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19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Zhang, Qingtao Gao, diju Zhang, dan Cai, Haiqing Gu, Haohan Chen, Wei Wu, Wencong Chen, Zhihao Institute of Logistics Engineering Shanghai Maritime University Shanghai China Institute of Logistic Science and Engineering Shanghai Maritime University Shanghai China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System 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 Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9789819608966

With the further development of "double high" characteristics of power system, the traditional stability problem dominated by synchronous generator has gradually evolved into a new stability problem dominated by power electronic equipment control. In addition, different types of failure problems can occur in wind power systems. In order to achieve multi-objective coordinated and stable operation of high proportion wind power system, a damping control method with parameters tuning is proposed, which includes the design of filtering link and proportional amplification link. Among them, the key parameters of the proportional link are adjusted. Finally, the feasibility of the proposed control method is verified by simulation tests. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Electric power system stability

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Network View and Cognitive Mechanism for Virtual Network resource Management Based Intelligent

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Chinese Journal of Electronics 2025年第3期23卷 574-578页

作者： Xiaochun Wu Chunming Wu Bin Wang Yaguan Qian Julong Lan Computer Science College Zhejiang University Hangzhou China Institute of Network and Communication Engineering Zhejiang Gongshang University Hangzhou China National Digital Switching System Engineering & Technology R&D Center Zhengzhou China

Network virtualization has been a particularly important driving force behind the development of NGN. Finding effective ways to control self-adapting virtual networks has become a research hot spot. This paper tries to find an efficient way in combining dynamic resource sensing with traffic character and requirements in virtual network, based on that an intelligent cognition based virtual network resources management model has been put forward. We design a network topology view by coloring network topology matrix with current resources model. We present an intelligent virtual resource management mechanism based on the proposed network topology view. Experiment results illustrate that the proposed mechanism can improve VN capacity by automatic resource adjust-ment, which can obtain high utilization of VN resources without increasing computational expenses.

关键词： Technological innovation Network topology Computational modeling Force dynamics Network resource management dynamic scheduling Sensors Virtualization Next generation networking

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Advanced Out-of-Step Splitting Protection Simulation Platform with Considering High Frequency Generation Tripping and Low Frequency Load Shedding

Advanced Out-of-Step Splitting Protection Simulation Platfor...

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2022 IEEE International Conference on Power systems and Electrical Technology, PSET 2022

作者： Liu, ren Zhu, Yukun Zhu, Yihua Chang, dongxu Wu, Mingkang Huang, Libin a. State Key Laboratory of HVDC b. National Energy Power Grid Technology R&D Centre c. Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System d. CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781665489157

This paper presents an advanced out-of-step (OOS) splitting protection simulation platform considering high frequency generation tripping and low frequency load shedding. In the proposed simulation platform, real-Time digital Simulator (rTdS) is utilized as the real-time power system simulator. Through the high-speed I/O card, real industry OOS splitting protection device is integrated into the proposed simulation platform. Based on the real China South Power Grid (CSG) control strategy, high frequency generation tripping and low frequency load shedding components are modelled in the simulation. CSG real grid is modelled in the rTdS to perform the real-time hardware-in-the-loop simulation. Simulation results present that there is a clear difference between with high frequency generation tripping results and without high frequency generation tripping results. © 2022 IEEE.

关键词： Simulation platform

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Analysis of the Interconnection Capacity Calculation Methodologies for the European Electricity Market

Analysis of the Interconnection Capacity Calculation Methodo...

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2023 IEEE International Conference on Power Science and Technology, ICPST 2023

作者： Cartaxo, ricardo Casaleiro, Ângelo E Silva, Nuno Souza Pastor, ricardo Chao, Xia Han, Bin Cai, Zhi da Silva, Nuno Pinho R&D Nester - Centro de Investigação em Energia REN - State Grid S.A Sacavém Portugal China Electric Power Research Institute Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology Beijing China

ISBN: (纸本)9798350311358

The interconnected European transmission system for electricity supports the electricity trading across Europe, promoting the maximization of welfare, in particular when the interconnection capacity is enough to take low marginal cost generation, namely variable renewable power generation, into the demand areas where it is scarce. Transmission systems operators (TSOs) calculate the available interconnection capacity for the day-ahead and intraday markets in a coordinated way. This is a key step to enable price-based market coupling between different countries and regions and, therefore, efficient use of electricity from renewable energy sources and effective distribution of the benefits of renewable electricity across Europe. This work addresses the calculation of interconnection capacity between bidding zones by analyzing the processes and comparing the different methodologies used by European TSOs to coordinate the capacity calculation and compute the underlying generation shift keys (GSKs). The paper focus on the Portuguese cross-border transmission capacity with Spain, where the merit order methodology defines the GSKs supporting the calculation of the Available Transmission Capacity (ATC) for the spot market. © 2023 IEEE.

