Community Research and Development Information Service - CORDIS

Analysing power quality in three-phase systems

A newly developed power-meter offers accurate measurements of electrical quantities that are related to power quality aspects. The device may be used to provide effective control and increased protection of power systems.
Analysing power quality in three-phase systems
The power-meter comprises voltage and current transducers as well as suitable hardware and software elements for data acquisition and analysis on a PC. This innovation is an on-line operating device that allows the collection and analysis of several electrical quantities defined in three-phase systems.

These include equivalent Root-Mean-Square (RMS) voltage and current values as a function of phase voltages and line currents respectively, under non-sinusoidal conditions. Other measurements involve distortion parameters, unbalance and fundamental-power factors as well as apparent, active and reactive power. Measurement of these electrical quantities allows monitoring of power quality and provides an effective means for assessing utilisation of utilities and power consumption.

For systems with non-sinusoidal waveforms and unbalanced loads, the international scientific Institute of Electrical and Electronic Engineers (IEEE) has already proposed these equivalent measures for formulation. Unlike similar commercially available meters, this power-meter offers measures of three individual voltages or individual currents without considering separated phase voltages and line currents.

The novel power-meter features flexible design within accuracy and measurement requirements and low cost. Collaboration is sought with partners working with instrumentation and measurement of electrical quantities such as manufacturers of electronic instrumentation and with laboratories active in standardisation.
Record Number: 81740 / Last updated on: 2005-09-18
Domain: Industrial Technologies