M2C-based MTDC system for handling of power fluctuations from offshore wind farms

Author

Ahmed, N. ; Haider, Abrar ; Angquist, L. ; Nee, H.-P.

Author_Institution

KTH R. Inst. of Technol., Stockholm, Sweden

fYear

2011

fDate

6-8 Sept. 2011

Firstpage

1

Lastpage

6

Abstract

In this paper a modular multilevel converter (M2C) based multi-terminal direct current (MTDC) system is proposed for the connection of offshore wind farms. Each M2C is modelled with 36 sub-modules per arm with a total of 216 sub-modules consisting of half bridges. An open-loop converter control method is employed for the M2Cs. Power-synchronization control is used instead of a phase-locked loop (PLL) for synchronization. A voltage controller is implemented with power-synchronization control as an inner loop. By means of numerical simulations in PSCAD, it is shown that the system is self stabilizing both at steady state and following power fluctuations of the wind farm.

Keywords

offshore installations; open loop systems; phase locked loops; power control; power convertors; power generation control; power system harmonics; voltage control; wind power plants; MTDC system; modular multilevel converter; multiterminal direct current system; numerical simulations; offshore wind farms; open-loop converter control method; phase-locked loop; power fluctuations; power-synchronization control; voltage controller; Converter Control; Modular Multilevel Converter; Multi-terminal HVDC Transmission; Power Fluctuations; Wind Power Plants;

fLanguage

English

Publisher

iet

Conference_Titel

Renewable Power Generation (RPG 2011), IET Conference on

Conference_Location

Edinburgh

Type

conf

DOI

10.1049/cp.2011.0145

Filename

6136094