Method for filtering signal for automation of control structure in power plant, involves continuously outputting predefined system time constant and filtered output signal as dead band signal, which corresponds to smoothed input signal

摘要

The method involves examining a noisy input signal in a continuous manner to determine whether an input signal is within or outside of a dead band. A dead band width and a zero point of the dead band are adapted to noise power of the input signal depending on a time period of the input signal. A predefined system time constant and a filtered output signal is continuously outputted as a dead band signal, which corresponds to a smoothed input signal. The band width is increased by a factor when a time of input signal is upward and passed down within a period of time by the dead band. Independent claims are also included for the following: (1) a device for filtering a signal, comprising a signal input (2) a controlling device comprising an input (3) a computer program has a set of instructions for performing a method for filtering a signal (4) a computer program product has a set of instructions for performing a method for filtering a signal.