanChina College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjingChina

The power grid in a typical micro distribution system is non-ideal,presenting itself as a voltage source with significant ***,grid-connected converters interact with each other via the non-ideal *** this study,we consider the practical scenario of voltage-source converters connected to a three-phase voltage source with significant *** show that stability can be compromised in the interacting ***,the stable operating regions in selected parameter space may be reduced when grid-connected converters interact under certain *** this paper,we develop bifurcation boundaries in the parameter space with respect to Hopftype instability.A small-signal model in the dq-frame is adopted to analyze the system using an impedance-based ***,results are presented in design-oriented forms so as to facilitate the identification of variation trends of the parameter ranges that guarantee stable operation.

关键词： power converters Stability analysis Interacting systems Grid-connected converters

Analysis and control of wind-driven self-excited induction generators connected to the grid through power converters

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Frontiers in Energy 2012年第4期6卷 403-412页

作者： S. Senthil KUMAt N. KUMARESAN N. Ammasai GOUNDEN Namani RAKESH Department of Electrical and Electronics Engineering National Instituteof Technology Tiruchirappalli Tamil Nadu 620015 India

The analysis of the wind-driven self-excited induction generators （SEIGs） connected to the grid through power converters has been developed in this paper. For this analysis, a method of representing the grid power as equivalent load resistance in the steady-state equivalent circuit of SEIG has been formulated. The technique of genetic algorithm （GA） has been adopted for making the analysis of the proposed system simple and straightfor- ward. The control of SEIG is attempted by connecting an uncontrolled diode bridge rectifier （DBR） and a line commutated inverter （LCI） between the generator term- inals and three-phase utility grid. A simple control technique for maximum power point tracking （MPPT） in wind energy conversion systems （WECS）, in which the firing angle of the LCI alone needs to be controlled by sensing the rotor speed of the generator has been proposed. The effectiveness of the proposed method of MPPT and method of analysis of this wind-driven SEIG-converter system connected to the grid through power converters has been demonstrated by experiments and simulation. These experimental and simulated results confirm the usefulness and successful working of the proposed system and its analysis.

关键词： self-excited induction generator (SEIG),renewable power generation power converters maximumpower point tracking (MPPT) steady state analysis powergeneration systems

Comprehensive Review and Analysis of Two-element Resonant Compensation Topologies for Wireless Inductive power Transfer Systems

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Chinese Journal of Electrical Engineering 2019年第2期5卷 14-31页

作者： K.N.Mude K.Aditya Systec R&D PortoPortugal University Ontario Institute of Technology OShawaCanada

Wireless power transfer(WPT)is gaining much attention for battery charging of electric vehicles(EVs).Resonant WPT systems play a crucial role in achieving efficient power transfer from source to *** overview of two-element resonant compensation techniques and their characteristics under various operating conditions are *** the converter and control strategies used for different topologies are *** behavior of the performance factors are evaluated against the operating conditions and compared for the different topologies.

关键词： Resonant wireless power transfer compensation topologies power converters battery charging

Toward More Electric powertrains in Aircraft:Technical Challenges and Advancements

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CES Transactions on Electrical Machines and Systems 2021年第3期5卷 177-193页

作者： Joseph Benzaquen JiangBiao He Behrooz Mirafzal the School of Electrical and Computer Engineering Georgia Institute of TechnologyAtlantaGA 30332 University of Kentucky LexingtonKY 40506 Electrical and Computer Engineering Department Kansas State UniversityManhattanKS 66506 USA

The main purpose of this article is to provide an instructive review of the technological challenges hindering the road toward more electric powertrains in ***,all-electric,and turboelectric powertrain architectures are discussed as possible fuel consumption and weight reduction *** these architectures,the short-term implementation of hybrid and all-electric architectures is limited,particularly for large-capacity aircraft due to the low energy/power density levels achievable by state-of-the-art electrical energy storage ***,turboelectric architectures with advanced distributed propulsion and boundary layer ingestion are set to lead the efforts toward more electric *** the center of this transition,power converters and high-power density electric machines,i.e.,electric motors and generators,and their corresponding thermal management systems are analyzed as the key devices enabling the more electric ***,to further increase the fuel efficiency and power density of the aircraft,the benefits and challenges of implementing higher voltage powertrains are ***,based on the findings collected in this article,the projected roadmap toward more electric aircraft powertrains is ***,the individual targets for each technology,i.e.,batteries,electric machines,and power converters,and how they translate to future aircraft prototypes are illustrated.

