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2021 IEEE Sustainable Power and Energy Conference, iSPEC 2021

作者： Lu, Yuanhong Guo, Qi Liu, Zhijiang Li, Shuyong Guo, Haiping Zeng, Guanming China Southern Power Grid State Key Laboratory of Hvdc Electric Power Research Institute Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Prov. Key Laboratory O F Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute Guangzhou China

ISBN: (纸本)9781665414395

At present, in the research on virtual and real loops of control and protection systems, scholars at home and abroad are mainly focusing on the field of AC digital substations, and there is less research on the virtual and real loops of UHV dC control and protection systems. Aiming at this problem, this paper proposes an automatic construction and correlation method for virtual and real loops of UHV dC control and protection system. This method automatically constructs the real circuit by analyzing the design drawings and the optical cable inventory, analyzing the dC visualization program to automatically construct the virtual circuit, and then automatically correlates the virtual and real circuits based on the graph depth traversal algorithm. The practical application in UHV dC engineering shows that this method can help relevant personnel complete the automatic construction and correlation of virtual and real loops, and improve the convenience of operation and maintenance of the UHV dC control and protection system. © 2021 IEEE.

关键词： Correlation methods

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Conflict Mechanism Analysis Method for Electric Vehicles Participating in Multiple Types of Power Grid Ancillary Services

Conflict Mechanism Analysis Method for Electric Vehicles Par...

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International Conference on Power system Technology (POWErCON)

作者： Yinjuan Xue Qifang Chen Haiqing Cai Mingchao Xia Haohan Gu School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of HVDC Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid National Energy Power Grid Technology R&D Centre Electric Power Research Institute China Southern Power Grid Guangzhou China

As the high-quality flexible resource of the grid, electric vehicles (EVs) can provide multiple auxiliary services for the grid at the same time. However, due to the one-way charging and discharging of EVs, as well as the limitation of power and capacity, which may cause availability conflicts when EVs participate in different auxiliary services simultaneously. This paper focuses on the analysis of the conflict mechanism of EVs participating in the secondary frequency regulation and peak shaving ancillary services at the same time. The impact mechanism between different auxiliary services in this conflict mode is revealed from the two aspects of limit conflict and charging and discharging instruction conflict, and the results of availability conflict of the two types of auxiliary services are verified and analyzed through simulation examples.

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Active Support Performance Test of Grid-connected Photovoltaic system Based on Grid-forming control

Active Support Performance Test of Grid-connected Photovolta...

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intelligent Power and systems (ICIPS), International Conference on

作者： Xinze Xi Yun Hu Chao Xing Qi Guo Shoudong Xu Liang Tu Peng He Yihua Zhu Mingzhang Su Chao Luo Yunnan Electric Power Research Institute Kunming China National Energy Power Grid Technology R&D Centre Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute CSG Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

With the continuous increase penetration of new energy, the integration of grid-following (GFL) converter is prone to frequency stability issue, while the utilization of grid-forming (GFM) converter with active support capability has become an inevitable trend in development. In this paper, the model of grid-connected photovoltaic system using GFL/GFM control is established. The support characteristic of GFM is compared and analyzed in different testing scenarios with GFL as the reference: (1) Small disturbance test (2) Large disturbance test (3) Island capability test. Finally, the active support performance of the system is quantitatively analyzed based on corresponding evaluation indexes.

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design and Implementation of Telemedicine system Using Light Fidelity and PIC16F877A Microcontroller

Design and Implementation of Telemedicine System Using Light...

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International Conference on Information Science and Technology (ICIST)

作者： M.r. Ezilarasan Man-Fai Leung Xiangguang dai Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Instituteof Science and Technology Chennai India Faculty of Science and Engineering School of Computing and Information Science Anglia Ruskin University Cambridge United Kingdom Key Laboratory of Intelligent Information Processing and Control of Chongqing Municipal Institutions of Higher Education Chongqing Three Gorges University Wanzhou Chongqing China

ISBN: (数字)9798350353334

ISBN: (纸本)9798350353341

Medical Body Area Networks (MBANs) increasingly utilize wireless communication technologies to enhance the freedom and convenience for patients and caregivers. Currently, radio frequency (rF) is the prevalent medium in healthcare applications; however, the potential for electromagnetic interference with precision medical equipment remains a concern. This study introduces a novel design and implementation of a medical healthcare information system using the newly developed Wireless Visible Light Communication (VLC) technology, also known as Light Fidelity (Li-Fi). Visible Light Emitting diodes (LEds), expected to soon surpass traditional incandescent and fluorescent bulbs as the primary light source due to their energy efficiency, facilitate this technology. In this research, patient health is monitored using sensors, with results displayed on an LCd. An LEd lightbulb transmits the data as light signals, which are captured by a photo-detector at the receiver's end. This setup not only displays the output on an LCd but also alerts caregivers through an auditory signal, beeping every 15 seconds for respiration and every 30 seconds for heart rate monitoring. Moreover, these lighting fixtures serve dual functions: illumination and wireless data transmission, using the rapid switching capability of LEds. This prototype VLC-based system offers a promising alternative for data services and monitoring in hospital areas where rF use is restricted.

