检索结果-内蒙古大学图书馆

Research on Security and Stability Characteristics and control Strategies of power Grid with VSC-HVDC

Energy Procedia 2018年 145卷 351-356页

作者： Zhu Yihua Li Wei Guo Qi Chang Dongxu Luo Jianbo Wang Yu Li Xueming Li Zhaowei Li Zhukun Li Bijun Key Laboratory of Power System Simulation Electric Power Research Institute China Southern Power Grid Kexiang Road GuangZhou 510080 China Nari Group Corporation(State Grid Electric Power Research Institute) Chengxin Road Nangjing 211106 China Nari Technology Co.Ltd. Chengxin Road Nangjing 211106 China

VSC-HVDC is developed quickly in new energy power transmission field. The characteristics of VSC-HVDC is different from LCC-HVDC, so the traditional control strategies in LCC-HVDC maybe not completely suitable for the power system with VSC-HVDC. In order to guarantee the stable operation of the power grid with VSC-HVDC under serious faults, control strategies should be studied. Combined with the operating characteristics of VSC-HVDC, some response difference between VSC-HVDC and LCC-HVDC is analyzed. And then, the general principles for making the security and stability control strategies of the power grid with VSC-HVDC is proposed. At last, the rationality and effectiveness of the control strategy is validated in an IEEE30 system. The simulation results show that the proposed grid security and stability control strategy is effective for the fault recovery of the power grid with VSC-HVDC.

关键词： VSC-HVDC LCC-HVDC security stability control policy table fault simulation

来源：评论

学校读者我要写书评

暂无评论

Internet information applied in the energy internet planning: A review and outlook

Internet information applied in the energy internet planning...

引用

2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Cheng, Lin Ji, Xinchi Zhang, Fang Liang, Caihao He, Hailei State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Tsinghua University Beijing China China Electric Power Research Institute Beijing China

ISBN: (纸本)9781538614273

With the development of energy industry and infor-mation technologies, the concept of energy Internet is proposed to prevent the energy crisis and reduce the environmental pollution. However, the planning of energy Internet is facing great challenges that there are large uncertainties of boundary conditions in the planning. The collection of Internet information can help solve the problem. This paper introduces the method of collecting objective data from the Internet, such as renewable energy sources data, climate data, and economic data, and the usage of the data for energy Internet planning. The method of collecting and processing fuzzy information from the Internet are introduced as well. The events related to the energy Internet planning can be perceived and be applied to the multi-scenario planning of energy Internet. Besides, the difficulties and outlooks of the usages are given. © 2017 IEEE.

关键词： Internet of Energy

来源：评论

学校读者我要写书评

暂无评论

A Torque Coordination control Strategy for Wind Turbine Based on Pole Placement

A Torque Coordination Control Strategy for Wind Turbine Base...

引用

第37届中国控制会议

作者： Jingchun Chu Ling Yuan Zhenyu Chen Wei Xu Zhongwei Lin Yang Du China Guodian United Power Technology Co.Ltd. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering North China Electric Power University

This paper designs a torque control strategy for the wind turbine generator system(WTGS), which can benefit the conventional pitch control effect coordinately. Due to the characteristic that, the inertia time constant of the torque control loop is quite smaller compared with the pitch control one, further improvement on the pitch control effect can be guaranteed through improving the torque control, which can decrease the pitch operations and reduce fatigue loads. Motivated by this point,through analysing the MIMO linearized WTGS model, the torque control strategy is proposed in forms of state feedback and pole placement in the corresponding sub-state-space model, which also guarantees the stability of the whole system. Furthermore, a PID torque controller is established in order to facilitate this strategy in the practical WTGS control process. Finally, simulation results for a 5 MW wind turbine show the effectiveness of the proposed strategy with two different conventional pitch controllers under the FAST simulator.

