Phasor Based Voltage Sag Monitoring and Characterisation
Paper i proceeding, 2005

This article addresses a wide three-phase voltage sag characterisation, including sag magnitude, phase-angle jump, and duration. A signal-processing algorithm is proposed to obtain voltage sag characteristics for phase voltages and positive sequence voltage. The proposed methodology is applied to a set of actual measurements obtained from a power quality monitor and from a synchrophasor measurement unit (PMU). Sag characterisation from both data sources are compared, indicating advantages and drawbacks of each device. Results show that data from PQ-monitors permit a more complete disturbance characterisation, however results from data obtained by PMUs are promissory for sag characterisation when the recording frequency of the PMU is increased.

power quality

voltage dips

voltage sags


Roberto Chouhy Leborgne

Chalmers, Energi och miljö, Elkraftteknik

Daniel Karlsson

ABB Sverige AB

ABB Group

Eighteenth International Conference and Exhibition on Electricity Distribution, CIRED 2005, Technical Reports - Session 1: Network Components; Turin; Italy; 6 June 2005 through 9 June 2005

0537-9989 (ISSN)

Vol. 2 2005-11034 271-274


Elektroteknik och elektronik

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