G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 22/00 (2006.01) G01R 21/00 (2006.01) G01R 21/133 (2006.01)
Patent
CA 2299002
Power quality detection, monitoring, reporting, recording and communication in a revenue accuracy electrical power meter is disclosed. Transient events are detected by monitoring the wave shape of the electrical power and comparing deviations to a known threshold. Sags and Swells are detected by computing root mean square value over a rolling window and comparing the computed value with a known threshold. Harmonic frequencies and symmetrical components are quantified by a known algorithm and compared with a known threshold. Incoming waveforms are stored to memory. All recorded and computed data is moved to non-volatile storage via direct memory access transfer in the event that a power quality event jeopardizes the operating power of the meter. Further, the meter provides a power supply utilizing high and low capacitive storage banks to supply sufficient energy to survive short duration power quality events which jeopardize the meter's operating power.
Antoniou Constantine A.
Gunn Colin N.
Jonker Rene T.
Przydatek Piotr B.
Teachman Michael E.
Power Measurement Ltd.
Smart & Biggar
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