I am trying to calculate short and long term flicker using my VI, image attached.
The values, Pst and Plt, are always zero and I don't know why.
I am reading the data that the scope acquired from a file. It consists of time and amplitude.
Does anyone see anything, or many things, that I am doing wrong?
The Power Quality measurement VIs do not accept raw data input. You should resample the raw data first.
Please refer to the examples at:
C:\Program Files (x86)\National Instruments\LabVIEW 2017\examples\Electrical Power\Power Quality\Applications (DAQmx)\Flicker Measurement (DAQmx).vi
cRIO based example:
X:\Program Files (x86)\National Instruments\LabVIEW 201X\examples\Electrical Power\Power Quality\Applications (cRIO) (Delta-Sigma)
Getting back to the flicker measurement...
I'm trying to calculate the flicker, based on data I measured on a scope.
I can see that to get a valid value, I have to measure at least 10 min and break it to 200msec blocks . Is there a way to use a shorter data (for example, maybe zero padding or pure sinewave padding)?
Also, one of the inputs is the voltage range. There are only 2 options (230 and 120). My system is 400Volt. How should I converter the output?
Attached, a picture of the code (I replace the scope data by simulation)