change (shift) the phase angle of an analog input AC voltage signal

[Power Monitoring and control unit]

I am using a current transformer to measure the line current of a power system, The voltage output of the current transformer is is amplified and and is given to NI-USB 6008 unit.  The voltage signal that can be viewd through LabView has a phase shift of 72 degrees. Therefore I need to change (shift) this phase angle to 0 degrees to get the correct current phasor. 

Is there a Labview method to shift the phase of an analog input voltage signal ?

Thank you . 

[cosmin]

Hi,

you could use a lead-lag,

BUT the out of phase is an indication of current transformer error in measurement (angle error) so this shifting possibly will not work in every working set

of the CT.

cosmin

[Kyle_A.]

Hello,

If you are out of phase, you can set up a digital trigger with the 6008 to sync up the time for when you need to start acquiring the signal.  Or you can drop samples from your acquisition to align the signals properly.  The first is done with DAQmx Triggering and the second is post processing your acquired signal in LabVIEW.