关键词： All-electric aircraft hybrid aircraft powertrain power converters electric machines efficiency power density

Analysis of Modeling the Influence of Electromagnetic Fields Radiated by Industrial Static converters and Impacts on Operators Using Maxwell’s Equations

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Open Journal of Applied Sciences 2024年第8期14卷 2320-2350页

作者： Anthony Bassesuka Sandoka Nzao Tuka Biaba Samuel Garcia Obed Bitala Arsène Kasereka Kibwana Emmanuel Ndaye Kibuayi ISTA Kinshasa Electrical Engineering Kinshasa Democratic Republic of Congo Doctoral School of ISTA Kinshasa Complementary Master in Science and Technology/Electrical Engineering Electrotechnical Option Kinshasa Democratic Republic of Congo ISTA Kinshasa Doctoral School in Science and Technology Electronics Option Kinshasa Democratic Republic of Congo

The study of Electromagnetic Compatibility is essential to ensure the harmonious operation of electronic equipment in a shared environment. The basic principles of Electromagnetic Compatibility focus on the ability of devices to withstand electromagnetic disturbances and not produce disturbances that could affect other systems. Imperceptible in most work situations, electromagnetic fields can, beyond certain thresholds, have effects on human health. The objective of the present article is focused on the modeling analysis of the influence of geometric parameters of industrial static converters radiated electromagnetic fields using Maxwell’s equations. To do this we used the analytical formalism for calculating the electromagnetic field emitted by a filiform conductor, to model the electromagnetic radiation of this device in the spatio-temporal domain. The interactions of electromagnetic waves with human bodies are complex and depend on several factors linked to the characteristics of the incident wave. To model these interactions, we implemented the physical laws of electromagnetic wave propagation based on Maxwell’s and bio-heat equations to obtain consistent results. These obtained models allowed us to evaluate the spatial profile of induced current and temperature of biological tissue during exposure to electromagnetic waves generated by this system. The simulation 2D results obtained from computer tools show that the temperature variation and current induced by the electromagnetic field can have a very significant influence on the life of biological tissue. The paper provides a comprehensive analysis using advanced mathematical models to evaluate the influence of electromagnetic fields. The findings have direct implications for workplace safety, potentially influencing standards and regulations concerning electromagnetic exposure in industrial settings.

关键词： Modeling Electromagnetic Field power converters Geometric Parameters Biological Tissue Maxwell Equation Bio-Heat Equation Thermal Model

Parallel Tolerance Analysis of a power Electronic Converter by the Genetic Algorithm with the Island Model

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Parallel Tolerance Analysis of a Power Electronic Converter ...

Modeling for a Resonant DC Link Inverter

第4届国际电力电子及运动控制国际会议

作者： Toshiji Kato Kaoru Inoue Yuichi Yano Shintaro Oshio Department of Electrical Engineering Doshisha University KyotanabeKyoto610-0321JAPAN Department of Electrical Engineering Doshisha University KyotanabeKyoto610-0321JAPAN Department of Electrical Engineering Doshisha University KyotanabeKyoto610-0321JAPAN Department of Electrical Engineering Doshisha University KyotanabeKyoto610-0321JAPAN

＜正＞ It is necessary to consider variations of circuit element values for a power electronic converter design to satisfy a given specification. This analysis is so-called tolerance or worst-case analysis. The analysis is a sort of nonlinear minimum and maximum （min/max） problem with respect to circuit parameters. However its computation cost is large and practically the problem is converted to a simpler and easier one with various techniques. This paper proposes an approximate method which finds a quasi-min/max solution by applying the Genetic Algorithm （GA）. The GA models an evolution process of life forms for an engineering use and it is mainly applied to an optimization problem to utilize its selection process. This paper proposes the GA method which is based on the island model and suitable for the parallel tolerance analysis to find quasi-optimal solutions. Output voltage variations, for example, of a Cuk converter for element parameter variations are analyzed.

关键词： tolerance analysis power converters genetic algorithm parallel processing DGA

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Modeling for a Resonant DC Link Inverter

SIMULATION MODELING FOR SOFT SWITCHING COMBINATION DC DC CONVERTER 

第4届国际电力电子及运动控制国际会议

作者： YuFANG and Yan XING Aero-power Sic-tech Center Nanjing University of Aeronautics and astronautics Nanjing 210016 P.R.China

＜正＞ Inner current loop modeling of a resonant DC Link Inverter, soft switching combination inverter, which works in current controlled three state discrete pulse modulation mode, is proposed. The modeling method is valid for double loop feedback controlled inverters which works in other modulation mode. Equivalent analytic model is established and used for voltage regulator design. Example are given in the end of the paper.

关键词： power converters control inverters

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Transactions of Nanjing University of Aeronautics and Astronautics 1999年第2期16卷 125-128页

作者：邢岩严仰光南京航空航天大学自动控制系南京210016

A frequency domain modeling method is given for a soft switching combination DC DC converter worked in current controlled discrete pulse modulation mode. A equivalent model for the current loop as one forward component in the converter system is built up directly at the first time. Using time domain simulation and Fourier transform, the method is helpful for system performance analysis and converter voltage regulator design, and can be applied to soft switching combination inverter.

关键词： power converters control simulation mo deling