Дисертації з теми "Dynamic Virtual Power Plants"
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Newman, Guy. "Characterisation of virtual power plants." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-virtual-power-plants(5e647750-5a44-40f0-8a33-763361d3a50b).html.
Повний текст джерелаSquillaci, Carmen. "Gestione dell’energia in Virtual Power Plants." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаHakobyan, Aram P. "Severe accident analysis using dynamic accident progression event trees." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158672136.
Повний текст джерелаYang, Weijia. "Dynamic Processes and Active Power Control of Hydropower Plants." Licentiate thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-262768.
Повний текст джерелаRousseau, Jean-Pierre. "Dynamic evaluation of the solar chimney." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1184.
Повний текст джерелаKim, Tae-Kyung. "Dynamic analysis of sulfur dioxide monthly emissions in U.S. power plants." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1086195964.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xviii, 218 p.; also includes graphics. Includes abstract and vita. Advisor: Jean Michael Guldmann, City and Regional Planning Graduate Program. Includes bibliographical references (p. 130-133).
Khamis, Ibrahim Ahmad 1956. "DYNAMIC SIMULATION OF A PROCESS INHERENT ULTIMATE SAFETY POWER PLANT (PIUS)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275565.
Повний текст джерелаWang, Shuwen. "Dynamic reliability using entry-time approach for maintenance of nuclear power plants." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2790.
Повний текст джерелаDelgado-Loperena, Dharma. "A stochastic dynamic model for human error analysis in nuclear power plants /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3137693.
Повний текст джерелаMerante, Marco. "Application of dynamic rating to improve transportation capability of the power systems connected to wind power plants." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200930.
Повний текст джерелаFlödet genom elnätet förändras på grund av införandet av ny generering och nya typer av laster.Specifikt är svaga luftledningar en begränsning för installation av vindkraft som ligger långt fråndet centrala nätet. Den nuvarande situationen kräver smarta lösningar för att förbättratransportkapaciteten i elnätet. Bland de olika möjligheterna finns Dynamic Line Rating (DLR) somframstår som den mest intressanta lösningen från både ekonomiska och tekniska synvinklar. Det härexamensarbetet behandlar resultatet av DLR från både teoretiska och praktiska perspektiv.Den teoretiska grunden för DLR är baserad på utvecklingen av en termisk modell som kan skattatemperaturen i luftledningar under olika klimatförhållanden. Examensarbetets första del behandlaren undersökning av IEEE 738 standarden (DLR standard). IEEE 738 standarden utgår från ledarensom en perfekt cylinder. Något som har en effekt bland annat i effekten av vindriktning. Ettvindtunnel test har utförts för att verifiera effekten av fler kardelers effekt på den totala termiskajämvikten. Resultaten visar att antalet kardeler har en betydande effekt på den termiska jämviktenoch då alltså även på DLR.Den andra delen av examensarbetet innehåller en omfattande litteratursökning på de olikaapparaterna som kan användas till DLR samt en praktik undersökning/analys. Analysen utförs föratt utvärdera vilken lösning som kan vara den bästa vid införandet av mer vindkraft, som ökarbelastningen på en redan existerande luftledning. Resultaten visar att, i det valda området,Värmland, i sydvästra Sverige, har DLR förutsättningar för att medge ökat utnyttjandet av den storavindkraft resurs som finns där till relativt låga kostnader. Slutsatsen av examensarbetet är att DLR ger tekniska och ekonomiska fördelar tillsystemoperatören.
Bø, Torstein Ingebrigtsen. "Dynamic Model Predictive Control for Load Sharing in Electric Power Plants for Ships." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18749.
Повний текст джерелаKim, Young-Oh. "The value of monthly and seasonal forecasts in Bayesian stochastic dynamic programming /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/10142.
Повний текст джерелаAndersson, Eva. "Development of a dynamic model for start-up optimization of coal-red power plants." Thesis, KTH, Reglerteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-125808.
Повний текст джерелаYang, Weijia. "Hydropower plants and power systems : Dynamic processes and control for stable and efficient operation." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-318470.
Повний текст джерелаIrigoyen, Tineo Aralar. "A study on the profitability of Virtual Power Plants and their potential for compensation of imbalances." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-270724.
Повний текст джерелаI den nuvarande klimatkrisen finns det ett ökande behov av integration av en högre andel förnybar energi, vilket ökar behovet av innovationer inte bara inom tekniken utan också i nya affärsmodeller. Virtuella kraftverk (Virtual Power Plants VPP) är en aggregeringsmodell för produktion som sägs kunna minska obalansen från förnybar produktion samtidigt somden förbättrar det ekonomiska utfallet. Ä ven om förordningen i vissa länder fortfarande intetillåter denna typ av verksamhet finns det också många andra där aggregering av efterfrågan och till och med VPP växer i antal. Denna studie syftar till att visa på nyttan av VPP och kvantifiera mängden obalanser som kan kompenseras och de orsakade obalans-kostnader som undviks för en VPP som ligger i norra Portugal som består av ett vattenkraftverk med pumplagring och vindkraft på land. För att göra det har två fallstudier jämförts: ett basfall där varje enhet drivs oberoende och en annan där alla enheterna är aggregerade enligt VPPmodellen. Med detta syfte har en förenklad budstrategi simulerats för båda fallen och tre olika nivåer på fel i prognoser för att slutligen kunna jämföra resultaten genom fyra olika indikatorer (KPI:er): vinstökning, ökning av intäkter, minskning av obalans och minskning av obalanskostnader. Optimeringsproblemet formulerades som ett mixed-linear-integer programmeringsproblem (MILP) och det genomfördes i två steg: ett för dagenföremarknaden och ett andra för intradagsmarknaden. Detta syftar till att diversifiera produktionsportföljen för vattenkraftverket och dela den mellan de tillgängliga produkterna: energi som säljs i den kommande marknaden, kapacitetsreserver för sekundära reserver och energi som säljs som tertiära reserver. I studien har vi valt en deterministisk strategi med beaktande av ett scenarioträd med respektive sannolikheter. För att formulera dessa scenarier användes historiska data på grund av den stora korrelationen mellan marknadsvariablerna. Resultaten visar att en genomsnittlig årlig minskning av energiavvikelserna med 16% skulle kunna uppnås vilket innebär en minskning av obalanskostnaderna med 16,3%. Dessutom konstaterades det att den kombinerade driften av tillgångarna på intradagsmarknaden, tillsammans med minskningen av obalanser, skulle leda till en vinstökning på 1% med en minskning av intäkterna på 0,1%, från vilket vi drar slutsatsen att en mer detaljerad och datakrävande modell skulle krävas för att analysera VPP-modellens fulla potential när mananvänder tillgångarna tillsammans även under dagenföremarknaden.
