Advanced System for Power Quality Monitoring

In this article, using the Lab Viewgraphical programming environment, three voltage transducers, three current transducers and a data acquisition module an advanced system for monitoring the power quality of electricity is implemented. The acquisition of instantaneous values for currents and voltages allows the proposed system to calculate several parameters that characterize the power quality (level components with the root mean square values of measured harmonics, average Fast Fourier Transform, THD factor, deforming residue, distortion factor, unbalanced voltages/currents and so on). All of these parameters can be monitored and recorded within a time frame set by the system user. Thus, by combining the functions of meter, portable oscilloscope and recorder, this advanced system should be configured for the essential tests required to monitor power quality to ensure energy efficiency and performance at any point of supply network to an industrial consumer and not only.