Electronic (V-I trajectory)

[Hang8388]

I do the project in Non-intrusive load monitoring which need to connect to DAQ NI USB-6008, but I cannot do the V-I trajectory for analysis. In V-I trajectory had seven types of things need to show, such as asymmetry, looping direction, area, curvature of mean line, self-intersection, slope of middle segment, area of the left and right segments and the last one is the peak of the middle segment. How to do the V-I trajectory??

[Gregory]

Hi Hang,

Is your trouble with LabVIEW or with the algorithm? For instance, if you had this problem in another programming language of your choice, would you be able to complete it?

It helps if you post your code (.vi files) so we can see how far you are.

[Hang8388]

My stage stays at the feature extraction. I cannot receive the result more accurate. My V-I trajectory and the PQ plane had jump upper and jump off. How can I do well? I am the LabVIEW beginner, hope that has someone can help me!!!

[Hang8388]

My stage stays at the feature extraction. I cannot receive the result more accurate. My V-I trajectory and the PQ plane had jump upper and jump off. How can I do well? I am the LabVIEW beginner, hope that has someone can help me!!!

[Gregory]

Hi Hang,

It is difficult for me to help, because I am not familiar with many of the terms or mathematics you are talking about. But perhaps you can boil the problem down to LabVIEW specific questions. Like:

• How do I find where an array crosses this value
• How do I take a derivative in LabVIEW
• etc.

But, perhaps you would be well served by going through some beginner training. It will take some time up front, but the time savings in the future will be huge. There is some free LabVIEW training online (look at the top links when you first get to the forums) and also some nice courses you can take if you have a software subscription package.

[tahahasan202]

This might help.

https://github.com/taha-hasan/vitraj