检索结果-内蒙古大学图书馆

32nd European Modeling and simulation Symposium, EMSS 2020

作者： Zhang, Chunyu Wang, Shouxiang Zhou, Yanan Zu, Guoqiang Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin300072 China Tianjin Key Laboratory of Power System Simulation and Control Tianjin University Tianjin300072 China Tianjin Electric Power Company Tianjin300072 China Tianjin Electric Power Research Institute Tianjin300072 China

ISBN: (纸本)9788885741454

With the development of distributed generations, the related real-time simulation technology has drawn extensive attention. In the distributed generation units, the power electronics are critical parts. In order to better deal with challenges of the large number of power electronic devices connected to the distribution network, this paper presents an embedded real-time simulation model based on associated discrete circuit (ADC) for a three-phase voltage source inverter. This model can be implemented in a field-programmable gate array (FPGA). And the FPGA can reduce the computational burden of power electronics simulation, because of its powerful parallel computing performance. First of all, a grid-connected power electronic inverter with a three phase RL filter model is built based on the ADC modeling approach, which can enhance the small step simulation performance. Secondly, the phase-locked loop technology has been introduced into the system to track the information of the phase angle. Finally, a FPGA based voltage and current double loop control method is presented to ensure the stable operation. The circuit simulation results verify the effectiveness of the scheme. © 2020 The Authors.

关键词： Circuit simulation

来源：评论

学校读者我要写书评

暂无评论

Seismic Interpolation Transformer for Consecutively Missing Data: A Case Study in DAS-VSP Data

arXiv

引用

arXiv 2024年

作者： Cheng, Ming Lin, Jun Dong, Xintong Lu, Shaoping Zhong, Tie College of Instrumentation and Electrical Engineering Jilin University Jilin Changchun130026 China School of Earth Sciences and Engineering Sun Yat-Sen University Guangdong Guangzhou510275 China Guangdong Zhuhai519000 China Guangdong Provincial Key Lab of Geodynamics and Geohazards Sun Yat-sen University Guangdong Guangzhou510275 China Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Jilin132012 China Department of Communication Engineering College of Electric Engineering Northeast Electric Power University Jilin132012 China

Distributed optical fiber acoustic sensing (DAS) is a rapidly-developed seismic acquisition technology with advantages of low cost, high resolution, high sensitivity, and small interval, etc. Nonetheless, consecutively missing cases often appear in real seismic data acquired by DAS system due to some factors, including optical fiber damage and inferior coupling between cable and well. Recently, some deep-learning seismic interpolation methods based on convolutional neural network (CNN) have shown impressive performance in regular and random missing cases but still remain the consecutively missing case as a challenging task. The main reason is that the weight sharing makes it difficult for CNN to capture enough comprehensive features. In this paper, we propose a transformer-based interpolation method, called seismic interpolation transformer (SIT), to deal with the consecutively missing case. This proposed SIT is an encoder-decoder structure connected by some U-shaped swin-transformer blocks. In encoder and decoder part, the multi-head self-attention (MSA) mechanism is used to capture global features which is essential for the reconstruction of consecutively missing traces. The U-shaped swin-transformer blocks are utilized to perform feature extraction operations on feature maps with different resolutions. Moreover, we combine the loss based on structural similarity index (SSIM) and L1 norm to propose a novel loss function for SIT. In experiments, this proposed SIT outperforms U-Net and swin-transformer. Moreover, ablation studies also demonstrate the advantages of new network architecture and loss function. Copyright © 2024, The Authors. All rights reserved.

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

A remote test method for power grid security and stability control system and its engineering application

A remote test method for power grid security and stability c...

引用

作者： Qi Guo Yihua Zhu Dongxu Chang Shengnan Li Yong Chen Mingkang Wu State Key Laboratory of HVDC Electric Power Research InstituteChina Southern Power Grid Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System CSG Key Laboratory for Power System Simulation Electric Power Research InstituteChina Southern Power Grid Electric Power Research Institute Ltd.of Yunnan Power Grid Co.

Security and stability control(SSC) system or special protection system(SPS) is an important means to ensure the safe operation of power grid. In view of the insufficiency that the current open-loop testing method cannot fully test the SSC system on-site, a remote real-time closed-loop test method is proposed. The solutions of key techniques such as information interaction, remote communication and signal conversion in remote test system are studied. Then the platform architecture and standard interface of the remote test system are designed. A remote test platform for SSC system is developed, and there application modes of the platform is deeply analysed. Finally, taking SSC system of Yunnan AC power outgoing grid as pilot application, experiment of two substations on-site is carried out. The results in practical project further prove the effectiveness of the method presented in this paper.

