Breaking News
Design How-To

Novel harmonic analysis method for smart metering

NO RATINGS
Page 1 / 3 Next >
More Related Links
View Comments: Newest First | Oldest First | Threaded View
green_is_now
User Rank
CEO
re: Novel harmonic analysis method for smart metering
green_is_now   6/30/2011 9:06:33 PM
NO RATINGS
This does not make sense to me. Replace highest harmonic content wanted with good accuracy for fundamental frequency then it makes sense. Also frequency does not change quickly in the lines (voltage but the reactive and harmonic does depending on load (current). non multiple sampling not an issue as this will wash out over many cycles. a better way is to use a constant power mask approuach and and only compute the difference form the moving average power calculation and also perhaps only transmit differnce. this will save bandwidth also.

green_is_now
User Rank
CEO
re: Novel harmonic analysis method for smart metering
green_is_now   6/30/2011 7:59:09 PM
NO RATINGS
This does not make sense to me. Replace "highest possible harmonic wanted to be measured with high accuracy" for "fundamental period" and then it makes sense to me. also frequency does not change significantly and thus the sampling frequency to fundamental will not have a varing ratio (or very little). The reactive content due to poor power factor and non linear loads will however (think current).

EREBUS0
User Rank
Rookie
re: Novel harmonic analysis method for smart metering
EREBUS0   6/29/2011 8:23:43 PM
NO RATINGS
An interesting approach, but you might want to look at the work Dr. Peter Raeth did using radial basis functions to model the steady state frequencies using and adaptive model for predicting the energy in real time. His approach greatly reduces the processing requirements and is very responsive to changes. Thanks,

Top Comments of the Week
August Cartoon Caption Winner!
August Cartoon Caption Winner!
"All the King's horses and all the KIng's men gave up on Humpty, so they handed the problem off to Engineering."
5 comments
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Radio
LATEST ARCHIVED BROADCAST
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.
Flash Poll