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Multi-time scale dynamics in power electronics-dominated power systems

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Frontiers of Mechanical Engineering 2017年第3期12卷 303-311页

作者： Xiaoming YUAN Jiabing HU Shijie CHENG State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

Electric power infrastructure has recently undergone a comprehensive transformation from electromagnetics to semiconductors. Such a development is attributed to the rapid growth of power electronic converter applications in the load side to realize energy conservation and on the supply side for renewable generations and power transmissions using high voltage direct current transmission. This transformation has altered the fundamental mechanism of power system dynamics, which demands the establishment of a new theory for power system control and protection. This paper presents thoughts on a theoretical framework for the coming semiconducting power systems.

关键词： power electronics power systems multi-time scale dynamics mass-spring-damping model self-stabilizing and en-stabilizing property multi-time scale power system stabilizer

power electronics and Motor Drives : Advances and Trends 1St Edition

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Contemporary Trends in power electronics Converters for Charging Solutions of Electric Vehicles

2006年

作者： Bimal K. Bose

ISBN: (纸本)9780120884056;9780080457383

power electronics is an area of extremely important and rapidly changing technology. Technological advancements in the area contribute to performance improvement and cost reduction, with applications proliferating in industrial, commercial, residential, military and aerospace environments. This book is meant to help engineers operating in all these areas to stay up-to-date on the most recent advances in the field, as well as to be a vehicle for clarifying increasingly complex theories and mathematics. This book will be a cost-effective and convenient way for engineers to get up-to-speed on the latest trends in power electronics. The reader will obtain the same level of informative instruction as they would if attending an IEEE course or a training session, but without ever leaving the office or living room! The author is in an excellent position to offer this instruction as he teaches many such courses.Self-learning advanced tutorial, falling between a traditional textbook and a professional reference.Almost every page features either a detailed figure or a bulleted chart, accompanied by clear descriptive explanatory text.

关键词： power electronics Electric motors

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CSEE Journal of power and Energy Systems 2020年第4期6卷 911-929页

作者： Salman Habib Muhammad Mansoor Khan Farukh Abbas Abdar Ali Muhammad Talib Faiz Farheen Ehsan Houjun Tang School of Electronic Information and Electrical Engineeringand Key Laboratory of Control of Power Transmission and ConversionShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical Engineering University of Engineering and TechnologyLahore 54890Pakistan School of International and Public Affairs Shanghai Jiao Tong UniversityShanghai 200240China

Electrifying the transport sector requires new possibilities for power electronics converters to attain reliable and efficient charging solutions for electric vehicles(EVs).With the continuous development in power electronics converters,the desire to reduce gasoline consumption and to increase the battery capacity for more electric range is achievable for EVs in the near future.The main interface between the power network and EV battery system is a power electronics converter,therefore,there is a considerable need of new power converters with low cost and high reliability for the advance charging mechanism of EVs.The rapid growth in power converter topologies brings substantial opportunities in EV charging process.In view of this fact,this paper investigates the significant aspects,current progress,and challenges associated with several power converters to suggest further improvements in charging systems of EVs.In particular,an extensive analysis of front-end as well as back-end converter configurations is presented.Moreover,the comparative properties of resonant converter topologies along with other DCDC converters are discussed in detail.Additionally,isolated,and non-isolated topologies with soft switching techniques are classified and rigorously analyzed with a view to their respective issues and benefits.It is foreseen that this paper would be a valuable addition and a worthy source of information for researchers exploring the area of power converter topologies for charging solutions of EVs.

关键词： Batteries chargers converter topologies electric vehicles(EVs) power electronics plug-in hybrid electric vehicles(PHEVs)

Thermal Analyses of power electronics Integrated with Vapour Chamber Cooling

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Automotive Innovation 2020年第4期3卷 328-335页

作者： Yiyi Chen Yuying Yan Bo Li Faculty of Engineering University of NottinghamNottingham NG72RDUK Dynex Semiconductor Limited Doddington RoadLincoln LN63LFUK Research Centre for Fluids and Thermal Engineering University of NottinghamNingbo 315100China

Insulated gate bipolar transistor(IGBT)power module is used for power switching transistor devices in the power supply and motor control circuits in both hybrid electric vehicles and electric vehicles.The target of heat flux of IGBT is continuously increasing due to the demand for power rating improvements and miniaturisation.Without suitable efficient cooling technolo-gies,excessively high temperature and uneven temperature distribution can cause high thermal stress,eventually leading to severe module failures.Therefore,highly efficient cooling solutions are highly required.Vapour chamber with phase change can provide quick heat transfer and low temperature gradient.This study proposes a new IGBT structure integrated with vapour chamber.The tests and simulation results indicate that the thermal and thermo-mechanical performances of IGBT integrated with vapour chamber are better than those of the IGBT with copper baseplate module.The thermal resistance between the junction and heat sink is reduced from 0.25 to 0.14°C/W,and the temperature uniformity is greatly improved due to the phase change in the vapour chamber.The simulation also investigates the thermal stress distribution,deformation and thermal fatigue lifespan of IGBT power electronics module.A reduction of 21.8%in thermal stress and an increase of 9%in lifespan of Sn-3.5Ag solder are achieved.

关键词： power electronics IGBT Phase change cooling Thermal performances Thermal fatigue lifespan

Research on Online Teaching and Offline Course Construction for power electronics

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Journal of Contemporary Educational Research 2023年第3期7卷 55-63页

作者： Wei Liang School of Information and Automation Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Due to the impact of the novel coronavirus outbreak,universities have adopted online teaching and carried out remote teaching.With the improvement of the epidemic and the approaching of the new school year,the organic connection between online teaching during the epidemic and offline course construction after the epidemic is not only a challenge for tertiary education teachers,but also an urgent issue to be addressed.Therefore,the power electronics course is taken as an example to explore this connection.

