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Decision Support System for Adaptive Restoration Control of Transmission System

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 870-885页

作者： Ze Li Yusheng Xue haohao wang Lili Hao School of Electrical Engineering Southeast UniversityNanjingChina State Grid Electric Power Research Institute(NARI Group Corporation) NanjingChina State Grid Electric Power Research Institute(NARI Group Corporation) NanjingChinaand they are also with State Key Laboratory of Smart Grid Protection and Operation ControlNanjingChina School of Electrical Engineering and Control Science Nanjing Tech UniversityNanjingChina

The power system restoration control has a higher uncertainty level than the preventive control of cascading failures. In order to ensure the feasibility of the decision support system of restoration control, a decision support framework for adaptive restoration control of transmission system is proposed, which can support the coordinated restoration of multiple partitions, coordinated restoration of units and loads, and coordination of multi-partition decision-making process and actual restoration process. The proposed framework is divided into two layers, global coordination layer and partition optimization layer. The upper layer partitions the transmission system according to the power outage scenario, constantly and dynamically adjusts the partitions during the restoration process, and optimizes the time-space decision-making of inter-partition connectivity. For each partition, the lower layer pre-selects restoration targets according to the estimated restoration income, optimizes the corresponding restoration paths, and evaluates the restoration plans according to the expected net income per unit of power consumption. During the restoration process, if the restoration operation such as energizing the outage branch fails, the current restoration plan will be adaptively switched to the sub-optimal one or re-optimized if necessary. The framework includes two operation modes, i.e., the on-line operation mode and training simulation mode, and provides an information interaction interface for collaborative restoration with related distribution systems. The effectiveness and adaptability of the proposed framework is demonstrated by simulations using the modified IEEE 118-bus system.

关键词： Transmission system restoration two-layer decision support framework restoration risk and income restoration uncertainty sand table deduction

Comparison of tailpipe carbonyls and volatile organic compounds emissions from in-use gasoline/CNG bi-fuel vehicles

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Journal of Environmental Sciences 2024年第1期135卷 619-629页

作者： Jiachen Li Yunshan Ge Xin wang Mengzhu Zhang haohao wang School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China

Ground-level ozone contamination has been globally an urban air quality issue,particularly for China,which has recently made significant progress in purifying its *** exhaust emissions from motor vehicles,predominantly carbonyls and volatile organic compounds(VOCs),are among the leading contributors to ozone *** this chassislevel study,the unregulated emissions from five China-5 certified gasoline/CNG bi-fuel taxis,along with their ozone forming potential(OFP),were *** is found that carbonyls and VOCs were mainly emitted during the starting phase no matter the engine was cold or *** to gasoline,CNG fueling reduced VOCs emissions on a large scale,especially in the starting phase,but had elevated *** a fleet average,CNG fueling derived 15%and 46%less OFP than gasoline in cold-and hot-start tests,*** contributed to over 90%of the total OFP of the *** terms of alleviating ground-level ozone contamination,CNG is a feasible alternative to gasoline on light-duty vehicles.

关键词： CNG Gasoline Carbonyls VOCs OFP

Decision Support System for Adaptive Restoration Control of Distribution System

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1256-1273页

作者： Lili Hao Yusheng Xue Ze Li haohao wang Qun Xu School of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China State Grid Electric Power Research Institute(NARI Group Corporation) NanjingChina State Key Laboratory of Smart Grid Protection and Operation Control NanjingChina State Grid Qingdao Power Supply Company QingdaoChina

Aiming at the high-dimensional uncertainties of restoration process, an optimization model for distribution system restoration control is proposed considering expected restoration benefits, expected restoration costs, and security risks of the overall restoration scheme. In the proposed model, the effect of security control on restoration process is actively analyzed considering the security control costs of preventive, emergency, and correction controls. A two-layer decision support framework for distribution system restoration decision support system(DRDSS) is also designed. The upper layer of the proposed framework generates the pre-adjustment schemes of operation mode for energized power grid by load transfer and selects the optimal pre-adjustment scheme and the corresponding partitioning scheme based on the partition adjustment results of each pre-adjustment scheme. In addition, it optimizes the spatial-temporal decision-making of the inter-partition connectivity. For each partition, the lower layer of the proposed framework pre-selects the units and loads to be restored according to the pre-evaluated restoration income, generates the table of alternative restoration scheme for coping with uncertain events through simulation and deduction, and evaluates the risk and benefit of each *** the uncertain events in the actual restoration process, the current restoration scheme can be adaptively switched to a sub-optimal scheme or re-optimized if necessary. Meanwhile, the proposed framework provides an information interaction interface for collaborative restoration with the related transmission system. A 123-node test system is built to evaluate the effectiveness and adaptability of the proposed model and framework.

