Abstract :
A power system is always subject to unforeseen disturbances of different kinds with a wide spectrum ranging from small kicks in voltages or frequency up to hazardous accidents leading to partial or even complete blackouts. Undoubtly, identification of such disturbances with the appropriate speed; e.g. on real time base, will contribute; to a great extent, in minimization of events leading to blackouts. The subject paper presents a conceptional scheme for on line analysis or diagosis for disturbances to identify their types and hence to take the appropriate measures. The presented scheme, for which the author proposes the designation CADDC (Computer-aided disturbance diagnosis and control) performs the following functions :- - Collection of essential information pertaining to pre-and-post-disturbance conditions from local loggers in plants (or substations). - Processing these informations locally by the help of built-in microprocessor chips. - Plant´s (or S/S) processed information are transmitted to the central dispatch data processor for further analysis, identificatren, and generation of the appropriate output, and control command signals. Diagnosis, and hence control processes depend mainly upon :- - Directing questions about disturbances and receiving answers in binary forms of Yes/No. - Formation of a logical scale for the investigated disturbance, and comparison with well defined types of disturbances, and hence take the appropriate measure.
