Candidate: Gabriel Linhares Baldo
Program: UFSC / POSMEC
Date: December, 2019
Advisor: Victor Juliano De Negri
Abstract: This master’s thesis presents the design and behavior analysis of a hydraulic solution that incorporates hydrostatic transmission and pitch angle and yaw controls on a horizontal axis wind turbine. The focus is to design a hydraulic solution that can integrate the power control through these three actuation systems and therefore reducing the nacelle weight due to the reduction of the number of components which are installed inside it. Additionally, the system does not require the use of frequency inverter and gearbox, optimizing the cost of the solution. Previous researches developed hydrostatic transmission applied to wind turbines. However, these solutions were only intended to control the power of the wind turbine through the operating condition where there is no need to actuate the pitch angle, requiring the application of another actuation system to perform the displacement of the turbine blades. In addition to pitch angle control, there is also a need for yaw angle control, which requires an actuation system isolated from the transmission system. To achieve a design solution that is able to provide all operating ranges of the wind turbine, this master’s thesis presents an integrated solution that employs hydraulic cylinders for pitch control, hydraulic motor for yaw control and hydrostatic transmission for power regulation of the generator. The designed system was modeled in Amesim® including simultaneous control of the three actuations. The obtained results indicate that the operation in a real wind situation for all operating regions, obtaining a maximum energy efficiency of 85%.
Reference: BALDO, G. Projeto E Análise Comparativa De Soluções Hidráulicas Para Controle De Potência, Yaw E Passo Em Aerogeradores. 2019. 185 p. Dissertação (Mestrado em Engenharia Mecânica). Universidade Federal de Santa Catarina.
