Damping of Low-Frequency Oscillations in a Power System, Based on Multiple-Model Optimal Control Strategy

Table 2

Three-phase fault planning.

Step	Plan	Time (sec)
1	Steady state	t < 0.5
2	There is a 3-phase fault in the middle of lines 1–3	0.5 < t < 0.7
3	Lines 1–3 is opened on both sides	0.7 < t < 1.7
4	The fault is removed and the lines 1–3 are reclosed	t > 1.7