Probability density function for the mean fault clearing time of 15 cycles (0.3 s) and standard deviation of 10% (0.03 s).
Proposed procedure for determining the probability of stability.
Generic model of a WECS.
Two mass model of the mechanical shaft system.
System under study (modified RBT network).
Rotor angle of SG2 with respect to SG1 when a three-phase fault of 250 ms duration is applied at 10% and then at 90% of line 3 with a WF consisting of DFIG connected to bus 1 and 30% of the SG1 capacity substituted with equal amount of wind power.
Rotor angle of SG2 with respect to SG1 with different fault types (250 ms duration) applied to the middle of line 3.
Response of DFIG speed to different fault type (250 ms duration) applied to the middle of line 3.
Comparison of the CCT of the system when the capacity of SG1 on bus A is substituted with an equal amount of wind power from a different technology at 10% increment of wind power.
The comparison in the rotor speed (a) DFIG and (b) SCIG when a 300 ms three phase fault is created at the middle of line 3.
Probability of stability of the system PSL when a fault is created on each of the lines (L1–L9) at different MFCT.
Effect of fault type in relation to different mean fault clearing times on the overall stability of the system.
Comparison of the influence of wind generator technology on the probability of stability PSL when a fault occurs on each of the lines.
Probability of fault types.
Probability of a fault location.
Overall probability of stability (OPS) of the system when the WF with different technologies (DFIG and SCIG) was connected to bus 1 at a different MFCT.
Overall probability of stability (OPS) of the system when the WF with different technologies (DFIG and SCIG) was connected to bus 2 at different MFCT.
Impacts of fault types on the overall probability of stability of the system when WF of different generator technologies was connected to bus 1 at different wind power penetration levels.
Comparison of OPS between the probabilistic (Prob) and the deterministic (Det) techniques when a wind farm consisting of a DFIG and SCIG were connected to bus 1 in turn.
Synchronous generators capacity used in the load flow.
Synchronous generator parameters.
Hydro governor parameters.
IEEE type 1 exciter parameters.
Induction generator parameters.
DFIG controller parameters.
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