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Multivariable-PI-Based dq Current Control of Voltage Source Converters With Superior Axis Decoupling Capability

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3 Author(s)
Bahrani, B. ; Lab. d''Electron. Ind., Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland ; Kenzelmann, S. ; Rufer, A.

This paper presents a linear direct-quadrature current control strategy for voltage source converters (VSCs) in a rotating reference frame (RRF). The described method is based on multivariable-proportional-integral (PI) regulators and provides fast dynamics and a zero steady-state error. Contrary to the well-known conventional PI-based control strategies in RRFs, the presented method provides practically decoupled axes with a superior disturbance rejection capability. Moreover, its implementation is relatively simple and does not impose excessive structural complexity compared to its conventional PI-based competitors. The method is applicable to both single- and three-phase systems and also to anisotropic three-phase systems, e.g., synchronous motors with different direct and quadrature impedances driven by VSCs. Implementing a three-phase test system, the performance of the presented method is experimentally evaluated.

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 7 )

Date of Publication:

July 2011

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