Browsing NTNU Open by Author "Midtgård, Ole-Morten"
Now showing items 41-58 of 58
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Residential Photovoltaic and Battery Energy System with Grid Support Functionalities
Ranaweera, Iromi; Sanchez Acevedo, Santiago; Midtgård, Ole-Morten (Chapter, 2015)This paper presents the design of a control system for a grid connected residential photovoltaic (PV) system with battery energy storage (BES). The control methods for the power electronic converters are presented and the ... -
A Review of Machine Learning-Based Photovoltaic Output Power Forecasting: Nordic Context
Dimd, Berhane Darsene; Völler, Steve; Cali, Umit; Midtgård, Ole-Morten (Peer reviewed; Journal article, 2022)Motivated by factors such as the reduction in cost and the need for a shift towards achieving UN’s Sustainable Development Goals, PV (Photovoltaic) power generation is getting more attention in the cold regions of the ... -
Short-Term Intermittency of Solar Irradiance in Southern Norway
Ranaweera, Iromi; Midtgård, Ole-Morten; Yordanov, Georgi Hristov (Chapter, 2014)The temporal variability of solar irradiance at small time scales ranging from 1 second to 2 minutes was studied to characterize the short term fluctuations in irradiance at high latitudes. The change in irradiance at time ... -
SiC MOSFETs an Diodes: Characterization, Applications and Low-Inductive Converter Design Considerations
Tiwari, Subhadra (Doctoral theses at NTNU;2019:238, Doctoral thesis, 2019)The future power electronic system trends are: higher efficiency, higher power density, higher operating temperature and lower operation cost of power electronic converters. The emerging wide-bandgap (WBG) semiconductor ... -
SiC MOSFETs for future motor drive applications
Tiwari, Subhadra; Midtgård, Ole-Morten; Undeland, Tore Marvin (Chapter, 2016)This paper investigates the switching performance of six-pack SiC MOSFET and Si IGBT modules for motor drive applications. Both the modules have same packaging and voltage rating (1.2 kV). The three bridge legs of the ... -
SiC MOSFETs for Offshore Wind Applications
Tiwari, Subhadra; Undeland, Tore Marvin; Midtgård, Ole-Morten; Nilsen, Roy (Journal article; Peer reviewed, 2018)Space and weight are critical factors for offshore wind applications during the construction, operation, and maintenance phases. Superior material properties of silicon carbide enable the development of power devices capable ... -
Simulation Model of the Future Nordic Power Grid Considering the Impact of HVDC Links
Aas, Even Strand (Master thesis, 2016)As Europe is shifting to an increasingly larger share of non-dispatchable renewable energy sources, the cross-border power flow changes. This thesis considers further development of an existing PowerFactory simulation model ... -
Single-Phase Bidirectional Power Factor Correction Boost Converter - Performance Evaluation of Totem-Pole PFC Converter Using Wide Band Gap Devices: GaN-HEMT and SiC
Gobena, Kalkidan Amare (Master thesis, 2015)Abstract Several DC loads in data center and telecom industry are fed by power electronic rectifiers. The same rectifiers are used to charge a number of batteries which serve as a backup power source in case of power ... -
Smart Power Control in Supermarket Applications - A Case Study
Person, Håkon (Master thesis, 2017)In this study, smart power control system strategies for Norwegian supermarket applications are investigated. The relevance of smart power control systems is supported by trends in the market and the political environment. ... -
Soft switching loss measurements of a 1.2 kV SiC MOSFET module by both electrical and calorimetric methods for high frequency applications
Tiwari, Subhadra; Langelid, John Kåre; Midtgård, Ole-Morten; Undeland, Tore Marvin (Chapter, 2017)This paper investigates the soft switching performance of a 1.2 kV half-bridge SiC MOSFET module, FCA150XB120 from Sanrex. The selected module has both MOSFET and diode integrated on a single chip. A single pulse control ... -
Solceller som energikilde til tunnelbelysning: Et pilotanlegg
Tengelsen Wanvik, Jørgen (Master thesis, 2014)Masterstudenten har i samarbeid med Statens Vegvesen ved Vegdirektoratet planlagt og prosjektert et nettfrakoblet solcelleanlegg som skal forsyne en tunnel med energi. Hensikten med en slikt pilotanlegg er å danne og samle ... -
Stability and Power Quality Improvements to Facilitate Wide-Scale Deployment of Future Microgrids
Göthner, Fredrik Tomas Bjørndalen Wergeland (Doctoral theses at NTNU;2021:388, Doctoral thesis, 2023)The massive integration of distributed energy resources (DERs) represents a paradigm shift for the traditional power system, which until recently has been dominated by large, centralized power generation units. In addition ... -
Techno-economic Optimum Control of Grid-connected Residential Battery Energy Storage Units
Ranaweera, Iromi; Midtgård, Ole-Morten (Chapter, 2016)A method for cycling residential battery energy storage (BES) units coupled with photovoltaic (PV) systems is presented. The primary purpose of the BES unit is to store the excess energy from the PV system for later ... -
The Performance and Potential for PV systems at Northern Latitudes
Lockertsen, Eirik Oksavik (Master thesis, 2015)What is the performance and potential for PV systems at northern latitudes, is the research question for this thesis. In order to answer this a literature review have been done and a case study of, and visit to, a 236 kWp ... -
Ultra-Short-term Photovoltaic Output Power Forecasting using Deep Learning Algorithms
Dimd, Berhane Darsene; Völler, Steve; Midtgård, Ole-Morten; Zenebe, Tarikua Mekashaw (Peer reviewed; Journal article, 2022)Photovoltaic (PV) is becoming an attractive alternative in Norway in new zero-emission housing projects and in connection with hydropower reservoirs. However, fast-moving clouds result in abrupt changes in PV output power, ... -
Virtual Impedance Design for Power Quality and Harmonic Sharing Improvement in Microgrids
Göthner, Fredrik T. B. W.; Midtgård, Ole-Morten; Torres Olguin, Raymundo E.; Roldan-Pérez, Javier (Chapter; Peer reviewed, 2019)One of the main challenges of decentrally operated islanded microgrids has been proper harmonic sharing for parallel connected inverters. This is largely affected by differences in the feeder impedances of the inverters. ... -
Virtual Impedance Techniques for Power Sharing Control in AC Islanded Microgrids
Holvik, Anders Bergheim (Master thesis, 2018)This thesis focuses on power sharing in low-voltage, islanded ac microgrids. It is motivated by the challenges related to climate change. To achieve a successful integration of renewable energy resources in the power grid, ... -
Voltage support strategies for Overvoltage Prevention of Distributed Solar Inverters in Low-Voltage Networks
Langaard, Jonas Heien (Master thesis, 2016)The increasing penetration of distributed photovoltaic generation in low voltage distribution networks has led to higher risk of overvoltage. This has made it necessary to utilize the capability of the inverter in the ...