Power Quality

We offer calibrations of power quality parameters, such as voltage and current harmonics and flicker. By calibrating your meters and measurement systems, you will get a higher quality of your measurements and reduce the costs associated with poor quality.
Various parameters determine the quality of electricity

Power quality is a summary concept to describe the quality of the power delivery. A number of parameters are used such as voltage levels, distortion, transients and so on. Meters used are often called power analyzers or power quality meters. It is often non-perfect loads that causes power quality issues but it can also be lightning and power network coupling events. Both the number of sensitive components and the number of “bad loads” have increased during the last decades and the number of parties involved in the power delivery has also increased.

Harmonics affect power quality

Instruments for voltage-, current, power and energy measurements are often used under non-ideal conditions. Yet they are most often calibrated for ideal sinusoidal voltages and currents. The reason is partly tradition but also because of the considerable complexity of measurements under non-sinusoidal conditions.

RISE offers calibration of the voltage, current and power and harmonics at non-sinusoidal conditions.

The demand for measuring instruments coping with these new tougher conditions and with the ability to measure power quality parameters has dramatically increased. In many situations e.g in connection with quality assurance, contracts or conflicts it is necessary to use calibrated measuring instruments.

Reference Instrument

For calibration, a reference instrument is needed that is capable of verifying the instrument also under non-sinusoidal conditions. Based upon digital sampling technique RISE has built a reference instrument that can be used to calibrate instruments measuring voltage and current harmonics and THD (total harmonic distortion) as well as active power, reactive power, apparent power and power factor.

RISE reference system has a determined, traceable, measuring uncertainty within ± 150 ppm in most situations, even better in sinusoidal situations. Because of this work we can now offer calibration of even the most accurate meters on the market, regarding harmonics, distortion and flicker.
 

 

Related Information

Contact Persons

Stefan Svensson

Phone: +46 10 516 54 15

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail info@ri.se

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