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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Jianxing Zhang Jiong Chen Shanxu Duan State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei Province China NIO Co. Ltd. Jiading District Shanghai China

ISBN: (纸本)9781538614280

Battery swapping mode is a highly competitive and developing mode for the development of electric vehicle (EV). Constructing compact distributed battery swapping stations for EVs in developed cities is a key task and challenge for the development and application of EVs. In terms of the planning of distributed battery swapping stations, after introducing the online to offline (O2O) service based operation mode of it, this paper proposes an optimal siting method to obtain the optimal locations of distributed battery swapping stations using K-means algorithm. Simulation results demonstrate the effectiveness of the proposed method.

关键词： Batteries Business Industries Optimization Clustering algorithms Urban areas Layout

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Operational Inductance of DFIG-based Wind Turbines for Fault Current Analysis during LVRT

Operational Inductance of DFIG-based Wind Turbines for Fault...

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IEEE Power and Energy Society General Meeting

作者： Yuanzhu Chang Jiabing Hu Wangqianyun Tang Haiyan Tang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing

ISBN: (纸本)9781538622131;9781538622124

As doubly fed induction generator (DFIG) based wind turbines (WTs) have already become a significant power source in modern power systems, characterizing its fault current is one of the basic requirements for system analysis. However, due to various fault ride through strategies and flexible switching schemes, this research is of less progress under severe grid fault conditions. In this paper, the operational inductance of DFIG-based WT is proposed for extracting the influence of various ride through strategies on fault current characteristics. Furthermore, a uniform and simple analytical expression is developed under the switch of three typical ride through strategies. Based on the obtained analytical expression, the allocation of initial value, damping and frequency deviation of stator current are identified and described clearly. Finally, the analytical results are verified with the mathematic solution and the IGBT-detailed simulation of a commercial GE 1.5MW WT.

关键词： Inductance Rotors Stator windings Doubly fed induction generators Damping Phase locked loops

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Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3

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Physical Review X 2023年第1期13卷 011048-011048页

作者： R. Abbott T. D. Abbott F. Acernese K. Ackley C. Adams N. Adhikari R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith T. Akutsu P. F. de Alarcón S. Akcay S. Albanesi A. Allocca P. A. Altin A. Amato C. Anand S. Anand A. Ananyeva S. B. Anderson W. G. Anderson M. Ando T. Andrade N. Andres T. Andrić S. V. Angelova S. Ansoldi J. M. Antelis S. Antier F. Antonini S. Appert Koji Arai Koya Arai Y. Arai S. Araki A. Araya M. C. Araya J. S. Areeda M. Arène N. Aritomi N. Arnaud M. Arogeti S. M. Aronson K. G. Arun H. Asada Y. Asali G. Ashton Y. Aso M. Assiduo S. M. Aston P. Astone F. Aubin C. Austin S. Babak F. Badaracco M. K. M. Bader C. Badger S. Bae Y. Bae A. M. Baer S. Bagnasco Y. Bai L. Baiotti J. Baird R. Bajpai M. Ball G. Ballardin S. W. Ballmer A. Balsamo G. Baltus S. Banagiri D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare U. Bhardwaj D. Bhattacharjee S. Bhaumik I. A. Bilenko G. Billingsley S. Bini R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. Brandt J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic C. Buy R. L. Byer L. Cadonati LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Universitat de les Illes Balears IAC3–IEEC E-07122 Palma de Mallorca Spain University College Dublin Dublin 4 Ireland INFN Sezione di Torino I-10125 Torino Italy Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli

We report on the population properties of compact binary mergers inferred from gravitational-wave observations of these systems during the first three LIGO-Virgo observing runs. The Gravitational-Wave Transient Catalog 3 (GWTC-3) contains signals consistent with three classes of binary mergers: binary black hole, binary neutron star, and neutron star–black hole mergers. We infer the binary neutron star merger rate to be between 10 and 1700 Gpc−3 yr−1 and the neutron star–black hole merger rate to be between 7.8 and 140 Gpc−3 yr−1, assuming a constant rate density in the comoving frame and taking the union of 90% credible intervals for methods used in this work. We infer the binary black hole merger rate, allowing for evolution with redshift, to be between 17.9 and 44 Gpc−3 yr−1 at a fiducial redshift (z=0.2). The rate of binary black hole mergers is observed to increase with redshift at a rate proportional to (1+z)κ with κ=2.9−1.8+1.7 for z≲1. Using both binary neutron star and neutron star–black hole binaries, we obtain a broad, relatively flat neutron star mass distribution extending from 1.2−0.2+0.1 to 2.0−0.3+0.3M⊙. We confidently determine that the merger rate as a function of mass sharply declines after the expected maximum neutron star mass, but cannot yet confirm or rule out the existence of a lower mass gap between neutron stars and black holes. We also find the binary black hole mass distribution has localized over- and underdensities relative to a power-law distribution, with peaks emerging at chirp masses of 8.3−0.5+0.3 and 27.9−1.8+1.9M⊙. While we continue to find that the mass distribution of a binary’s more massive component strongly decreases as a function of primary mass, we observe no evidence of a strongly suppressed merger rate above approximately 60M⊙, which would indicate the presence of a upper mass gap. Observed black hole spins are small, with half of spin magnitudes below χi≈0.25. While the majority of spins are preferentially aligned wi

