Recently I have been experimenting with using Matpower and rundcpf() to simulate cascading branch failures and islanding. One question that has occurred to to me is what happens when there is not enough generator capacity to satisfy the loads at all the buses? I have had little success figuring this out on my own. To this end, I have two questions:

1) Is it possible to modify a case (i.e. case14.m) to create a shortage of generator power? My attempts to do this have failed. Turning down Pmax doesn't seem to limit generator power.

2) How does Matpower handle this case? Is it possible to measure the satisfied load when there aren't enough generators?

Thank you,
  Scott

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