| Year |
1940s |
1960s |
1976 |
2003 |
2014 |
| compensators |
PPFs |
SVCs |
APFs |
HAPFs |
TCLC-HAPFs |
| Compensation range |
Narrow |
Wide |
Wide |
Narrow |
Wide |
| Harmonics compensation |
Normal |
Poor |
Good |
Good |
Good |
| Cost |
Lowest |
Low |
High |
Normal |
Normal |
| reliability |
high |
High |
Low |
Normal |
Normal |
| Switching loss |
Low |
Low |
high |
Normal |
Normal |
| Tracking performance |
poor |
Poor |
Good |
Poor |
Good |