alexa Automatic generation control of a multi area hydrothermal system using reinforced learning neural network controller
Engineering

Engineering

Journal of Electrical & Electronic Systems

Author(s): Lalit Chandra Saikia, S Mishra, Nidul Sinha, J Nanda

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This paper deals with automatic generation control (AGC) of a three unequal area hydrothermal system. Reheat turbines in thermal areas and electric governor in hydro area are considered. Appropriate generation rate constraints are considered in the areas. Bacterial foraging (BF) technique is used to simultaneously optimize the integral gains (KIi) and speed regulation parameter (Ri) keeping frequency bias fixed at frequency response characteristics. The integral controller in this case is termed as BFIC. The performance of a multilayer perception neural network (MLPNN) controller using reinforcement learning is evaluated for the system. In this reinforcement learning, the weights are dynamically adjusted online using backpropagation algorithm with error being the area control error (ACE). The performance of the MLPNN controller is compared with that of BFIC. Also, the performance of MLPNN controller over a wide range of system loading conditions and step load perturbations is compared with BFIC. Investigations clearly reveal the superior performance of MLPNN controller over BFIC. Sensitivity analysis subject to wide changes in system loading, inertia constant (H) and size and location of step load perturbation is carried out to investigate the robustness of the controller with the optimum KIi and Ri obtained at nominal condition.

This article was published in International Journal of Electrical Power & Energy Systems and referenced in Journal of Electrical & Electronic Systems

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