Assémat, Céline. "Management of thermal power plants through use values." Thesis, KTH, Elektriska energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175811.
Повний текст джерелаRyan, Tim. "In Harmony : Virtual Power Plants: Predicting, Optimising and Leveraging Residential Electrical Flexibility for Local and Global Benefit." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285482.
Повний текст джерелаFlexibilitet i efterfrågan av elektricitet är essentiellt för att möjliggöra ett elnät med låga kostnader och utsläpp. I denna studie undersöks elanvändning av en bostad samt flexibilitet i perspektiv från en virtuell kraftverksoperatör. Individuell och sammanlagd konsumtion analyseras genom tillgång av data från >10 000 bostäder över 6 år. Begränsningar av säkerhet, komfort och tillgänglighet identifieras per tillgångstyp. Sammanlagda flexibiliteten analyseras genom en kombination av tidigare data och principiella beräkningar, med flexibilitet kvantifierad för diverse produkter och kontrollmetoder. En modell för maskininlärning utvecklades för 200 bostäder och förutser konsumtion 24 timmar i förväg. Den beräknade flexibiliteten och tillgångsbegränsningar används sedan i en optimeringsmodell som utnyttjar flexibilitet och kombinerar värdet av självkonsumtion och optimerat pris för nästkommande dag för ett bostadshus.
Gencoglu, Cihangir. "Assessment Of The Effect Of Hydroelectric Power Plants'." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612165/index.pdf.
Повний текст джерелаEdwall, Bill. "Virtual Power Plant Optimization Utilizing the FCR-N Market : A revenue maximization modelling study based on building components and a Battery Energy Storage System. Based on values from Sweden's first virtual power plant, Väla." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279520.
Повний текст джерелаDå förnyelsebara energiresurser antas omfatta en större roll av den svenska elproduktionen inom kommande år, så kan detta leda till att frekvensfluktueringar i elnätet ökar. Detta sker på grund av att den oregelbundna elproduktionen från förnyelsebara energiresurser inte matchas med konsumtion. Om dessa fluktueringar inte hanteras kan det i sin tur leda till skadliga störningar inom elnätet. För att motverka detta och således stabilisera elnätet används diverse lösningar. Ett sätt att åstadkomma ökad stabilisering i elnätet är att låta privata aktörer kraftreglera. De privata aktörerna som står för kraftregleringen gör detta i utbyte mot ekonomisk kompensation, genom att delta i reservmarknader. Den reservmarknad som studerades inom detta examensarbete kallas Frequency Containment Reserve – Normal (FCR-N). I nuläget står vattenkraft för nästan all reglerad kraft inom den här marknaden. Men då behovet av kraftreglering antas öka inom kommande år så behövs nya teknologier studeras som kan bistå med kraftregleringen. Den studerade teknologin inom detta examensarbete var ett virtuellt kraftverk. Då inga virtuella kraftverk var i bruk i Sverige då denna uppsats skrevs fanns det osäkerheter kring hur man optimalt styr ett virtuellt kraftverk och de ekonomiska fördelarna som detta skulle kunna leda till. Detta examensarbete modellerade och optimerade ett virtuellt kraftverk ur ett vinstperspektiv. Det virtuella kraftverket var uppbyggt utav kylmaskiner, ljus, ventilationsfläktar och ett batterisystem. Deras kraftkonsumtion styrdes på ett sådant sätt som lätt de bidra till kraftreglering på reservmarknaden. För att kunna analysera de ekonomiska resultaten från det optimerade virtuella kraftverket, så byggdes en jämförelsemodell. Denna jämförelsemodell är baserad på en semistatisk linjär modell, vilket är det som examensarbetets industripartner Siemens använder. Den ekonomiska jämförelsens resultat påvisade att inkomsten från den optimerade modellen var minst 85% högre än den semistatiskt linjära modellen, inom de studerade scenarierna. Denna inkomstökning skulle potentiellt kunna öka användningen av virtuella kraftverk på den svenska reservmarknaden vilket i sin tur skulle medföra högre stabilitet på elnätet. Genom att öka stabiliteten på elnätet kan således förnyelsebara energiresurser i sin tur lättare implementeras.
Jayam, Prabhakar Aditya. "Application of STATCOM for improved dynamic performance of wind farms in a power grid." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Jayam_Prabhakar_09007dcc804f7428.pdf.
Повний текст джерелаVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 12, 2008) Includes bibliographical references (p. 64-66).
Uong, Hoang. "The application of the ordered list method and the dynamic programming to the unit commitment." PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/3948.