关键词： WTGS Variable-Speed ＆ Variable-Pitch（VS-VP） Pole Placement PID control Coordination

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to Anthropogenic emission inventories in China: a review

引用

National Science Review 2018年第4期5卷 603-603页

作者： Meng Li Huan Liu Guannan Geng Chaopeng Hong Fei Liu Yu Song Dan Tong Bo Zheng Hongyang Cui Hanyang Man Qiang Zhang Kebin He Ministry of Education Key Laboratory for Earth System Modeling Department for Earth System Science Tsinghua University Max-Planck Institute for Chemistry State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University State Key Joint Laboratory of Environmental Simulation and Pollution Control Department of Environmental Science Peking University

In the Figure 4 of‘Anthropogenic emission inventories in China:a review’(National Science Review,Volume 4,Issue 6,2017,Pages 834–866,doi:10.1093/nsr/nwx150),the data for the MEIC v1.2 was incorrectly *** corrected ... 详细信息

关键词： a review Figure Corrigendum to Anthropogenic emission inventories in China

来源：评论

学校读者我要写书评

暂无评论

City-specific vehicle emission control strategies to achieve stringent emission reduction targets in China's Yangtze River Delta region

引用

Journal of Environmental Sciences 2017年第1期29卷 75-87页

作者： Shaojun Zhang Ye Wu Bin Zhao Xiaomeng Wu Jiawei Shu Jiming Hao University of Michigan Department of Mechanical EngineeringAnn ArborMI 48109USA Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnuironmentBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Joint Institute for Regional Earth System Science and Engineering Department of Atmospheric and Oceanic SciencesUniversity of CaliforniaLos AngelesCalifornia 90095USA

The Yangtze River Delta（YRD） region is one of the most prosperous and densely populated regions in China and is facing tremendous pressure to mitigate vehicle emissions and improve air *** assessment has revealed that mitigating vehicle emissions of NOx would be more difficult than reducing the emissions of other major vehicular pollutants（e.g.,CO,HC and PM_（2.5）） in the YRD *** in Shanghai,where the emission control implemented are more stringent than in Jiangsu and Zhejiang,we observed little to no reduction in NOx emissions from 2000 to ***-reduction targets for HC,NOx and PM_（2.5） are determined using a response surface modeling tool for better air *** design city-specific emission control strategies for three vehicle-populated cities in the YRD region：Shanghai and Nanjing and Wuxi in *** results indicate that even if stringent emission control consisting of the Euro 6/VI standards,the limitation of vehicle population and usage,and the scrappage of older vehicles is applied,Nanjing and Wuxi will not be able to meet the NOx emissions target by ***,additional control measures are proposed for Nanjing and Wuxi to further mitigate NOx emissions from heavy-duty diesel vehicles.

关键词： Vehicle Emission control Scenario Yangtze River Delta

来源：评论

学校读者我要写书评

暂无评论

Comprehensive Evaluation of Microgrid Planning Scheme based on AHP- Entropy method

Comprehensive Evaluation of Microgrid Planning Scheme based ...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Jun HE XiaoLing YANG Yi LIU WenTao HUANG Jun CHEN DaHu LI Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of Technology Wuhan P. R. China School of Electrical and Electronic Engineering Hubei University of Technology WuHan China Hubei University of Technology WuHan China State Grid Hubei Electric Power Co. Ltd WuHan China

Microgrid has the advantages of low carbon, energy saving and economy. The development direction of distribution network is distribution network with microgrid. In order to evaluate the rationality of microgrid planning comprehensively and scientifically, this paper establishes a comprehensive evaluation index system of microgrid from four aspects: economy, reliability, basic structure of planning and environmental protection. In order to overcome the subjectivity of simple Analytic hierarchy process (AHP), AHP- entropy method is introduced to configure the weights of microgrid indexes, and a comprehensive evaluation method of microgrid planning scheme based on AHP- entropy method is proposed for the first time. Finally, an example of an island microgrid in Zhuhai is taken to verify the feasibility of the proposed method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Lattice kinetic scheme for the Navier-Stokes equations coupled with convection-diffusion equations

引用

Physical Review E 2018年第3期98卷 033308-033308页

作者： Liang Wang Weifeng Zhao Xiao-Dong Wang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China Research Center of Engineering Thermophysics North China Electric Power University Beijing 102206 China Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Eduction North China Electric Power University Beijing 102206 China Department of Applied Mathematics and Mechanics University of Science and Technology Beijing Beijing 100083 China

