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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Lin, Qunli Shen, Xinwei Sun, Yong Li, Zhenyuan Guo, Qinglai Sun, Hongbin Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Insitute Tsinghua University Shenzhen China State Grid Corp. of China Jilin Power Grid Company Jilin China State Key Lab. of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing China

ISBN: (纸本)9781728135205

The integrated Energy system (IES) becomes very important nowadays, however, the coupling between multiple energy systems will bring new challenges to the security control of the IES, such as combined heat and power (CHP) system. The corrective control means that the operations can be adjusted after contingency happens to eliminate the constraints violation in the contingency state such as the transmission outage or generator outage. This paper proposes a corrective control approach for CHP system integrated with the energy storage system based on security constrained economic dispatch (SCED) model. Case studies based on the IEEE 9-bus CHP system are presented to verify the method. The case result shows that the energy storage device can solve the ramping of the unit's output adjustment well. The corrective control method is more scientific and economical. © 2019 IEEE.

关键词： Outages

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Research on the dispatch proportion of battery capacity in photovoltaic primary frequency control 3

Research on the dispatch proportion of battery capacity in p...

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3rd IEEE Conference on Energy Internet and Energy system Integration, EI2 2019

作者： Han, Zhijun Luo, Gang Song, Xinrui Yang, Caiming Zhang, Lizong Jia, Yanbing Zhao, Zhou Jin, Yuanwen State Grid Zhejiang Power Co. Ltd. Hangzhou China State Grid Shaoxing Power Supply Company Shaoxing China Taiyuan University of Technology Shanxi Key Lab. of Power System Operation and Control Taiyuan China Shaoxing Jianyuan Power Group Co. Ltd. Shaoxing China

ISBN: (纸本)9781728131375

It is an inevitable problem of frequency control with the increasing capacity of PV connected into large-scale grid. In order to resolve the problem of the contradiction between the increasing demand and dressing supply capacity of frequency control, the requirement of relevant technical for PV to take part in primary frequency control is put forward. The battery-assisted frequency control system is introduced, and the primary frequency control effect can be improved by using its fast response characteristic. In this paper, the ratio of battery output to all power output is used to analyze the primary frequency control gain of the battery participating in the frequency control of the PV plant. The simulation results show that the larger proportion of energy storage system output can bring better frequency control capacity, reduce frequency fluctuations and improve system stability. © 2019 IEEE.

关键词： system stability

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technology Roadmap for Flexible Sensors

引用

ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying Rogers, John A. Rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collab.rative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

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Study on Chaff Diffusion and Polarization Stratification

Study on Chaff Diffusion and Polarization Stratification

引用

2018 IEEE International Conference on Computational Electromagnetics, ICCEM 2018

作者： Cui, Gang Shi, Longfei Ma, Jiazhi Wang, Xuesong National University of Defense Technology State Key Lab. of Complex Electromagnetic Environ. Effects on Electronics and Information System Changsha China

ISBN: (纸本)9781538612415

A new polarization property of chaff cloud is found, differential reflectivity varying with height during diffusion. The differential reflectivity (ZDR) of chaff fiber can be predicted as a function of time and initial orientation. The description of the chaff properties statistical changes from integrated to sectional, which Using this property, distribution curve of differential reflectivity will be plotted after the release of chaff fiber. The results of differential reflectivity stratification can be used as an explanation of the chaff event at the key West, FL KBYX WSR-88D site on 17 June 2016. © 2018 IEEE.

关键词： Polarization

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Multiple residual dense networks for reconfigurable intelligent surfaces cascaded channel estimation

arXiv

引用

arXiv 2021年

作者： Jin, Yu Zhang, Jiayi Huang, Chongwen Yang, Liang Xiao, Huahua Ai, Bo Wang, Zhiqin The School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China The Frontiers Science Center for Smart High-speed Railway System Beijing Jiaotong University Beijing100044 China Zhejiang Provincial Key Lab of Information Processing Communication and Networking Zhejiang University Hangzhou310007 China College of Computer Science and Electronic Engineering Hunan University Changsha410082 China ZTE Corporation State Key Laboratory of Mobile Network Mobile Multimedia Technology Shenzhen518057 China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China Henan Joint International Research Laboratory of Intelligent Networking and Data Analysis Zhengzhou University Zhengzhou450001 China Research Center of Networks and Communications Peng Cheng Laboratory Shenzhen518055 China China Academy of Information and Communications Technology Beijing100191 China

Reconfigurable intelligent surface (RIS) constitutes an essential and promising paradigm that relies programmable wireless environment and provides capability for space-intensive communications, due to the use of low-cost massive reflecting elements over the entire surfaces of man-made structures. However, accurate channel estimation is a fundamental technical prerequisite to achieve the huge performance gains from RIS. By leveraging the low rank structure of RIS channels, three practical residual neural networks, named convolutional blind denoising network, convolutional denoising generative adversarial networks and multiple residual dense network, are proposed to obtain accurate channel state information, which can reflect the impact of different methods on the estimation performance. Simulation results reveal the evolution direction of these three methods and reveal their superior performance compared with existing benchmark schemes. Copyright © 2021, The Authors. All rights reserved.