Повний текст джерелаAlthoff, Eric C. "Detailed and Simplified Structural Modeling and Dynamic Analysis of Nuclear Power Plant Structures." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492642525831339.
Повний текст джерелаMedel, Vera Carlos Pablo. "Seismic probabilistic safety assessment and risk control of nuclear power plants in Northwest Europe." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/seismic-probabilistic-safety-assessment-and-risk-control-of-nuclear-power-plants-in-northwest-europe(c51a155a-289b-40c0-a642-644cb527939b).html.
Повний текст джерелаCilliers, Anthonie Christoffel. "A deterministic approach for establishing a narrow band dynamic operating envelope to detect and locate hardware deterioration in nuclear power plants." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9001.
Повний текст джерелаThesis(PhD (Nuclear Engineering))--North-West University, Potchefstroom Campus, 2013.
Ogden, Lillie. "Exploring Opportunities for Novel Electricity Trading Strategies within a Virtual Power Plant in the European Power Market : New Possibilities in Power Trading Due to the Increased Share of Variable Renewable Energy." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277841.
Повний текст джерелаDenna rapport undersöker effekterna av variabel förnybar energi (VRE) på krafthandeln på den europeiska elhandelsmarknaden för stora aktörer. Den komplicerade driften av ett typiskt kraftutbyte i Europa åtföljs av ett lika komplicerat balanseringssystem. Den ökande mängden VRE i kraftsystemet, såsom vind- och solkraft, har långtgående effekter för krafthandlare på både denna elmarknad och motsvarande balanseringssystem. Som ett resultat utvecklas elmarknaden på enastående sätt och nya deltagare kommer in på spelplanen för att dra nytta av den förändrade dynamiken som orsakas av VRE-generatorer. En ny spelare, det virtuella kraftverket (VPP), har en fördel jämfört med andra marknadsaktörer genom att samla VRE-generatorer med styrbara förnybara energiproducenter, som biogas och vattenkraftverk, till en enhet. Detta gör att VPP både kan få tillgång till live VRE-produktionsdata som större anläggningar inte har, som den sedan använder för att distribuera olika underpooler av tillgångar och för att tillhandahålla balanstjänster till nätet. Därefter kan VPP: er handla med VRE och annan förnybar el på ett överlägset sätt på samma spotmarknader och balanseringssystem som stora centrala kraftverk och industrikonsumenter. Rapporten visar att VPP-handlare kan göra vinster genom innovativa handelsstrategier som utnyttjar förutsägbara marknadseffekter orsakade av VRE-kraft genom en detaljerad förståelse för elmarknaden och unik tillgång till data för produktionen av förnybar energi
QC 20201118
Anghilante, Régis. "Flexibilisation and integration of solid oxide electrolysis units in power to synthetic natural gas plants." Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0094.
Повний текст джерелаThe solid oxide electrolysis technology (SOE) could improve the conversion efficiency of power-tosynthetic natural gas (SNG) plants and reduce their costs, provided that i) a performant thermal integration is implemented ii) the technology is implemented at industrial scale, and iii) plants can absorb the intermittency of renewable power sources. First, the energy analysis of three innovative power-to-SNG plant concepts is implemented. For each concept, a full explicit thermal integration is proposed. Plants with integrated SOE units show efficiencies higher than 78.5% (based on the HHV of the SNG) for the production of CNG and LNG, significantly higher than plants with PEM units with a 64.4% efficiency for CNG production. Second, the thermal response of SOE units to electrical power loads is investigated with a 1D dynamic model at the cell level (SOEC). Electrolyte support cells present a higher thermal stability than electrode support cells and should be preferred for fluctuating power applications. The model was then extended to a full H2 production and storage unit and coupled with different electrical power profiles. The units shows an energy consumption of 3.4-3.8 kWh·Nm-3 H2 and a high power-to-H2 conversion efficiency (93-103%) because of the steam recovery from the methanation unit. A first dimensioning of the H2 storage tank and the methanation unit is proposed, assuming a windmill power profile. Fluctuating power profiles reduce the efficiency of power-to-SNG plants, increase their costs and complexify their operation. Multifuel plants seem to be the most promising option to tackle the issue of intermittent power production. Extending the operation range of SOECs to exothermic and endothermic modes would improve power-to-H2 conversion efficiencies compared to on/off operation. In case of constant power load though, SOECs should preferably be operated at the thermoneutral point or in exothermic mode. Third, SNG production costs corresponding to the aforementioned plant concepts are evaluated, starting with a bottom-up cost evaluation of SOE units. The SNG production costs are in the range of 82-89 €·MWh-1 CH4 (HHV) with SOE units, which is lower than with PEM units, but remains two times higher than the average price of conventional natural gas for all sectors in France
Raab, Andreas Franz Alois [Verfasser], Kai [Akademischer Betreuer] Strunz, Antonello [Gutachter] Monti, and Olav B. [Gutachter] Fosso. "Operational planning, modeling and control of virtual power plants with electric vehicles / Andreas Franz Alois Raab ; Gutachter: Antonello Monti, Olav B. Fosso ; Betreuer: Kai Strunz." Berlin : Technische Universität Berlin, 2018. http://d-nb.info/115618522X/34.
Повний текст джерелаSheblé, Gerald B. "Unit commitment for operations." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49977.
Повний текст джерелаPh. D.
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Deb, Abhishek. "HW/SW mechanisms for instruction fusion, issue and commit in modern u-processors." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/81561.
