Candidato: Joel Rapp, Jonatan Turesson
Programa: LiU – UFSC
Data: Agosto de 2015
Orientadores: Petter Krus – LiU, Victor Juliano De Negri – UFSC
Resumo: This master thesis project is a part of a larger project with the goal of developing a drivetrain, utilizing a hydrostatic transmission, for horizontal axis mid-size wind turbines. Some of the benefits from using a hydrostatic transmission are that a variable speed operation is possible without the use of a frequency converter, the generator may be placed on the ground and thus reduce weight in the nacelle and also using hydraulic components can increase lifetime and robustness of the system. The thesis work is a part of the second step towards this goal, which contains constructing a test platform of the concept.
The test platform is being build at the Laboratory of Hydraulic and Pneumatic Systems (LASHIP) in Florianópolis, Brazil, where also the master thesis project has been conducted. Two companies are involved in the construction of the platform, Parker Hannifin and Reivax. Parker Hannifin is a multinational diversified manufacturer of motion and control technologies and systems. Reivax develop technologies for control systems and automation applied in Hydroelectric, Thermoelectric and Nuclear power plants.
The project was performed during the period of February to August 2015 and governs dimensioning and selection of hydraulic components for the test platform, development of simulation model in AMESim, evaluation of control strategies and also a dynamic analysis of the system.
Dimensioning the platform resulted in a drivetrain with an output power of 28 kW. Standard hydraulic components with high efficiencies where selected from Parker’s product portfolio. These components were then modeled in AMESim where simulations of the whole system could be performed. Control strategies were tested and results showed that the best performance is reached when using a regulator that is able to compensate for pressure changes in the system. Results also indicated that the hydrostatic transmission can perform very well as a replacement of frequency converters, in terms of stable frequency output of a variable wind turbine. The dynamic showed that the parameter that sets the main characteristics of the system is the aerodynamic rotor with its large inertia.
Referência: RAPP, J.; TURESSON, J. Hydrostatic Transmission in Wind Turbines – Development of Test Platform. 2015. 164 p. Dissertation (Master Thesis in Fluid Power). Department of Manegement and Engineering, Division of Fluid Power and Mechatronic Systems, Linköping University, Linköping.