关键词： Security and stability control system Real-time simulation Power communication network Remote closed loop test

来源：评论

学校读者我要写书评

暂无评论

DC fault ride-through for wind power integration via MMC-HVDC based on precise control of energy storage configured inside wind farm

DC fault ride-through for wind power integration via MMC-HVD...

引用

Renewable Power Generation and Future Power systems Conference 2023 (RPG 2023 UK)

作者： Y. Sun Y. Guo F. Fan J. Fan G. Li Z. Wang X. Wu Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin People's Republic of China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin People's Republic of China Department of Electronic and Electrical Engineering University of Strathclyde Glasgow UK State Grid Smart Grid Research Institute Beijing People's Republic of China

The modular multilevel converter-based high voltage direct current (MMC-HVDC) overhead lines transmission scheme is the preferred option for wind power integration, though it is susceptible to DC faults. To ensure the connection of a wind farm (WF) to the grid during DC faults, this paper proposes a coordinated control strategy for DC fault ride-through (FRT) based on the energy storage system configured inside the WF for wind power integration through a bipolar MMC-HVDC. In the case of an instantaneous DC fault, the non-fault pole is regulated to operate at full power state to maximise wind power transmission. The exceedance of available wind power outputs over the transmission capacity of the non-fault pole is then accurately allocated to the internal energy storage units (ESUs) of wind generators (WGs) in order to ensure the power balance of the system and reduce the state of charge variance of ESUs as soon as possible. In order to reduce the energy capacities of ESUs required to store the excessive wind power in the event of a permanent DC fault, the method of step-by-step removing WGs is adopted to ensure the system power remaining balanced when the internal ESUs of the disconnected WGs are out of operation. The model is developed and carried out on the PSCAD/EMTDC simulation platform to verify the effectiveness of the proposed control strategies.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Feasibility analysis of single-end equivalent modeling to LCC-HVDC transimission system 4

Feasibility analysis of single-end equivalent modeling to LC...

引用

4th IEEE Conference on Energy Internet and Energy system Integration, EI2 2020

作者： Wang, Bin Li, Zhizhong Guo, Qi Liu, Zhijiang Li, Shuyong Cui, Liu Tsinghua University Dept. of Electrical Engineering Beijing China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China National Energy Power Grid Technology RD Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781728196060

The commutation failures seriously threaten the safe operation of hybrid AC/DC grid. Considering that commutation failure occurs only on the inverter side, it is very important to study the voltage controlled current source model of LCC HVDC single terminal measurement information with high equivalent accuracy, which is very important for the practicality of real-time electromagnetic transient simulation of LCC HVDC dynamic phasor model. In order to this problem, this paper further discusses the single terminal equivalent model of LCC HVDC system which does not depend on the measurement information of DC sending end AC system, and explores the estimation method of single terminal fast transient response of complex AC/DC coupling faults induced by AC side fault of LCC HVDC inverter station and participation of DC control separation. The error distribution of single terminal equivalent calculation is quantitatively analyzed to lay a foundation for the follow-up protection and control technology research. © 2020 IEEE.

关键词： Electric inverters

来源：评论

学校读者我要写书评

暂无评论

Dc-Side Synchronous Active Power control of Two-Stage Photovoltaic Generation for Frequency Support in Islanded Microgrids

SSRN

引用

SSRN 2022年

作者： Zhong, Cheng Zhou, Yang Chen, Jikai Liu, Zhanjie Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China State Grid Shandong Weihai Electric Power Co. Ltd Weihai China State Grid Energy Research Institute Co. Ltd Beijing102209 China

Virtual synchronous generator control (VSG) is an attractive method for the grid-tied inverter to provide inertia and frequency support. However, it brings some troubles on DC-link voltage control when it is applied to two-stage photovoltaic (PV) power generation. This study proposes a DC-Side synchronous active power control for two-stage photovoltaic (PV) power generation without energy storage. Synchronous active power control l is applied to DC-DC converters, while the grid-tied inverter still maintains the DC-link voltage constant. The DC-DC converters flexibly regulate active power to provide the simultaneous inertial and primary frequency response like a synchronous generator. A simple sensorless iterative maximum power estimation method is introduced and integrated into the DC-side VSG strategy. The maximum available power under variable irradiance conditions can be obtained. The effectiveness and advantages of the control strategy are validated through case studies on an island microgrid that included PV generations with a DC-bus collection system. © 2022, The Authors. All rights reserved.

