how to find phase information while usingnpark transformation?

[merin_leo]

hi,my project is vector control of upf converter. I need to get Θ for park transformation. i am using dsPIC30f4011 for vector control algorithm.
how can get this phase information.

 

[FvM]

In park's (or dq-) transformation Θ is the instantaneous phase angle of the rotating reference frame. Where you get it (respectively what the reference frame is) depends strongly on the application. You need to explain what you want to achieve.

 

[merin_leo]

hi,my project is vector control of upf converter. I need to get Θ for park transformation. i am using dsPIC30f4011 for vector control algorithm.
how can get this phase information.

hi, thanx for your reply. in my project i am controlling input power factor by vector control algorithm.so i am transforming 3 phase voltage and current to dq frame. for conversion i need the
Θ value. the control algorithm is implemented in the dspic30f

---------- Post added at 14:23 ---------- Previous post was at 14:20 ----------

In park's (or dq-) transformation Θ is the instantaneous phase angle of the rotating reference frame. Where you get it (respectively what the reference frame is) depends strongly on the application. You need to explain what you want to achieve.

hi, thanx for your reply. in my project i am controlling input power factor by vector control algorithm.so i am transforming 3 phase voltage and current to dq frame. for conversion i need the
Θ value. the control algorithm is implemented in the dspic30f.

---------- Post added at 14:24 ---------- Previous post was at 14:23 ----------

hi, thanx for your reply. in my project i am controlling input power factor by vector control algorithm.so i am transforming 3 phase voltage and current to dq frame. for conversion i need the
Θ value. the control algorithm is implemented in the dspic30f

 

[FvM]

So the grid voltage is your reference frame. An all-digital PLL (ADPLL) can be used to extract the phase.

P.S.: An example from literature