关键词： Distribution system restoration pre-adjustment of operation mode load transfer dynamic partitioning risk and benefit security control

Influence of leading edge with real manufacturing error on aerodynamic performance of high subsonic compressor cascades

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Chinese Journal of Aeronautics 2021年第6期34卷 220-232页

作者： Chi MA Limin GAO haohao wang Ruiyu LI Baohai WU School of Power and Energy Northwestern Polytechnical UniversityXi’an 710129China The National Key Laboratory of Aerodynamic Design and Research Xi'an 710129China Key Laboratory of Contemporary Design and Integrated Manufacturing Technology of Ministry of Education Northwestern Polytechnical UniversityXi'an 710072China

To investigate the influence of real leading-edge manufacturing error on aerodynamic performance of high subsonic compressor blades,a family of leading-edge manufacturing error data were obtained from measured compressor *** the limited samples,the leadingedge angle and leading-edge radius distribution forms were evaluated by Shapiro-Wilk test and quantile–quantile *** statistical characteristics provided can be introduced to later related *** parameterization design method B-spline and Bezier are adopted to create geometry models with manufacturing error based on leading-edge angle and leading-edge *** influence of real manufacturing error is quantified and analyzed by self-developed non-intrusive polynomial chaos and Sobol’*** mechanism of leading-edge manufacturing error on aerodynamic performance is *** results show that the total pressure loss coefficient is sensitive to the leading-edge manufacturing error compared with the static pressure ratio,especially at high ***,manufacturing error of the leading edge will influence the local flow acceleration and subsequently cause fluctuation of the downstream *** aerodynamic performance is sensitive to the manufacturing error of leading-edge radius at the design and negative incidences,while it is sensitive to the manufacturing error of leading-edge angle under the operation conditions with high incidences.

关键词： Aerodynamic performance Compressor cascade Limited measurement data Manufacturing error Uncertainty analysis

Scheduling optimization for upstream dataflows in edge computing

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Digital Communications and Networks 2023年第6期9卷 1448-1457页

作者： haohao wang Mengmeng Sun Lianming Zhang Pingping Dong Yehua Wei Jing Mei College of Information Science and Engineering Hunan Normal UniversityChangsha410081China Hunan Provincial Key Laboratory of Intelligent Computing and Language Information Processing Hunan Normal UniversityChangsha410081China Hunan Xiangjiang Artificial Intelligence Academy Hunan Normal UniversityChangsha410081China

Edge computing can alleviate the problem of insufficient computational resources for the user equipment,improve the network processing environment,and promote the user *** computing is well known as a prospective method for the development of the Internet of Things(IoT).However,with the development of smart terminals,much more time is required for scheduling the terminal high-intensity upstream dataflow in the edge server than for scheduling that in the downstream *** this paper,we study the scheduling strategy for upstream dataflows in edge computing networks and introduce a three-tier edge computing network *** propose a Time-Slicing Self-Adaptive Scheduling(TSAS)algorithm based on the hierarchical queue,which can reduce the queuing delay of the dataflow,improve the timeliness of dataflow processing and achieve an efficient and reasonable performance of dataflow *** experimental results show that the TSAS algorithm can reduce latency,minimize energy consumption,and increase system throughput.

关键词： Edge computing Time-slicing Dataflow scheduling Dynamic analysis

Scenario-based Unit Commitment Optimization for Power System with Large-scale Wind Power Participating in Primary Frequency Regulation

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1259-1267页

作者： Lili Hao Jing Ji Dongliang Xie haohao wang Wei Li Philip Asaah the School of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China State Grid Electric Power Research Institute Nanjing 211106China

Continuous increase of wind power penetration brings high randomness to power system,and also leads to serious shortage of primary frequency regulation(PFR)reserve for power system whose reserve capacity is typically provided by conventional *** large-scale wind power participating in PFR,this paper proposes a unit commitment optimization model with respect to coordination of steady state and transient *** addition to traditional operation costs,losses of wind farm de-loaded operation,environmental benefits and transient frequency safety costs in high-risk stochastic scenarios are also considered in the ***,the model makes full use of interruptible loads on demand side as one of the PFR reserve sources.A selection method for high-risk scenarios is also proposed to improve the calculation ***,this paper proposes an inner-outer iterative optimization method for the model *** method is validated by the New England 10-machine system,and the results show that the optimization model can guarantee both the safety of transient frequency and the economy of system operation.