关键词： Gravitational wave sources Gravitational waves Gravitational wave detection

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electromagnetic and thermal analyses of Faraday shield of various materials and structures for an ICP source

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AIP Conference Proceedings 2018年第1期2052卷

作者： Peng Chen Dong Li Dezhi Chen Fei Song Chen Zuo Peng Zhao Guangjiu Lei 1State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China 2Southwestern Institute of Physics Chengdu 610041 China

Faraday shield (FS), a thin-wall metal structure with slits, is used in inductive coupled plasma (ICP) sources to protect the ceramic tube from plasma erosion and eliminate capacitive coupling. electromagnetic energy is coupled into the driver through the slits, which makes FS an important component of ICP sources. Material and structure, which are critical for FS, should have effects on the distribution of electromagnetic field and temperature. In this contribution, discussions on various materials and structures’ impact on electromagnetic and thermal performance arise. FS made of copper, aluminum, molybdenum and stainless steel, as well as FS of different thickness, slit width, slit numbers and slit shapes, are investigated by numerical simulations referring to the parameters of an actual ICP source. electromagnetic field, RF power loss, temperature and stress of different FS are compared. The results show that Mo has similar electromagnetic performance with Cu but better thermal performance than Cu for FS. As for structure, RF power transfer efficiency decreases slightly as FS thickens. Appropriate slit width and number are required to allow a sufficient RF coupling and acceptable plasma heat flux to ceramic tube. RF efficiency of z-shaped slotted FS and normally slotted FS is almost the same.

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Using STATCOM with energy storage to enhance ACDC system stability

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Telkomnika (Telecommunication Computing Electronics and Control) 2016年第2期14卷 423-430页

作者： Xu, Zheng Jianyong, Ding Mei, Li Shuang, Zhao Ni, Zeng Ruoxi, Zhu Chengxiong, Mao Buhan, Zhang School of Electrical Engineering Wuhan University Wuhan China State Grid Hubei Economic Research Institute Wuhan China State Key Laboratory of Advanced Electromagnetic Engineering Technology Huazhong University of Science and Technology Wuhan China

UHVDC has been rapidly developed for its large conveying capacity, small net loss and easy power control, which can solve the problem of the uneven distribution of load and energy with great economy. However, with DC transmission access, the power system must have a strong ability of reactive power support to cope with the possibility of transient voltage problem. At the same time, regional power oscillation issue also can't be ignored. Considering that the STATCOM device, as a type of parallel FACTS, can only provide dynamic reactive power to support the system voltage and cannot undertake active regulation and control to damp system power oscillation problem, STATCOM with energy storage is presented in this paper to solve both problem of transient voltage and power oscillation in AC-DC hybrid system. In view of the central China province power grid planning, possible serious faults of the system were analyzed. The simulation results show that STATCOM with energy storage cannot only effectively support the system transient voltage and promote voltage of dc inverter station to avoid DC block caused by commutation failure, but also can significantly enhance the system damping and restrain regional power oscillation in case of system failure. © 2016 Universitas Ahmad Dahlan.

关键词： Static synchronous compensators

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Neural stem cells differentiation based on nanosecond-microplasma

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Nanomedicine: Nanotechnology, Biology and Medicine 2018年第5期14卷 1827-1827页

作者： Shasha Zhao Yang Zhang Juan Wang Xinpei Lu Institute of Biology and Medicine Wuhan University of Science and Technology Wuhan Hubei 430065 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei 430030 China

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Mixed-integer second-order cone programming taking appropriate approximation for the unit commitment in hybrid AC–DC grid

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The Journal of engineering 2017年第13期2017卷 1462-1467页

作者： Bo Zhou Xiaomeng Ai Jiakun Fang Jingyu Wen Jianhua Yang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan People's Republic of China Department of Energy Technology Aalborg University Aalborg Denmark Central China Branch of State Grid Corporation of China Wuhan People's Republic of China

With the rapid development and deployment of voltage source converter based high-voltage direct current, the traditional power system is evolving to the hybrid AC–DC grid. New optimisation methods are urgently needed for these hybrid AC–DC power systems. In this study, mixed-integer second-order cone programming (MISOCP) for the hybrid AC–DC power systems is proposed. The second-order cone relaxation is adopted to transform the AC and DC power flow constraints to MISOCP. Several IEEE test systems are used to validate the proposed MISCOP formulation of the optimal power flow and unit commitment in the hybrid AC–DC power systems.

