METHOD AND ARRANGEMENT FOR DATA ACQUISITION AND REDUCTION IN INTERFERENCE DETERMINATION IN MONITORING SYSTEMS

摘要

The invention relates to a method and an arrangement for data acquisition and compression for off-normal recording in monitoring systems, in which the off-normal signals are sampled as analogue electrical variables, digitised and evaluated. To achieve optimum data compression without restricting the possibilities for reconstruction, the sampling frequency used for digitisation is made dependent on the gradient of the variation of the analogue electrical variable. The invention can be used mainly in determining off-normal values in power supply or transmission systems. IMAGE