Power quality issues in electrical power distribution systems

Abstract

The paper intends to present some voltage power quality issues in low-voltage electrical power distribution systems. In the introductory part, some of the main specific events are addressed, namely sags, swells, transients, and harmonics. The following section is dedicated to the monitoring process. The power quality analyzer used is briefly presented, respectively the Dranetz-BMI PowerXplorer PX5. The third section is devoted to the measurements performed at the secondary busbars of a transformer substation. Finally, the conclusions reveal the importance of a rigorous power quality survey and also some of the drawbacks of the power quality standard EN 50160.