Digital signal processing algorithms for power quality assessment

The authors introduce novel digital signal processing algorithms which can be used to measure various power system indicators, which, in turn, may be utilized for power quality assessment. They first discuss the signal analysis problem by providing classification of the assumptions about signal characteristics. Specific characteristics are a consequence of different power system disturbances. Two different classes of digital signal processing algorithms are introduced. These algorithms can be used for measurement of various quantities which may be used to characterize given disturbances. An approach to power quality assessment based on various measurements is illustrated by some examples.