Data logging in power generating stations

The applications of alarm scanning and data logging techniques in the operation of boiler/turbine units in conventional power generating stations are discussed. Consideration is given to the operational requirements with emphasis on the importance of careful selection of the data to be logged. A generalized equipment specification is considered; the problems encountered at the input interface and the methods of dealing with a wide range of different types of input signal are discussed. A description is given of a 200 point alarm scanning and data logging system. An account is given of the practical experience gained as a result of this project.