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Temiz, Irina
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Publications (10 of 25) Show all publications
Parwal, A., Fregelius, M., Leijon, J., Chatzigiannakou, M. A., Svensson, O., Strömstedt, E., . . . Leijon, M. (2019). Grid Integration and a Power Quality Assessment of a Wave Energy Park. IET Smart Grid, 1-14
Open this publication in new window or tab >>Grid Integration and a Power Quality Assessment of a Wave Energy Park
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2019 (English)In: IET Smart Grid, ISSN 2515-2947, p. 1-14Article in journal (Refereed) Published
Abstract [en]

This paper presents a step towards the grid connection of a wave energy park through an electric power conversion system(EPCS)developed and installed for the wave energy harvesting in Lysekil, Sweden.TheEPCScomprises ofa rectifier,aDC-bus,andan inverterfollowedbyaharmonic filter. The higher and lowerorder harmonics injected bythe inverterin a power quality contextare investigated. The lowerorder voltage harmonics partially distort the voltage sourceinverter(VSI)outputgridcurrent.Aphase-lockedloop(PLL)basedgridphasetrackingisusedtoattenuatethelowerorder harmonicsbyreflectingthegridharmonicsintheinverteroutput.Anexpressionforthegridcurrentharmonicsasafunctionofthe gridvoltageharmonicshasbeenderived and implemented. AmathematicalmodelisderivedtoobtainatransferfunctionforthePLLand finally,PI-gainsaretunedforastablesystemoperation.Aharmonicfilterfor mitigatingthehigherorderharmonicshas beenimplemented. The total harmonic distortion (THD) is evaluated experimentally and theresults fulfill the gridcoderequirementsat various frequencies and harmonic orders.

Place, publisher, year, edition, pages
UK: , 2019
Keywords
WAVE ENERGY SMART GRID HARMONIC DISTORTION
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
urn:nbn:se:uu:diva-389779 (URN)10.1049/iet-stg.2019.0009 (DOI)
Funder
Swedish Research Council, 2015-03126
Available from: 2019-07-25 Created: 2019-07-25 Last updated: 2019-08-19
Anttila, S., Silva, D., Temiz, I., Oliveira, J. G., Leijon, J., Parwal, A. & Boström, C. (2019). Power Control Strategies for a Smoother Power Output from a Wave Power Plant. In: 13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019: . Paper presented at European Wave and Tidal Energy Conference (EWTEC). Napoli, Italy: European Wave and Tidal Energy Conference
Open this publication in new window or tab >>Power Control Strategies for a Smoother Power Output from a Wave Power Plant
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2019 (English)In: 13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019, Napoli, Italy: European Wave and Tidal Energy Conference , 2019Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Napoli, Italy: European Wave and Tidal Energy Conference, 2019
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-390134 (URN)
Conference
European Wave and Tidal Energy Conference (EWTEC)
Available from: 2019-08-05 Created: 2019-08-05 Last updated: 2019-08-19
Potapenko, T., Parwal, A., Kelly, J., Hjalmarsson, J., Anttila, S., Boström, C. & Temiz, I. (2019). Power Hardware in-the-Loop Real Time Modelling using Hydrodynamic Model of a Wave Energy Converter with Linear generator Power Take-Off. In: the 29th International Ocean and Polar Engineering Conference (ISOPE), Honolulu, Hawaii, USA, June 16-21, 2019: . Paper presented at 29th International Ocean and Polar Engineering Conference (ISOPE).
Open this publication in new window or tab >>Power Hardware in-the-Loop Real Time Modelling using Hydrodynamic Model of a Wave Energy Converter with Linear generator Power Take-Off
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2019 (English)In: the 29th International Ocean and Polar Engineering Conference (ISOPE), Honolulu, Hawaii, USA, June 16-21, 2019, 2019Conference paper, Oral presentation with published abstract (Refereed)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-390101 (URN)
Conference
29th International Ocean and Polar Engineering Conference (ISOPE)
Available from: 2019-08-05 Created: 2019-08-05 Last updated: 2019-08-19
Temiz, I., Parwal, A., Kelly, J., Potapenko, T., Leijon, J., Sara, A., . . . Boström, C. (2019). Power Hardware-in-the-loop simulations of Grid-Integration of a Wave Power Park. In: 13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019: . Paper presented at 13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019. Napoli, Italy
Open this publication in new window or tab >>Power Hardware-in-the-loop simulations of Grid-Integration of a Wave Power Park
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2019 (English)In: 13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019, Napoli, Italy, 2019Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Napoli, Italy: , 2019
Keywords
energy storage system, grid integration, hardware-in-the-loop, microgrid, power fluctuations, wave energy converter
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-390104 (URN)
Conference
13th European Wave and Tidal Energy Conference (EWTEC), Napoli, Italy, September 1-6, 2019
Available from: 2019-08-05 Created: 2019-08-05 Last updated: 2019-08-19
Parwal, A., Fregelius, M., Cardosa Silva, D., Potapenko, T., Hjalmarsson, J., Kelly, J., . . . Leijon, M. (2019). Virtual Synchronous Generator Based Current Synchronous Detection Scheme for a Virtual Inertia Emulation in SmartGrids. Energy and Power Engineering, 11(3), 99-131
Open this publication in new window or tab >>Virtual Synchronous Generator Based Current Synchronous Detection Scheme for a Virtual Inertia Emulation in SmartGrids
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2019 (English)In: Energy and Power Engineering, ISSN 1949-243X, E-ISSN 1947-3818, Vol. 11, no 3, p. 99-131Article in journal (Refereed) Published
Abstract [en]

