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Table 6 The comparison of previous scenarios

From: Effective damping of local low frequency oscillations in power systems integrated with bulk PV generation

Parameters

Scenarios

Bulk PV station and SG with AVR

PDC and AVR

PDC and PSS

Status

Unstable

Stable

Stable

Optimizer

 

PO

EO

I-GWO

PO

I-GWO

EO

  

Settling time

     

\(\Delta \omega_{r}\)(s)

 

2.5

2.5

2.8

2.4

2.4

2.4

\(\Delta T_{e}\)(s)

 

2.2

2.2

2.2

1.7

1.7

1.7

\(\Delta I_{ds2}\)(s)

 

2.8

2.8

2.9

3.0

3.0

3.0

\(\Delta T_{e}\)

 

Overshooting

     
  

13.8%

15.69%

23.36%

4.1%

5.6%

8.8%

Damping ratio

 

0.2424

0.2337

0.2192

0.376

0.355

0.318