关键词： Power control

来源：评论

学校读者我要写书评

暂无评论

Role of Black Carbon in Modulating Aerosol Direct Effects Driven by Air Pollution controls During 2013-2017 in China

SSRN

引用

SSRN 2022年

作者： Zhang, Fenfen Xing, Jia Ding, Dian Wang, Jiandong Zheng, Haotian Zhao, Bin Qi, Ling Wang, Shuxiao State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China Institute for Atmospheric and Earth System Research Faculty of Science University of Helsinki Helsinki00014 Finland School of Atmospheric Physics Nanjing University of Information Science and Technology Nanjing210044 China School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing100083 China

Aerosol direct effects (ADEs) can modulate shortwave radiation as well as atmospheric dynamics and air quality. As the key absorbing component of aerosol, the black carbon (BC) largely determines the aerosol optical properties. Therefore, it is expected that BC emission controls might gain co-benefits from the simultaneous reduction of ADEs. To demonstrate such synergy, we quantified the ADEs changes and role of BC controls in China during 2013-2017 using a regional two-way coupled meteorology chemistry transport model. Results suggest that the control action effectively reduced wintertime PM2.5 concentration (-26.0 μg m-3) and associated ADEs. The influence of ADEs on surface shortwave radiation, 2-meter temperature, and planetary boundary layer height was weakened from -16.7 W m-2, -0.20°C, and -15.4 m in 2013 to -11.3 W m-2, -0.06°C, and -10.7 m in 2017, respectively. The enhancement of SO2, NO2, and PM2.5 concentrations due to ADEs was reduced from +3.1%, +5.2%, and +5.4% in 2013, to +2.6%, +4.5%, and +3.3% in 2017, respectively, demonstrating the extra benefit of air pollution controls by reducing ADEs. The BC emission reduced by 12.5% simultaneously along with the effective controls during 2013-2017. Such BC controls contributes 15.6-60.2% of such changes in the ADEs influence on meteorological variables, and 32.6-41.1% on air pollutants. More specially, the effectiveness of collaborative reduction of BC further reduced surface shortwave radiation in China by 3.6 W m-2 in January and 1.0 W m-2 in July, leading to a more weakened ADEs that bring extra benefits in reducing PM2.5 concentrations by 1.8 μg m-3 in January and 0.3 μg m-3 in July. Apparently, BC played a dominant role in modulating the ADEs and associated influences on meteorology and air quality, suggesting a wise control strategy by targeting absorbing component of PM2.5 reduction to address both air pollution and climate change in the future. © 2022, The Authors. All rights reserved.

关键词： Air quality

来源：评论

学校读者我要写书评

暂无评论

Retrofitting coal-fired power plants with biomass co-firing and CCS for net zero carbon emission:A plant-by-plant assessment based on GIS-LCA framework

Retrofitting coal-fired power plants with biomass co-firing ...

引用

第一届全国碳中和与绿色发展大会

作者： Rui Wang Shiyan Chang Xueqin Cui Jin Li Linwei Ma Amit Kumar Yaoyu Nie Wenjia Cai Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTs International Joint Laboratory on Low Carbon Clean Energy Innovation Tsinghua UniversityBeijingChi State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC) School of Enviro State Key Laboratory of Power Systems Department of Thermal EngineeringTsinghua-BP Clean Energy Cen Department of Mechanical Engineering 10-263 Donadeo Innovation Centre for EngineeringUniversity of Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTs

The targets of limiting global warming levels below 2℃ or even 1.5℃ set by Paris Agreement heavily rely on bioenergy with carbon capture and storage(BECCS),which can remove carbon dioxide in the atmosphere and achieve net zero greenhouse gas(GHG)*** and coal co-firing with CCS is one of BECCS technologies,as well as a pathway to achieve low carbon transformation and upgrading through retrofitting coal power ***,few studies have considered co-firing ratio of biomass to coal based on each specific coal power plant's characteristic information such as location,installed capacity,resources allocation and logistic ***,there is a need to understand whether it is worth retrofitting any individual coal power plant for the benefit of GHG emissions *** is also important to understand which power plant is suitable for retrofit and the associated co-firing *** order to fulfill this gap,this paper develops a framework to solve these questions,which mainly include three ***,biomass resources are assessed at 1-km spatial resolution with the help of RS-GIS ***,by setting biomass collection points and linear program model,resource allocation and supply chain for each power plants are ***,assessing the life-cycle emission for each power *** this study,Hubei Province in China is taken as the research area and study *** main conclusions are as follows:(1)biomass co-firing ratio for each CCS coal power plant to achieve carbon neutral is between 40%~50%;(2)lower co-firing ratio sometimes may obtain better carbon emission reduction benefits;(3)even the same installed capacity power plants should consider differentiated retrofit strategy according to their own *** on the results and analysis above,retrofit suggestions for each power plant are made in the discussion.