关键词： Wireless communication radio frequency Wireless sensor networks Lighting Light emitting diodes Light fidelity Liquid crystal displays Communication system security Monitoring Visible light communication

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Comparison of decoupling Methods for Electrostatic Signals from Gas-Solid Two-Phase Flow

Comparison of Decoupling Methods for Electrostatic Signals f...

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第34届中国控制与决策会议

作者： Zhang Jingyu Li Yajun Liu Kun Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin University of Technology and Education R&D department Beijing HuayunShangtong Technology Co.Ltd State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences

The measuring signals from inner flush-mounted electrostatic sensors are composed of both induced and transferred charge *** time domain and frequency spectrums of those two signals were *** the signal decoupling method based on empirical mode decomposition(EMd) and frequency domain transform was proposed and *** signal decoupling method based on frequency domain transform could decompose the measuring signal more effectively than the EMd decoupling method,which had an advantage in cross-correlation velocity measurement.

关键词： Electrostatic sensor Inner flush-mounted electrode Gas-solid two-phase flow Empirical mode decomposition(EMd)

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The development of high performance in hybrid sic power integrated module (Pim)

The development of high performance in hybrid sic power inte...

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International Exhibition and Conference for Power Electronics, intelligent Motion, renewable Energy and Energy Management, PCIM Europe 2020

作者： Chang, J.Y. Fun, S.Y. Wu, S.T. Leu, F.J. Lo, Y.Y. Chiu, P.K. Yu, T.J. Wu, H.L. Han, W.K. Tzeng, C.M. Hsu, S.F. Kao, K.S. Lin, H.H. Chang, T.C. Yamauchi, S. Anai, K. Jo, J.L. Sakaue, T. Intelligent Power Module & System Department Electronics and Optoelectronics system Research Laboratories Industrial Technology Research Institute Taiwan Engineered Materials Sector R&D Center Mitsui Mining & Smelting Co. Ltd Japan

ISBN: (纸本)9783800752454

due to wide bandgap electronic with high-speed exchange rate can efficiently improve the dynamic characteristics of the machine tool system. The high thermal conductivity of SiC can be applied to more than 10 kW of high power systems, which made it highly efficient, high temperature resistant and reliability. In this study, 1200V/100A hybrid SiC power integrated module (PIM) was designed and manufactured in ITrI. Through the thermal, electrical and stress simulation, the power module was designed to meet the function improvement and reliability. This study accomplished the different height of multi-chip simultaneous Cu sintering. © VdE VErLAG GMBH · Berlin · Offenbach.

关键词： Silicon carbide

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Mechanism and Influencing Factor Analysis of High Frequency Oscillation in PMSG-Based Wind Farm With Grid-Connected system

Mechanism and Influencing Factor Analysis of High Frequency ...

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IEEE International Conference on Energy Internet (ICEI)

作者： Chao Luo Yihua Zhu Libin Huang Jiawei Yu State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China

Under the background of vigorously developing wind power, permanent magnet synchronous generator (PMSG)-based wind turbines have been widely used in offshore wind farms. However, the high frequency oscillations (HFOs) of PMSG-based wind farms with grid-connected system have occurred frequently in recent years, which have a bad impact on the safe and stable operation of the power system. And current researches only preliminarily reveal the mechanism, which are lacking in discussion on the key factors involved in HFOs. This paper establishes the high frequency impedance model of PMSG-based wind farm with grid-connected system. To identify the key factors involved in HFO, the impedance sensitivity method is used to obtain the quantitative relationship of the influence of each parameter on HFO. It can be concluded that the control delay, LCL filter parameters, collector lines parameters have the greatest influence on the HFO of the wind farm, but the characteristic of negative resistance caused by control delay is the root cause of HFO. Finally, this paper establishes the model of PMSG-based wind farm with grid-connected system on the PSCAd/EMTdC and verifies the correctness of the theoretical analysis. The conclusions of this paper can provide a reference basis for the mitigation strategies of HFOs.

关键词： Wind energy generation Analytical models Sensitivity Wind farms Hafnium oxide Synchronous generators delays

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Cyber-Attack risk Assessment and Prevention Strategy of Substations Based on dynamic Attack and defense Game

Cyber-Attack Risk Assessment and Prevention Strategy of Subs...

