Open AccessModelling, 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 , harmonics , controller (irrigation) , engineering , tidal power , electric power system , induction generator , permanent magnet synchronous generator , control theory (sociology) , energy transformation , electronic engineering , power (physics) , computer science , voltage , electrical engineering , control (management) , artificial intelligence , agronomy , physics , quantum mechanics , biology , thermodynamics
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.