关键词： Unit commitment optimization primary frequency regulation(PFR) wind power transient frequency safety high-risk stochastic scenario inner-outer iterative optimization

Intelligent H_(2)S release coating for regulating vascular remodeling

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Bioactive Materials 2021年第4期6卷 1040-1050页

作者： Bingyang Lu Xiao Han Ansha Zhao Dan Luo Manfred FMaitz haohao wang Ping Yang Nan Huang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu610031China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu610031China Leibniz-Institute of Polymer Research Dresden Max Bergmann Center of Biomaterials DresdenHohe Strasse 601069DresdenGermany

Coronary atherosclerotic lesions exhibit a low-pH chronic inflammatory *** to insufficient drug release control,drug-eluting stent intervention can lead to delayed endothelialization,advanced thrombosis,and unprecise *** this study,hyaluronic acid and chitosan were used to prepare pH-responsive self-assembling *** hydrogen sulfide(H2S)releasing aspirin derivative ACS14 was used as drug in the *** film regulates the release of the drug adjusted to the microenvironment of the lesion,and the drug balances the vascular function by releasing the regulating gas H2S,which comparably to NO promotes the self-healing capacity of blood *** releasing profiles of the films at different pH,and other biological effects on blood vessels were evaluated through blood compatibility,cellular,and implantation *** novel method of self-assembled films which H2S in an amount,which is adjusted to the condition of the lesion provides a new concept for the treatment of cardiovascular diseases.

关键词： pH responsive Layer-by-layer self-assembly film H_(2)S Coronary atherosclerosis

Advanced smart biomaterials and constructs for hard tissue engineering and regeneration

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Bone Research 2018年第4期6卷 316-330页

作者： Ke Zhang Suping wang Chenchen Zhou Lei Cheng Xianling Gao Xianju Xie Jirun Sun haohao wang Michael D.Weir Mark A.Reynolds Ning Zhang Yuxing Bai Hockin H.K.Xu Department of Orthodontics School of Stomatology Capital Medical University Department of Advanced Oral Sciences and Therapeutics University of Maryland Dental School State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology Sichuan University Department of Operative Dentistry and Endodontics Guanghua School of Stomatology Sun Yat-sen University Guangdong Provincial Key Laboratory of Stomatology Volpe Research Center American Dental Association Foundation National Institute of Standards and Technology Center for Stem Cell Biology & Regenerative Medicine University of Maryland School of Medicine Marlene and Stewart Greenebaum Cancer Center University of Maryland School of Medicine

Hard tissue repair and regeneration cost hundreds of billions of dollars annually worldwide, and the need has substantially increased as the population has aged. Hard tissues include bone and tooth structures that contain calcium phosphate *** biomaterial-based tissue engineering and regenerative medicine methods have the exciting potential to meet this urgent need. Smart biomaterials and constructs refer to biomaterials and constructs that possess instructive/inductive or triggering/stimulating effects on cells and tissues by engineering the material’s responsiveness to internal or external stimuli or have intelligently tailored properties and functions that can promote tissue repair and regeneration. The smart material-based approaches include smart scaffolds and stem cell constructs for bone tissue engineering; smart drug delivery systems to enhance bone regeneration; smart dental resins that respond to pH to protect tooth structures; smart pH-sensitive dental materials to selectively inhibit acid-producing bacteria; smart polymers to modulate biofilm species away from a pathogenic composition and shift towards a healthy composition; and smart materials to suppress biofilms and avoid drug resistance. These smart biomaterials can not only deliver and guide stem cells to improve tissue regeneration and deliver drugs and bioactive agents with spatially and temporarily controlled releases but can also modulate/suppress biofilms and combat infections in wound sites. The new generation of smart biomaterials provides exciting potential and is a promising opportunity to substantially enhance hard tissue engineering and regenerative medicine efficacy.

关键词： regeneration engineering minerals

Regulating f orbital of Tb electronic reservoir to activate stepwise and dual-directional sulfur conversion reaction

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InfoMat 2023年第1期5卷 125-138页

作者： Shuang Yu Shuo Yang Dong Cai Huagui Nie Xuemei Zhou Tingting Li Ce Liang haohao wang Yangyang Dong Rui Xu Guoyong Fang Jinjie Qian Yongjie Ge Yue Hu Zhi Yang Key Laboratory of Carbon Materials of Zhejiang Province Wenzhou UniversityWenzhouPeople's Republic of China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhouPeople's Republic of China

The sluggish kinetics in multistep sulfur redox reaction with different energy requirements for each step,is considered as the crucial handicap of lithium–sulfur(Li–S)*** an electron reservoir,which can dynamically release electron to/accept electron from sulfur species during dis-charge/charge,is the ideal strategy for realizing stepwise and dual-directional polysulfide ***,a single Tb^(3+/4+)oxide with moderate unfilled f orbital is synthetized as an electron reservoir to optimize polysulfide adsorption via Tb–S and N…Li bonds,reduce activation energy barrier,expe-dite electron/Li+transport,and selectively catalyze both long-chain and short-chain polysulfide conversions during charge and *** a result,Tb electron reservoir enables stable operation of low-capacity decay(0.087%over 500 cycles at 1 C),high sulfur loading(5.2 mg cm^(2))and electrolyte-starved(7.5μL mg^(-1))Li–S *** work could unlock the potential of f orbital engineering for high-energy battery systems.

关键词： electronic reservoir lithium-sulfur battery sulfur redox reaction kinetics unfilled f orbital