Повний текст джерелаEn aquesta tesis hem explorat el paradigma de les màquines issue i commit per processadors actuals. Hem implementat una màquina virtual que tradueix binaris x86 a micro-ops de tipus RISC. Aquestes traduccions es guarden com a superblocks, que en realitat no és més que una traça de virtuals co-dissenyades. En particular, hem proposat mecanismes hw/sw per a la fusió d’instruccions, blocs bàsics. Aquests superblocks s’optimitzen utilitzant optimizacions especualtives i d’altres no speculatives. En cas de les optimizations especulatives es consideren mecanismes per a la gestió de errades en l’especulació. Al llarg d’aquesta tesis s’han fet les següents contribucions: Primer, hem proposat una nova unitat functional programmable (PFU) per tal de millorar l’execució d’aplicacions de proposit general. La PFU està formada per un conjunt d’unitats funcionals, similar al CCA, amb un banc de registres intern a la PFU distribuït a les unitats funcionals que la composen. Les entrades de la macro-operació que s’executa en la PFU es mouen del banc de registres físic convencional al intern fent servir un conjunt de moves i loads. Un algorisme de fusió combina més micro-operacions en temps d’execució. Aquest algorisme es basa en un pas de planificació que mesura el benefici de les decisions de fusió. Les micro operacions corresponents a la macro operació s’emmagatzemen com a senyals de control en una configuració. Les macro-operacions tenen associat un identificador de configuració que ajuda a localitzar d’aquestes. Una petita cache de configuracions està present dintre de la PFU per tal de guardar-les. En cas de que la configuració no estigui a la cache, les configuracions es carreguen de la cache d’instruccions. Per altre banda, per tal de donar support al commit atòmic dels superblocks que sobrepassen el tamany del ROB s’ha proposat un mecanisme de commit especulatiu. Per aquest mecanisme hem proposat una taula de mapeig especulativa dels registres, que es copia a la taula no especulativa quan totes les instruccions del superblock han comitejat. Segon, hem proposat un processador en order co-dissenyat que combina dos tipus d’acceleradors. Aquests acceleradors executen un parell d’instruccions fusionades. S’han considerat dos tipus de fusió d’instructions. Primer, combinem un parell de loads independents formant loads vectorials i els executem en una unitat vectorial. Segon, fusionem parells d’instruccions simples d’alu que són dependents i que s’executaran en una Interlock Collapsing ALU (ICALU). Per altra aquestes tecniques les hem evaluat conjuntament amb diverses optimizacions com list scheduling, load-store telescoping i hoisting de loads, entre d’altres. Aquesta proposta ha estat comparada amb un processador fora d’ordre. Tercer, hem proposat un processador fora d’ordre co-dissenyat efficient reduint-ne la complexitat en dos areas principals. En primer lloc, hem co-disenyat el mecanisme de commit per tal de permetre un eficient commit atòmic del superblocks. En aquesta solució hem substituït el ROB convencional, i en lloc hem introduït el Superblock Ordering Buffer (SOB). El SOB manté l’odre de programa a granularitat de superblock. L’estat del programa consisteix en registres i memòria. L’estat dels registres es manté en una taula per superblock, mentre que l’estat de memòria es guarda en un buffer i s’actulitza atòmicament. La segona gran area de reducció de complexitat considerarada és l’ús de FIFOs a la lògica d’issue. En aquest últim àmbit hem proposat una heurística de distribució que solventa les ineficiències de l’heurística basada en dependències anteriorment proposada. Finalment, i junt amb les FIFOs, s’ha proposat un mecanisme per alliberar les entrades de la FIFO anticipadament.
Hilal, Alaa. "Magnetic components modeling including thermal effects for DC-DC converters virtual prototyping." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10313/document.
Повний текст джерелаThe increasing complexity of power electronic devices requires the intervention of computer-aided design in electrical engineering. Development of electric/electronic systems nowadays is carried out by the help of virtual prototyping, in which simulation software are used to predict components behavior without investing time and money to build physical prototypes. The increasing demand of low power, high efficiency devices forced designers to precisely analyze losses in each component constituting the system. Magnetic components constitute a major part of electronics devices. Therefore accurate modeling of magnetic materials is mandatory in order to predict their realistic behavior under variable operating conditions. Our work takes place in this context by proposing a non-linear dynamic model of magnetic components for use in circuit simulators. It includes the material nonlinear hysteretic and dynamic behaviors with accurate modeling of winding and core losses in addition to thermal effects that are not taken into account by existing models. The model is based on the principle of separation of static and dynamic contributions as well as Bertotti’s theory. VHDL-AMS is used as a modeling language due to its multi-domain modeling feature, allowing coupling with a thermal model. The magnetic component model is implemented in circuit simulation software “Simplorer” It is then tested in a widely used power converter application, the buck converter, to ensure non conventional excitation. The model is validated for different core inductors, different current ripples, different loads, different temperatures and a wide frequency range
CRUZ, JULIO R. B. "Procedimento analitico para previsao do comportamento estrutural de componentes truncados." reponame:Repositório Institucional do IPEN, 1998. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10665.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:07:05Z (GMT). No. of bitstreams: 1 06110.pdf: 5239500 bytes, checksum: 175d6a6c784cd8fbadb485e4c6d90285 (MD5)
Tese(Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Sastry, Jyoti. "Direct AC control of grid assets." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41109.
Повний текст джерелаФедорчук, Станіслав Олегович. "Забезпечення заявлених графіків генерації відновлюваних джерел енергії на основі концепції віртуальних електричних станцій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42334.
