Application of rule-based stabilising controller to electrical power system

The paper presents a rule-based stabilising controller for electrical power systems. The proposed rule-based stabiliser is suitable for on-line computer control because heavy calculation is not involved. The control scheme utilised is a modified, time-optimal, bang-bang control scheme. Several rules are prepared to improve the dynamic behaviour of generator. From both the rules and the generator condition, measured at each sampling time, the supplementary stabilising signal is determined and applied to the excitation control loop at each sampling time. There exist several adjustable parameters; these parameters are set to their optimal values by investigating the values of discrete-type, quadratic, performance indices. To investigate the efficiency of the proposed rule-based stabiliser, several simulations were performed. Very good system performance was obtained by applying the rule-based stabiliser throughout all the simulations. The implementation of the stabiliser may be easy because of its simple control rules and required data.