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FLECH:A Danish market solution for DSO congestion management through DER flexibility services

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Journal of Modern Power Systems and Clean Energy 2014年第2期2卷 126-133页

作者： Chunyu ZHANG Yi DING Niels Christian NORDENTOFT Pierre PINSON jacobøstergaard Center for Electric Power and Energy Technical University of Denmark2800 Kgs.LyngbyDenmark Danish Energy Association 1970 FrederiksbergDenmark

Future electric power systems will face new operational challenges due to the high penetration of distributed energy resources(DERs).In Denmark,distribution system operator(DSO)expects a significant congestion increased in distribution *** order to manage these congestions and mobilize the DERs as economically efficient as possible in the future distribution grid,the brand new notion of flexibility clearing house(FLECH)is proposed in this *** the aggregator-based offers,the proposed FLECH market has the ability to promote small scale DERs(upto 5 MW)for actively participating in trading flexibility services,which are stipulated accommodating the various requirements of ***,the trading setups and processes of the FLECH market are also illustrated in detail.A quantitative example is utilized to illustrate the formulation and classification of flexibility services provided by the DERs in the proposed FLECH market.

关键词： Electricity market Distributed energy resources(DERs) Aggregator Flexibility clearing house(FLECH) Flexibility services

Towards Fully Renewable Energy Systems:Experience and Trends in Denmark

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CSEE Journal of Power and Energy Systems 2017年第1期3卷 26-35页

作者： Pierre Pinson Lesia Mitridati Christos Ordoudis jacobøstergaard Technical University of Denmark Department of Electrical EngineeringCentre for Electric Power and EnergyKgs.LyngbyDenmark

Deployment of renewable energy generation capacities and integration of their power production into existing power systems has become a global trend,with a common set of operational challenges stemming from variability and limited predictability of power generation from,e.g.,wind and *** is a country that invested early in wind energy,rapidly proposing very ambitious goals for the future of its energy system and global energy *** the case of Denmark is specific due to its limited size and good interconnections,there may still be a lot to learn from the way operational practice has evolved,also from shifting towards a liberalized electricity market environment,and more generally from going along with other technological and societal *** aim of this paper is to give an overview of recent and current initiatives in Denmark that contributes towards a goal of reaching a fully renewable energy system.

关键词： Coordination energy markets flexibility integrated energy systems renewable energy integration

Voltage rise mitigation for solar PV integration at LV grids Studies from ***

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Journal of Modern Power Systems and Clean Energy 2015年第3期3卷 411-421页

作者： Guangya YANG Francesco MARRA Miguel JUAMPEREZ Søren Bækhøj KJÆR Seyedmostafa HASHEMI jacobøstergaard Hans Henrik IPSEN Kenn H.B.FREDERIKSEN Centre for Electric Power and Energy Department of Electrical EngineeringTechnical University of Denmark2800 Kgs.LyngbyDenmark Danfoss Solar Inverter A/S 6430 NordborgDenmark Østkraft 3700 RønneDenmark FREDERIKSEN Energimidt8600 SilkeborgDenmark

Solar energy from photovoltaic(PV)is among the fastest developing renewable energy systems *** by governmental subsidies and technological development,Europe has seen a fast expansion of solar PV in the last few *** the installed PV plants,most of them are situated at the distribution systems and bring various operational challenges such as power quality and power flow *** paper discusses the modelling requirements for PV system integration studies,as well as the possible techniques for voltage rise mitigation at low voltage(LV)grids for increasing PV *** solutions are listed and preliminary results are presented.

关键词： Solar photovoltaic(PV) Voltage rise Virtual power plants Ancillary services

柔性直流输电并网风电厂的低电压穿越能力改进(英文)

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电力系统自动化 2015年第3期39卷 14-22页

作者： Ranjan SHARMA Qiuwei WU Seung Tae CHA Kim Hφj JENSEN Tony Wederberg RASMUSSEN jacob Φstergaard Siemens Wind Power A/S Center for Electric Power and Energy Department of Electrical EngineeringTechnical University

To achieve active control of the AC voltage magnitude of wind power plant(WPP)collector network and improve the fault ride-through(FRT)capability,an FRT scheme based on feed forward DC voltage control is presented for voltage source converter-high voltage direct current(VSC-HVDC)connected offshore *** steady state operation,an open loop AC voltage control is implemented at the WPP-side VSC of the HVDC system so that any possible control interactions between WPP-side VSC and VSC of wind turbine are *** during any grid fault,a dynamic AC voltage reference is made according to both the DC voltage error and AC active current from the WPP collector system,thus ensuring fast and robust FRT of the VSC-HVDC-connected offshore *** the unbalanced fault condition in the host power system,the resulting oscillatory DC voltage is directly used in the VSC AC voltage controller at the WPP side so that the WPP collector system voltage also reflects the unbalance in the main *** domain simulations are performed to verify the efficacy of the FRT scheme based on the proposed feed forward DC voltage *** results show satisfactory FRT responses of the VSC-HVDC-connected offshore WPP under balanced and unbalanced faults in the host power system,as is shown under a serious fault in the WPP collector network.