Повний текст джерелаDissertation for the degree of candidate of technical sciences (doctor of philosophy) in specialty 05.14.02 - Electric power stations, networks and systems (141 - Power engineering, electrical engineering and electromechanics). – National Technical University "Kharkiv Polytechnic Institute", Ministry of Education and Science of Ukraine, Kharkiv, 2019. Annotation content. The dissertation is devoted to solving the actual scientific and applied problem in the providing the stated schedules of power generation at renewable energy sources (RES) through the use of storage systems and the concept of virtual power plants. According to the legislation of Ukraine, the Guaranteed Buyer must purchase all energy from renewable energy producers operating under the Green Tariff. The peculiarity of the operating modes of power plants on renewable sources is almost a direct dependence on weather conditions, which leads to deviations of the power value at the points of generation from the declared values. Therefore, there is a need to compensate for emerging imbalances. Using the concept of virtual power plants that combine RES, active consumers and storage systems into a single station with a common control system, it is possible to reduce imbalances at the generation point. This requires the creation of methods for selecting the optimal layout of the accumulation systems; control systems algorithms for virtual power plants and distributed storage systems; recommendations for their application to power grids that are just beginning to transition from traditional to intelligent and have a lack of maneuverability. The development of technical measures to ensure the declared schedules of solar power plants (SPP) and wind power plants (WPP) will allow them to be integrated into the generation schedule as base stations. This will make it possible to fulfill the obligations of all participants of the process and not violate the planned operating modes of other stations. The purpose and tasks of the study. The purpose of the study is to provide the stated schedules of power generation at the generation site of renewable energy sources through the use of storage systems and the concept of virtual power plants. To achieve the goal, the research objectives are defined: – to analyze the basic methods and means of providing the schedules of power outputs of renewable energy sources in Ukraine and the world and the factors that influence them; – to develop a mathematical model for the study of operating modes of hybrid power plants based on solar and wind power plants and to check the adequacy of the developed mathematical model; – clarify the methodology for calculating the cost of electricity from storage systems at the generation site, taking into account losses in energy transmission and conversion; – improve the method of optimization of the configuration of accumulation systems for balancing the generation of SES and WPP, while minimizing the specific cost of electricity; – carry out computer simulation of the operation of renewable energy power plants based on the weather data of the selected administrative district of Ukraine in order to determine the required configuration of the accumulation system based on the developed methodology; – to develop a computer model of a virtual power plant that combines advanced mathematical models of SES and WPP power generation, computer models of energy storage systems, imitation of active consumers and the energy market, as well as elements of hardware and computer modeling. – to develop an algorithm of operation of the information and control system of the virtual power plant, based on the specified method of calculating the cost of electricity, and to test it on a computer model of the virtual power plant. – explore the possibility of applying the concept of virtual power plants to provide daily generation schedules, taking into account the requirements of the Guaranteed Buyer. The object of research is the electromagnetic processes in grids with power plants based on renewable energy sources. Subject of research – electrical and information parameters of modes of equipment of power plants on renewable energy sources. Scientific novelty: 1) The mathematical model of the virtual power plant has been further developed, which differs from the existing ones by adding elements for communication with the real programmable logic controller OVEN 110-60 and based on the regression analysis the additional coefficient of the ratio of incoming weather conditions and the resulting power is taken into account the real characteristics of the equipment, which allowed to apply hardware and software modeling, to increase the accuracy of the calculation of the output active power of solar panels at 5% and conduct simulations of wind power station at wind speeds greater than nominal. 2) The method of calculating the cost of electricity, which is used to provide daily schedules of generation of RES on the basis of accumulation within one virtual power station, which differs from the known costs related to the location, installation and operation of additional equipment, which improves the accuracy of calculations, was further developed. and to increase the energy efficiency of such systems by utilizing their most relevant elements. 3) It is scientifically and technically grounded to use the concept of virtual power plants for providing daily schedules of generation of solar and wind power plants in the conditions of the energy market of Ukraine, which will allow to ensure the functioning of the Guaranteed Buyer mechanism with minimal use of additional maneuvering capacities. Practical value: The practical value of the work lies in the fact that methods of optimization of modes of operation of power plants on renewable energy sources by means of accumulation are determined on the basis of the performed researches. This approach will allow to establish the correspondence between the current and the predicted value of power at the point of generation, to form a schedule of load for traditional power plants without the need for additional maneuvering for compensation of power plants on renewable energy sources. In addition, research findings will help to increase the accuracy of electricity cost calculations at the point of generation from storage systems. The developed method of choosing the configuration of accumulation systems allows to determine the minimum required capacity of energy storage and their capacity, which will minimize the cost of equipment. The proposed algorithm for managing a distributed accumulation system allows to solve the problem of distributed balancing, and also takes into account the possibility of involving active consumers and the energy market in the balancing process. The results of the dissertation work were introduced: - at LEO LLC to calculate the minimum required volume of energy storage systems that will be recommended to provide the stated generation schedules of power plants than work based on green tariff; - in the educational process of the National Technical University "Kharkiv Polytechnic Institute" for students of specialties 141 specialties in specialization: 141- 01 "Power Plants" and 141-05 "Energy Management and Energy Efficient Technologies" during the teaching of lectures on disciplines "Electrical part of stations and substations "," ACTSP of stations and substations "," Renewable energy systems and secondary energy resources ", during writing of diploma projects, final qualification works. The dissertation is executed according to the plans of scientific researches of the National Technical University "Kharkiv Polytechnic Institute" of the Department of Power stations and general electrical engineering in accordance with the economic agreement « Methods of improvement of power systems» (state registration number - 0116U000885).
Hernández, Tannia Karina Vindel. "Uma proposta de integração da geração distribuída, por meio das usinas virtuais, ao sistema elétrico do Estado de São Paulo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/106/106131/tde-21052015-164508/.
