Grid current THD in % for nonlinear load at balanced condition

Method

5^th

7^th

9^th

11^th

13^th

15^th

17^th

THD

SRF-PLL based SAPF (Conventional)

0.40

0.66

0.14

0.96

0.40

0.09

0.70

1.85

ABC based PLL tuning of SAPF (Proposed)

0.04

0.01

0.06

0.50

0.04

0.06

0.39

1.20

Grid current THD in % for nonlinear load at Unbalanced condition

SRF-PLL based SAPF (Conventional)

2.10

1.95

1.69

1.56

0.94

0.81

0.67

4.62

ABC based PLL tuning of SAPF (Proposed)

1.70

1.47

1.41

1.34

0.78

0.81

0.69

3.79

Note : In both cases nonlinear load current (without SAPF) %THD = 25.01