Automatic generation control of interconnected power systems using variable-structure controllers

The paper presents a new technique for the automatic generation control of interconnected power systems. The proposed technique is devoloped for designing the controllers, using the theory of variable-structure systems. A special feature of the variable-structure controllers is that they can greatly improve the transient performance of the system, while keeping the steady-state error at zero. In addition, when the variable-structure system is operated in the so-called sliding mode, the system response becomes insensitive to changes in the plant parameters. Results, obtained from a comparison study by digital simulations, show that variable-structure controllers can offer the control designer new possibilities for improving the quality of control for automatic generation control of interconnected power systems