Power calculation using Rogowski coil

[Jcesar1029]

Hello,

I am trying to decide if I should build a VI, or if SignalExpress is capable of computing power based on my transducer selection.

I am trying to calculate three-phase power of a system by using a 2-wattmeter method. I have a NI cDAQ 9178, Rogowski coil, and a NI-9215 module. 

Since the output voltage of the Rogowski coil is 90 degrees out of phase from the actual waveform, I cannot simply multiply the voltage and current waveforms to obtain real power. I need to integrate the signal of the Rogowski coil and then multiply the two signals together.

Is there an option on SignalExpress that allows me to integrate the signal or phase shift the Rogowski output voltage?

Thank you.

[Sil.VI · Accepted solution]

Hi Jcesar,

I think that the best way would be to integrate them in LabVIEW if you have that possibility, other wise a way to do it in SignalExpress could also be to add a LabVIEW step on your SignalExpress project, here you can find a guide that has something similar with a numeric integration.

https://decibel.ni.com/content/docs/DOC-12714 

Hope you may find it helpful!

[Jcesar1029]

Thank you very much!