Hi all.
Let me introduce my problem to you, hoping you can give me some useful
directions to solve it. I'm developing my bachelor thesis on a smart THD
sensor for a power distribution line but I'm just new to digital signal
processing and I don't know much about implementing FFTs (or, better,
DFTs)
in c language. I've search extensively through the net but all the
algorithms I've found failed to compile (using MPLAB C30) because of
errors
I really don't know anything of! This is not the real problem, anyway.
My main concern is I don't know exactly what to look for... Here in Europe
the power distribution system works at a fixed frequency of 50 Hz and my
application should be able to detect harmonics of the 50° order,
according
to the specifications of power quality guidelines.
According to Microchip's datasheet, using a DSPIC33 clocked at 120 MHz,
the device is able of 1.1 Msps ADC acquisition, so a 256 points FFT could
detect frequencies up to 19 kHZ if applied to this kind of signal and this
is dramatically low for my application!
Hoping this brief explanation is enough for you to understand my needs,
I'll be looking forward to having directions: articles, books, internet
resources... Help me, I want to get into programming this sensor and I
need
knowledge!
Filippo
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