关键词： power electronics Online teaching Course construction

Active Thermal Control for Delaying Maintenance of power electronics Converters

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Chinese Journal of Electrical Engineering 2018年第3期4卷 13-20页

作者： Markus Andresen Johannes Kuprat Vivek Raveendran Johannes Falck Marco Liserre Christian-Albrechts-Universität zu Kiel KielGermany

Several studies have reported about power semiconductors and capacitors being the most sensitive components in power converters.The lifetime of these devices is associated with the mission profile and the resulting temperature profile.For preventing failures,it is of interest to estimate the Remaining Useful Lifetime(RUL)and several condition monitoring methods have been proposed for this purpose.Moreover,modular power converters consist of a high number of components and methods have been proposed to reduce the thermal stress and therefore extend the lifetime of a system with software,referred to as active thermal control.For power converters with limited accessibility,the RUL detected by the condition monitoring system may not fit to the scheduled maintenance of the system and devices may still have a significant RUL when their replacement is scheduled.Therefore,this work proposes to control the stress of the most deteriorated components in the system such that the failure probability of multiple building blocks is equalized when the next maintenance is scheduled.Moreover,this concept is proposed to extend the time to the next maintenance and reduce the number of maintenance instances without affecting the mean lifetime of the system.

关键词： power electronics reliability condition monitoring active thermal control prognostic maintenance

power electronics for PV-Based Communal Grids

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Smart Grid and Renewable Energy 2016年第2期7卷 67-82页

作者： Nicholas Opiyo Energy Research Institute SCAPE University of Leeds Leeds UK

In this paper power electronics used in PV power generation systems have been reviewed and modelled. PV systems need converters for maximum power point tracking, power conditioning, voltage step-up/down as necessary, and for storage charge-controlling. Inverters are needed for AC loads and for utility grid interfacing. The four basic DC-DC converters commonly used with PV systems have been reviewed and modelled. Different DC-AC inverter types and operational architectures have also been reviewed with the two-stage DC-AC inverter, with the point of common coupling (PCC) at the inverter input, suggested as the most cost-effective and efficient architecture for PV-based communal grids. This is because only one inverter is used for the entire system as opposed to an inverter for every module string, resulting in higher efficiencies, low cost, and low harmonic distortions when compared to systems with PCC at AC terminal. The aim of power conversion/inversion is to extract maximum power possible from the PV system and where necessary, to invert it at close to 100% as possible. Highlight: 1) DC-DC converters are necessary for power conditioning in PV systems;2) DC-AC inverters are necessary for AC loads and for utility grid interfacing;3) DC-AC inverters are also used to control the PV systems when grid connected;4) Best inverter configuration cost-effectively and efficiently allows easy system modifications.

关键词： power electronics PV Communal Grids Modelling Control Architecture

power electronics and Its Application to Solar Photovoltaic Systems in India

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Energy and power Engineering 2016年第2期8卷 76-91页

作者： Nishij Ganpatrao Kulkarni Vasudeo Bapuji Virulkar Electrical Engineering Department M.B.E. Society’s College of Engineering Ambajogai India Electrical Engineering Department Government College of Engineering Amravati India

Out of many renewable energy resources, solar energy is one of the conspicuous sources of energy which can supply the increasing demand of energy. As of May 2014, India has an installed PV capacity of 2.5 GW. The solar photovoltaic project includes power electronics with high quality performance devices, incorporated with smart energy management principles. power electronics is used to improve the energy efficiency of apparatus, and help the generation of environmentally clean energy. In this article the explanation of role of power electronics and the discussion about similar and future concepts in solar photovoltaic systems related to reliability and advancement of each technology in India has been presented.

关键词： Indian Scenerio power electronics Solar PV Systems

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

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Journal of power and Energy Engineering 2024年第5期12卷 60-75页

作者： Sinqobile Wiseman Nene Bolanle Tolulope Abe Agha Francis Nnachi Department of Electrical Engineering Tshwane University of Technology eMalahleni South Africa

This article presents an extensive examination and modeling of Capacitor Coupled Substations (CCS), noting some of their inherent constraints. The underlying implementation of a CCS is to supply electricity directly from high-voltage (HV) transmission lines to low-voltage (LV) consumers through coupling capacitors and is said to be cost-effective as compared to conventional distribution networks. However, the functionality of such substations is susceptible to various transient phenomena, including ferroresonance and overvoltage occurrences. To address these challenges, the study uses simulations to evaluate the effectiveness of conventional resistor-inductor-capacitor (RLC) filter in mitigating hazardous overvoltage resulting from transients. The proposed methodology entails using standard RLC filter to suppress transients and its associated overvoltage risks. Through a series of MATLAB/Simulink simulations, the research emphasizes the practical effectiveness of this technique. The study examines the impact of transients under varied operational scenarios, including no-load switching conditions, temporary short-circuits, and load on/off events. The primary aim of the article is to assess the viability of using an established technology to manage system instabilities upon the energization of a CCS under no-load circumstances or in case of a short-circuit fault occurring on the primary side of the CCS distribution transformer. The findings underscore the effectiveness of conventional RLC filters in suppressing transients induced by the CCS no-load switching.

关键词： Capacitor Coupled Substation System Modeling Ferroresonance RLC filters power electronics Transients Capacitor Voltage Transformers Transmission Lines