Coordination Control Strategy for Active and Reactive Power of DFIG Based on Exact Feedback Linearization under Grid Fault Condition

Abstract:

In this paper, a control strategy for operation of rotor side converter (RSC) of Doubly Fed Induction Generators (DFIG) is developed by injecting reactive power into the grid in order to support the grid voltage during and after grid fault events. The novel nonlinear control method is based on differential geometry theory, and exact feedback linearization is applied for control system design of DFIG. Then the optimal control for the linearized system is obtained through introducing the linear quadratic regulator (LQR) design method. Simulation results on a single machine infinite bus power system show that the proposed nonlinear control method can inject reactive power to fault grid rapidly, reduce the oscillation of active power and improve the transient stability of power system.

• Periodical: Applied Mechanics and Materials (Volumes 48-49)
• Pages: 335-344
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.48-49.335
• Online since: February 2011
• Authors: Meng Zeng Cheng, Zhen Lan Dou, Xu Cai
• Keywords: Coordination Control, Double Fed Induction Generation (DFIG), Exact Linearization, Grid Fault, Nonlinear System

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