Zhang Y.,Nuclear nuclear power operation and Management Co. |
Sheng J.X.,Nuclear nuclear power operation and Management Co. |
Zhang J.F.,Nuclear nuclear power operation and Management Co. |
Jin X.,Nuclear nuclear power operation and Management Co.
Advanced Materials Research | Year: 2014
The main difficulties in controlling Three-phase active power filter (APF) arise from their hybrid nature, and the saturation of nonlinear constraints. A novel approach to the modeling and regulation problem of APF is presented from the combined perspective of switched system and stability of systems with saturation constraints. Firstly, the three-phase APF is built as switched affine system model. Based on the sufficient condition for quadratic stability of convex combination, the common Lyapunov function was selected. Meanwhile, the switched rules are put forward by this function. The paper also discusses the problem of feedback control for the switched systems with saturated nonlinear constraint; and gives a stability condition for switched system under state saturation. Finally, simulation results have good agreement with the theory analysis, and demonstrate the validity of this approach. © (2013) Trans Tech Publications, Switzerland.