Application of ANN technique based on μ-synthesis gto load frequency control of interconnected power system

A nonlinear artificial neural networks (ANN) controller based on mu-synthesis for solution the load frequency control (LFC) problem is proposed in this paper. Power systems such as other industrial plants subject to some uncertainties and disturbances due to multivariable operating conditions and load changes. In order to take large modeling errors and minimize the effects of area load disturbances, the idea of mu-synthesis theory is being used for training ANN based LFC controller. This newly developed design strategy combines advantage of the ANN and mu-synthesis control techniques to achieve the desired level of robust performance for all admissible uncertainties and leads to a flexible controller with relatively simple structure, which can be useful in the real world complex power system. A two-area power system is considered as a test system to demonstrate the effectiveness of the proposed method in comparison with the conventional PI and p-based robust controllers under various operating conditions and load changes. The simulation results show that the proposed ANN based controller achieves good robust performance even in the presence of generation rate constraints (GRC) and is superior to the other controllers. (C) 2006 Elsevier Ltd. All rights reserved.