Повний текст джерелаThis Thesis presents contributions for the planning of the electrical system of São Paulo State Brazil, emphasizing benefits obtained with a better integration of renewables (mainly solar photovoltaics, wind energy, from municipal solid waste and sugarcane vinasse) aiming energy security and independence, loss reduction and environmental benefits. For this, the concept of VPP Virtual Power Plant is introduced, in which a better and broader use of energetic resources, geographically dispersed, including distributed microgeneration, autoproduction, cogeneration, and even nonrenewable sources, is facilitated. Those disperse energy resources, in general located near the consumer, are grouped and jointly managed, in order of to satisfy the demand requirements, using Smart Grid and Information and Telecommunication Technologies, and making the VPP to act, for the transmission or distribution system point of view, as a conventional large electrical power plant. An analysis and forecasts of the operation of the Brazilian Southeast/Center West (SE/CO) subsystem, with special focus on São Paulo State electrical system, and its interactions with the Brazilian Interconnected Electrical System (SIN), is presented.
Федорчук, Станіслав Олегович. "Забезпечення заявлених графіків генерації відновлюваних джерел енергії на основі концепції віртуальних електричних станцій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42333.
Повний текст джерелаDissertation for the degree of candidate of technical sciences in specialty 05.14.02 - power plants, networks and systems. - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The thesis is devoted to the solution of the current scientific and applied problem in the field of providing the declared schedules of generating power plants with renewable energy sources based on the concept of virtual power plants. In the dissertation work, the methods of providing the declared schedules of generating power plants on renewable energy sources are investigated. The expediency of using the concept of virtual power plants to solve the problem is justified. The use of various types of accumulation systems as one of the elements of a virtual power plant is investigated. The analysis of existing methods and state-of-the-art-practices of implementing intelligent networks was carried out, which made it possible to select the Smart Grid Architecture Model pattern as the basis for creating the necessary infrastructure. The analysis of existing methods for determining the optimal capacity of accumulation systems and their layout has been carried out that was used to calculate minimal capacity for providing the declared schedules of generation of PV and wind power plant each 1 MW for one of the administrative centers of Ukraine. The developed computer model for studying the operation of virtual power plants that include PV and wind power with energy storage and connections to PLC allows assessing potential unbalances during generation, checking the sufficiency of the capacity of accumulation systems for various tasks, as well as testing the operation of the control system. The methodology for calculating the cost of electrical energy from storage systems has been refined, taking into account the cost of energy losses during transmission and transformation, as well as additional factors associated with renting and servicing. An algorithm for managing a virtual power plant was developed, implemented and tested with real PLC connected to mathematical model, based on using the cheapest energy source for balancing taking into account the limitations of electrical networks, power lines and transforming equipment, access to the energy market for buying and selling energy and the ability to attract active consumers. The possibility of providing the declared schedules of generation of power plants based on the concept of virtual power plants on the example of conditions of one of the administrative centers of Ukraine is shown.
Peeters, Agnes. "Application of the Stimulus-Driven Theory of Probabilistic Dynamics to the hydrogen issue in level-2 PSA." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210641.
Повний текст джерелаCes accidents sévères dépendent non seulement de défaillances matérielles ou d’erreurs humaines, mais également de l’occurrence de phénomènes physiques, tels que des explosions vapeur ou hydrogène. La prise en compte de tels phénomènes dans le cadre booléen des arbres d’événements s’avère difficile, et les méthodologies dynamiques de réalisation des EPS sont censées fournir une manière plus cohérente d’intégrer l’évolution du processus physique dans les changements de configuration discrète de la centrale au long d’un transitoire accidentel.
Cette thèse décrit l’application d’une des plus récentes approches dynamiques des EPS – la Théorie de la Dynamique Probabiliste basée sur les Stimuli (SDTPD) – à différents modèles de déflagration d'hydrogène ainsi que les développements qui ont permis cette applications et les diverses améliorations et techniques qui ont été mises en oeuvre.
Level-2 Probabilistic Safety Analyses (PSA) of nuclear power plants aims to identify the possible sequences of events corresponding to an accident propagation from a core damage to a potential loss of integrity of the containment, and to assess the frequency of occurrence of the different scenarios.
These so-called severe accidents depend not only on hardware failures and human errors, but also on the occurrence of physical phenomena such as e.g. steam or hydrogen explosions. Handling these phenomena in the classical Boolean framework of event trees is not convenient, and dynamic methodologies to perform PSA studies are expected to provide a more consistent way of integrating the physical process evolution with the discrete changes of plant configuration along an accidental transient.
This PhD Thesis presents the application of one of the most recently proposed dynamic PSA methodologies, i.e. the Stimulus-Driven Theory of Probabilistic Dynamics (SDTPD), to several models of hydrogen explosion in the containment of a plant, as well as the developed methods and improvements.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Rezgui, Abir. "Interopérabilité de modèles dans le cycle de conception des systèmes électromagnétiques via des supports complémentaires : VHDL-AMS et composants logiciels ICAr." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00858315.
Повний текст джерелаMatos, João Miguel Bico Alves. "Commercial Demand Response in Virtual Power Plants." Master's thesis, 2021. https://hdl.handle.net/10216/133033.
Повний текст джерелаMatos, João Miguel Bico Alves. "Commercial Demand Response in Virtual Power Plants." Dissertação, 2021. https://hdl.handle.net/10216/133033.
Повний текст джерелаSingh, Mohit 1982. "Dynamic models for wind power plants." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-3809.
Повний текст джерелаtext
Ravichandran, S., A. Vijayalakshmi, K. S. Swarup, Haile S. Rajamani, and Prashant Pillai. "Short term energy forecasting techniques for virtual power plants." 2016. http://hdl.handle.net/10454/11101.
