Parameters

p PLL

Park PLL

Digital PLL

SRF-PLL

−5 Hz frequency change

Settling time

Static Error

9 cycles

0 deg

9 cycles

0 deg

2.9 cycles

4 deg

2.7 cycles

3 deg

+5 Hz frequency change

Settling time

Static Error

7 cycles

0 deg

7 cycles

0 deg

2.5 cycles

4 deg

2.4 cycles

3 deg

30% increase in voltage

Settling time

5 cycles

2 cycles

0.5 cycles

0.2 cycles

50% increase in voltage

Settling time

6 cycles

3 cycles

0.7 cycles

0.3 cycles

5th and 7th order harmonic injection

Un-locked

Un-locked

Well locked

Well locked