A distributed model predictive control based load frequency control scheme for multi-area interconnected power system using discrete-time Laguerre functions.
This paper proposes a distributed model predictive control based load frequency control (MPC-LFC) scheme to improve control performances in the frequency regulation of power system. In order to reduce the computational burden in the rolling optimization with a sufficiently large prediction horizon, the orthonormal Laguerre functions are utilized to approximate the predicted control trajectory. The closed-loop stability of the proposed MPC scheme is achieved by adding a terminal equality constraint to the online quadratic optimization and taking the cost function as the Lyapunov function. Furthermore, the treatments of some typical constraints in load frequency control have been studied based on the specific Laguerre-based formulations. Simulations have been conducted in two different interconnected power systems to validate the effectiveness of the proposed distributed MPC-LFC as well as its superiority over the comparative methods.
School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China. Electronic address: zhengy1991@foxmail.com.
Yang
Y
Zheng
School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China. Electronic address: jz.zhou@hust.edu.cn.
Jianzhong
J
Zhou
School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
Yanhe
Y
Xu
School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
Yuncheng
Y
Zhang
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430074, PR China.
Zhongdong
Z
Qian
Constraint treatment; Distributed control; Laguerre functions; Load frequency control; Model predictive control