MATLAB/SIMULINK MODELING OF A DRIVETRAIN TEST-RIG OF WIND/TIDAL STREAM TURBINES

Anderson Kalkmann¹; Marcus Vinicius Girão de Morais¹; Carlos Santoro¹; Sergio Caetano Alves de Araújo¹

¹ Universidade de Brasília

doi:10.20906/CPS/CILAMCE2015-0305

Resumo

Hydrokinetic turbines use the rivers flow movement for energy. Similar to wind turbines, these machines are made up of rotor, drivetrain and nacelle. Understand the operation of a hydrokinetic turbine is important for the development of such technology. For example, there are vibrations effects from bearings and gears of the drivetrain that are source of disturbances in the energy produced. Then, a test-rig of hydrokinetic drivetrain is a tool to validate the dynamic mechanical models and to investigate influence in energy disturbance. This present work shows a modelling of a wind-hydrokinetic test rig using MATLAB/Simulink. Block models are developed to simulate the dynamic behavior a dynamometer bench composed of shafts, gearboxes, and permanent magnet synchronous generator. Due to gearboxes' efficiency and dissipative torque caused by main bearing, energy dissipation was implemented on numerical model. Once all systems are validated and integrated, some simulations are run to study the test-rig behavior. In time domain, torque and mechanical power are used to verify the model behavior at low speed shaft (LSS) and high speed shaft (HSS). Finally, in frequency domain, we identify natural frequencies of testrig model.

Palavras-chave: MatLab/Simulink; Powertrain; Wind Turbine; System Dynamics