Control of Hydrodynamic Parameters of Wave Energy Point Absorbers using Linear Generators and VSC-based Power Converters Connected to the Grid

Abstract

The use of linear generators in offshore wave

energy plants is one of the most promising technologies for

such facilities. The first power converter stage consists of

rectifying the electricity generated by the linear generator.

Lower cost and easy of assembly are the main diode rectifier

advantages, but these devices are not able to control the power

extracted from waves. The use of power converters allows

control over the instantaneous power flow, and in turn enables

both power flow directions. This paper focuses on the control of

the first power conversion stage using Voltage Source

Converters, in order to modify the characteristics of the

hydrodynamic buoy-translator system and thus, optimize the

extracted energy from the waves. Simulation results are

presented showing the features and advantages of the use of

controlled power converters.