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Proceedings of 2022 7th International Conference on Environmental Engineering and Sustainable Development (CEESD 2022)

作者： Li, Y.F. Li, Y.P. Huang, G.H. State Key Joint Laboratory of Environmental Simulation and Pollution Control China-Canada Center for Energy Environment and Ecology Research UR-BNU School of Environment Beijing Normal University Beijing100875 China Faculty of Engineering and Applied Science University of Regina ReginaSKS4S 0A2 Canada

ISBN: (纸本)9783031281921

Climate change and uncertainty have significant impacts on the multi-regional energy system in terms of both supply and demand. In this study, a multi-regional energy model is developed based on the interval linear programming method. The model could not only describe the complex relationship between inter-regional interaction and energy transmission in detail, but also provide optimal schemes for regulating electricity generation mix, mitigating carbon emissions, and minimizing system cost. The results show that: (i) from 2021 to 2050, the proportion of fossil fuels in energy and electricity supply will show a decreasing trend, and the regional energy and electricity structure will be optimized;(ii) under the RCP4.5 scenarios, regional carbon emissions will peak around 2040 and show a decreasing trend after the peak, with a reduction of about 1.45%;(iii) the BTH region should bear additional costs of carbon emission reduction under the RCP4.5 scenarios, the total system cost is about 1.2 times of that under the RCP8.5 scenarios. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Climate change

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Biodegradation of Tetracycline by Enriched Bacterial Consortia: Microbial Community Succession and Degradation Characteristics and Mechanism

SSRN

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SSRN 2022年

作者： Chen, Xiuli Ke, Yanchu Zhu, Ying Xu, Mingbang Chen, Chao Xie, Shuguang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing100871 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Tetracycline (TC) is an emerging pollutant with poor biodegradability and persistent existence. Biodegradation has a tremendous potential for the clean-up of TC residues. In this study, two microbial consortia (named SL and SI) were respectively enriched from activated sludge and soil after more than three months of acclimation. Diversity dramatically decreased in these finally enriched consortia compared with the original microbiotas. Microbial compositions of the two consortia as revealed by 16S rRNA sequencing were similar to some extent, and the dominant genera Pseudomonas, Sphingobacterium, and Achromobacter were identified as the potential TC degraders. In addition, most ARGs quantified during the acclimation process became lower in the finally enriched microbial consortia. Consortia SL and SI were capable of efficiently biodegrading TC by 82.92% and 86.83% within 7 days, respectively. They could retain high degradation capabilities under a wide range of pH (4-10) and moderate/high temperatures (25–40 °C). Peptone with concentrations of 4-10 g/L could serve as a desirable primary growth substrate for consortia to remove TC through co-metabolism. A total of 16 possible intermediates including a novel biodegradation product TP245 were detected during TC degradation. Peroxidases and tetX-like genes as revealed by metagenomic sequencing were likely responsible for TC biodegradation. © 2022, The Authors. All rights reserved.

关键词： Biodegradation

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Two-level VSC real-time simulation modeling method based on controlled source compensation 2

Two-level VSC real-time simulation modeling method based on ...

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2nd International Conference on Energy, Power, and Electrical Technology, ICEPET 2023

作者： Hu, Binjiang Xi, Xinze Zhu, Yihua Xing, Chao Li, Shuyong Ma, Zun Huang, Libin State Key Laboratory of HVDC Electric Power Research Institute CSG 11 of Kexiang Road Huangpu District Guangzhou510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System 11 of Kexiang Road Huangpu District Guangzhou510663 China CSG Key Laboratory of Power System Simulation 11 of Kexiang Road Huangpu District Guangzhou510663 China Electric Power Research Institute of Yunnan Power Grid Co. Ltd. Kunming650217 China

ISBN: (纸本)9781510668270

The accurate modeling of two-level VSC is of great significance for the real-time simulation of new power systems, and the modeling of its core component switch group has attracted more and more attention. Since traditional binary resistance models require time to "backtrack" to accurately locate the switching moment, interpolation is difficult to use for real-time simulation. In this paper, a two-level VSC real-time simulation modeling method based on controlled source compensation is proposed. This method combines the controlled source model with the binary resistance model, uses the binary resistance model to ensure the simulation accuracy when the switching state is constant, and introduces the controlled source model to compensate for the error caused by the delay of the trigger signal when the switching state is switched. According to the two-level VSC real-time simulation model realized by this method, while reducing the non-characteristic subharmonics, the admittance matrix can be pre-stored, which effectively reduces the model computing resource occupation, and is suitable for a variety of complex power electronic system modeling methods. © 2023 SPIE.

