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Power Flow Control of a Doubly-Fed Induction Machine Coupled to a Flywheel
Batlle Arnau, Carles; Dòria Cerezo, Arnau; Ortega, Romeo
Universitat Politècnica de Catalunya. Institut d'Organització i Control de Sistemes Industrials; Universitat Politècnica de Catalunya. ACES - Control Avançat de Sistemes d'Energia
We consider a doubly–fed induction machine controlled through the rotor voltage and connected to a variable local load—that acts as an energy–switching device between a local prime mover (a flywheel) and the electrical power network. The control objective is to optimally regulate the power flow, and this is achieved by commuting between different steady–state regimes. We first show that the zero dynamics of the system is only marginally stable, thus complicating its control via feedback linearization. Instead, we apply the energy–based Interconnection and Damping Assignment Passivity–Based Control technique that does not require stable invertibility. It is shown that the partial differential equation that appears in this method can be circumvented by fixing the desired closed-loop total energy and adding new terms to the interconnection structure. Furthermore, to obtain a globally defined control law we introduce a state–dependent damping term that has the nice interpretation of effectively decoupling the electrical and mechanical parts of the system. This results in a globally convergent controller parameterized by two degrees of freedom, which can be used to implement the power management policy. The controller is simulated and shown to work satisfactorily for various realistic load changes.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Automàtica i control
Passivity-based control
Passivity-based control
Port-hamiltonian models
Doubly–fed induction machine
Power flow control
Control basado en pasividad
Control basat en passivitat
Máquina de inducción doblemente alimentada
Màquina d'inducció doblement alimentada
Control del flujo de potencia
Control del fluxe de potència
Sistemes de control
Classificació INSPEC::Control theory
Artículo
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