Повний текст джерелаThe advent of smart meter technology has enabled periodic monitoring of consumer energy consumption. Hence, short term energy forecasting is gaining more importance than conventional load forecasting. An Accurate forecasting of energy consumption is indispensable for the proper functioning of a virtual power plant (VPP). This paper focuses on short term energy forecasting in a VPP. The factors that influence energy forecasting in a VPP are identified and an artificial neural network based energy forecasting model is built. The model is tested on Sydney/ New South Wales (NSW) electricity grid. It considers the historical weather data and holidays in Sydney/ NSW and forecasts the energy consumption pattern with sufficient accuracy.
Jhong, Hau-Chen, and 鍾晧晨. "The Economic Benefits Analysis and Policy Recommendation of Virtual Power Plants." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/31869071367492695629.
Повний текст джерела國立中興大學
應用經濟學系所
104
The core value of virtual power plants is that they can integrate dispersed and sporadic virtual peaking capacity to lower the power demand with the power plant during the peak time, to achieve the goal of lower the power demand of the electricity system during the peak time. The effective function of virtual power plants depends on whether the majority of electric power customers are willing to participate the integration program of distributed generations and flexible pricing program programs or not. Due to the conditions of different types of electric power customers (such as whether their electrical behavior is flexible or not, whether they have own distributed power generation equipment or not, etc.), they will have different benefits and costs when they take part in the flexible pricing program which were executed by virtual power plants. Therefore, this study aims to use a quantitative economic benefit model to identify low-voltage lighting customers’, high-voltage customers’ and the whole society’s economic benefits and opportunity costs when they participate in virtual power plants’ operation, and continuously assess whether the participation of the electric power customers and whole society have economic feasibility or not, and make related policy recommendation base on the simulation result. According to the empirical analysis of this study, it shows that whether low-voltage lighting customers are willing to involve in the operation of virtual power plants or not, the most relevance is the discount of the demand charge of the flexible pricing program, and the economic benefits of participate in the operation of virtual power plant can’t be raised by changing the behavior (in basic simulation scenario, when the low-voltage lighting customer only participate the flexible pricing program, his BCR is 0.8732. The demand charge discount and energy charge discount were raised around 1.5 times in alternative plan, BCR were1.24 and 0.91;if we double the curtails times and the curtails kW number in summer months, the BCR would become 0.5 and 0.526); if the high-voltage customer can integrate and utilize his own distributed power generation equipment effectively to participate the operation of virtual power plants, under our simulation result, his NPV will be 2667931(NTD), and BCR will be 1.53, then it will have huge economic benefits. Moreover, from the holistic viewpoint of the society, if we can encourage electric power customers to join the flexible pricing program actively and construct more renewable energy generation equipment to supply power use, or store the electricity energy storage system further for emergency, it will help to slow down the building of peak load power plants, save the capacity avoided cost, and help to reduce the carbon emission at the same time. According to the simulation result of our empirical analysis, we have three mainly policy recommendations. The first is Taiwan Power Company should properly raise the current discount of basic demand charge in the Demand Bidding Program up to 100 (NTD / per kW per month) or more, to increase the incentive compatibility and make customers have motivations to coordinate with the energy conservation policy of the government. The second is the government can develop virtual power plant or similar industries like Aggregator, to integrate the low-voltage lighting customer of low electric demand and let the low-voltage lighting customer have more opportunities of the self-selection pricing scheme. In short, by implementing crowdsourcing to achieve the energy conservation policy. The last one is the plan of the electricity policy should be state with cross-system idea, not just enhance the connection among renewable energy itself but the connection between renewable energy, energy storage system and flexible pricing program, using the new technology of the energy management to systematically integrate the supply and demand agent.
Wei, Chien-yu, and 衛建宇. "Study on Operation Strategy of Virtual Power Plants in Electricity Markets." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/97677712632750832508.
Повний текст джерела國立中山大學
通訊工程研究所
102
In recent years, the concept of the virtual power plant is receiving a great deal of attention in the literature because of owing the following two potentials. One is that the virtual power plant can protect the power system by controlling the demand response customers and the energy storage systems to confine the power demand to the power system restriction. The other is that the virtual power plant can integrate the renewable power with the power system. By controlling the energy storage systems, the virtual power plant can solve the harmful impact of the renewable power. Although the virtual power plant benefits the power system, the investigators are wondering about the profit of running the virtual power plant. For this reason, we aim to study a way on earning the profit by controlling the demand response customers and the energy storage systems. With the proposed method, the business owners can understand how to run the virtual power plant.
Wen-JunTang and 唐文俊. "Network Protection, Optimal Operation, and Bidding Strategy of Virtual Power Plants." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/nw82x4.
Повний текст джерела國立成功大學
電機工程學系
107
In light of the development of renewable energy and concerns over environmental protection, renewable energy resources have become a trend in distribution systems. Accordingly, the dispatch strategy of the system need to be changed. As an aggregator involved in various renewable energy sources, energy storage systems, and loads, a virtual power plant plays a key role as not only a consumer but a prosumer. The structure also transform the traditional one-direction power delivery to bi-direction. The virtual power plant thus can enable itself to supply energy and ancillary services to the utility grid to maximize its profit. To deal with the security, dispatch, operation and bidding issues faced by VPP, this dissertation proposes an overcurrent protection strategies with distributed generations and fault current limiters, the demand response potential analysis, elasticity demand response model construction, and operation and bidding strategy determination. By scheduling the energy storage systems, demand response, and renewable energy sources, virtual power plants can join bidding markets to achieve maximum benefits. The potential uncertainties caused by renewable energy sources and the demand response are considered in a robust optimization model. Moreover, a bi-level game theory model is introduced to modify the bidding environment among market operators and all the participants. The numerical results demonstrate the stable operation and profit maximized can be achieved through the proposed adaptive protection scheme and operation and bidding strategy optimization. By involving the uncertainty consideration and thus getting rid of penalty due to failing to provide the winning ancillary service quantity, the economic efficiency is proved to be increased.