关键词： Electric switches

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Nano-sized Ag rather than single-atom Ag determines CO oxidation activity and stability

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Nano Research 2022年第1期15卷 452-456页

作者： Fei Wang Zhao Li Honghong Wang Min Chen Changbin Zhang Ping Ning Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China

Single-atom catalysis recently attracts great attentions,however,whether single atom or their nanoparticle(NP)has the advantage in its intrinsic activity remains under heated ***/Al_(2)O_(3) is a widely used catalyst for many catalytic reactions,while the effect of Ag particle size on the actity is seldom investigated due to the great difficulty in synthesizing single atom Ag and Ag clusters/particles with different ***,we firstly prepared an atomically dispersed Ag/Al_(2)O_(3) catalyst using a nano-sized y-Al_(2)O_(3) as the support,subsequently obtained a series of Ag/Al_(2)O_(3) catalysts with different Ag particle sizes by H_(2) reducing single-atom Ag/Al_(2)O_(3) catalyst at various *** Ag/Al_(2)O_(3) treated at 600℃demonstrated superior CO oxidation performance over single-atom Ag/Al_(2)O_(3) and the Ag/Al_(2)O_(3) treated at 400 and 800℃.Based on experimental data and dpnsity functional theory(DFT)calculation results,we reveal that the larger Ag°particle is beneficial to oxygen activation and improves the valence stability during oxidation reaction,while the aggregation of Ag°particle also accordingly decreases the concentration of surface active sites,hence,there is an optimum Ag0 particle *** findings clearly confirm that Ag0nanoparticle has the advantage over single-atom Ag species in its intrinsic activity for CO oxidation.

关键词： Reduction after anchoring Ag clusters single atom catalyst CO oxidation

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A Review of Coupling and Interaction Studies of Grid-Forming Converters Based on Transient Stability

A Review of Coupling and Interaction Studies of Grid-Forming...

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Energy, Electrical and Power Engineering (CEEPE), International Conference on

作者： Zhen Tang Shuo Wang Yang Cui Xueting Cheng Yuting Zhao State Grid Shanxi Electric Power Research Institute Taiyuan China Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Northeast Electric Power University Jilin China

ISBN: (数字)9798350375794

ISBN: (纸本)9798350375800

Grid-forming (GFM) inverters, with their synchronous voltage source characteristics, have attracted widespread attention in recent years due to their ability to effectively enhance the stability of power-electronic-based new power systems. The document starts by examining the mechanism of system stability established by GFM and analyzes the issues that need to be addressed urgently after GFM is integrated into the system. Grid-forming control establishes multiple coupling channels with the grid connection point to provide voltage and frequency support. However, the frequency coupling also brings about many interaction issues. The document divides the coupling interaction issues into "internal coupling" and "external interaction" issues based on whether the control structure modification is considered, and evaluates the research path for them.

关键词： Couplings Reviews Resonant frequency Power system stability Stability analysis Resonance Transient analysis

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Optimization Study on the control Strategy of DC Line Fault Recovery for Yongren-Funing HVDC 6

Optimization Study on the Control Strategy of DC Line Fault ...

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6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Zhu, Yukun Huang, Libin Li, Shuyong Zhu, Yihua Song, Yantao Liu, Ren State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Electric Power Research Institute China Southern Power Grid CSG Key Laboratory for Power System Simulation Guangzhou China XJ Electric Co Ltd Xuchang China

ISBN: (纸本)9798350347159

The ±500kV Yongren-Funing HVDC transmission project is the first HVDC project whose sending and receiving ends are both located in the same province. When DC line fault happened under the condition of inter-communication fault between the pole control systems of the rectifier and inverter stations, the HVDC system cannot be blocked because of the frequent repeating actions of the DC line fault recovery in the inverter station. In order to solve the problem, an optimal control strategy of direct blocking HVDC system was proposed to solve the above issue. The optimization control strategy was verified by RTDS simulation. The simulation results showed that the proposed optimization control strategy of the DC line fault recovery could solve the above problems effectively. The proposed strategy has already been implemented on site permanently, which has great significance for the HVDC/UHVDC transmission projects in operation currently. © 2022 IEEE.