Renewable energy sources, such as photovoltaicwind turbines, and wave power converters, use power converters to connect to the grid which causes a loss in rotational inertia. The attempt to meet the increasing energy demand means that the interest for the integration of renewable energy sources in the existing power system is growing, but such integration poses challenges to the operating stability. Power converters play a major role in the evolution of power system towards SmartGrids, by regulating as virtual synchronous ge-nerators. The concept of virtual synchronous generators requires an energy storage system with power converters to emulate virtual inertia similar to the dynamics of traditional synchronous generators. In this paper, a dynamic droop control for the estimation of fundamental reference sources is imple-mented in the control loop of the converter, including active and reactive power components acting as a mechanical input to the virtual synchronous generator and the virtual excitation controller. An inertia coefficient and a droop coefficient are implemented in the control loop. The proposed con-troller uses a current synchronous detection scheme to emulate a virtual iner-tia from the virtual synchronous generators. In this study, a wave energy converter as the power source is used and a power management of virtual synchronous generators to control the frequency deviation and the terminal voltage is implemented. The dynamic control scheme based on a current synchronous detection scheme is presented in detail with a power manage-ment control. Finally, we carried out numerical simulations and verified the scheme through the experimental results in a microgrid structure.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2019
Keywords
Dynamic Droop Control, Energy Storage, Virtual Inertia, Virtual Synchronous Generator
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
urn:nbn:se:uu:diva-379215 (URN)10.4236/epe.2019.113007 (DOI)
Funder
Swedish Research Council, 2015-03126StandUp
Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-08-19Bibliographically approved
Remouit, F., Chatzigiannakou, M.-A., Bender, A., Temiz, I., Sundberg, J. & Engström, J. (2018). Deployment and Maintenance of Wave Energy Converters at the Lysekil Research Site: A Comparative Study on the Use of Divers and Remotely-Operated Vehicles. Journal of Marine Science and Engineering, 6(2), Article ID 39.
Open this publication in new window or tab >>Deployment and Maintenance of Wave Energy Converters at the Lysekil Research Site: A Comparative Study on the Use of Divers and Remotely-Operated Vehicles
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2018 (English)In: Journal of Marine Science and Engineering, E-ISSN 2077-1312, Vol. 6, no 2, article id 39Article in journal (Refereed) Published
Abstract [en]

Ocean renewable technologies have been rapidly developing over the past years. However, current high installation, operation, maintenance, and decommissioning costs are hindering these offshore technologies to reach a commercialization stage. In this paper we focus on the use of divers and remotely-operated vehicles during the installation and monitoring phase of wave energy converters. Methods and results are based on the wave energy converter system developed by Uppsala University, and our experience in offshore deployments obtained during the past eleven years. The complexity of underwater operations, carried out by either divers or remotely-operated vehicles, is emphasized. Three methods for the deployment of wave energy converters are economically and technically analyzed and compared: one using divers alone, a fully-automated approach using remotely-operated vehicles, and an intermediate approach, involving both divers and underwater vehicles. The monitoring of wave energy converters by robots is also studied, both in terms of costs and technical challenges. The results show that choosing an autonomous deployment method is more advantageous than a diver-assisted method in terms of operational time, but that numerous factors prevent the wide application of robotized operations. Technical solutions are presented to enable the use of remotely-operated vehicles instead of divers in ocean renewable technology operations. Economically, it is more efficient to use divers than autonomous vehicles for the deployment of six or fewer wave energy converters. From seven devices, remotely-operated vehicles become advantageous.

National Category
Marine Engineering
Identifiers
urn:nbn:se:uu:diva-348816 (URN)10.3390/jmse6020039 (DOI)000436558500011 ()
Funder
StandUpEU, FP7, Seventh Framework Programme, 607656Swedish Energy Agency
Available from: 2018-04-17 Created: 2018-04-17 Last updated: 2019-04-01Bibliographically approved
Temiz, I., Leijon, J., Ekergård, B. & Boström, C. (2018). Economic aspects of latching control for a wave energy converter with a direct drive linear generator power take-off. Renewable energy, 128(Part A), 57-67
Open this publication in new window or tab >>Economic aspects of latching control for a wave energy converter with a direct drive linear generator power take-off
2018 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 128, no Part A, p. 57-67Article in journal (Refereed) Published
Abstract [en]

A wave energy converter (WEC) should be controlled in order to increase the average output power. In this paper, economic aspects of latching applied to a point absorbing WEC with a linear generator power take-off (PTO) are discussed. The capacity utilisation factor (CUF) is suggested to be used along with average absorbed power for control optimisation. Optimum and suboptimum latching controls are assessed for the WEC and compared with a constant damping PTO force control. The WEC performance is simulated using monochromatic waves for the wave conditions of the Wave Hub test site, UK. The linear wave theory is used in a hydro-mechanical two-body simulation model. It is shown that the latching controls possess considerable practical challenges significantly increasing the return of investment time periods.

