Symmetric DQ Control of Saturated Salient AC Machines - Utilizing Targeted Time Constant Virtual Resistance and Complex Vector Flux-Linkage Regulation
| Autor: | Yochan Son, Dwarakanath V. Simili, Caleb W. Secrest |
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| Rok vydání: | 2020 |
| Předmět: |
Operating point
Current (mathematics) Computer science 05 social sciences Time constant Regulator Flux 020207 software engineering 02 engineering and technology Linkage (mechanical) Flux linkage law.invention Control theory law 0202 electrical engineering electronic engineering information engineering 0501 psychology and cognitive sciences 050107 human factors Voltage |
| Zdroj: | 2020 IEEE Energy Conversion Congress and Exposition (ECCE). |
| Popis: | This paper presents a high-performance discretetime current and flux-linkage regulator for control of salient (i.e., asymmetric) AC machines. First, a linearized operating point model of an asymmetric AC machine is presented. Then, the operating point model is used to derived closed-form solutions for the virtual damping resistances required to modify the asymmetric plant of the AC machine to be virtually equivalent to that of a symmetric machine. Next, the obtained virtual damping resistances are paired with a symmetric complex vector style flux-linkage regulator for closed-loop control of current and flux- linkage. Finally, an intuitive flux-weakening regulator is proposed to ensure controlled operation of the flux-linkage regulator at the voltage limits of the system. When compared to existing current regulators for asymmetric AC machines, the regulator developed in this paper: 1) is less parameter sensitive, 2) has improved dynamic stiffness properties, 3) is easier to implement and tune, 4) is well-suited for all levels of machine saturation, 5) is well-suited for low sampling-to-fundamental frequency ratios, and 6) lends itself to complex vector and discrete-domain analysis. |
| Databáze: | OpenAIRE |
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