With increasing offshore wind penetration levels, more secure and flexible offshore electrical transmission systems are needed to ensure security of supply to onshore users. When considering long distances of electrical power transmission, HVDC grids based on the modular multilevel converter (MMC) are a solution for present and future large scale offshore wind integration. As HVDC grids are developing into large and complex systems, dynamic analyses are useful to gain knowledge on the interactions between the different components in the grids. This paper uses the open source tool OpenModelica as modeling environment to demonstrate the potential of the tool in modeling such HVDC systems. A three-terminal HVDC system with offshore wind and energy storage integration is implemented in OpenModelica, and the dynamics of the system are investigated through four simulation cases. The main focus of this paper is dynamics and operation related to the HVDC system. The simulation results show that the MMCs can improve the most rapid power fluctuations using its internal storage capabilities, while an external energy storage system provides a more constant power flow over more extensive periods, in addition to improving the operation of the HVDC system. All models used in this paper are made publicly available to anyone for any purpose, including future studies of larger HVDC grids.

Modeling of multiterminal HVDC offshore grids with renewable energy and storage integration by opensource tools / Espvik, Joachim; Tranulis, Erling Vatn; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta. - (2019), pp. 1-10. ((Intervento presentato al convegno OSES 2019 tenutosi a Brest, France nel 10th-12th July 2019 [10.1109/OSES.2019.8867044].

Modeling of multiterminal HVDC offshore grids with renewable energy and storage integration by opensource tools

Tedeschi, Elisabetta
2019

Abstract

With increasing offshore wind penetration levels, more secure and flexible offshore electrical transmission systems are needed to ensure security of supply to onshore users. When considering long distances of electrical power transmission, HVDC grids based on the modular multilevel converter (MMC) are a solution for present and future large scale offshore wind integration. As HVDC grids are developing into large and complex systems, dynamic analyses are useful to gain knowledge on the interactions between the different components in the grids. This paper uses the open source tool OpenModelica as modeling environment to demonstrate the potential of the tool in modeling such HVDC systems. A three-terminal HVDC system with offshore wind and energy storage integration is implemented in OpenModelica, and the dynamics of the system are investigated through four simulation cases. The main focus of this paper is dynamics and operation related to the HVDC system. The simulation results show that the MMCs can improve the most rapid power fluctuations using its internal storage capabilities, while an external energy storage system provides a more constant power flow over more extensive periods, in addition to improving the operation of the HVDC system. All models used in this paper are made publicly available to anyone for any purpose, including future studies of larger HVDC grids.
2019 Offshore Energy and Storage Summit, OSES 2019
Piscataway, NJ
Institute of Electrical and Electronics Engineers Inc.
978-1-7281-2317-2
978-1-7281-2318-9
Espvik, Joachim; Tranulis, Erling Vatn; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta
Modeling of multiterminal HVDC offshore grids with renewable energy and storage integration by opensource tools / Espvik, Joachim; Tranulis, Erling Vatn; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta. - (2019), pp. 1-10. ((Intervento presentato al convegno OSES 2019 tenutosi a Brest, France nel 10th-12th July 2019 [10.1109/OSES.2019.8867044].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/287505
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