Method and apparatus for line power monitoring for...

Details Method and apparatus for line power monitoring for... Method and apparatus for line power monitoring for...

H - Electricity

02

J

348/17, 323/5, 3

H02J 9/06 (2006.01) H02H 3/24 (2006.01) H02H 3/50 (2006.01)

Patent

CA 2024488

AC line monitoring is provided for uninterruptible power supplies to detect AC power system line faults by comparing the presently received cycle of the AC power line signal with a reference waveform. The reference waveform is formed of a composite of waveforms from prior cycles which adapts over time to the shape of the AC power line waveform, so that waveforms other than pure sinusoids can be accepted without triggering false fault conditions. The composite reference waveform may be formed of essentially all samples from prior cycles with exponentially decaying weighting. An excessive deviation of the current waveform from the reference waveform results in a fault being detected which causes switching of the uninterrupible power supply to provide backup power. The RMS value of the power line voltage is also estimated on a substantially real time basis, preferably by calculating the RMS value of the reference waveform, to provide a fault condition signal when the estimated RMS value falls below a selected level, which also can be utilized to cause switching of the uninterruptible power supply.

Affiliated with

Also associated with

Rating

Method and apparatus for line power monitoring for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for line power monitoring for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for line power monitoring for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1787435