Fault grades

y(m/s)

z(m/s)

No fault

50 Hz

500 Hz

550 Hz

50 Hz

500 Hz

550 Hz

0.028978

0.161224

0.022174

0.034774

0.193543

0.026484

(a) SE results with different fault grades

e1

0.04%

0.27%

0.17%

0.07%

0.41%

0.08%

e2

0.10%

0.57%

0.14%

0.08%

0.88%

0.17%

e3

0.08%

0.87%

0.17%

0.10%

1.50%

0.09%

e4

0.08%

1.24%

0.16%

0.09%

2.49%

0.09%

(b) DE results with different fault grades

e1

5.29%

0.04%

6.89%

6.69%

2.31%

12.23%

e2

9.31%

0.04%

12.14%

10.24%

3.92%

24.04%

e3

13.92%

0.04%

18.17%

14.16%

5.63%

36.50%

e4

18.98%

0.04%

24.78%

28.34%

7.51%

50.24%