Modelling, control and frequency domain analysis of a tidal current conversion system with onshore converters | Zendy

Sousounis Marios Charilaos | Zendy; Shek Jonathan K.H. | Zendy; Mueller Markus A. | Zendy

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Modelling, control and frequency domain analysis of a tidal current conversion system with onshore converters

Author(s) -

Sousounis Marios Charilaos,

Shek Jonathan K.H.,

Mueller Markus A.

Publication year - 2016

Publication title -

iet renewable power generation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.005

H-Index - 76

ISSN - 1752-1424

DOI - 10.1049/iet-rpg.2014.0331

Subject(s) - converters , current (fluid) , frequency domain , tidal current , automatic frequency control , control system , computer science , control (management) , control theory (sociology) , environmental science , electronic engineering , engineering , electrical engineering , telecommunications , geology , oceanography , voltage , artificial intelligence , computer vision

To optimise a tidal energy conversion system, the operation, maintenance and power generation aspects have to be taken into account. As a result the key focus of this study is to propose and investigate an alternative method of implementing a tidal energy conversion system using a pitch‐regulated turbine and a variable‐speed squirrel cage induction generator with long distance converters. The generator power output can be optimised by utilising variable‐speed control strategies allowing the system to operate at maximum power coefficient while availability can be increased by reducing the components installed offshore by using long three‐phase cables between the generator and onshore voltage source converters. The tidal current energy conversion system is investigated by developing a full resource‐to‐grid model in MATLAB/SIMULINK and by performing system analysis regarding the effects of harmonics in the long subsea cables. Simulation results show that optimised filter design and the choice of suitable operating frequency for the generator controller can minimise the overvoltages associated with the harmonics and the reflecting voltage waves in the cables.

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