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Modeling and control of offshore AC hub

Hu, Xiaobo, Liang, Jun and Dominguez-Garcia, Jose Luis 2016. Modeling and control of offshore AC hub. In: Van Hertem, Dirk, Gomiss-Bellmunt, Oriol and Liang, Jun eds. HVDC Grids: For Offshore and Supergrid of the Future, IEEE Press Series on Power Engineering, Wiley, pp. 451-471. (10.1002/9781119115243.ch22)

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Abstract

High-voltage direct current (HVDC) grid technology is one technical solution that allows the connection of multiple offshore wind farms to one or more onshore connection points. However, there are a number of technical issues and challenges to be overcome in the construction of HVDC grids. This chapter introduces the AC hub concept and develops different economic functions to evaluate the frequency-cost dependence of AC hub components. It then investigates the control strategy need to operate the system at variable frequency. A standard frequency, 50 Hz or 60 Hz, can be used in an AC hub like an ordinary AC system. The voltage and frequency of an AC hub are established by the voltage-source converters (VSCs) of HVDC links. The AC hub without DC circuit breakers can maintain stability by rescheduling the power through variable frequency operation and reduction of wind power generation through frequency-responsive power reduction control.

Item Type: Book Section
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: AC hub; DC circuit breakers; High-voltage direct current; Offshore wind farms; Voltage-source converters; Wind power generation
Publisher: Wiley
ISBN: 9781118859155
Funders: FP7-PEOPLE-2012-ITN
Last Modified: 04 Jun 2017 09:13
URI: http://orca.cf.ac.uk/id/eprint/92154

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