Abstract:
Short-duration RMS voltage variations, namely
sag, swell and interruption, are characterized by the
variations of RMS voltage values and time durations. In this
paper, the quadrature method for calculating RMS voltage
is used to efficiently detect these power quality events. For
comparison, the same power quality events are detected
using conventional RMS calculation methods. Different
voltage events are simulated and the results of the
quadrature and conventional methods are compared. An
experimental real-time monitoring system for voltage events
based on the LabVIEW platform is built, and several
voltage events are tested and evaluated by the developed
setup using quadrature and conventional methods. Both
simulation and experimental results validates the
superiority of the quadrature method for most of the
considered scenarios in terms of accuracy and robustness.