关键词： integer programming hybrid power systems power generation dispatch power generation scheduling voltage-source convertors HVDC power convertors load flow optimal power flow IEEE test systems AC power flow constraints DC power flow constraints second-order cone relaxation MISOCP hybrid AC–DC power systems optimisation methods high-voltage direct current converter voltage source converter hybrid AC-DC grid unit commitment mixed-integer second-order cone programming

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Supplementary damping control of VSC-HVDC for interarea oscillation using goal representation heuristic dynamic programming 12

Supplementary damping control of VSC-HVDC for interarea osci...

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12th IET International Conference on AC and DC Power Transmission, ACDC 2016

作者： Shen, Yu Chen, Weibiao Yao, Wei Liao, Shiwu Wen, Jinyu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei Province430074 China

ISBN: (纸本)9781785612268

The interarea oscillation is one of the main challenges for the secure and stable operation of a large-scale interconnected AC/DC power system. As the voltage source converter high voltage direct current (VSC-HVDC) transmission system features the fast and flexible power regulation capability, supplementary damping controller (SDC) can be designed for VSC-HVDC to suppress interarea oscillation in a large-scale AC/DC power system. In this paper, an innovative adaptive dynamic programming approach, namely the goal representation heuristic dynamic programming (GrHDP), is proposed to design SDC for VSC-HVDC. The GrHDP based SDC consists of three neural networks, which can automatically form an internal adaptive reward signal to facilitate better mapping between the system state and the control action. Therefore, the GrHDP based SDC can significantly improve the dynamic performance of the power system. Without knowing the exact mathematic model of the power system, the GrHDP based SDC still conducts the quick learning and universal control characteristics and has strong adaptability, which is superior to the conventional lead-lag SDC. Case study is undertaken based on a two-area four machine power system with one VSC-HVDC transmission line. The conventional lead-lag SDC has also been studied for comparison. Simulation results show that the proposed GrHDP based SDC has better performance in damping interarea oscillation than that of the conventional lead-lag SDC in a wide range of system operating conditions.

关键词： Adaptive control systems

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A design of single phase inverter with three-channel interleaved PFC module 19

A design of single phase inverter with three-channel interle...

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19th International Conference on Electrical Machines and Systems, ICEMS 2016

作者： Cheng, Luo Kai, Yang Xiaoguang, Wang Dezhang, Lou State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China School of Electrical and Electronics Engineering Huazhong University of Science and Technology China

ISBN: (纸本)9784886860989

According to the requirements of the power factor and the dynamic performance of the asynchronous machine tools, an asynchronous motor inverter with three-channel interleaved PFC module is proposed. The proposed inverter is a 5kW asynchronous motor drive control system. The firstly discussed was hardware design of the drive system, especially PFC module. In the end, experimental results in different load conditions about the power factor and the dynamic performance highlight the effectiveness of three-channel interleaved PFC module. © 2016 The Institute of Electrical Engineers of Japan.

关键词： Induction motors

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The optimal state number selection of wind power series generated through MCMC method 12

The optimal state number selection of wind power series gene...

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12th IET International Conference on AC and DC Power Transmission, ACDC 2016

作者： Xu, S.Z. Ai, X.M. Li, J.M. Fang, J.K. Xia, L.F. Wen, J.Y. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei Province430074 China

ISBN: (纸本)9781785612268

Wind power series generation is an effective method to solve the problem of finite time length of wind power output data in simulation. It can provide the necessary data support for the plan and operation of the power system with wind power. Hence, it is of great significance. Markov Chain Monte Carlo (MCMC) method as its specific technology is widely used. But how to select reasonable number of state division is always a main problem existing in the application process of MCMC method. Related research mainly relies on experience to select state number, which is lack of corresponding basis. In order to solve the problem, this paper put forward using the cumulative distribution function (CDF) within the power scope of each state to sample and generate specific wind power randomly combined with MCMC method, which will ensure the overall distribution characteristics of the wind power generated are not changed with the selection of state number. Then this paper proposed a method to select the optimal state number. This method takes the minimum residual sum of square (RSS) of the autocorrelation function (ACF) of the generated series and the original series as the principle to select the state number. Respectively using the method proposed in this paper and the traditional method to generate wind power series for actual wind farms, the results show that the wind power series generated by the improved MCMC method is much better than that generated by the traditional MCMC method in terms of fitting both the distribution and autocorrelation characteristics of original wind power series.

关键词： Monte Carlo methods

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