关键词： Power markets

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Advances in magnetic-assisted triboelectric nanogenerators:structures,materials and self-sensing systems

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International Journal of Extreme Manufacturing 2024年第5期6卷 162-188页

作者： Pengfan Wu Chenxi Zhao Endian Cui Shiwei Xu Tao Liu Fayang Wang Chengkuo Lee Xiaojing Mu Key Laboratory of Optoelectronic Technology&Systems Ministry of Education International R&D Center of Micro-Nano Systems and New Materials TechnologyChongqing UniversityChongqing 400044People’s Republic of China Department of Electrical and Computer Engineering National University of SingaporeSingaporeSingapore

Triboelectric nanogenerators(TENG),renowned for their remarkable capability to harness weak mechanical energy from the environment,have gained considerable attention owing to their cost-effectiveness,high output,and *** review provides a unique perspective by conducting a comprehensive and in-depth analysis of magnetically assisted TENGs that encompass structures,materials,and self-powered sensing *** systematically summarize the diverse functions of the magnetic assistance for TENGs,including system stiffness,components of the hybrid electromagnetic-triboelectric generator,transmission,and interaction *** the material domain,we review the incorporation of magnetic nano-composites materials,along with ferrofluid-based TENG and microstructure verification,which have also been summarized based on existing ***,we delve into the research progress on physical quantity sensing and human-machine interface in magnetic-assisted *** analysis highlights that magnetic assistance extends beyond the repulsive and suction forces under a magnetic field,thereby playing multifaceted roles in improving the output performance and environmental adaptability of the ***,we present the prevailing challenges and offer insights into the future trajectory of the magnetic-assisted TENGs development.

关键词： triboelectric nanogenerator magnetic assistance tuning structure controlled material preparation self-powered system

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Breast Calcifications and Histopathological Analysis on Tumour detection by CNN

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computer systems Science & Engineering 2023年第1期44卷 595-612页

作者： d.Banumathy Osamah Ibrahim Khalaf Carlos Andrés Tavera romero P.Vishnu raja dilip Kumar Sharma Department of Computer Science and Engineering Paavai Engineering CollegePachalNamakkal637018Tamil NaduIndia Al-Nahrain University Al-Nahrain Nanorenewable Energy Research CenterBaghdadIraq COMBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de Cali76001CaliColombia Department of Computer Science and Engineering Kongu Engineering CollegePerundurai638060Tamil NaduIndia Department of Mathematics Jaypee University of Engineering and TechnologyGuna473226Madhya PradeshIndia

The most salient argument that needs to be addressed universally is Early Breast Cancer detection(EBCd),which helps people live longer *** computer-Aided detection(CAds)/computer-Aided diagnosis(CAdx)sys-tem is indeed a software automation tool developed to assist the health profes-sions in Breast Cancer detection and diagnosis(BCdd)and minimise mortality by the use of medical histopathological image classification in much less *** paper purposes of examining the accuracy of the Convolutional Neural Network(CNN),which can be used to perceive breast malignancies for initial breast cancer detection to determine which strategy is efficient for the early iden-tification of breast cell malignancies formation of masses and Breast microcalci-fications on the *** we have insufficient data for a new domain that is desired to be handled by a pre-trained Convolutional Neural Network of residual Network(resNet50)for Breast Cancer detection and diagnosis,to obtain the discriminative Localization,Convolutional Neural Network with Class Activation Map(CAM)has also been used to perform breast microcalcifications detection tofind a specific class in the Histopathological *** test results indicate that this method performed almost 225.15%better at determining the exact location of disease(discriminative Localization)through breast microcalci-fications ***50 seems to have the highest level of accuracy for images of Benign Tumour(BT)/Malignant Tumour(MT)cases at 97.11%.resNet50’s average accuracy for pre-trained Convolutional Neural Network is 94.17%.