关键词： HVDC power transmission

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Hydroxyl,hydroperoxyl free radicals determination methods in atmosphere and troposphere

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Journal of Environmental Sciences 2021年第1期33卷 324-335页

作者： Guoying Wang Yves Iradukunda Gaofeng Shi Pascaline Sanga Xiuli Niu Zhijun Wu School of Petrochemical Engineering Lanzhou University of TechnologyLanzhou 730050China Gansu Food Inspection and Research Institute Lanzhou 730050China State Key Joint Laboratory of Environment Simulation and Pollution Control(Peking University) College of Enuironmental Sciences and EngineeringPeking UniversityBeijing 100871China

The hydroxyl radical(·OH)has a crucial function in the oxidation and removal of many atmospheric compounds that are harmful to ***,high reactivity,low atmospheric abundance,determination of hydroxyl,and hydroperoxyl radical’s quantity is very *** the atmosphere and troposphere,hydroperoxyl radicals(HO_(2))are closely demanded in the chemical oxidation of the *** advances in technology have allowed researchers to improve the determination methods on the research of free radicals through some spectroscopic *** far,several methods such as laser-induced fluorescence(LIF),high-performance liquid chromatography(HPLC),and chemical ionization mass spectroscopy have been identified and mostly used in determining the quantity of hydroxyl and hydroperoxyl *** this systematic review,we have advised the use of scavenger as an advance for further researchers to circumvent some of these problems caused by free *** primary goal of this review is to deepen our understanding of the functions of the most critical free radical(·OH,HO_(2))and also understand the currently used methods to quantify them in the atmosphere and troposphere.

关键词： Atmosphere Determination method Hydroxyl radical Hydroperoxyl radical Troposphere

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Research on Cooling Characteristics of Power Battery Fast-charging of Refrigerant-based Direct Cooling System

Research on Cooling Characteristics of Power Battery Fast-ch...

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2020 International Conference on New Energy, Power and Environmental Engineering, NEPEE 2020

作者： Wang, Jialiang Zhang, Yimin State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130022 China College of Automotive Engineering Jilin University Changchun130022 China

In this paper, the temperature variation characteristics and control methods of power battery during rapid charging are studied. For the problem of large heat production in power battery fast-charging process, a refrigerant-based direct cooling battery thermal management system were built based on the AMEsim one-dimensional simulation platform. The change law of the battery temperature and the influence of different types of control thresholds on the cooling effect and the thermal management boundary of the cooling process in the constant current charging method of were studied. The results show that in the cooling process with the temperature as the threshold value, the cooling response is good under the condition of lower C-rate. With the increase of the C-rate, the temperature threshold cooling can not meet the cooling response requirements. Based on the consequence, the battery's SOC(state of charge) was proposed as the control threshold signal for the advance cooling. The simulation results show that the SOC threshold cooling can control the highest temperature of the battery below 40 C, meeting the requirements of battery operation request. Through the full cooling of the maximum power, it is obtained that the thermal management boundary C-rate decreases linearly with the initial temperature change, and the final temperature in different initial temperatures increases linearly with the increase of the C-rate. © Published under licence by IOP Publishing Ltd.

关键词： Cooling

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Kinetic Modeling of Secondary Organic Aerosol in a Weather-Chemistry Model: Parameterizations, Processes, and Predictions for GOAmazon

ACS ES&T Air

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ACS ES&T Air 2025年第2期2卷 249-263页

作者： Yicong He Kelsey R. Bilsback Manish Shrivastava Rahul A. Zaveri John E. Shilling John H. Seinfeld Bin Zhao Shuxiao Wang Christopher D. Cappa Jeffrey R. Pierce Shantanu H. Jathar Department of Mechanical Engineering Colorado State University Fort Collins Colorado 80523 United States；State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China；State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China Department of Mechanical Engineering Colorado State University Fort Collins Colorado 80523 United States；PSE Healthy Energy Oakland California 94612 United States Pacific Northwest National Laboratory Richland Washington 99354 United States Divison of Chemistry and Chemical Engineering California Institute of Technology Pasadena California 91125 United States State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China；State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China Department of Atmospheric Science Colorado State University Fort Collins Colorado 80521 United States Department of Civil and Environmental Engineering University of California Davis Davis California 95616 United States Department of Mechanical Engineering Colorado State University Fort Collins Colorado 80523 United States