In this paper, we target two basic issues residing in some modified lattice kinetic schemes for the Navier-Stokes (NS) equations coupled with convection-diffusion equations (CDEs). First, a lattice Boltzmann (LB) model motivated by the lattice kinetic scheme (LKS) is presented for the NS equations coupled with CDEs. Due to the nonequilibrium schemes for the gradient terms contained in the equilibria as well as the discrete source term, the collision process of the present model can be implemented locally in both time and space. The Chapman-Enskog analysis shows that the macroscopic equations can be correctly recovered from the present model without additional assumptions. Second, we prove that the present modified LKS model, though written in the Bhatnagar-Gross-Krook (BGK) form, has two relaxation rates essentially. Based on this theoretical result, the modified lattice kinetic schemes in the literature should not be grouped as the BGK model, and the better numerical stability is intrinsically attributed to the adjustment of their two relaxation rates. Several benchmark thermal flow problems are simulated to validate the present model and the local nonequilibrium schemes for the shear rate and temperature gradient. The accuracy of the present model as well as its better numerical stability compared with the BGK model are verified, which supports our theoretical results. In addition, we also demonstrate that the regularized LB (RLB) model has two relaxation times as the present LKS model.

关键词： Convection Lattice-Boltzmann methods Navier-Stokes equation Rheology

来源：评论

学校读者我要写书评

暂无评论

Fault Diagnosis Method of Circuit Breakers Based on Weighted Fuzzy Petri Nets

引用

IOP Conference Series: Materials Science and Engineering 2019年第1期486卷

作者： Xiaotong Zhang Qing Chen Mengxuan Sun Wudi Huang Wangyuan Gao Key Laboratory of Power System Intelligent Dispatch and Control (Shandong University) Ministry of Education Jinan China State Grid Nanjing Power Supply Company Nanjing China

The maintenance and self-healing of circuit breakers are very difficult when the fault diagnosis results of circuit breakers cannot cover all kinds of fault causes. This paper proposes a method for comprehensively diagnosing circuit breaker faults. The method simulates the action process of circuit breakers based on weighted fuzzy Petri nets and makes it feasible to infer circuit breaker fault causes from different aspects. The model shows the action sequence of the circuit breaker by associating the control mechanism, the operating mechanism, the transmission mechanism and the contact part of the circuit breaker, and each part of it is described with the corresponding abnormal signals of the circuit breaker stored in the substation end. Specific fault reasons of the circuit breaker can be inferred by considering the action sequence and the relationship between the abnormal information and fault causes. The results for some test cases show that this method can obtain the diagnosis results covering various possible fault causes.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Ozone and secondary organic aerosol formation potential from anthropogenic volatile organic compounds emissions in China

引用

Journal of Environmental Sciences 2017年第3期29卷 224-237页

作者： WenJing Wu Bin Zhao Shuxiao Wang Jiming Hao State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Collaborative Innovation Center for Regional Environmental Quality Tsinghua UniversityBeijin9 100084China Joint Institute for Earth System Science and Engineering Department of Atmospheric and Oceanic SciencesUniversity of CaliforniaLos AngelesCA 90095USA.

Volatile organic compounds （VOCs） are major precursors for ozone and secondary organic aerosol （SOA）, both of which greatly harm human health and significantly affect the Earth＇s climate. We simultaneously estimated ozone and SOA formation from anthropogenic VOCs emissions in China by employing photochemical ozone creation potential （POCP） values and SOA yields. We gave special attention to large molecular species and adopted the SOA yield curves from latest smog chamber experiments. The estimation shows that alkylbenzenes are greatest contributors to both ozone and SOA formation （36.0% and 51.6%, respectively）, while toluene and xylenes are largest contributing individual VOCs. Industry solvent use, industry process and domestic combustion are three sectors with the largest contributions to both ozone （24.7%, 23.0% and 17.8%, respectively） and SOA （22.9%, 34.6% and 19.6%, respectively） formation. In terms of the formation potential per unit VOCs emission, ozone is sensitive to open biomass burning, transportation, and domestic solvent use, and SOA is sensitive to industry process, domestic solvent use, and domestic combustion. Biomass stoves, paint application in industrial protection and buildings, adhesives application are key individual sources to ozone and SOA formation, whether measured by total contribution or contribution per unit VOCs emission. The results imply that current VOCs control policies should be extended to cover most important industrial sources, and the control measures for biomass stoves should be tightened. Finally, discrepant VOCs control policies should be implemented in different regions based on their ozone/aerosol concentration levels and dominant emission sources for ozone and SOA formation potential.

