Nonlinear Optimal Control for Distributed Power Flow Controller

Abstract

The performance of the distributed power flow controller with traditional linear controller may be deteriorated due to a large-range change of the operating condition. Thus, a new nonlinear power flow control strategy for the distributed power flow controller based on exact linearization via feedback was presented. The 5th-order nonlinear models for the distributed power flow controller both in the shunt side and the series side were fully linearized via selection of the Lyapunov-like output function, the appropriate nonlinear coordinate transformation and the state variable feedback. Then the corresponding nonlinear optimal controller for the distributed power flow controller is designed. The simulation results based on PSCAD/EMTDC simulation platform show that the proposed power flow control strategy for the distributed power flow controller is correct and effective, and also show that the proposed control strategy for the distributed power flow controller has better control effect than the traditional linear control strategy for the distributed power flow controller.