关键词：电网故障连接海上能力直流输电系统电压控制器不平衡故障电厂

Distribution Network Expansion Planning Based on Multi-objective PSO Algorithm

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Energy and Power Engineering 2013年第4期5卷 975-979页

作者： Chunyu Zhang Yi Ding Qiuwei Wu Qi Wang jacob Φstergaard Center for Electric Power and Energy Technical University of DenmarkCopenhagenDenmark

This paper presents a novel approach for electrical distribution network expansion planning using multi-objective particle swarm optimization (PSO). The optimization objectives are: investment and operation cost, energy losses cost, and power congestion cost. A two-phase multi-objective PSO algorithm is employed to solve this optimization problem, which can accelerate the convergence and guarantee the diversity of Pareto-optimal front set as well. The feasibility and effectiveness of both the proposed multi-objective planning approach and the improved multi-objective PSO have been verified by the 18-node typical system.

关键词： Distribution Network Expansion Planning Two-phase Multi-objective PSO

Developing fertility control for rodents: a framework for researchers and practitioners

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Integrative Zoology 2024年第1期19卷 87-107页

作者： Giovanna MASSEI Jens jacob Lyn A.HINDS Botstiber Institute for Wildlife Fertility Control Department of Environment and GeographyUniversity of YorkHeslingtonYorkUK Rodent Research Institute for Epidemiology and Pathogen DiagnosticsJulius Kühn–Institute(JKI)Federal Research Institute for Cultivated PlantsMünsterGermany CSIRO Health and Biosecurity CanberraACTAustralia

Fertility control is often heralded as a humane and effective technique for management of overabundant wildlife,including *** intention is to reduce the use of lethal and inhumane methods,increase farm productivity and food security as well as reduce disease transmission,particularly of *** developed a framework to guide researchers and stakeholders planning to assess the effectiveness of a potential contraceptive agent for a particular *** guidelines describe the overarching research questions which must be sequentially addressed to ensure adequate data are collected so that a contraceptive can be registered for use in broad-scale rodent *** framework indicates that studies should be undertaken iteratively and,at times,in parallel,with initial research being conducted on(1)laboratory-based captive assessments of contraceptive effects in individuals;(2)simulation of contraceptive delivery using bait markers and/or surgical sterilization of different proportions of afield-based or enclosure population to determine how population dynamics are affected;(3)development of mathematical models which predict the outcomes of different fertility control scenarios;and(4)implementation of large-scale,replicated trials to validate contraceptive efficacy under various management-scalefield *** some circumstances,fertility control may be most effective when integrated with other methods(*** culling).Assessment of non-target effects,direct and indirect,and the environmental fate of the contraceptive must also be *** fertility control for a species is a resource-intensive commitment but will likely be less costly than the ongoing environmental and economic impacts by rodents and rodenticides in many contexts.

关键词： captive studies field applications modeling oral contraceptive delivery population management rodents

Ultrastrong graphene sheets induced by nanoconfined water

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National Science Review 2024年第06期 96-98页

作者： jacob Klein Weizmann Institute of Science

Water and other solvents may exhibit unusual thermodynamic and kinetic properties when nano-confined, as demonstrated in several previous reports[1–4]. For example, extreme cylindrical nanoconfinement has been realized in carbon nanotubes [1], improving ethanol production by an order of magnitude,while the anomalous fluidity of nanoconfined water relative to nanoconfined organic solvents is important for lubrication [2,3].

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Imaging mass spectrometry:a molecular microscope for studying the role of lipids in Parkinson's disease

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Neural Regeneration Research 2024年第6期19卷 1179-1180页

作者： Vinata Vedam-Mai jacob M.Samuel Boone M.Prentice Department of Neurology University of FloridaGainesvilleFLUSA Department of Chemistry University of FloridaGainesvilleFLUSA

Parkinson's disease–A lipidopathy?The histopathological hallmark of Parkinson's disease(PD)and dementia with Lewy bodies are inclusions enriched inα-synuclein(α-syn),known as Lewy bodies,which are not only composed of proteins,but also a core of lipid *** has been thus far principally thought of as a“proteinopathy”caused by the misfolding of α-syn.

关键词： lipids species folding

Recycling of solid-state batteries—challenge and opportunity for a circular economy?

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Materials Futures 2024年第1期3卷 10-30页

作者： Martine jacob Kerstin Wissel Oliver Clemens 1 Department of Chemical Materials Synthesis University of StuttgartInstitute of Materials ScienceHeisenbergstraße 370569 StuttgartGermany Technical University of Darmstadt Institute of Materials ScienceAlarich-Weiss-Straße 264287 DarmstadtGermany

The tremendous efforts made in the research field of solid-state Li-ion batteries have led to considerable advancement of this technology and the first market-ready systems can be expected in the near *** research community is currently investigating different solid-state electrolyte classes(***,sulfides,halides and polymers)with a focus on further optimizing the synthesis and electrochemical ***,so far,the development of sustainable recycling strategies allowing for an efficient backflow of critical elements contained in these batteries into the economic cycle and thus a transition from a linear to a circular economy lags *** this contribution,resource aspects with respect to the chemical value of crucial materials,which are used for the synthesis of solid-state electrolytes are being ***,an overview of possible approaches in relation to their challenges and opportunities for the recycling of solid-state batteries with respect to different solid-state electrolyte classes by means of pyrometallurgy,hydrometallurgy and direct recycling/dissolution-based separation processes is *** on these considerations and with reference to previous research,it will be shown that different solid-state electrolytes will require individually adapted recycling processes to be suitably designed for a circular economy and that further improvements and investigations will be required.

关键词： solid-state batteries solid-state electrolyte recycling circular economy