Tesis doctoral de Arnau Doria Cerezo
This thesis studies a complex multidomain system, the flywheel energy storage system, including the control objectives specification, modeling, control design, simulation, experimental setup assembling and experimental validation stages. the port interconnection and control of electromechanical systems is studied. The port hamiltonian formalism is presented in general, and particularized for generalized electromechanical systems, including variable structure systems (vss). interconnection and damping assignment-passivity based control (ida-pbc) is a well known technique for port hamiltonian systems (pchs). In this thesis we point out the kind of problems that can appear in the closed-loop structure obtained by ida-pbc methods for relative degree one outputs, when nominal values are used in a system with uncertain parameters. To correct this, we introduce an integral control, which can be cast into the hamiltonian framework. this thesis also presents two new approaches which improve the range of applicability of the ida-pbc technique. first, we show that the standard two-stage procedure used in ida-pbc consisting of splitting the control action into the sum of energy-shaping and damping injection terms is not without loss of generality, and effectively reduces the set of systems that can be stabilized with ida-pbc. To overcome this problem we suggest to carry out simultaneously both stages and refer to this variation of the method as sida-pbc. secondly, we present an improvement of the ida-pbc technique. The ida-pbc method requires the knowledge of the full energy (or hamiltonian) function. This is a problem because, in general, the equilibrium point which is to be regulated depends on uncertain parameters. We show how select the target port-hamiltonian structure so that this dependence is reduced. This new approach allows to improve the robustness for higher relative degree outputs. the flywheel energy storage system consists of a doubly-fed induction mach
Datos académicos de la tesis doctoral «Modeling, simulation and control of doubly-fed induction machine controlled by back-to-back converter«
- Título de la tesis: Modeling, simulation and control of doubly-fed induction machine controlled by back-to-back converter
- Autor: Arnau Doria Cerezo
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 18/10/2006
Dirección y tribunal
- Director de la tesis
- Carles Batlle Arnau
- Tribunal
- Presidente del tribunal: Fossas colet dr. e.
- mario Garcia sanz (vocal)
- ramón Bargallo perpiá (vocal)
- romeo Ortega (vocal)