Robust Tube-Based Model Predictive Control for Wave Energy Converters

Nonlinear Optimal Control for a PMLSG-VSC Wave Energy Conversion Unit

“…Overview of research results on control and optimization of WECS. [1][2][3][4] WECS consists of multi-phase AC generators and voltage source converters [5][6][7][8] Use of AC generators in connection to VSCs for wave energy conversion [9][10][11][12] Models and operation principles of generators and converters in WECS [13][14][15][16] Performance of wave-to-grid configurations of wave energy conversion units [17][18][19][20] Approaches to optimal control and optimized configuration of WECS [21][22][23] Control of converters for synchronizing WECS with the electricity grid [24][25][26][27] Control of power generation and power storage in wave energy conversion [28][29][30][31][32] Control for ensuring uninterrupted and maximized power supply from WECS [33][34][35][36][37] Modeling and control for optimizing power generation from WECS [38][39][40] New methods for nonlinear control of renewable energy systems and WECS The motion of the moving part (mover) of the PMSLG is given by: 𝑀𝑧̈= −𝑏 𝑔 𝑧̇− 𝑏 𝜔 𝑧̇− 𝑘 𝑠 𝑧 + 𝐹 𝑒 + 𝐹 𝑏𝑟 (1) where 𝑏 𝑔 𝑧̇ is the friction force that resists the motion of the moving part of the tubular PMLSG, 𝑏 𝑤...…”

“…Wave energy conversion utilizing Permanent Magnet Linear Synchronous Generators (PMLSGs) and AC/DC Voltage Source Converters (VSCs) enables efficient harnessing of wave energy and the generation of substantial electric power, which can be integrated into the electricity grid [13][14][15][16]. Controlling the motion of such a generator under waveinduced excitation is a non-trivial task that necessitates sophisticated nonlinear control algorithms [17][18][19][20]. Besides, controlling AC/DC voltage source converters to synchronize wave power units with the main electricity grid is a delicate procedure requiring advanced nonlinear control methods [21][22][23].…”