关键词： Net zero carbon emission,coal-fired power plant,biomass co-firing GIS-LCA,supply chain,CCS

来源：评论

学校读者我要写书评

暂无评论

The research of configuration for stability control device in smart substation

The research of configuration for stability control device i...

引用

作者： Ye He Binjiang Hu Dongxu Chang Jie Zhang Lingfang Li Yixuan Chen Power Planning and Research Center Yunnan Power Grid Co. Ltd. State Key Laboratory of HVDC Electric Power Research InstituteChina Southern Power Grid Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System CSG Key Laboratory for Power System Simulation Electric Power Research InstituteChina Southern Power Grid

A unified specification to design and operate the stability control device in smart substation has not been formed yet, which has greatly affected the promotion and application of stability control device in smart substation. Thus, referring to the technical specifications of protection device and combining to the specificity of stability control device, a full and detailed configuration scheme is proposed to meet the requirement, including the device configuration principle, the access configuration of SV and GOOSE for variable primary connection types,the virtual terminal and soft switch. This solution is beneficial to standardize the R＆D of stability control device in smart substation, and to facilitate on-site debugging, operation and maintenance.

关键词：

来源：评论

学校读者我要写书评

暂无评论

气候变化情景下中国因高温造成的劳动生产力损失预估

引用

Science Bulletin 2023年第22期68卷 2827-2837,M0006页

作者：程亮亮谷魁英赵亮王会滨纪思翰刘钊黄建斌陈艺丹高学杰徐影王灿罗勇蔡闻佳宫鹏梁万年黄存瑞 School of Public Health Sun Yat-sen UniversityGuangzhou 510080China Vanke School of Public Health Tsinghua UniversityBeijing 100084China State Key Laboratory of Numerical Modelling for Atmosphere Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China School of Linkong Economics and Management Beijing Institute of Economics and ManagementBeijing 100102China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100084China Climate Change Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China National Climate Centre China Meteorological AdministrationBeijing 100081China Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingInstitute for Global Change StudiesTsinghua UniversityBeijing 100084China Department of Earth Sciences and Department of Geography University of Hong KongHong Kong 999077China Institute of Healthy Chin1 Tsinghua UniversityBeijing 100084China

气候变化背景下,高温会影响职业人群的工作效率并造成劳动生产力损失.本研究基于区域气候模式并采用本土化的暴露-反应函数,预估了未来气候变化情景下中国因高温造成的劳动时间损失.研究发现,与基线期的213亿小时高温相关劳动时间损失相... 详细信息

气候变化背景下,高温会影响职业人群的工作效率并造成劳动生产力损失.本研究基于区域气候模式并采用本土化的暴露-反应函数,预估了未来气候变化情景下中国因高温造成的劳动时间损失.研究发现,与基线期的213亿小时高温相关劳动时间损失相比,到21世纪末在RCP2.6、RCP4.5和RCP8.5情景下,损失将分别增加-17.8%、10.8%及121.1%.损失主要集中在华南、华中和华东地区,其中广东与河南将占到全国总损失的四分之一.因为这些区域的温度将更高、人口更密集、户外工作者在总人群中的比例较大.与RCP2.6、RCP4.5和RCP8.5情景相比,若能实现1.5℃温控目标,将分别能够避免11.8%、33.7%和53.9%的劳动时间损失,相当于避免了全中国21世纪中叶的0.1%、0.6%及1.4%的年均GDP损失.本研究显示未来气候变化会给中国造成严重的热相关劳动生产力损失,并强调亟需采取因地制宜的气候减缓及适应策略以保护职业人群健康.本研究对其他与中国相似的发展中国家同样具有重要意义.

关键词： Climate change Heat stress Labor Work hours lost Occupational health

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：