National Category
Marine Engineering
Identifiers
urn:nbn:se:uu:diva-351461 (URN)10.1016/j.renene.2018.05.041 (DOI)000437079600006 ()
Funder
Swedish Research Council, 2015-03126Swedish Energy AgencyStandUpÅForsk (Ångpanneföreningen's Foundation for Research and Development), 17-550
Available from: 2018-05-25 Created: 2018-05-25 Last updated: 2019-03-04Bibliographically approved
Parwal, A., Fregelius, M., Temiz, I., Göteman, M., Oliveira, J. G., Boström, C. & Leijon, M. (2018). Energy management for a grid-connected wave energy park through a hybrid energy storage system. Applied Energy, 231, 399-411
Open this publication in new window or tab >>Energy management for a grid-connected wave energy park through a hybrid energy storage system
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 231, p. 399-411Article in journal (Refereed) Published
Abstract [en]

The concern for climate change and energy consumption has increased the demand for renewable energy production considerably. Marine energy sources attract attention because of their high energy density. Wave energy is an attractive renewable energy source with large potential. Due to the nature of the ocean waves, a linear wave energy converter generates intermittent power. It is therefore crucial to regularize the power before connecting to the grid. Energy storage systems present effective ways to minimize the power fluctuations and deliver a steady power to the grid. In this paper, we present an energy management control system with a dynamic rate limiter. The method is applied to control a hybrid energy storage system, combining battery and supercapacitor, with a fully active topology controlled by the power converters. The results show that the method is able to control the charging and discharging states of the battery and the supercapacitor, and minimize the power fluctuation to the grid. The algorithm ensures low losses by shifting the required power and the stored power smoothly over the energy storage system.

Keywords
Wave energy converter, Hybrid energy storage system, Energy management control system, Dynamic rate limiter, State of charge
National Category
Energy Systems
Identifiers
urn:nbn:se:uu:diva-361207 (URN)10.1016/j.apenergy.2018.09.146 (DOI)000452345400030 ()
Funder
StandUpSwedish Research Council, 2015-03126Carl Tryggers foundation
Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2019-08-19Bibliographically approved
Parwal, A., Fregelius, M., Leijon, J., Chatzigiannakou, M., Svensson, O., Temiz, I., . . . Leijon, M. (2018). Experimental Test of Grid Connected VSC to Improve the Power Quality in a Wave Power System. In: 2018 5TH INTERNATIONAL CONFERENCE ON ELECTRIC POWER AND ENERGY CONVERSION SYSTEMS (EPECS).: . Paper presented at 5th International Conference on Electric Power and Energy Conversion Systems (EPECS), APR 23-25, 2018, Kitakyushu, JAPAN..
Open this publication in new window or tab >>Experimental Test of Grid Connected VSC to Improve the Power Quality in a Wave Power System
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2018 (English)In: 2018 5TH INTERNATIONAL CONFERENCE ON ELECTRIC POWER AND ENERGY CONVERSION SYSTEMS (EPECS)., 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper provides an overview of electric power conversion system installed at the Lysekil research site, located at the west coast of Sweden. The electric power conversion system consists of rectifiers, rectifying the power from the wave energy converters, a DC-link and a grid-tied inverter. The paper focuses on the performance of the inverter and the filter and presents experimental results obtained during the grid integration.

Series
International Conference on Electric Power and Energy Conversion Systems, ISSN 2325-2677
Keywords
wave energy converter (WEC), wave energy havesting, grid integration, LCL filter response
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-373349 (URN)10.1109/EPECS.2018.8443488 (DOI)000450072100010 ()978-1-5386-6457-5 (ISBN)
Conference
5th International Conference on Electric Power and Energy Conversion Systems (EPECS), APR 23-25, 2018, Kitakyushu, JAPAN.
Funder
Swedish Research Council, 2015-03126Swedish Energy AgencyStandUp
Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2019-01-22Bibliographically approved
Parwal, A., Fregelius, M., Leijon, J., Chatzigiannakou, M. A., Svensson, O., Temiz, I., . . . Leijon, M. (2018). Experimental Test of Grid Connected VSC to Improve the Power Quality in a Wave Power System. In: : . Paper presented at Fifth International Conference on Electric Power and Energy Conversion Systems (EPECS 2018), Kitakyushu, Japan : April 23-25, 2018.
Open this publication in new window or tab >>Experimental Test of Grid Connected VSC to Improve the Power Quality in a Wave Power System
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Meteorology and Atmospheric Sciences
Identifiers
urn:nbn:se:uu:diva-361208 (URN)
Conference
Fifth International Conference on Electric Power and Energy Conversion Systems (EPECS 2018), Kitakyushu, Japan : April 23-25, 2018
Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2019-08-19Bibliographically approved
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