Good morning, regarding synch of power converters to grid I note that the basic approach for PLL is trying to reduce the phase error i.e the difference between the real and estimated phase angle.
To that end a Park transformation is applied to convert the abc voltages to dq voltages via Park transformation.
I note that in several papers the Vq component is used to compute the phase error while in others Vp is used.
Would you kindly advice which option is preferable in your opinion.
Thanks in advance a Merry NY2K20!
Juan Cabeza
can you please explain what is Vp
as for me i always work on Vq which is working good for me
Ashraf Abbas good morning, mi mistake - by "Vp" I meant "Vd", ie the direct component.
Dear Juan,
As both Vp and Vq are synchronized to each other, then any one of them is suitable to perform as reference for the phase locked loop.
This is a conceptual question concerning the operation of the PLL and the relationship between Vp and Vq.
Best wishes
PLL IS USED FOR
FM RECOVERY .
FOR AN FM
SIGNAL S(t)
MIXED WITH A
VCO OUTPUT THEN
BASEBAND FILTER
WE GET THE
INFORMATION m(t)
THAT IS THE INPUT
TO THE VCO.
Many techniques are available for PLL implementation. Among various solutions, the synchronous reference frame based PLL is widely used due to its easy implementation and robustness in distorted voltage cases, so any one of Vq or Vd is suitable to perform as reference for the PLL.
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