Search results for "VDP::Teknologi: 500::Elektrotekniske fag: 540::Elkraft: 542"
showing 10 items of 38 documents
Control strategy based on wavelet transform and neural network for hybrid power system
2013
Published version of an article in the journal: Journal of Applied Mathematics. Also available from the publisher at: http://dx.doi.org/10.1155/2013/375840 Open Access This paper deals with an energy management of a hybrid power generation system. The proposed control strategy for the energy management is based on the combination of wavelet transform and neural network arithmetic. The hybrid system in this paper consists of an emulated wind turbine generator, PV panels, DC and AC loads, lithium ion battery, and super capacitor, which are all connected on a DC bus with unified DC voltage. The control strategy is responsible for compensating the difference between the generated power from the…
Design of Photovoltaic System for Rural Electrification in Rwanda
2017
Master's thesis Renewable Energy ENE500 - University of Agder 2017 In this century of accelerated development in various domains, some African countries are still facing a challenge of lack of power due to its scarce in some places, where by the main source of power (generation of electricity) is hydro since thermal and fuel are still on a small scale. This problem results in less productivity and economic decline of some countries like Rwanda which is among African countries that are at a very high speed in development, the grid lines from distant places are stack and they are few compared to the need of electricity in all corners of the country, especially in rural areas whereby each hous…
Resilience in Critical infrastructure within the energy sector of Norway
2021
Master's thesis in Cyber security (IS507) This thesis investigates what are the characteristics of resilience within the energy sector, as well as what are the "best” known practices being used to increase awareness of the employees. By looking at the existing literature and finding differences between how the energy sector in Norway vs other nations approaches resilience. There is a difference in Norway's more decentralized power grid, where many smaller power stations supply energy, compared to other nation with single large power station. This influences how they will approach resilience. The study uses a qualitative research approach, with semi-structured interviews to gather data from …
Home Energy Management System Under Power Pricing and Grid Tariffs : Controlling energy consumption for a household using EMS, power prices, and grid…
2020
Master's thesis in Renewable energy (ENE500)
The development of a market for Demand Side Flexibility: A study of the pilot project NorFlex
2021
Master's thesis in Industrial economics and technology management (IND590) Demand side flexibility (DSF) is believed to have positive value for the power system. DSF could solve the problems the power grid is facing due to increased electricity consumption and increased production from intermittent renewable energy sources. This is done by enabling de-mand side participation in the value chain. NorFlex is a pilot project testing and validating the DSF value chain. This thesis follows the NorFlex project, analyzing the potential value gain of DSF. The following problem statement is answered: In a developing market for Demand Side Flexibility, what is the potential for value gain? The researc…
Tiltak for håndtering av spenningsavvik : Kan fleksibilitet løse problemet?
2021
Master's thesis in Industrial economics and technology management (IND590) Økt effektuttak, elektrifisering og mer uregulerbar energiproduksjon fører til utfordringer med dårlig spenningskvalitet i kraftnettet. Når flere bruker mer strøm samtidig, kan dette gå utover spenningskvaliteten hos kunden. Dersom en kunde klager på dårlig spenningskvalitet og problemet skyldes spenningsavvik i nettselskapets anlegg, er nettselskapet pliktig etter loven å utbedre dette. Vanligvis blir dette utbedret ved å bygge nett dersom ingen andre virkemidler er gode nok. Dette er kostbare investeringer for et nettselskap, som også vil gjenspeile seg veden høyere nettleie hos kunden. I denne sammenheng er det in…
Effekten av å døgnregulere Eidselva
2018
Masteroppgave industriell økonomi og teknologiledelse IND590 - Universitetet i Agder 2018 I denne casestudien er lønnsemda og gjennomføringsevna av å døgnregulere Eidselva vurdert. Initiativtakar til problemstillinga er Statkraft, som er eigar av det øvste kraftverket i Eidselva, Hogga kraftverk. Nedstraums Hogga ligger Vrangfoss, Eidsfoss og Ulefoss kraftverk, desse har andre eigarar som får kraftinntektene. Statkraft ynskjer å adressere moglegheitene for og effekten av at kraftverka går frå dagens produksjonsmaksimering til profittmaksimering. Der sistnemnde er optimalisert produksjon i samråd med kraftprisen, altså døgnregulering. Oppgåva har adressert ein netto positiv nominell kontants…
Forbrukerfleksibilitet: Et alternativ til nettinvesteringer? : En analyse av potensialet for forbrukerfleksibilitet for Agder Energi Nett
2018
Masteroppgave industriell økonomi og teknologiledelse IND590 - Universitetet i Agder 2018 Strømnettet må dimensjoneres etter de største effekttoppene i året, som typisk er på juleaften, når alle lager middag samtidig, eller på årets kaldeste dag, da alle varmeovner står på. Dette betyr at strømnettet i alle andre perioder har ledig kapasitet. For å sikre en mer effektiv utnyttelse av det eksisterende strømnettet, må disse effekttoppene reduseres og jevnes ut. Et tiltak for å oppnå dette er forbrukerfleksibilitet. I begrepet forbrukerfleksibilitet inngår både endringer i kundeadferd som følge av prissignaler, og fjernstyrte utkoblinger av forbrukslaster. Å redusere eller unngå å forsterke st…
Power Quality Analysis of Offshore Wind Farms : Evaluating how different turbulence spectra will affect the power quality from offshore windsfarms us…
2020
Master's thesis in Renewable energy (ENE500)
Fremtidig systemjording av regionalnettet i Agder
2018
Masteroppgave fornybar energi ENE500 - Universitetet i Agder 2018 System earthing describes how the neutral of a transformer is connected to ground. If a ground fault occurs, the system earthing is to detect and manage the fault current in such a way that it does not inflict damage on humans or the grid. An increasing fault current in compensated earthed networks have recently started to cause concerns in the Norwegian regional grid. Grid expansions, upgrades in operating voltage and increased amount of cables are factors that have made the fault current rise in many parts of the regional grid. Due to this, a review of possible system earthing designs has been desired, to insure a future-or…