关键词： Channel estimation

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Supplementary Damping Control of STATCOM to Mitigate SSCI

Supplementary Damping Control of STATCOM to Mitigate SSCI

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Zhang, Xu Xie, Xiaorong Li, Xuan Shair, Jan Liu, Chun Department of Mechanical Electronic and Information Engineering China University of Mining Technology Beijing100083 China Department of Electrical Engineering Tsinghua University Beijing100084 China State Grid Economic Technology Research Institute Co. Ltd. Beijing102209 China State Key Lab. of Power System Tsinghua University Beijing100084 China China Electric Power Research Institute Co. Ltd. Beijing100192 China

ISBN: (纸本)9781728135205

In this paper, a supplementary damping control scheme for static synchronous compensator (STATCOM) is proposed to stabilize the oscillation caused by subsynchronous control interactions (SSCI) phenomenon in a series-compensated doubly fed induction generator (DFIG) based wind farm. Various system conditions determine the oscillation frequency, which is usually different for different SSCI events. Therefore, it is a great challenge to design an efficient and reliable damping controller to stabilize the SSCI. A damping controller based on combination of filters, gain, and phase-shifts is designed for STATCOM controller. With the proposed scheme, the STATCOM is able to provide positive damping for a wide range of system conditions, and thus covering a wide band of oscillation frequencies. The performance of the proposed scheme is validated on an aggregated model of an actual wind power system using Simulink environment. The time-domain simulations have demonstrated the effectiveness of the proposed scheme for mitigating the SSCI at various oscillation frequencies. © 2019 IEEE.

关键词： Static synchronous compensators

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Breakup and Recovery of Topological Zero Modes in Finite Non-Hermitian Optical Lattices

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Physical Review Letters 2019年第16期123卷 165701-165701页

作者： Wange Song Wenzhao Sun Chen Chen Qinghai Song Shumin Xiao Shining Zhu Tao Li National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Integration Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology Shenzhen 518055 China

The topological edge state (TES) in a one-dimensional optical lattice has exhibited robust field localization or waveguiding against the structural perturbations that would give rise to fault-tolerant photonic integrations. However, the zero mode as a kind of TES usually deviates from the exact zero-energy state in a finite Hermitian lattice due to the coupling between these edge states, which inevitably weaken the topological protection. Here, we first show such a breakup of zero modes in finite Su-Schriffer-Heeger optical lattices and then reveal their recovery by introducing non-Hermitian degeneracies with parity-time (PT) symmetry. We carry out experiments in a finite silicon waveguide lattice, where a passive-PT symmetry was implemented with carefully controlled lossy silicon waveguides. The experimental results are fully compatible with the theoretical prediction. Our results show that the topological property of an open system can be tuned by non-Hermitian lattice engineering, which offers a route to enhance the topological protection in a finite system.

关键词： Edge states Phase transitions by order Topological effects in photonic systems Waveguide arrays

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Interpretable disentanglement of neural networks by extracting class-specific subnetwork

arXiv

引用

arXiv 2019年

作者： Wang, Yulong Hu, Xiaolin Su, Hang Institute for Artificial Intelligence State Key Lab. of Intelligent Technol. and Syst. Beijing Natl. Res. Ctr. for Info. Sci. and Technol. BNRist Lab Department of Computer Science and Technology Tsinghua University

We propose a novel perspective to understand deep neural networks in an interpretable disentanglement form. For each semantic class, we extract a class-specific functional subnetwork from the original full model, with compressed structure while maintaining comparable prediction performance. The structure representations of extracted subnetworks display a resemblance to their corresponding class semantic similarities. We also apply extracted subnetworks in visual explanation and adversarial example detection tasks by merely replacing the original full model with class-specific subnetworks. Experiments demonstrate that this intuitive operation can effectively improve explanation saliency accuracy for gradient-based explanation methods, and increase the detection rate for confidence score-based adversarial example detection methods. Copyright © 2019, The Authors. All rights reserved.

关键词： Deep neural networks

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ISAR false target array generated by sub-nyquist sampling jamming in fast and slow time 4

ISAR false target array generated by sub-nyquist sampling ja...

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4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Chen, Jiyuan Pan, Xiaoyi Gu, Zhaoyu Xiao, Shunping Liu, Guangjun National University of Defense Technology State Key Lab. of Complex Electromagnetic Environment Effects on Electronics and Information System Changsha China Equipment Information Management Center of Equipment Development Department Beijing China

ISBN: (纸本)9781538683392

Sub-Nyquist sampling is a common means of interfering with inverse synthetic aperture radar (ISAR) imaging, which has been validated for the feasibility of sub-Nyquist sampling jamming against ISAR imaging in down range domain. In order to generate more false target images, taking sub-Nyquit sampling in both domains to get false target image array is proposed in this framework. The jamming signals, which are formed by the intercepted radar signals under the sub-Nyquist sampling theorem and scattered by moving targets, are collected by ISAR to obtain final images show that the deceptive false-target images retaining the real target information will be induced. Simulated trails and real data of a Yak-42 plane are used to validate the correctness of the analyses and the finally well-focused false-target images greatly support the effectiveness of the sub-Nyquist sampling idea in the countermeasures of ISAR. © 2018 IEEE.

关键词： Inverse synthetic aperture radar

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Heat leakage analysis on peltier current leads with constant and varying cross sections

Heat leakage analysis on peltier current leads with constant...

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2018 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2018

作者： Liu, Ming Chuang Wang, Yin Shun Dai, Shao Tao State Key Lab. of New Energy Renewable Power System North China Electric Power University Beijing China Applied Superconductivity Technology Research Center Beijing Jiaotong University Beijing China

ISBN: (纸本)9781538624944

Current leads are the major heat leakage source in superconducting devices and largely affect the efficiency of the superconducting system operation. Peltier current lead (PCL), a combination of thermoelectric material (BiTe) with the conventional copper lead in the room-temperature end, is effective to reduce heat leakage. Due to the Peltier effect, the thermoelectric material can pump out the heat from the low temperature side to the room temperature side. In this paper we propose PCLs with constant and varying cross sections and simulated the heat leakage on PCLs by using COMSOL simulations. The simulated results show that the PCL with varying cross section can reducing heat leakage of 10% which compares to the constant cross sections. © 2018 IEEE.

关键词： Room temperature

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