Figure 14. Performance of the method for the IEEE-30 bus system: (a) voltage magnitude of the generation bus (V2) in function of λ for contingency N-1, (b) P-V curves of pre-contingency (N-0) and post-contingency (N-1) of the load buses 30 (green points), 5 (blue points) and 2 (red points), (c) number of iterations

From

Studies of Contingencies in Power Systems through a Geometric Parameterization Technique, Part II: Performance Evaluation

Bonini Neto A., Alves D. A.

World Journal Control Science and Engineering. 2014, 2(1), 25-34