Tsai, Zon Yan, and 蔡忠諺. "Dynamic Stability Enhancement of Nuclear Power Plants in Taiwan Power System Using STATCON." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/88709980076599464503.
Повний текст джерела國立成功大學
電機工程學系
86
This thesis investigates the application of static condensers (STATCON)to enhance dynamic stability of nuclear power plants in Taiwan PowerSystem. The studied system containing identical parallel operatedturbogenerators is employed to analyze the effectiveness of the proposed STATCON with reactive power modulation. Two proportional-integral-derivative (PID) controllers using speed deviations of the studiedgenerators as feedback signals are designed by modal control theory to modulate the var flow of the STATCON. In order to have a complete and detailed research, a frequency-domain approach based on eigenvalue analyses and a time-domain approach based on nonlinear model simulation are both performed to validate the effectiveness of the proposed damping method. It can be concluded from the simulation results that the proposed damping scheme can both effectively enhance the dynamic stability of the studied system and increase the maximum transferred power of the transmission line.
Harun, Noorlisa. "Dynamic Simulation of MEA Absorption Process for CO2 Capture from Power Plants." Thesis, 2012. http://hdl.handle.net/10012/6564.
Повний текст джерелаGarcia, Sergio Leonardo. "Modeling and analysis of dynamic behavior of hybrid wind-diesel power plants." 2007. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=478837&T=F.
Повний текст джерелаLIN, ZHI-HONG, and 林志鴻. "The dynamic analysis of power systems with pressurized water reactor nuclear plants." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/78616965538465438582.
Повний текст джерелаTorres, Lépez Miguel Andrés. "Dynamic Frequency Control in Diesel-Hybrid Autonomous Power Systems using Virtual Synchronous Machines." Thesis, 2013. http://spectrum.library.concordia.ca/977316/1/Torres_PhD_F2013.pdf.
Повний текст джерелаChang, Hsin-Lung, and 張鑫龍. "Study of the Heat-Pump Innovative Business Model under the Framework of Virtual Power Plants." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/22465630433516780858.
Повний текст джерела國立中興大學
高階經理人碩士在職專班
103
The development of heat pump system and virtual power plant in Taiwan has not yet mature. However, as domestic communities are gradually paying more attention to renewable energy, the framework of virtual power plant will be formed. The good opportunity for the development of heat pump system will be coming soon. In Taiwan, it is very important to explore the issue of how the heat pump system will be developed with the current trend of renewable energy to respond to market changes and adjust related innovative business model and its strategies. The study adopted “Delphi Method” to explore the business model of innovative management of heat pump system under framework of virtual power plant in Taiwan and plan the strategies in response to changes in the market. The author interviewed eight experts and scholars, including two professors from academia, the Secretary-General of Taiwan Heat Pumps Association, and five decision makers in supply chains of heat pump system. Interviewees filled in two rounds of questionnaires and provided professional opinions. According to the result of first-round survey: 1. The development of heat pump system in Taiwan has potential for steady growth, subject to the market niche. In particular, if Taiwan can follow the practice of advanced countries in terms of the innovative management of heat pump system under framework of virtual power plant and consider the development of renewable energy an indispensible part, the heat pump system will have a promising future in Taiwan; 2. The trend of global energy, governmental policy of energy, consumer awareness, and scale of market are key factors which affect the development of heat pump system in Taiwan; 3. It is recommended that the heat pump system in Taiwan develop its own brand to expand the scale of market, manage core technologies, and improve competitiveness; 4. It is feasible to rent the equipment or save the energy expenses to pay the purchase cost of equipment. However, the best way is to take individual clients’ best interest into account and provide different programs and increase customers’ willingness to purchase a heat pump system based on the concept of investment; and 5. It is feasible to consider the heat pump as distributed power under the framework of virtual power plant, combined with the demand response program proposed by the power company in the innovative business model, which focuses on the degree of consumers’ awareness and the attraction to consumers. Due to different professional backgrounds of experts and scholars, the focuses on questions varied. Accordingly, the second round of questionnaire was compiled based on the result of first round and provided for interviewees to choose answers to questions. According to the result of second-round survey: 1. The price is the most important key to the promotion of heat pump system, followed by market visibility, standard of governmental regulations, and subsidies; 2. Sales of heat pump system could be improved by providing after-sale service, reducing the price of heat pump system, and helping clients obtain premium demand response programs; and 3. The reason why consumers resisted the business model of integration of heat pump system and demand response program was that consumers did not understand the actual benefits generated from the heat pump system. Moreover, such business model was so complicated that consumers tended to remain status quo and resist the heat pump system. The study obtained the applicable business model of innovative management of heat pump system under the framework of virtual power plant with a favorable price in the demand response program. In addition, the study also proposed necessary strategies for development of heat pump system in response to gradually popular trend of renewable energy and distributed generation facilities. The core value of heat pump system is that the heat pump is one of renewable energy which is obtained from air, waters, soil in nature as well as a distributed generation facility which can store energy. Since the power supply from renewable energy is not steady, the energy storage system like heat pump is required to serve as an indispensable component during high-proportion power generation of renewable energy. Keywords: Virtual power plant, Heat pump system, Delphi method, Innovative business model, Energy service company, Aggregator, The third party