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Journal of Modern Power Systems and Clean Energy

, Volume 5, Issue 4, pp 620–630

First Online: 17 July 2017Received: 23 February 2017Accepted: 12 June 2017

Abstract

This paper proposes an optimized and coordinated model predictive control MPC scheme for doubly-fed induction generators DFIGs with DC-based converter system to improve the efficiency and dynamic performance in DC grids. In this configuration, the stator and rotor of the DFIG are connected to the DC bus via voltage source converters, namely, a rotor side converter RSC and a stator side converter SSC. Optimized trajectories for rotor flux and stator current are proposed to minimize Joule losses of the DFIG, which is particularly advantageous at low and moderate torque. The coordinated MPC scheme is applied to overcome the weaknesses of the field-oriented control technique in the rotor flux-oriented frame, which makes the rotor flux stable and the stator current track its reference closely and quickly. Lastly, simulations and experiments are carried out to validate the feasibility of the control scheme and to analyze the steady-state and dynamic performance of the DFIG.

KeywordsCoordinated model predictive control MPC scheme Doubly-fed induction generator DFIG DC-based converter system Optimized trajectories Rotor side converter RSC Stator side converter SSC CrossCheck date: 1 June 2017

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Author: Shaomin YAN - Aimin ZHANG - Hang ZHANG - Jianhua WANG - Bin CAI

Source: https://link.springer.com/



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