关键词： computer-Aided detection breast cancer detection convolutional neural network class activation map computer-aided diagnosis

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Simulation research on Primary Frequency regulation Coordination Control Strategy of Hybrid Wind-PV-ES Power Station Based on AGC 12

Simulation Research on Primary Frequency Regulation Coordina...

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12th Annual Meeting of CSEE Study Committee of HVdC and Power Electronics, HVdC 2023

作者： Li, Shengnan Hu, Yun He, Xin Zhu, Yihua He, Tingyi Luo, Chao deng, Can Zeng, Guanming Su, Mingzhang 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 GridGuangzhou China

ISBN: (纸本)9781839539848

With the increase of wind and solar renewable energy penetration in power system, the frequency control ability of power system completely depending on traditional power supply has weakened. This actuality requires that renewable energy stations should be equipped with a certain amount of energy storage to improve the primary frequency control ability. This paper considers the fast response ability and flexible control of energy storage for both charging and discharging, as well as its unique frequency response characteristics. Firstly, the control characteristics of the primary frequency regulation of the hybrid wind-solar-storage power station(Wind-PV-ES) are analyzed. By improving the automatic generation control(AGC) strategy of the hybrid Wind-PV-ES power station, a coordinated control strategy for the primary frequency regulation of the hybrid Wind-PV-ES power station is proposed for different frequency ranges based on the improved AGC control. After the primary frequency regulation action, the energy storage output is given priority control before wind and solar. When the energy storage active margin is insufficient, use the frequency regulation capacity of wind and photovoltaic power system to improve the primary frequency regulation capacity of the hybrid Wind-PV-ES power station. The control strategy proposed in this paper can improve the primary frequency regulation capability of renewable energy station. Finally, the paper verifies the effectiveness of the proposed control strategy through simulation. © The Institution of Engineering & Technology 2023.

关键词： Energy storage

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Active Support Performance Test of Grid-connected Photovoltaic system Based on Grid-forming Control 3

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

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3rd International Conference on Intelligent Power and systems, ICIPS 2023

作者： Xi, Xinze Hu, Yun Xing, Chao Guo, Qi Xu, Shoudong Tu, Liang He, Peng Zhu, Yihua Su, Mingzhang Luo, Chao 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

ISBN: (纸本)9798350328691

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. ©2023 IEEE.

关键词： Power converters

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Power Pre-equalization Strategy for Multi-Band Long-Hual Transmission systems and its Application in 800G Networks

Power Pre-equalization Strategy for Multi-Band Long-Hual Tra...

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OptoElectronics and Communications Conference, OECC

作者： Baoluo Yan Yu Zheng Huan Chen Wenbo Yu Zhenhua Feng Hu Shi WDM System Department of Wireline Product R&D Institute ZTE Corp. State Key Laboratory of Mobile Network and Mobile Multimedia Technology Beijing China

An engineering-applicable power pre-equalization strategy with well net system margin control for UWB long-hual transmission is proposed and applied to analyze the performance of a series of 800Gb/s coherent optical t... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Optical losses raman scattering Optical fiber networks reliability engineering Optical pumping Loss measurement real-time systems Optical scattering Ultra wideband technology Signal to noise ratio

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designing of A >1kV Medium-Voltage Line Impedance Stabilization Network

Designing of A >1kV Medium-Voltage Line Impedance Stabilizat...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Tahmid Ibne Mannan Ashik Amin Seungdeog Choi Mostak Mohammad Department of Electrical and Computer Engineering Mississippi State University Starkville USA R&D Staff Oak Ridge National Laboratory Oak Ridge USA

This paper presents a single-stage line impedance stabilization network (LISN) design that can perform medium-voltage (MV) level conducted electromagnetic interference (EMI) measurements. >1kV Wide-bandgap (WBG) devices are widely used in power electronics applications. due to their fasts-witching speeds, they emit considerable common-mode (CM) EMI. However, the state-of-the-art offer does not provide LISN for > 1kV compliance and electromagnetic compatibility (EMC) tests. Thus, designers and engineers face a considerable challenge in performing EMC reliability analysis and tests. This paper analyzes the critical design challenges of >1kV MV LISN, including non-linear parasitic parameter variations at high voltage and frequencies. Proposed LISN’s operational characteristics analysis and CM EMI measurement capabilities have validated the proposed design. Its effectiveness for CM EMI measurement in medium voltage has been verified and compared with a commercial LISN.

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