关键词： Volatile organic compounds （VOCs）OzoneSecondary organic aerosol （SOA）Formation potentialcontrol strategy

来源：评论

学校读者我要写书评

暂无评论

Population ageing and deaths attributable to ambient PM_2·5 pollution: a global analysis of economic cost

引用

The Lancet Planetary Health 2021年第6期5卷 e356-e367页

作者： Yin, Hao Brauer, Michael Zhang, Junfeng Cai, Wenjia Navrud, Ståle Burnett, Richard Howard, Courtney Deng, Zhu Kammen, Daniel M Schellnhuber, Hans Joachim Chen, Kai Kan, Haidong Chen, Zhan-Ming Chen, Bin Zhang, Ning Mi, Zhifu Coffman, D'Maris Cohen, Aaron J Guan, Dabo Zhang, Qiang Gong, Peng Liu, Zhu Ministry of Education Key Laboratory for Earth System modeling Department of Earth System Science Tsinghua University Beijing China School of Population and Public Health The University of British Columbia Vancouver BC Canada Energy and Resources Group University of California Berkeley CA United States Goldman School of Public Policy University of California Berkeley CA United States Renewable and Appropriate Energy Laboratory University of California Berkeley CA United States Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Nicholas School of the Environment and Duke Global Health Institute Duke University Durham NC United States Duke Kunshan University Kunshan Jiangsu China School of Economics and Business Norwegian University of Life Sciences Ås Norway Population Studies Division Health Canada Ottawa ON Canada Cumming School of Medicine University of Calgary Calgary AB Canada Planetary Health Dahdaleh Institute for Global Health Research York University Toronto ON Canada Potsdam Institute for Climate Impact Research Potsdam Germany Department of Environmental Health Sciences Yale School of Public Health New Haven CT United States School of Public Health Fudan University Shanghai China Department of Energy Economics School of Economics Renmin University of China Beijing China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing China Institute of Blue and Green Development Shandong University Weihai China The Bartlett School of Sustainable Construction University College London London United Kingdom Health Effects Institute Boston MA United States

Background: The health impacts of ambient air pollution impose large costs on society. Although all people are exposed to air pollution, the older population (ie, those aged ≥60 years) tends to be disproportionally affected. As a result, there is growing concern about the health impacts of air pollution as many countries undergo rapid population ageing. We investigated the spatial and temporal variation in the economic cost of deaths attributable to ambient air pollution and its interaction with population ageing from 2000 to 2016 at global and regional levels. Methods: In this global analysis, we developed an age-adjusted measure of the value of a statistical life-year (VSLY) to estimate the economic cost of deaths attributable to ambient PM_2·5 pollution using Global Burden of Diseases, Injuries, and Risk Factors Study 2017 data and country-level socioeconomic information. First, we estimated the global age-specific and cause-specific mortality and years of life lost (YLLs) attributable to PM_2·5 pollution using the global exposure mortality model and global estimates of exposure at 0·1° × 0·1° (about 11 km × 11 km at the equator) resolution. Second, for each year between 2000 and 2016, we translated the YLLs within each age group into a health-related cost using a country-specific, age-adjusted measure of VSLY. Third, we decomposed the major driving factors that contributed to the temporal change in health costs related to PM_2·5. Finally, we did a sensitivity test to analyse the variability of the estimated health costs to four alternative valuation measures. We identified the uncertainty intervals (UIs) from 1000 draws of the parameters and concentration–response functions by age, cause, country, and year. All economic values are reported in 2011 purchasing power parity-adjusted US dollars. All simulations were done with R, version 3.6.0. Findings: Globally, in 2016, PM_2·5 was estimated to have caused 8·42 million (95% U

关键词：

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：