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Power system and Green Energy Conference (PSGEC)

作者： Feng Lin Yong Mei Yihua Zhu dongxu Chang ren Liu Hengdao Guo Power Dispatch and Control Center China Southern Power Grid GuangZhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid GuangZhou China National Energy Power Grid Technology R&D Centre Electric Power Research Institute China Southern Power Grid GuangZhou China CSG Key Laboratory for Power System Simulation China Southern Power Grid GuangZhou China Guangdong Provincial Key Laboratory of Intelligent Operation & Control for New Energy Power System GuangZhou China

With the improvement of the informatization of the power system, the risk of cyber attack is also increasing. This paper proposes a risk assessment and prevention strategy for cyber attack against substations. Firstly, the cyber attack against substations are modeled based on the game theory of dynamic attack and defense. Secondly, an improved OPA (OrNL-PSErC-Alaska) model is utilized to analyze the cascade failure after cyber attacks and quantify the load loss of power system. Finally, a preventive strategy which can mitigate the expectation load loss caused by cyber attack against substations is put forward. Simulation experiments were conducted to validate the effectiveness of the proposed method.

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Physics-Guided Hierarchical reward Mechanism for Learning-Based robotic Grasping

arXiv

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arXiv 2022年

作者： Jung, Yunsik Tao, Lingfeng Bowman, Michael Zhang, Jiucai Zhang, Xiaoli Colorado School of Mines Intelligent Robotics and System Lab GoldenCO80401 United States Cancer Biology Department of University of Pennsylvania the Bowman Lab PhiladelphiaPA19104 United States GAC R&D Center Silicon Valley SunnyvaleCA94085 United States

Learning-based grasping can afford real-time grasp motion planning of multi-fingered robotics hands thanks to its high computational efficiency. However, learning-based methods are required to explore large search spaces during the learning process. The search space causes low learning efficiency, which has been the main barrier to its practical adoption. In addition, the trained policy lacks a generalizable outcome unless objects are identical to the trained objects. In this work, we develop a novel Physics-Guided deep reinforcement Learning with a Hierarchical reward Mechanism to improve learning efficiency and generalizability for learning-based autonomous grasping. Unlike conventional observation-based grasp learning, physics-informed metrics are utilized to convey correlations between features associated with hand structures and objects to improve learning efficiency and outcomes. Further, the hierarchical reward mechanism enables the robot to learn prioritized components of the grasping tasks. Our method is validated in robotic grasping tasks with a 3-finger MICO robot arm. The results show that our method outperformed the standard deep reinforcement Learning methods in various robotic grasping tasks. © 2022, CC BY-NC-Nd.

关键词： reinforcement learning

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Environmental consequences of an ultra-low emission retrofit in coal-fired power plants from a life cycle perspective

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Waste disposal and Sustainable Energy 2021年第4期3卷 309-323页

作者： Jun dong Yuanjun Tang Aizhong ruan Jie Chen Xiaoqing Lin Shengyong Lu Xiang Gao State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Zhejiang Energy R&D Institute Co. Ltd.Hangzhou 311121China Key Laboratory of Energy Conservation and Pollutant Control Technology for Thermal Power of Zhejiang Province Hangzhou 311121China Department of Energy and Environment System Engineering Zhejiang University of Science and TechnologyHangzhou 310023China Zhejiang Shengyuan Environmental Testing Technology Co. Ltd.Shaoxing 311899China

To make coal-fired power generation more environmentally friendly,China has initiated a series of ultra-low emission ret-rofits to the air pollution control(APC)system of the existing power *** this study,a life cycle assessment(LCA)is conducted to analyze the environmental net benefits for the typical ultra-low emission retrofit of a 1000 MW power *** key processes,substances,and APC devices are verified and *** results confirm that the retrofit effectively decreases the environmental stress of acidification potential(AP),eutrophication potential(EP),and photochemical ozone creation potential(POCP)by 69%-79%,which can be attributed to significantly reduced emissions at the ***,the retrofit has also increased other impact categories by 24%-79%,primarily due to the consumption of additional elec-tricity and *** retrofit of selective catalytic reduction,electrostatic precipitator(ESP),and wet limestone flue gas desulfurization devices has a dominant effect on the impacts of EP,human toxicity potential(HTP),and AP.A newly installed wet ESP shows some environmental benefits(only for AP),but causes considerable burdens,in particular for the investigated impact categories global warming potential(GWP),marine aquatic ecotoxicity(MAETP),and abiotic depletion fossil(AdP fossil).The obtained results indicate that the hidden environmental consequences,which are associated with the production of energy and materials,need to be examined more comprehensively to inform the development of ultra-low emission technologies and strategies effectively.

关键词： Ultra-low emission retrofit Life cycle assessment Air pollution control system Coal-fired power plants Environmental impacts

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