Secondary organic aerosol (SOA) forms and evolves in the atmosphere through many pathways and processes, over diverse spatial and time scales. Hence, there is a need to represent these widely varying kinetic processes in large-scale atmospheric models to allow for accurate predictions of the abundance, properties, and impacts of SOA. In this work, we integrated a kinetic, process-level model (simpleSOM-MOSAIC) into a weather-chemistry model (WRF-Chem) to simulate the oxidation chemistry and microphysics of atmospheric SOA. simpleSOM-MOSAIC simulates multigenerational gas-phase chemistry, autoxidation reactions, aqueous chemistry, heterogeneous oxidation, oligomerization, and phase-state-influenced gas/particle partitioning of SOA. As a case study, the integrated WRF-Chem-simpleSOM-MOSAIC (WC-SSM) model was used to simulate the photochemical evolution downwind of a large city (Manaus, Brazil) in the Amazon and, in turn, study the anthropogenic and biogenic interactions in an otherwise pristine environment. Consistent with previous work, we found that OA was enhanced by up to a factor of 4 in the urban plume due to elevated hydroxyl radical (OH) concentrations, relative to the background, and that this OA was dominated by SOA from biogenic precursors (80%). In addition to accurately simulating the OA enhancement in the urban plume, the model reproduced the magnitude of the OA oxygen-to-carbon (O:C) ratio and broadly tracked the evolution of the aerosol number size distribution. Our work highlights the importance of including an integrated, kinetic representation of SOA processes in an atmospheric model.

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An Equivalent Modeling Method for Integrated Hydro-Photovoltaic-Wind Systems Based on Particle Swarm Optimization and Neural Networks 4

An Equivalent Modeling Method for Integrated Hydro-Photovolt...

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4th International Conference on Intelligent Power and Systems, ICIPS 2024

作者： Huang, Ying Lu, Yuanhong Zhao, Yanjun Hu, Yufeng Zhang, Jie Guo, Haiping China Southern Power Grid State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou Guangzhou510663 China China Southern Power Grid National Energy Power Grid Technology R & D Centre Guangzhou Guangzhou510663 China China Southern Power Grid Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou Guangzhou510663 China China Southern Power Grid CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou Guangzhou510663 China

ISBN: (纸本)9798331532765

The fault transient characteristics of power grids have undergone a fundamental transformation as a consequence of the advent of hybrid scale access to power grids by new energy sources. Nevertheless, the existing stand-alone equivalent model is unable to accurately characterise the fault transient characteristics of the hybrid light-water-wind electric field/cluster. Furthermore, the simulation computation of the stand-alone equivalent model is considerable in scale and the simulation efficiency is low. This paper proposes a particle swarm neural network-based clustered equivalent modelling method for a light-water-wind hybrid electric field. Firstly, a transient model of the light-water-wind hybrid electric field is established, and the characteristic influence factors of faults are constructed through theoretical analysis. These include the distance between the light-water-wind hybrid electric field and the point of common coupling (PCC), the input of current limiting measures on the DC side, the light, the water speed, the wind speed, and the reactive power at the outlet. Subsequently, the Euclidean distance is calculated for the set of characteristic influencing factors, and the initial centre of clustering of wind turbines is extracted based on the improved maximum-minimum distance method. Ultimately, the clustering equivalent modelling is accomplished through the utilisation of the aforementioned feature influencing factors and the classification initial centre as the training set. The simulation results show that compared with the single-machine equivalent model, The simulation error has been reduced from the order of magnitude of 10-2 p.u. to the order of magnitude of 10-4 p.u., while the simulation efficiency of this method is has been reduced from the order of magnitude of 10-2 s to the order of magnitude of 10-4 s. © 2024 IEEE.

关键词： Particle swarm optimization (PSO)

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